perf: Fix all clazy qstring-allocation warnings (#903)

src/app/main.cpp

@@ -95,14 +95,14 @@ void addLanguagePackages()
 
 int main(int argc, char *argv[])
 {
-	QCoreApplication::addLibraryPath(".");
+	QCoreApplication::addLibraryPath(QStringLiteral("."));
 
 	if (utility::getOsType() == OS_LINUX && std::getenv("SOURCETRAIL_VIA_SCRIPT") == nullptr)
 	{
 		std::cout << "ERROR: Please run Sourcetrail via the Sourcetrail.sh script!" << std::endl;
 	}
 
-	QApplication::setApplicationName("Sourcetrail");
+	QApplication::setApplicationName(QStringLiteral("Sourcetrail"));
 
 	if (utility::getOsType() != OS_LINUX)
 	{

src/lib_gui/qt/element/bookmark/QtBookmark.cpp

@@ -16,7 +16,7 @@ QtBookmark::QtBookmark(ControllerProxy<BookmarkController>* controllerProxy)
 	, m_hovered(false)
 	, m_ignoreNextResize(false)
 {
-	setObjectName("bookmark");
+	setObjectName(QStringLiteral("bookmark"));
 
 	QVBoxLayout* layout = new QVBoxLayout();
 	layout->setSpacing(0);
@@ -30,14 +30,14 @@ QtBookmark::QtBookmark(ControllerProxy<BookmarkController>* controllerProxy)
 	buttonsLayout->setAlignment(Qt::AlignTop);
 
 	m_activateButton = new QPushButton();
-	m_activateButton->setObjectName("activate_button");
-	m_activateButton->setToolTip("Activate bookmark");
+	m_activateButton->setObjectName(QStringLiteral("activate_button"));
+	m_activateButton->setToolTip(QStringLiteral("Activate bookmark"));
 	m_activateButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
 	buttonsLayout->addWidget(m_activateButton);
 
 	m_toggleCommentButton = new QPushButton();
-	m_toggleCommentButton->setObjectName("comment_button");
-	m_toggleCommentButton->setToolTip("Show Comment");
+	m_toggleCommentButton->setObjectName(QStringLiteral("comment_button"));
+	m_toggleCommentButton->setToolTip(QStringLiteral("Show Comment"));
 	m_toggleCommentButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
 	m_toggleCommentButton->setIconSize(QSize(20, 20));
 	utility::setWidgetRetainsSpaceWhenHidden(m_toggleCommentButton);
@@ -47,12 +47,12 @@ QtBookmark::QtBookmark(ControllerProxy<BookmarkController>* controllerProxy)
 	buttonsLayout->addStretch();
 
 	m_dateLabel = new QLabel();
-	m_dateLabel->setObjectName("date_label");
+	m_dateLabel->setObjectName(QStringLiteral("date_label"));
 	buttonsLayout->addWidget(m_dateLabel);
 
 	m_editButton = new QPushButton();
-	m_editButton->setObjectName("edit_button");
-	m_editButton->setToolTip("Edit bookmark");
+	m_editButton->setObjectName(QStringLiteral("edit_button"));
+	m_editButton->setToolTip(QStringLiteral("Edit bookmark"));
 	m_editButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
 	m_editButton->setIconSize(QSize(20, 20));
 	m_editButton->setIcon(QPixmap(QString::fromStdWString(
@@ -62,8 +62,8 @@ QtBookmark::QtBookmark(ControllerProxy<BookmarkController>* controllerProxy)
 	buttonsLayout->addWidget(m_editButton);
 
 	m_deleteButton = new QPushButton();
-	m_deleteButton->setObjectName("delete_button");
-	m_deleteButton->setToolTip("Delete bookmark");
+	m_deleteButton->setObjectName(QStringLiteral("delete_button"));
+	m_deleteButton->setToolTip(QStringLiteral("Delete bookmark"));
 	m_deleteButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
 	m_deleteButton->setIconSize(QSize(20, 20));
 	m_deleteButton->setIcon(QPixmap(
@@ -76,8 +76,8 @@ QtBookmark::QtBookmark(ControllerProxy<BookmarkController>* controllerProxy)
 
 	layout->addLayout(buttonsLayout);
 
-	m_comment = new QLabel("");
-	m_comment->setObjectName("bookmark_comment");
+	m_comment = new QLabel(QLatin1String(""));
+	m_comment->setObjectName(QStringLiteral("bookmark_comment"));
 	m_comment->setWordWrap(true);
 	m_comment->hide();
 	layout->addWidget(m_comment);
@@ -212,10 +212,10 @@ void QtBookmark::editClicked()
 void QtBookmark::deleteClicked()
 {
 	QMessageBox msgBox;
-	msgBox.setText("Delete Bookmark");
-	msgBox.setInformativeText("Do you really want to delete this bookmark?");
-	msgBox.addButton("Delete", QMessageBox::ButtonRole::YesRole);
-	msgBox.addButton("Keep", QMessageBox::ButtonRole::NoRole);
+	msgBox.setText(QStringLiteral("Delete Bookmark"));
+	msgBox.setInformativeText(QStringLiteral("Do you really want to delete this bookmark?"));
+	msgBox.addButton(QStringLiteral("Delete"), QMessageBox::ButtonRole::YesRole);
+	msgBox.addButton(QStringLiteral("Keep"), QMessageBox::ButtonRole::NoRole);
 	msgBox.setIcon(QMessageBox::Icon::Question);
 	int ret = msgBox.exec();
 

src/lib_gui/qt/element/bookmark/QtBookmarkCategory.cpp

@@ -12,7 +12,7 @@
 QtBookmarkCategory::QtBookmarkCategory(ControllerProxy<BookmarkController>* controllerProxy)
 	: m_controllerProxy(controllerProxy), m_id(0)
 {
-	setObjectName("bookmark_category");
+	setObjectName(QStringLiteral("bookmark_category"));
 
 	QHBoxLayout* layout = new QHBoxLayout();
 	layout->setSpacing(0);
@@ -21,8 +21,8 @@ QtBookmarkCategory::QtBookmarkCategory(ControllerProxy<BookmarkController>* cont
 	setLayout(layout);
 
 	m_expandButton = new QPushButton();
-	m_expandButton->setObjectName("category_expand_button");
-	m_expandButton->setToolTip("Show/Hide bookmarks in this category");
+	m_expandButton->setObjectName(QStringLiteral("category_expand_button"));
+	m_expandButton->setToolTip(QStringLiteral("Show/Hide bookmarks in this category"));
 	m_expandButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
 	m_expandButton->setIcon(QPixmap(QString::fromStdWString(
 		ResourcePaths::getGuiPath().concatenate(L"bookmark_view/images/arrow_down.png").wstr())));
@@ -32,14 +32,14 @@ QtBookmarkCategory::QtBookmarkCategory(ControllerProxy<BookmarkController>* cont
 	connect(m_expandButton, &QPushButton::clicked, this, &QtBookmarkCategory::expandClicked);
 
 	m_name = new QLabel();
-	m_name->setObjectName("category_name");
+	m_name->setObjectName(QStringLiteral("category_name"));
 	layout->addWidget(m_name);
 
 	layout->addStretch();
 
 	m_deleteButton = new QPushButton();
-	m_deleteButton->setObjectName("category_delete_button");
-	m_deleteButton->setToolTip("Delete this Bookmark Category and the containing Bookmarks");
+	m_deleteButton->setObjectName(QStringLiteral("category_delete_button"));
+	m_deleteButton->setToolTip(QStringLiteral("Delete this Bookmark Category and the containing Bookmarks"));
 	m_deleteButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);
 	m_deleteButton->setIconSize(QSize(20, 20));
 	m_deleteButton->setIcon(QPixmap(
@@ -121,11 +121,11 @@ void QtBookmarkCategory::leaveEvent(QEvent* event)
 void QtBookmarkCategory::deleteClicked()
 {
 	QMessageBox msgBox;
-	msgBox.setText("Delete Category");
+	msgBox.setText(QStringLiteral("Delete Category"));
 	msgBox.setInformativeText(
-		"Do you really want to delete this category AND all containing bookmarks?");
-	msgBox.addButton("Delete", QMessageBox::ButtonRole::YesRole);
-	msgBox.addButton("Keep", QMessageBox::ButtonRole::NoRole);
+		QStringLiteral("Do you really want to delete this category AND all containing bookmarks?"));
+	msgBox.addButton(QStringLiteral("Delete"), QMessageBox::ButtonRole::YesRole);
+	msgBox.addButton(QStringLiteral("Keep"), QMessageBox::ButtonRole::NoRole);
 	msgBox.setIcon(QMessageBox::Icon::Question);
 	int ret = msgBox.exec();
 

src/lib_gui/qt/element/button/QtHelpButton.cpp

@@ -16,9 +16,9 @@ QtHelpButton::QtHelpButton(const QString& helpTitle, const QString& helpText, QW
 	setAttribute(Qt::WA_LayoutUsesWidgetRect);	  // fixes layouting on Mac
 	setMouseTracking(true);
 
-	setToolTip("help");
+	setToolTip(QStringLiteral("help"));
 	setIconSize(QSize(16, 16));
-	setObjectName("helpButton");
+	setObjectName(QStringLiteral("helpButton"));
 
 	leaveEvent(nullptr);
 
@@ -28,7 +28,7 @@ QtHelpButton::QtHelpButton(const QString& helpTitle, const QString& helpText, QW
 void QtHelpButton::handleHelpPress()
 {
 	QMessageBox msgBox;
-	msgBox.setWindowTitle("Sourcetrail");
+	msgBox.setWindowTitle(QStringLiteral("Sourcetrail"));
 	msgBox.setIcon(QMessageBox::Information);
 	msgBox.setText("<b>" + m_helpTitle + "</b>");
 	msgBox.setInformativeText(m_helpText);

src/lib_gui/qt/element/button/QtHoverButton.cpp

@@ -1,6 +1,6 @@
 #include "QtHoverButton.h"
 
-QtHoverButton::QtHoverButton(QWidget* parent): QPushButton("", parent)
+QtHoverButton::QtHoverButton(QWidget* parent): QPushButton(QLatin1String(""), parent)
 {
 	setAttribute(Qt::WA_LayoutUsesWidgetRect);	  // fixes layouting on Mac
 	setMouseTracking(true);

src/lib_gui/qt/element/button/QtIconButton.cpp

@@ -5,7 +5,7 @@
 #include "utilityQt.h"
 
 QtIconButton::QtIconButton(const FilePath& iconPath, const FilePath& hoveredIconPath, QWidget* parent)
-	: QPushButton("", parent)
+	: QPushButton(QLatin1String(""), parent)
 	, m_iconPath(iconPath)
 	, m_hoveredIconPath(hoveredIconPath)
 	, m_color(Qt::transparent)

src/lib_gui/qt/element/button/QtIconStateButton.cpp

@@ -4,13 +4,13 @@
 
 #include "utilityQt.h"
 
-QtIconStateButton::QtIconStateButton(QWidget* parent): QPushButton("", parent)
+QtIconStateButton::QtIconStateButton(QWidget* parent): QPushButton(QLatin1String(""), parent)
 {
 	setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 	setAttribute(Qt::WA_LayoutUsesWidgetRect);	  // fixes layouting on Mac
 	setMouseTracking(true);
 
-	setObjectName("iconStateButton");
+	setObjectName(QStringLiteral("iconStateButton"));
 
 	leaveEvent(nullptr);
 }

src/lib_gui/qt/element/code/QtCodeArea.cpp

@@ -55,7 +55,7 @@ bool MouseWheelOverScrollbarFilter::eventFilter(QObject* obj, QEvent* event)
 
 QtLineNumberArea::QtLineNumberArea(QtCodeArea* codeArea): QWidget(codeArea), m_codeArea(codeArea)
 {
-	setObjectName("line_number_area");
+	setObjectName(QStringLiteral("line_number_area"));
 }
 
 QtLineNumberArea::~QtLineNumberArea() {}

src/lib_gui/qt/element/code/QtCodeField.cpp

@@ -40,7 +40,7 @@ QtCodeField::QtCodeField(
 {
 	TRACE();
 
-	setObjectName("code_area");
+	setObjectName(QStringLiteral("code_area"));
 	setReadOnly(true);
 	setFrameStyle(QFrame::NoFrame);
 	setLineWrapMode(QPlainTextEdit::NoWrap);
@@ -96,9 +96,9 @@ QtCodeField::QtCodeField(
 	setFont(font);
 	setTabStopWidth(appSettings->getCodeTabWidth() * fontMetrics().width('9'));
 
-	m_openInTabAction = new QAction("Open in New Tab", this);
-	m_openInTabAction->setStatusTip("Opens the node in a new tab");
-	m_openInTabAction->setToolTip("Opens the node in a new tab");
+	m_openInTabAction = new QAction(QStringLiteral("Open in New Tab"), this);
+	m_openInTabAction->setStatusTip(QStringLiteral("Opens the node in a new tab"));
+	m_openInTabAction->setToolTip(QStringLiteral("Opens the node in a new tab"));
 	m_openInTabAction->setEnabled(false);
 	connect(m_openInTabAction, &QAction::triggered, this, &QtCodeField::openInTab);
 }
@@ -771,7 +771,7 @@ void QtCodeField::createMultibyteCharacterLocationCache(const QString& code)
 	QTextCodec* codec = QTextCodec::codecForName(
 		ApplicationSettings::getInstance()->getTextEncoding().c_str());
 
-	for (const QString& line: code.split("\n"))
+	for (const QString& line: code.split(QStringLiteral("\n")))
 	{
 		std::vector<std::pair<int, int>> columnsToOffsets;
 		for (int i = 0; i < line.size(); i++)

src/lib_gui/qt/element/code/QtCodeFile.cpp

@@ -13,7 +13,7 @@
 QtCodeFile::QtCodeFile(const FilePath& filePath, QtCodeNavigator* navigator, bool isFirst)
 	: QFrame(), m_navigator(navigator), m_filePath(filePath), m_isWholeFile(false)
 {
-	setObjectName("code_file");
+	setObjectName(QStringLiteral("code_file"));
 	setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Fixed);
 
 	QVBoxLayout* layout = new QVBoxLayout(this);

src/lib_gui/qt/element/code/QtCodeFileList.cpp

@@ -25,11 +25,11 @@ QtCodeFileList::QtCodeFileList(QtCodeNavigator* navigator)
 {
 	m_scrollArea = new QScrollArea();
 
-	m_scrollArea->setObjectName("code_container");
+	m_scrollArea->setObjectName(QStringLiteral("code_container"));
 	m_scrollArea->setWidgetResizable(true);
 
 	m_filesArea = new QFrame();
-	m_filesArea->setObjectName("code_file_list");
+	m_filesArea->setObjectName(QStringLiteral("code_file_list"));
 
 	QVBoxLayout* innerLayout = new QVBoxLayout();
 	innerLayout->setSpacing(0);
@@ -53,7 +53,7 @@ QtCodeFileList::QtCodeFileList(QtCodeNavigator* navigator)
 	}
 	else
 	{
-		m_lastSnippetScrollBar->setObjectName("last_scroll_bar");
+		m_lastSnippetScrollBar->setObjectName(QStringLiteral("last_scroll_bar"));
 	}
 
 	m_lastSnippetScrollBar->hide();

src/lib_gui/qt/element/code/QtCodeFileSingle.cpp

@@ -19,20 +19,20 @@
 QtCodeFileSingle::QtCodeFileSingle(QtCodeNavigator* navigator, QWidget* parent)
 	: m_navigator(navigator), m_area(nullptr)
 {
-	setObjectName("code_container");
+	setObjectName(QStringLiteral("code_container"));
 
 	setLayout(new QVBoxLayout(this));
 	layout()->setContentsMargins(0, 0, 0, 0);
 	layout()->setSpacing(0);
 
 	m_titleBar = new QtCodeFileTitleBar(this, false, true);
-	m_titleBar->setObjectName("title_bar_single");
+	m_titleBar->setObjectName(QStringLiteral("title_bar_single"));
 	layout()->addWidget(m_titleBar);
 
 	connect(m_titleBar, &QtCodeFileTitleBar::snippet, this, &QtCodeFileSingle::clickedSnippetButton);
 
 	m_areaWrapper = new QWidget();
-	m_areaWrapper->setObjectName("code_file_single");
+	m_areaWrapper->setObjectName(QStringLiteral("code_file_single"));
 	m_areaWrapper->setSizePolicy(
 		m_areaWrapper->sizePolicy().horizontalPolicy(), QSizePolicy::Expanding);
 	m_areaWrapper->setLayout(new QVBoxLayout());

src/lib_gui/qt/element/code/QtCodeFileTitleBar.cpp

@@ -14,7 +14,7 @@
 QtCodeFileTitleBar::QtCodeFileTitleBar(QWidget* parent, bool isHovering, bool isSingle)
 	: QtHoverButton(parent)
 {
-	setObjectName("title_bar");
+	setObjectName(QStringLiteral("title_bar"));
 	setProperty("hovering", isHovering);
 	setAttribute(Qt::WA_LayoutUsesWidgetRect);	  // fixes layouting on Mac
 
@@ -32,17 +32,17 @@ QtCodeFileTitleBar::QtCodeFileTitleBar(QWidget* parent, bool isHovering, bool is
 	FilePath imageDir = ResourcePaths::getGuiPath().concatenate(L"code_view/images/");
 
 	m_expandButton = new QtSelfRefreshIconButton(
-		"", imageDir.getConcatenated(L"snippet_arrow_right.png"), "code/file/title", this);
+		QLatin1String(""), imageDir.getConcatenated(L"snippet_arrow_right.png"), "code/file/title", this);
 	m_collapseButton = new QtSelfRefreshIconButton(
-		"", imageDir.getConcatenated(L"snippet_arrow_down.png"), "code/file/title", this);
+		QLatin1String(""), imageDir.getConcatenated(L"snippet_arrow_down.png"), "code/file/title", this);
 
-	m_expandButton->setToolTip("expand");
-	m_collapseButton->setToolTip("collapse");
+	m_expandButton->setToolTip(QStringLiteral("expand"));
+	m_collapseButton->setToolTip(QStringLiteral("collapse"));
 
 	for (QtSelfRefreshIconButton* button: {m_expandButton, m_collapseButton})
 	{
 		button->setIconSize(QSize(9, 9));
-		button->setObjectName("expand_button");
+		button->setObjectName(QStringLiteral("expand_button"));
 		titleLayout->addWidget(button);
 	}
 
@@ -66,15 +66,15 @@ QtCodeFileTitleBar::QtCodeFileTitleBar(QWidget* parent, bool isHovering, bool is
 	setMinimumHeight(m_titleButton->height() + 4);
 
 	m_referenceCount = new QLabel(this);
-	m_referenceCount->setObjectName("references_label");
+	m_referenceCount->setObjectName(QStringLiteral("references_label"));
 	m_referenceCount->hide();
 	titleLayout->addWidget(m_referenceCount);
 
 	titleLayout->addStretch(3);
 
-	m_showErrorsButton = new QPushButton("show errors");
-	m_showErrorsButton->setObjectName("screen_button");
-	m_showErrorsButton->setToolTip("Show all errors causing this file to be incomplete");
+	m_showErrorsButton = new QPushButton(QStringLiteral("show errors"));
+	m_showErrorsButton->setObjectName(QStringLiteral("screen_button"));
+	m_showErrorsButton->setToolTip(QStringLiteral("Show all errors causing this file to be incomplete"));
 	m_showErrorsButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);	  // fixes layouting on Mac
 	m_showErrorsButton->hide();
 	titleLayout->addWidget(m_showErrorsButton);
@@ -94,7 +94,7 @@ QtCodeFileTitleBar::QtCodeFileTitleBar(QWidget* parent, bool isHovering, bool is
 		inactiveColor);
 	m_snippetButton->addState(
 		QtIconStateButton::STATE_DISABLED, imageDir.getConcatenated(L"snippet_inactive.png"));
-	m_snippetButton->setToolTip("show snippets");
+	m_snippetButton->setToolTip(QStringLiteral("show snippets"));
 
 	m_maximizeButton = new QtIconStateButton(this);
 	m_maximizeButton->addState(
@@ -105,12 +105,12 @@ QtCodeFileTitleBar::QtCodeFileTitleBar(QWidget* parent, bool isHovering, bool is
 		inactiveColor);
 	m_maximizeButton->addState(
 		QtIconStateButton::STATE_DISABLED, imageDir.getConcatenated(L"maximize_inactive.png"));
-	m_maximizeButton->setToolTip("maximize");
+	m_maximizeButton->setToolTip(QStringLiteral("maximize"));
 
 	for (QtIconStateButton* button: {m_snippetButton, m_maximizeButton})
 	{
 		button->setIconSize(QSize(16, 16));
-		button->setObjectName("file_button");
+		button->setObjectName(QStringLiteral("file_button"));
 		button->setEnabled(false);
 		titleLayout->addWidget(button);
 	}
@@ -160,18 +160,18 @@ void QtCodeFileTitleBar::updateRefCount(int refCount, bool hasErrors, size_t fat
 {
 	if (refCount > 0)
 	{
-		QString label = hasErrors ? "error" : "reference";
+		QString label = hasErrors ? QStringLiteral("error") : QStringLiteral("reference");
 		if (refCount > 1)
 		{
-			label += "s";
+			label += QChar('s');
 		}
 
 		if (fatalErrorCount > 0)
 		{
-			label += " (" + QString::number(fatalErrorCount) + " fatal)";
+			label += QStringLiteral(" (") + QString::number(fatalErrorCount) + QStringLiteral(" fatal)");
 		}
 
-		QString text = QString::number(refCount) + " " + label;
+		QString text = QString::number(refCount) + QChar(' ') + label;
 		if (text != m_referenceCount->text())
 		{
 			m_referenceCount->setText(text);

src/lib_gui/qt/element/code/QtCodeFileTitleButton.cpp

@@ -17,11 +17,11 @@
 #include "QtContextMenu.h"
 
 QtCodeFileTitleButton::QtCodeFileTitleButton(QWidget* parent)
-	: QtSelfRefreshIconButton("", FilePath(), "code/file/title", parent)
+	: QtSelfRefreshIconButton(QLatin1String(""), FilePath(), "code/file/title", parent)
 	, m_isComplete(true)
 	, m_isIndexed(true)
 {
-	setObjectName("title_button");
+	setObjectName(QStringLiteral("title_button"));
 	minimumSizeHint();	  // force font loading
 
 	setFixedHeight(std::max(fontMetrics().height() * 1.2, 28.0));
@@ -31,9 +31,9 @@ QtCodeFileTitleButton::QtCodeFileTitleButton(QWidget* parent)
 
 	connect(this, &QtCodeFileTitleButton::clicked, this, &QtCodeFileTitleButton::clickedTitle);
 
-	m_openInTabAction = new QAction("Open in New Tab", this);
-	m_openInTabAction->setStatusTip("Opens the file in a new tab");
-	m_openInTabAction->setToolTip("Opens the file in a new tab");
+	m_openInTabAction = new QAction(QStringLiteral("Open in New Tab"), this);
+	m_openInTabAction->setStatusTip(QStringLiteral("Opens the file in a new tab"));
+	m_openInTabAction->setToolTip(QStringLiteral("Opens the file in a new tab"));
 	m_openInTabAction->setEnabled(false);
 	connect(m_openInTabAction, &QAction::triggered, this, &QtCodeFileTitleButton::openInTab);
 }
@@ -65,7 +65,7 @@ void QtCodeFileTitleButton::setProject(const std::wstring& name)
 	m_filePath = FilePath();
 
 	setText(QString::fromStdWString(name));
-	setToolTip("edit project");
+	setToolTip(QStringLiteral("edit project"));
 
 	updateIcon();
 }
@@ -273,6 +273,6 @@ void QtCodeFileTitleButton::updateHatching()
 	}
 	else
 	{
-		setStyleSheet("");
+		setStyleSheet(QLatin1String(""));
 	}
 }

src/lib_gui/qt/element/code/QtCodeNavigator.cpp

@@ -35,7 +35,7 @@ QtCodeNavigator::QtCodeNavigator(QWidget* parent)
 
 	{
 		QWidget* navigation = new QWidget();
-		navigation->setObjectName("code_navigation");
+		navigation->setObjectName(QStringLiteral("code_navigation"));
 
 		QHBoxLayout* navLayout = new QHBoxLayout();
 		navLayout->setSpacing(2);
@@ -47,11 +47,11 @@ QtCodeNavigator::QtCodeNavigator(QWidget* parent)
 			m_nextReferenceButton = new QtSearchBarButton(
 				ResourcePaths::getGuiPath().concatenate(L"code_view/images/arrow_down.png"), true);
 
-			m_prevReferenceButton->setObjectName("reference_button_previous");
-			m_nextReferenceButton->setObjectName("reference_button_next");
+			m_prevReferenceButton->setObjectName(QStringLiteral("reference_button_previous"));
+			m_nextReferenceButton->setObjectName(QStringLiteral("reference_button_next"));
 
-			m_prevReferenceButton->setToolTip("previous reference");
-			m_nextReferenceButton->setToolTip("next reference");
+			m_prevReferenceButton->setToolTip(QStringLiteral("previous reference"));
+			m_nextReferenceButton->setToolTip(QStringLiteral("next reference"));
 
 			m_prevReferenceButton->setIconSize(QSize(12, 12));
 			m_nextReferenceButton->setIconSize(QSize(12, 12));
@@ -65,8 +65,8 @@ QtCodeNavigator::QtCodeNavigator(QWidget* parent)
 				m_nextReferenceButton, &QPushButton::clicked, this, &QtCodeNavigator::nextReference);
 
 			// m_refLabel = new QLabel("0 files  |  0 references");
-			m_refLabel = new QLabel("0 references");
-			m_refLabel->setObjectName("references_label");
+			m_refLabel = new QLabel(QStringLiteral("0 references"));
+			m_refLabel->setObjectName(QStringLiteral("references_label"));
 			navLayout->addWidget(m_refLabel);
 
 			navLayout->addStretch();
@@ -78,11 +78,11 @@ QtCodeNavigator::QtCodeNavigator(QWidget* parent)
 			m_nextLocalReferenceButton = new QtSearchBarButton(
 				ResourcePaths::getGuiPath().concatenate(L"code_view/images/arrow_down.png"), true);
 
-			m_prevLocalReferenceButton->setObjectName("local_reference_button_previous");
-			m_nextLocalReferenceButton->setObjectName("local_reference_button_next");
+			m_prevLocalReferenceButton->setObjectName(QStringLiteral("local_reference_button_previous"));
+			m_nextLocalReferenceButton->setObjectName(QStringLiteral("local_reference_button_next"));
 
-			m_prevLocalReferenceButton->setToolTip("previous local reference");
-			m_nextLocalReferenceButton->setToolTip("next local reference");
+			m_prevLocalReferenceButton->setToolTip(QStringLiteral("previous local reference"));
+			m_nextLocalReferenceButton->setToolTip(QStringLiteral("next local reference"));
 
 			m_prevLocalReferenceButton->setIconSize(QSize(12, 12));
 			m_nextLocalReferenceButton->setIconSize(QSize(12, 12));
@@ -101,8 +101,8 @@ QtCodeNavigator::QtCodeNavigator(QWidget* parent)
 				this,
 				&QtCodeNavigator::nextLocalReference);
 
-			m_localRefLabel = new QLabel("0/0 local references");
-			m_localRefLabel->setObjectName("references_label");
+			m_localRefLabel = new QLabel(QStringLiteral("0/0 local references"));
+			m_localRefLabel->setObjectName(QStringLiteral("references_label"));
 			navLayout->addWidget(m_localRefLabel);
 
 			navLayout->addStretch();
@@ -121,11 +121,11 @@ QtCodeNavigator::QtCodeNavigator(QWidget* parent)
 		m_fileButton = new QtSearchBarButton(
 			ResourcePaths::getGuiPath().concatenate(L"code_view/images/file.png"), true);
 
-		m_listButton->setObjectName("mode_button_list");
-		m_fileButton->setObjectName("mode_button_single");
+		m_listButton->setObjectName(QStringLiteral("mode_button_list"));
+		m_fileButton->setObjectName(QStringLiteral("mode_button_single"));
 
-		m_listButton->setToolTip("snippet list mode");
-		m_fileButton->setToolTip("single file mode");
+		m_listButton->setToolTip(QStringLiteral("snippet list mode"));
+		m_fileButton->setToolTip(QStringLiteral("single file mode"));
 
 		m_listButton->setCheckable(true);
 		m_fileButton->setCheckable(true);
@@ -149,7 +149,7 @@ QtCodeNavigator::QtCodeNavigator(QWidget* parent)
 		m_separatorLine = new QFrame();
 		m_separatorLine->setFrameShape(QFrame::HLine);
 		m_separatorLine->setFrameShadow(QFrame::Plain);
-		m_separatorLine->setObjectName("separator_line");
+		m_separatorLine->setObjectName(QStringLiteral("separator_line"));
 		m_separatorLine->setFixedHeight(1);
 		m_separatorLine->hide();
 		layout->addWidget(m_separatorLine);

src/lib_gui/qt/element/code/QtCodeSnippet.cpp

@@ -22,7 +22,7 @@ QtCodeSnippet::QtCodeSnippet(const CodeSnippetParams& params, QtCodeNavigator* n
 	, m_footer(nullptr)
 	, m_codeArea(nullptr)
 {
-	setObjectName("code_snippet");
+	setObjectName(QStringLiteral("code_snippet"));
 
 	QVBoxLayout* layout = new QVBoxLayout(this);
 	layout->setMargin(0);
@@ -189,13 +189,13 @@ QPushButton* QtCodeSnippet::createScopeLine(QBoxLayout* layout)
 	layout->addLayout(lineLayout);
 
 	QPushButton* dots = new QPushButton(this);
-	dots->setObjectName("dots");
+	dots->setObjectName(QStringLiteral("dots"));
 	dots->setAttribute(Qt::WA_LayoutUsesWidgetRect);	// fixes layouting on Mac
 	lineLayout->addWidget(dots);
 	m_dots.push_back(dots);
 
 	QPushButton* line = new QPushButton(this);
-	line->setObjectName("scope_name");
+	line->setObjectName(QStringLiteral("scope_name"));
 	line->minimumSizeHint();							// force font loading
 	line->setAttribute(Qt::WA_LayoutUsesWidgetRect);	// fixes layouting on Mac
 	line->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);

src/lib_gui/qt/element/dialog/QtListBox.cpp

@@ -19,7 +19,7 @@ QtListBox::QtListBox(QWidget* parent, const QString& listName): QFrame(parent),
 	layout->setAlignment(Qt::AlignTop);
 
 	m_list = new QtListWidget(this);
-	m_list->setObjectName("list");
+	m_list->setObjectName(QStringLiteral("list"));
 	m_list->setAttribute(Qt::WA_MacShowFocusRect, 0);
 	connect(m_list, &QListWidget::doubleClicked, this, &QtListBox::doubleClicked);
 
@@ -28,7 +28,7 @@ QtListBox::QtListBox(QWidget* parent, const QString& listName): QFrame(parent),
 	layout->addWidget(m_list, 5);
 
 	QWidget* buttonContainer = new QWidget(this);
-	buttonContainer->setObjectName("bar");
+	buttonContainer->setObjectName(QStringLiteral("bar"));
 
 	QHBoxLayout* barLayout = new QHBoxLayout();
 	barLayout->setContentsMargins(8, 4, 8, 2);
@@ -38,16 +38,16 @@ QtListBox::QtListBox(QWidget* parent, const QString& listName): QFrame(parent),
 		ResourcePaths::getGuiPath().concatenate(L"window/plus.png"),
 		ResourcePaths::getGuiPath().concatenate(L"window/plus_hover.png"));
 	m_addButton->setIconSize(QSize(16, 16));
-	m_addButton->setObjectName("plusButton");
-	m_addButton->setToolTip("add line");
+	m_addButton->setObjectName(QStringLiteral("plusButton"));
+	m_addButton->setToolTip(QStringLiteral("add line"));
 	barLayout->addWidget(m_addButton);
 
 	m_removeButton = new QtIconButton(
 		ResourcePaths::getGuiPath().concatenate(L"window/minus.png"),
 		ResourcePaths::getGuiPath().concatenate(L"window/minus_hover.png"));
 	m_removeButton->setIconSize(QSize(16, 16));
-	m_removeButton->setObjectName("minusButton");
-	m_removeButton->setToolTip("remove line");
+	m_removeButton->setObjectName(QStringLiteral("minusButton"));
+	m_removeButton->setToolTip(QStringLiteral("remove line"));
 	barLayout->addWidget(m_removeButton);
 
 	barLayout->addStretch();
@@ -58,8 +58,8 @@ QtListBox::QtListBox(QWidget* parent, const QString& listName): QFrame(parent),
 	QPushButton* editButton = new QtIconButton(
 		ResourcePaths::getGuiPath().concatenate(L"code_view/images/edit.png"), FilePath());
 	editButton->setIconSize(QSize(16, 16));
-	editButton->setObjectName("editButton");
-	editButton->setToolTip("edit plain text");
+	editButton->setObjectName(QStringLiteral("editButton"));
+	editButton->setToolTip(QStringLiteral("edit plain text"));
 	barLayout->addWidget(editButton);
 
 	buttonContainer->setLayout(barLayout);

src/lib_gui/qt/element/dialog/QtListBoxItem.cpp

@@ -22,7 +22,7 @@ QtListBoxItem::QtListBoxItem(QListWidgetItem* item, QWidget* parent)
 	m_data = new QtLineEdit(this);
 	m_data->setAttribute(Qt::WA_MacShowFocusRect, 0);
 	m_data->setAttribute(Qt::WA_LayoutUsesWidgetRect);	  // fixes layouting on Mac
-	m_data->setObjectName("field");
+	m_data->setObjectName(QStringLiteral("field"));
 	m_data->setAcceptDrops(false);
 	layout->addWidget(m_data);
 

src/lib_gui/qt/element/dialog/QtLocationPicker.cpp

@@ -13,7 +13,7 @@
 
 QtLocationPicker::QtLocationPicker(QWidget* parent): QWidget(parent), m_pickDirectory(false)
 {
-	setObjectName("picker");
+	setObjectName(QStringLiteral("picker"));
 
 	QBoxLayout* layout = new QHBoxLayout();
 	layout->setSpacing(0);
@@ -22,7 +22,7 @@ QtLocationPicker::QtLocationPicker(QWidget* parent): QWidget(parent), m_pickDire
 
 	m_data = new QtLineEdit(this);
 	m_data->setAttribute(Qt::WA_MacShowFocusRect, 0);
-	m_data->setObjectName("locationField");
+	m_data->setObjectName(QStringLiteral("locationField"));
 	connect(m_data, &QtLineEdit::textChanged, this, &QtLocationPicker::onDataTextChanged);
 	layout->addWidget(m_data);
 
@@ -30,8 +30,8 @@ QtLocationPicker::QtLocationPicker(QWidget* parent): QWidget(parent), m_pickDire
 		ResourcePaths::getGuiPath().concatenate(L"window/dots.png"),
 		ResourcePaths::getGuiPath().concatenate(L"window/dots_hover.png"));
 	m_button->setIconSize(QSize(16, 16));
-	m_button->setObjectName("dotsButton");
-	m_button->setToolTip("pick file");
+	m_button->setObjectName(QStringLiteral("dotsButton"));
+	m_button->setToolTip(QStringLiteral("pick file"));
 	connect(m_button, &QPushButton::clicked, this, &QtLocationPicker::onHandleButtonPressed);
 	layout->addWidget(m_button);
 

src/lib_gui/qt/element/dialog/QtNewsWidget.cpp

@@ -20,17 +20,17 @@ QtNewsWidget::QtNewsWidget(QWidget* parent): QWidget(parent)
 	layout->setSpacing(0);
 
 	m_text = new QtTextEdit();
-	m_text->setObjectName("textField");
+	m_text->setObjectName(QStringLiteral("textField"));
 	m_text->setReadOnly(true);
 	m_text->setTabStopWidth(8 * m_text->fontMetrics().width('9'));
 	m_text->setViewportMargins(6, 4, 16, 4);
 	m_text->setOpenExternalLinks(true);
 	layout->addWidget(m_text);
 
-	QString placeholder = "No news available";
+	QString placeholder = QStringLiteral("No news available");
 	if (!ApplicationSettings::getInstance()->getAutomaticUpdateCheck())
 	{
-		placeholder += "\n(Enable update check to fetch)";
+		placeholder += QLatin1String("\n(Enable update check to fetch)");
 	}
 	m_text->setPlaceholderText(placeholder);
 
@@ -73,14 +73,14 @@ void QtNewsWidget::updateNews()
 	std::string newsRaw = appSettings->getUpdateNews();
 	if (!newsRaw.size())
 	{
-		setNews("");
+		setNews(QLatin1String(""));
 		return;
 	}
 
 	if (TimeStamp::now().deltaHours(appSettings->getLastUpdateCheck()) >= 120)
 	{
 		LOG_INFO_STREAM(<< "Ignore news string, because older than 5 days.");
-		setNews("");
+		setNews(QLatin1String(""));
 		return;
 	}
 
@@ -93,7 +93,7 @@ void QtNewsWidget::updateNews()
 		LOG_ERROR_STREAM(
 			<< "News string couldn't be parsed as JSON: " << error.errorString().toStdString()
 			<< "\nJSON: " << newsRaw);
-		setNews("");
+		setNews(QLatin1String(""));
 		return;
 	}
 
@@ -108,25 +108,25 @@ void QtNewsWidget::updateNews()
 		itemNum++;
 		QJsonObject newsItem = value.toObject();
 
-		int version = newsItem.value("version").toInt();
+		int version = newsItem.value(QStringLiteral("version")).toInt();
 		if (version > supportedNewsItemVersion)
 		{
 			LOG_INFO_STREAM(<< "News item " << itemNum << " version " << version << " is not supported.");
 			continue;
 		}
 
-		if (!checkConditions(newsItem.value("conditions").toObject()))
+		if (!checkConditions(newsItem.value(QStringLiteral("conditions")).toObject()))
 		{
 			LOG_INFO_STREAM(<< "News item " << itemNum << " conditions failed.");
 			continue;
 		}
 
-		processFlags(newsItem.value("flags").toObject());
-		setNews(newsItem.value("content").toString());
+		processFlags(newsItem.value(QStringLiteral("flags")).toObject());
+		setNews(newsItem.value(QStringLiteral("content")).toString());
 		return;
 	}
 
-	setNews("");
+	setNews(QLatin1String(""));
 }
 
 void QtNewsWidget::resetFlags()
@@ -155,7 +155,7 @@ bool QtNewsWidget::checkConditions(const QJsonObject& conditions) const
 
 	// min_version
 	{
-		QString minVersionString = conditions.value("min_version").toString();
+		QString minVersionString = conditions.value(QStringLiteral("min_version")).toString();
 		if (!minVersionString.isEmpty())
 		{
 			Version minVersion = Version::fromString(minVersionString.toStdString());
@@ -169,7 +169,7 @@ bool QtNewsWidget::checkConditions(const QJsonObject& conditions) const
 
 	// max_version
 	{
-		QString maxVersionString = conditions.value("max_version").toString();
+		QString maxVersionString = conditions.value(QStringLiteral("max_version")).toString();
 		if (!maxVersionString.isEmpty())
 		{
 			Version maxVersion = Version::fromString(maxVersionString.toStdString());
@@ -183,7 +183,7 @@ bool QtNewsWidget::checkConditions(const QJsonObject& conditions) const
 
 	// OS
 	{
-		QJsonArray osStrings = conditions.value("os").toArray();
+		QJsonArray osStrings = conditions.value(QStringLiteral("os")).toArray();
 		if (!osStrings.isEmpty())
 		{
 			QString osString = QString::fromStdString(utility::getOsTypeString());
@@ -197,7 +197,7 @@ bool QtNewsWidget::checkConditions(const QJsonObject& conditions) const
 
 	// weekday
 	{
-		QJsonArray weekdayStrings = conditions.value("weekday").toArray();
+		QJsonArray weekdayStrings = conditions.value(QStringLiteral("weekday")).toArray();
 		if (!weekdayStrings.isEmpty())
 		{
 			QString weekdayString = QString::fromStdString(TimeStamp::now().dayOfWeekShort());
@@ -221,7 +221,7 @@ void QtNewsWidget::processFlags(const QJsonObject& flags)
 
 	// important
 	{
-		bool important = flags.value("important").toBool();
+		bool important = flags.value(QStringLiteral("important")).toBool();
 		if (important)
 		{
 			LOG_INFO_STREAM(<< "Flag important enabled.");

src/lib_gui/qt/element/dialog/QtPathListBox.cpp

@@ -11,9 +11,9 @@
 QtPathListBox::QtPathListBox(QWidget* parent, const QString& listName, SelectionPolicyType selectionPolicy)
 	: QtListBox(parent, listName), m_selectionPolicy(selectionPolicy)
 {
-	QLabel* dropInfoText = new QLabel("Drop Files & Folders");
+	QLabel* dropInfoText = new QLabel(QStringLiteral("Drop Files & Folders"));
 	dropInfoText->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
-	dropInfoText->setObjectName("dropInfo");
+	dropInfoText->setObjectName(QStringLiteral("dropInfo"));
 	dropInfoText->setAlignment(Qt::AlignRight);
 
 	addWidgetToBar(dropInfoText);

src/lib_gui/qt/element/dialog/QtPathListBoxItem.cpp

@@ -17,7 +17,7 @@ QtPathListBoxItem::QtPathListBoxItem(QtPathListBox* listBox, QListWidgetItem* it
 		ResourcePaths::getGuiPath().concatenate(L"window/dots.png"),
 		ResourcePaths::getGuiPath().concatenate(L"window/dots_hover.png"));
 	m_button->setIconSize(QSize(16, 16));
-	m_button->setObjectName("dotsButton");
+	m_button->setObjectName(QStringLiteral("dotsButton"));
 	layout()->addWidget(m_button);
 
 	connect(m_button, &QPushButton::clicked, this, &QtPathListBoxItem::handleButtonPress);
@@ -37,10 +37,10 @@ void QtPathListBoxItem::handleButtonPress()
 	switch (m_listBox->getSelectionPolicy())
 	{
 	case QtPathListBox::SELECTION_POLICY_FILES_ONLY:
-		list.append(QtFileDialog::getOpenFileName(this, "Select Directory", path, ""));
+		list.append(QtFileDialog::getOpenFileName(this, QStringLiteral("Select Directory"), path, QLatin1String("")));
 		break;
 	case QtPathListBox::SELECTION_POLICY_DIRECTORIES_ONLY:
-		list.append(QtFileDialog::getExistingDirectory(this, "Select Directory", path));
+		list.append(QtFileDialog::getExistingDirectory(this, QStringLiteral("Select Directory"), path));
 		break;
 	case QtPathListBox::SELECTION_POLICY_FILES_AND_DIRECTORIES:
 		list = QtFileDialog::getFileNamesAndDirectories(this, path);

src/lib_gui/qt/element/dialog/QtTextEdit.cpp

@@ -2,7 +2,7 @@
 
 QtTextEdit::QtTextEdit(QWidget* parent): QTextBrowser(parent)
 {
-	document()->setDefaultStyleSheet("a { color: #007AC2; }");
+	document()->setDefaultStyleSheet(QStringLiteral("a { color: #007AC2; }"));
 }
 
 void QtTextEdit::setViewportMargins(int left, int top, int right, int bottom)

src/lib_gui/qt/element/dialog/QtUpdateCheckerWidget.cpp

@@ -19,8 +19,8 @@ QtUpdateCheckerWidget::QtUpdateCheckerWidget(QWidget* parent)
 	layout->setContentsMargins(0, 0, 0, 0);
 	layout->setSpacing(0);
 
-	m_button = new QPushButton("check for new version");
-	m_button->setObjectName("updateButton");
+	m_button = new QPushButton(QStringLiteral("check for new version"));
+	m_button->setObjectName(QStringLiteral("updateButton"));
 	m_button->setCursor(Qt::PointingHandCursor);
 	layout->addWidget(m_button);
 
@@ -28,7 +28,7 @@ QtUpdateCheckerWidget::QtUpdateCheckerWidget(QWidget* parent)
 	{
 		if (QtUpdateChecker::needsAutomaticCheck())
 		{
-			m_button->setText("checking for update...");
+			m_button->setText(QStringLiteral("checking for update..."));
 			m_button->setEnabled(false);
 
 			std::shared_ptr<bool> deleteCheck = m_deleteCheck;
@@ -52,7 +52,7 @@ QtUpdateCheckerWidget::QtUpdateCheckerWidget(QWidget* parent)
 			}
 			else
 			{
-				m_button->setText("up-to-date");
+				m_button->setText(QStringLiteral("up-to-date"));
 				m_button->setEnabled(false);
 			}
 		}
@@ -70,7 +70,7 @@ QtUpdateCheckerWidget::~QtUpdateCheckerWidget()
 
 void QtUpdateCheckerWidget::checkUpdate(bool force)
 {
-	m_button->setText("checking for update...");
+	m_button->setText(QStringLiteral("checking for update..."));
 	m_button->setEnabled(false);
 
 	std::shared_ptr<bool> deleteCheck = m_deleteCheck;
@@ -83,11 +83,11 @@ void QtUpdateCheckerWidget::checkUpdate(bool force)
 
 		if (!result.success)
 		{
-			m_button->setText("update check failed");
+			m_button->setText(QStringLiteral("update check failed"));
 		}
 		else if (result.url.isEmpty())
 		{
-			m_button->setText("up-to-date");
+			m_button->setText(QStringLiteral("up-to-date"));
 		}
 		else
 		{
@@ -100,7 +100,7 @@ void QtUpdateCheckerWidget::checkUpdate(bool force)
 
 void QtUpdateCheckerWidget::setDownloadUrl(QString url)
 {
-	m_button->setText("new version available");
+	m_button->setText(QStringLiteral("new version available"));
 	m_button->disconnect();
 	connect(m_button, &QPushButton::clicked, this, [url]() {
 		QDesktopServices::openUrl(QUrl(url, QUrl::TolerantMode));

src/lib_gui/qt/element/history/QtHistoryList.cpp

@@ -29,7 +29,8 @@ QtHistoryItem::QtHistoryItem(const SearchMatch& match, size_t index, bool isCurr
 	m_name = new QLabel(QString::fromStdWString(name), this);
 	m_name->setAttribute(Qt::WA_MacShowFocusRect, 0);
 	m_name->setAttribute(Qt::WA_LayoutUsesWidgetRect);	  // fixes layouting on Mac
-	m_name->setObjectName(isCurrent ? "history_item_current" : "history_item");
+	m_name->setObjectName(isCurrent ?
+							  QStringLiteral("history_item_current") : QStringLiteral("history_item"));
 	m_name->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
 
 	layout->addWidget(m_name);
@@ -95,7 +96,7 @@ void QtHistoryItem::enterEvent(QEvent* event)
 	css << "QWidget { background-color:" << m_indicatorHoverColor << ";}";
 	m_indicator->setStyleSheet(css.str().c_str());
 
-	if (m_name->objectName() != "history_item")
+	if (m_name->objectName() != QLatin1String("history_item"))
 	{
 		return;
 	}
@@ -113,7 +114,7 @@ void QtHistoryItem::leaveEvent(QEvent* event)
 	css << "QWidget { background-color:" << m_indicatorColor << ";}";
 	m_indicator->setStyleSheet(css.str().c_str());
 
-	if (m_name->objectName() != "history_item")
+	if (m_name->objectName() != QLatin1String("history_item"))
 	{
 		return;
 	}
@@ -146,10 +147,10 @@ QtHistoryList::QtHistoryList(const std::vector<SearchMatch>& history, size_t cur
 	: m_currentIndex(currentIndex)
 {
 	setWindowFlags(Qt::Popup);
-	setObjectName("history");
+	setObjectName(QStringLiteral("history"));
 
 	m_list = new QtHistoryListWidget(this);
-	m_list->setObjectName("history_list");
+	m_list->setObjectName(QStringLiteral("history_list"));
 	m_list->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
 	m_list->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 

src/lib_gui/qt/element/history/QtUndoRedo.cpp

@@ -14,24 +14,24 @@
 QtUndoRedo::QtUndoRedo()
 	: m_pressed(false), m_historyList(nullptr), m_historyHiddenAt(TimeStamp::now())
 {
-	setObjectName("undo_redo_bar");
+	setObjectName(QStringLiteral("undo_redo_bar"));
 
 	m_undoButton = new QtSearchBarButton(
 		ResourcePaths::getGuiPath().concatenate(L"undoredo_view/images/arrow_left.png"));
-	m_undoButton->setObjectName("undo_button");
-	m_undoButton->setToolTip("back");
+	m_undoButton->setObjectName(QStringLiteral("undo_button"));
+	m_undoButton->setToolTip(QStringLiteral("back"));
 	m_undoButton->setEnabled(false);
 
 	m_historyButton = new QtSearchBarButton(
 		ResourcePaths::getGuiPath().concatenate(L"undoredo_view/images/history.png"));
-	m_historyButton->setObjectName("history_button");
-	m_historyButton->setToolTip("history");
+	m_historyButton->setObjectName(QStringLiteral("history_button"));
+	m_historyButton->setToolTip(QStringLiteral("history"));
 	m_historyButton->setEnabled(false);
 
 	m_redoButton = new QtSearchBarButton(
 		ResourcePaths::getGuiPath().concatenate(L"undoredo_view/images/arrow_right.png"));
-	m_redoButton->setObjectName("redo_button");
-	m_redoButton->setToolTip("forward");
+	m_redoButton->setObjectName(QStringLiteral("redo_button"));
+	m_redoButton->setToolTip(QStringLiteral("forward"));
 	m_redoButton->setEnabled(false);
 
 	QBoxLayout* layout = new QHBoxLayout();

src/lib_gui/qt/element/search/QtAutocompletionList.cpp

@@ -145,7 +145,7 @@ void QtAutocompletionDelegate::paint(
 	QColor fillColor(0xFF, 0xFF, 0xFF);
 	QColor textColor(0, 0, 0);
 
-	if (type.size() && type != "command" && type != "filter")
+	if (type.size() && type != QLatin1String("command") && type != QLatin1String("filter"))
 	{
 		const GraphViewStyle::NodeColor& nodeColor = GraphViewStyle::getNodeColor(
 			nodeType.getUnderscoredTypeString(), false);
@@ -177,7 +177,7 @@ void QtAutocompletionDelegate::paint(
 	painter->fillRect(option.rect, backgroundColor);
 
 	// draw highlights at indices
-	QString highlightText(text.size(), ' ');
+	QString highlightText(text.size(), QChar(' '));
 	if (!indices.empty())
 	{
 		for (int i = 0; i < indices.size(); i++)
@@ -196,7 +196,7 @@ void QtAutocompletionDelegate::paint(
 			painter->fillRect(rect, fillColor);
 
 			highlightText[idx] = text.at(idx);
-			text[idx] = ' ';
+			text[idx] = QChar(' ');
 		}
 	}
 	else
@@ -228,7 +228,7 @@ void QtAutocompletionDelegate::paint(
 
 		painter->setFont(m_font2);
 
-		QString highlightSubtext(subtext.size(), ' ');
+		QString highlightSubtext(subtext.size(), QChar(' '));
 		if (indices.size())
 		{
 			for (int i = 0; i < indices.size(); i++)
@@ -247,7 +247,7 @@ void QtAutocompletionDelegate::paint(
 				painter->fillRect(rect, fillColor);
 
 				highlightSubtext[idx] = subtext.at(idx);
-				subtext[idx] = ' ';
+				subtext[idx] = QChar(' ');
 			}
 		}
 
@@ -317,7 +317,7 @@ void QtAutocompletionDelegate::calculateCharSizes(QFont font)
 	m_font1 = font;
 
 	QFontMetrics metrics1(font);
-	m_charWidth1 = metrics1.width(
+	m_charWidth1 = metrics1.width(QStringLiteral(
 					   "---------------------------------------------------------------------------"
 					   "-------------------------"
 					   "---------------------------------------------------------------------------"
@@ -327,7 +327,7 @@ void QtAutocompletionDelegate::calculateCharSizes(QFont font)
 					   "---------------------------------------------------------------------------"
 					   "-------------------------"
 					   "---------------------------------------------------------------------------"
-					   "-------------------------") /
+					   "-------------------------")) /
 		500.0f;
 	m_charHeight1 = metrics1.height();
 
@@ -335,7 +335,7 @@ void QtAutocompletionDelegate::calculateCharSizes(QFont font)
 	m_font2 = font;
 
 	QFontMetrics metrics2(font);
-	m_charWidth2 = metrics2.width(
+	m_charWidth2 = metrics2.width(QStringLiteral(
 					   "---------------------------------------------------------------------------"
 					   "-------------------------"
 					   "---------------------------------------------------------------------------"
@@ -345,7 +345,7 @@ void QtAutocompletionDelegate::calculateCharSizes(QFont font)
 					   "---------------------------------------------------------------------------"
 					   "-------------------------"
 					   "---------------------------------------------------------------------------"
-					   "-------------------------") /
+					   "-------------------------")) /
 		500.0f;
 	m_charHeight2 = metrics2.height();
 
@@ -370,7 +370,7 @@ QtAutocompletionList::QtAutocompletionList(QWidget* parent): QCompleter(parent)
 
 	QListView* list = new QListView(parent);
 	list->setItemDelegateForColumn(0, m_delegate.get());
-	list->setObjectName("search_box_popup");
+	list->setObjectName(QStringLiteral("search_box_popup"));
 	list->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding);
 	list->setUniformItemSizes(true);
 	setPopup(list);
@@ -378,7 +378,7 @@ QtAutocompletionList::QtAutocompletionList(QWidget* parent): QCompleter(parent)
 	setCaseSensitivity(Qt::CaseInsensitive);
 	setCompletionMode(QCompleter::UnfilteredPopupCompletion);
 	setModelSorting(QCompleter::UnsortedModel);
-	setCompletionPrefix("");
+	setCompletionPrefix(QLatin1String(""));
 	setMaxVisibleItems(8);
 }
 

src/lib_gui/qt/element/search/QtScreenSearchBox.cpp

@@ -32,7 +32,7 @@ QtScreenSearchBox::QtScreenSearchBox(
 	ControllerProxy<ScreenSearchController>* controllerProxy, QWidget* parent)
 	: QFrame(parent), m_controllerProxy(controllerProxy)
 {
-	setObjectName("screen_search_box");
+	setObjectName(QStringLiteral("screen_search_box"));
 
 	QHBoxLayout* layout = new QHBoxLayout();
 	layout->setContentsMargins(0, 0, 0, 0);
@@ -42,17 +42,17 @@ QtScreenSearchBox::QtScreenSearchBox(
 	// search field
 	{
 		m_searchButton = new QtSelfRefreshIconButton(
-			"",
+			QLatin1String(""),
 			ResourcePaths::getGuiPath().concatenate(L"search_view/images/search.png"),
 			"screen_search/button");
-		m_searchButton->setObjectName("search_button");
+		m_searchButton->setObjectName(QStringLiteral("search_button"));
 		m_searchButton->setIconSize(QSize(12, 12));
 		layout->addWidget(m_searchButton);
 
 		connect(m_searchButton, &QPushButton::clicked, this, &QtScreenSearchBox::setFocus);
 
 		m_searchBox = new QLineEdit(this);
-		m_searchBox->setObjectName("search_box");
+		m_searchBox->setObjectName(QStringLiteral("search_box"));
 		m_searchBox->setAttribute(Qt::WA_MacShowFocusRect, 0);	  // remove blue focus box on Mac
 		layout->addWidget(m_searchBox);
 
@@ -68,7 +68,7 @@ QtScreenSearchBox::QtScreenSearchBox(
 	{
 		m_matchLabel = new QPushButton();
 		m_matchLabel->setAttribute(Qt::WA_LayoutUsesWidgetRect);	// fixes layouting on Mac
-		m_matchLabel->setObjectName("match_label");
+		m_matchLabel->setObjectName(QStringLiteral("match_label"));
 		layout->addWidget(m_matchLabel);
 
 		connect(m_matchLabel, &QPushButton::clicked, this, &QtScreenSearchBox::setFocus);
@@ -77,16 +77,16 @@ QtScreenSearchBox::QtScreenSearchBox(
 	// buttons
 	{
 		m_prevButton = new QtSelfRefreshIconButton(
-			"",
+			QLatin1String(""),
 			ResourcePaths::getGuiPath().concatenate(L"code_view/images/arrow_left.png"),
 			"screen_search/button");
 		m_nextButton = new QtSelfRefreshIconButton(
-			"",
+			QLatin1String(""),
 			ResourcePaths::getGuiPath().concatenate(L"code_view/images/arrow_right.png"),
 			"screen_search/button");
 
-		m_prevButton->setObjectName("prev_button");
-		m_nextButton->setObjectName("next_button");
+		m_prevButton->setObjectName(QStringLiteral("prev_button"));
+		m_nextButton->setObjectName(QStringLiteral("next_button"));
 
 		m_prevButton->setIconSize(QSize(12, 12));
 		m_nextButton->setIconSize(QSize(12, 12));
@@ -108,10 +108,10 @@ QtScreenSearchBox::QtScreenSearchBox(
 	// buttons
 	{
 		m_closeButton = new QtSelfRefreshIconButton(
-			"",
+			QLatin1String(""),
 			ResourcePaths::getGuiPath().concatenate(L"screen_search_view/images/close.png"),
 			"screen_search/button");
-		m_closeButton->setObjectName("close_button");
+		m_closeButton->setObjectName(QStringLiteral("close_button"));
 		m_closeButton->setIconSize(QSize(15, 15));
 		layout->addWidget(m_closeButton);
 
@@ -151,7 +151,7 @@ void QtScreenSearchBox::addResponder(const std::string& name)
 	}
 
 	QCheckBox* box = new QCheckBox(name.c_str());
-	box->setObjectName("filter_checkbox");
+	box->setObjectName(QStringLiteral("filter_checkbox"));
 	box->setChecked(true);
 	m_checkBoxes.emplace(name, box);
 	m_checkboxLayout->addWidget(box);
@@ -231,7 +231,7 @@ void QtScreenSearchBox::updateMatchLabel()
 	text += QString::number(m_matchCount) + " match";
 	if (m_matchCount != 1)
 	{
-		text += "es";
+		text += QLatin1String("es");
 	}
 
 	m_matchLabel->setText(text);

src/lib_gui/qt/element/search/QtSearchBar.cpp

@@ -12,7 +12,7 @@
 
 QtSearchBar::QtSearchBar()
 {
-	setObjectName("search_bar");
+	setObjectName(QStringLiteral("search_bar"));
 
 	QBoxLayout* layout = new QHBoxLayout();
 	layout->setSpacing(0);
@@ -22,13 +22,13 @@ QtSearchBar::QtSearchBar()
 
 	m_homeButton = new QtSearchBarButton(
 		ResourcePaths::getGuiPath().concatenate(L"search_view/images/home.png"));
-	m_homeButton->setObjectName("home_button");
-	m_homeButton->setToolTip("to overview");
+	m_homeButton->setObjectName(QStringLiteral("home_button"));
+	m_homeButton->setToolTip(QStringLiteral("to overview"));
 	layout->addWidget(m_homeButton);
 	connect(m_homeButton, &QPushButton::clicked, this, &QtSearchBar::homeButtonClicked);
 
 	m_searchBoxContainer = new QWidget(this);
-	m_searchBoxContainer->setObjectName("search_box_container");
+	m_searchBoxContainer->setObjectName(QStringLiteral("search_box_container"));
 	m_searchBoxContainer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Minimum);
 	layout->addWidget(m_searchBoxContainer);
 
@@ -36,7 +36,7 @@ QtSearchBar::QtSearchBar()
 	innerLayout->setContentsMargins(12, 3, 5, 2);
 	m_searchBoxContainer->setLayout(innerLayout);
 
-	m_searchBox = new QtSmartSearchBox("Search", true, m_searchBoxContainer);
+	m_searchBox = new QtSmartSearchBox(QStringLiteral("Search"), true, m_searchBoxContainer);
 	m_searchBox->setMinimumWidth(100);
 	m_searchBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Minimum);
 	innerLayout->addWidget(m_searchBox);
@@ -48,8 +48,8 @@ QtSearchBar::QtSearchBar()
 
 	m_searchButton = new QtSearchBarButton(
 		ResourcePaths::getGuiPath().concatenate(L"search_view/images/search.png"));
-	m_searchButton->setObjectName("search_button");
-	m_searchButton->setToolTip("search");
+	m_searchButton->setObjectName(QStringLiteral("search_button"));
+	m_searchButton->setToolTip(QStringLiteral("search"));
 	layout->addWidget(m_searchButton);
 
 	connect(m_searchButton, &QPushButton::clicked, m_searchBox, &QtSmartSearchBox::startSearch);

src/lib_gui/qt/element/search/QtSearchBarButton.cpp

@@ -3,7 +3,7 @@
 #include "ApplicationSettings.h"
 
 QtSearchBarButton::QtSearchBarButton(const FilePath& iconPath, bool small, QWidget* parent)
-	: QtSelfRefreshIconButton("", iconPath, "search/button", parent), m_small(small)
+	: QtSelfRefreshIconButton(QLatin1String(""), iconPath, "search/button", parent), m_small(small)
 {
 	refresh();
 }

src/lib_gui/qt/element/search/QtSmartSearchBox.cpp

@@ -78,12 +78,12 @@ QtSmartSearchBox::QtSmartSearchBox(const QString& placeholder, bool supportsFull
 	, m_mousePressed(false)
 	, m_ignoreNextMousePress(false)
 {
-	setObjectName("search_box");
+	setObjectName(QStringLiteral("search_box"));
 	setAttribute(Qt::WA_MacShowFocusRect, 0);	 // remove blue focus box on Mac
 
 	m_highlightRect = new QWidget(this);
 	m_highlightRect->setGeometry(0, 0, 0, 0);
-	m_highlightRect->setObjectName("search_box_highlight");
+	m_highlightRect->setObjectName(QStringLiteral("search_box_highlight"));
 
 	connect(this, &QtSmartSearchBox::textEdited, this, &QtSmartSearchBox::onTextEdited);
 	connect(this, &QtSmartSearchBox::textChanged, this, &QtSmartSearchBox::onTextChanged);
@@ -232,7 +232,7 @@ void QtSmartSearchBox::focusInEvent(QFocusEvent* event)
 
 	if (text().size() == 1 && text().startsWith(SearchMatch::FULLTEXT_SEARCH_CHARACTER))
 	{
-		setEditText("");
+		setEditText(QLatin1String(""));
 	}
 	else
 	{
@@ -1044,13 +1044,13 @@ void QtSmartSearchBox::updatePlaceholder()
 	}
 	else
 	{
-		setPlaceholderText("");
+		setPlaceholderText(QLatin1String(""));
 	}
 }
 
 void QtSmartSearchBox::clearLineEdit()
 {
-	setEditText("");
+	setEditText(QLatin1String(""));
 	hideAutoCompletions();
 }
 

src/lib_gui/qt/graphics/base/QtGraphicsView.cpp

@@ -42,7 +42,7 @@ QtGraphicsView::QtGraphicsView(QWidget* parent)
 	, m_zoomInButtonSpeed(20.0f)
 	, m_zoomOutButtonSpeed(-20.0f)
 {
-	QString modifierName = utility::getOsType() == OS_MAC ? "Cmd" : "Ctrl";
+	QString modifierName = utility::getOsType() == OS_MAC ? QStringLiteral("Cmd") : QStringLiteral("Ctrl");
 
 	setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
 
@@ -56,93 +56,93 @@ QtGraphicsView::QtGraphicsView(QWidget* parent)
 	m_zoomLabelTimer = std::make_shared<QTimer>(this);
 	connect(m_zoomLabelTimer.get(), &QTimer::timeout, this, &QtGraphicsView::hideZoomLabel);
 
-	m_openInTabAction = new QAction("Open in New Tab", this);
-	m_openInTabAction->setStatusTip("Open this node in a new tab");
-	m_openInTabAction->setToolTip("Open this node in a new tab");
+	m_openInTabAction = new QAction(QStringLiteral("Open in New Tab"), this);
+	m_openInTabAction->setStatusTip(QStringLiteral("Open this node in a new tab"));
+	m_openInTabAction->setToolTip(QStringLiteral("Open this node in a new tab"));
 	connect(m_openInTabAction, &QAction::triggered, this, &QtGraphicsView::openInTab);
 
-	m_copyNodeNameAction = new QAction("Copy Name", this);
-	m_copyNodeNameAction->setStatusTip("Copies the name of this node to the clipboard");
-	m_copyNodeNameAction->setToolTip("Copies the name of this node to the clipboard");
+	m_copyNodeNameAction = new QAction(QStringLiteral("Copy Name"), this);
+	m_copyNodeNameAction->setStatusTip(QStringLiteral("Copies the name of this node to the clipboard"));
+	m_copyNodeNameAction->setToolTip(QStringLiteral("Copies the name of this node to the clipboard"));
 	connect(m_copyNodeNameAction, &QAction::triggered, this, &QtGraphicsView::copyNodeName);
 
-	m_collapseAction = new QAction("Collapse Node (Shift + Left Click)", this);
-	m_collapseAction->setStatusTip("Hide the unconnected members of the node");
-	m_collapseAction->setToolTip("Hide the unconnected members of the node");
+	m_collapseAction = new QAction(QStringLiteral("Collapse Node (Shift + Left Click)"), this);
+	m_collapseAction->setStatusTip(QStringLiteral("Hide the unconnected members of the node"));
+	m_collapseAction->setToolTip(QStringLiteral("Hide the unconnected members of the node"));
 	connect(m_collapseAction, &QAction::triggered, this, &QtGraphicsView::collapseNode);
 
-	m_expandAction = new QAction("Expand Node (Shift + Left Click)", this);
-	m_expandAction->setStatusTip("Show unconnected members of the node");
-	m_expandAction->setToolTip("Show unconnected members of the node");
+	m_expandAction = new QAction(QStringLiteral("Expand Node (Shift + Left Click)"), this);
+	m_expandAction->setStatusTip(QStringLiteral("Show unconnected members of the node"));
+	m_expandAction->setToolTip(QStringLiteral("Show unconnected members of the node"));
 	connect(m_expandAction, &QAction::triggered, this, &QtGraphicsView::expandNode);
 
-	m_showInIDEAction = new QAction("Show Definition in IDE (Ctrl + Left Click)", this);
+	m_showInIDEAction = new QAction(QStringLiteral("Show Definition in IDE (Ctrl + Left Click)"), this);
 #if defined(Q_OS_MAC)
 	m_showInIDEAction->setText("Show Definition in IDE (Cmd + Left Click)");
 #endif
-	m_showInIDEAction->setStatusTip("Show definition of this symbol in the IDE (via plug-in)");
-	m_showInIDEAction->setToolTip("Show definition of this symbol in the IDE (via plug-in)");
+	m_showInIDEAction->setStatusTip(QStringLiteral("Show definition of this symbol in the IDE (via plug-in)"));
+	m_showInIDEAction->setToolTip(QStringLiteral("Show definition of this symbol in the IDE (via plug-in)"));
 	connect(m_showInIDEAction, &QAction::triggered, this, &QtGraphicsView::showInIDE);
 
-	m_showDefinitionAction = new QAction("Show Definition (Ctrl + Alt + Left Click)", this);
+	m_showDefinitionAction = new QAction(QStringLiteral("Show Definition (Ctrl + Alt + Left Click)"), this);
 #if defined(Q_OS_MAC)
 	m_showDefinitionAction->setText("Show Definition (Cmd + Alt + Left Click)");
 #endif
-	m_showDefinitionAction->setStatusTip("Show definition of this symbol in the code");
-	m_showDefinitionAction->setToolTip("Show definition of this symbol in the code");
+	m_showDefinitionAction->setStatusTip(QStringLiteral("Show definition of this symbol in the code"));
+	m_showDefinitionAction->setToolTip(QStringLiteral("Show definition of this symbol in the code"));
 	connect(m_showDefinitionAction, &QAction::triggered, this, &QtGraphicsView::showDefinition);
 
-	m_hideNodeAction = new QAction("Hide Node (Alt + Left Click)", this);
-	m_hideNodeAction->setStatusTip("Hide the node from this graph");
-	m_hideNodeAction->setToolTip("Hide the node from this graph");
+	m_hideNodeAction = new QAction(QStringLiteral("Hide Node (Alt + Left Click)"), this);
+	m_hideNodeAction->setStatusTip(QStringLiteral("Hide the node from this graph"));
+	m_hideNodeAction->setToolTip(QStringLiteral("Hide the node from this graph"));
 	connect(m_hideNodeAction, &QAction::triggered, this, &QtGraphicsView::hideNode);
 
-	m_hideEdgeAction = new QAction("Hide Edge (Alt + Left Click)", this);
-	m_hideEdgeAction->setStatusTip("Hide the edge from this graph");
-	m_hideEdgeAction->setToolTip("Hide the edge from this graph");
+	m_hideEdgeAction = new QAction(QStringLiteral("Hide Edge (Alt + Left Click)"), this);
+	m_hideEdgeAction->setStatusTip(QStringLiteral("Hide the edge from this graph"));
+	m_hideEdgeAction->setToolTip(QStringLiteral("Hide the edge from this graph"));
 	connect(m_hideEdgeAction, &QAction::triggered, this, &QtGraphicsView::hideEdge);
 
-	m_bookmarkNodeAction = new QAction("Bookmark Node", this);
-	m_bookmarkNodeAction->setStatusTip("Create a bookmark for this node");
-	m_bookmarkNodeAction->setToolTip("Create a bookmark for this node");
+	m_bookmarkNodeAction = new QAction(QStringLiteral("Bookmark Node"), this);
+	m_bookmarkNodeAction->setStatusTip(QStringLiteral("Create a bookmark for this node"));
+	m_bookmarkNodeAction->setToolTip(QStringLiteral("Create a bookmark for this node"));
 	connect(m_bookmarkNodeAction, &QAction::triggered, this, &QtGraphicsView::bookmarkNode);
 
-	m_exportGraphAction = new QAction("Save as Image", this);
-	m_exportGraphAction->setStatusTip("Save this graph as image file");
-	m_exportGraphAction->setToolTip("Save this graph as image file");
+	m_exportGraphAction = new QAction(QStringLiteral("Save as Image"), this);
+	m_exportGraphAction->setStatusTip(QStringLiteral("Save this graph as image file"));
+	m_exportGraphAction->setToolTip(QStringLiteral("Save this graph as image file"));
 	connect(m_exportGraphAction, &QAction::triggered, this, &QtGraphicsView::exportGraph);
 
 	m_zoomState = new QPushButton(this);
-	m_zoomState->setObjectName("zoom_state");
+	m_zoomState->setObjectName(QStringLiteral("zoom_state"));
 	m_zoomState->hide();
 
 	m_zoomInButton = new QtSelfRefreshIconButton(
-		"",
+		QLatin1String(""),
 		ResourcePaths::getGuiPath().concatenate(L"graph_view/images/zoom_in.png"),
 		"search/button",
 		this);
-	m_zoomInButton->setObjectName("zoom_in_button");
+	m_zoomInButton->setObjectName(QStringLiteral("zoom_in_button"));
 	m_zoomInButton->setAutoRepeat(true);
 	m_zoomInButton->setToolTip("zoom in (" + modifierName + " + Mousewheel forward)");
 	connect(m_zoomInButton, &QPushButton::pressed, this, &QtGraphicsView::zoomInPressed);
 
 	m_zoomOutButton = new QtSelfRefreshIconButton(
-		"",
+		QLatin1String(""),
 		ResourcePaths::getGuiPath().concatenate(L"graph_view/images/zoom_out.png"),
 		"search/button",
 		this);
-	m_zoomOutButton->setObjectName("zoom_out_button");
+	m_zoomOutButton->setObjectName(QStringLiteral("zoom_out_button"));
 	m_zoomOutButton->setAutoRepeat(true);
 	m_zoomOutButton->setToolTip("zoom out (" + modifierName + " + Mousewheel back)");
 	connect(m_zoomOutButton, &QPushButton::pressed, this, &QtGraphicsView::zoomOutPressed);
 
 	m_legendButton = new QtSelfRefreshIconButton(
-		"",
+		QLatin1String(""),
 		ResourcePaths::getGuiPath().concatenate(L"graph_view/images/legend.png"),
 		"search/button",
 		this);
-	m_legendButton->setObjectName("legend_button");
-	m_legendButton->setToolTip("show legend");
+	m_legendButton->setObjectName(QStringLiteral("legend_button"));
+	m_legendButton->setToolTip(QStringLiteral("show legend"));
 	connect(m_legendButton, &QPushButton::clicked, this, &QtGraphicsView::legendClicked);
 }
 
@@ -553,14 +553,14 @@ void QtGraphicsView::openInTab()
 
 void QtGraphicsView::exportGraph()
 {
-	const QString exportNotice = "Exported from Sourcetrail";
+	const QString exportNotice = QStringLiteral("Exported from Sourcetrail");
 	const int margin = 10;
 
 	FilePath filePath(QtFileDialog::showSaveFileDialog(
 						  nullptr,
-						  "Save image",
+						  QStringLiteral("Save image"),
 						  FilePath(),
-						  "PNG (*.png);;JPEG (*.JPEG);;BMP Files (*.bmp);;SVG (*.svg)")
+						  QStringLiteral("PNG (*.png);;JPEG (*.JPEG);;BMP Files (*.bmp);;SVG (*.svg)"))
 						  .toStdWString());
 
 
@@ -571,13 +571,13 @@ void QtGraphicsView::exportGraph()
 		svgGen.setSize(scene()->sceneRect().size().toSize());
 		svgGen.setViewBox(QRect(QPoint(0, 0), scene()->sceneRect().size().toSize()));
 		svgGen.setTitle(QString::fromStdWString(filePath.withoutExtension().fileName()));
-		svgGen.setDescription(QString("Graph exported from Sourcetrail") + QChar(0x00AE));
+		svgGen.setDescription(QStringLiteral("Graph exported from Sourcetrail") + QChar(0x00AE));
 
 		QPainter painter(&svgGen);
 		scene()->render(&painter);
 
 		{
-			QFont font("Fira Sans, sans-serif");
+			QFont font(QStringLiteral("Fira Sans, sans-serif"));
 			font.setPixelSize(8);
 			painter.setFont(font);
 		}

src/lib_gui/qt/graphics/graph/QtGraphNode.cpp

@@ -607,7 +607,8 @@ void QtGraphNode::setStyle(const GraphViewStyle::NodeStyle& style)
 		m_matchText->setPos(
 			style.iconOffset.x + style.iconSize + style.textOffset.x, style.textOffset.y);
 
-		float charWidth = QFontMetrics(font).width("QtGraphNode::QtGraphNode::QtGraphNode") / 37.0f;
+		float charWidth = QFontMetrics(font).width(
+							  QStringLiteral("QtGraphNode::QtGraphNode::QtGraphNode")) / 37.0f;
 		float charHeight = QFontMetrics(font).height();
 		m_matchRect->setRect(
 			style.iconOffset.x + style.iconSize + style.textOffset.x + m_matchPos * charWidth,

src/lib_gui/qt/graphics/graph/QtGraphNodeBundle.cpp

@@ -18,7 +18,7 @@ QtGraphNodeBundle::QtGraphNodeBundle(Id tokenId, size_t nodeCount, NodeType type
 
 	this->setAcceptHoverEvents(true);
 
-	this->setToolTip("bundle");
+	this->setToolTip(QStringLiteral("bundle"));
 }
 
 QtGraphNodeBundle::~QtGraphNodeBundle() {}

src/lib_gui/qt/network/QtUpdateChecker.cpp

@@ -37,7 +37,7 @@ void QtUpdateChecker::check(bool force, std::function<void(Result)> callback)
 	appSettings->setUpdateDownloadUrl("");
 	appSettings->save();
 
-	QString urlString = "https://www.sourcetrail.com/api/v2/versions/latest";
+	QString urlString = QStringLiteral("https://www.sourcetrail.com/api/v2/versions/latest");
 
 	// OS
 	std::string osString = utility::getOsTypeString();
@@ -53,7 +53,7 @@ void QtUpdateChecker::check(bool force, std::function<void(Result)> callback)
 	urlString += ("&version=" + Version::getApplicationVersion().toDisplayString()).c_str();
 
 	// license
-	urlString += "&license=free";	 // options: test, private, commercial
+	urlString += QLatin1String("&license=free");	 // options: test, private, commercial
 
 	// user token
 	std::string token = appSettings->getUserToken();
@@ -87,7 +87,7 @@ void QtUpdateChecker::check(bool force, std::function<void(Result)> callback)
 					break;
 				}
 
-				QString news = doc.object().find("news")->toString();
+				QString news = doc.object().find(QStringLiteral("news"))->toString();
 				if (news.toStdString() != appSettings->getUpdateNews())
 				{
 					appSettings->setUpdateNews(news.toStdString());
@@ -95,8 +95,8 @@ void QtUpdateChecker::check(bool force, std::function<void(Result)> callback)
 				}
 
 
-				QString version = doc.object().find("version")->toString();
-				QString url = doc.object().find("url")->toString();
+				QString version = doc.object().find(QStringLiteral("version"))->toString();
+				QString url = doc.object().find(QStringLiteral("url"))->toString();
 
 				Version updateVersion = Version::fromString(version.toStdString());
 				if (!updateVersion.isValid())
@@ -126,13 +126,13 @@ void QtUpdateChecker::check(bool force, std::function<void(Result)> callback)
 					}
 
 					QMessageBox msgBox;
-					msgBox.setText("Update Check");
+					msgBox.setText(QStringLiteral("Update Check"));
 					msgBox.setInformativeText(
 						"Sourcetrail " + version + " is available for download: <a href=\"" + url +
 						"\">" + url + "</a>");
-					msgBox.addButton("Close", QMessageBox::ButtonRole::NoRole);
-					msgBox.addButton("Skip this Version", QMessageBox::ButtonRole::NoRole);
-					QPushButton* but = msgBox.addButton("Download", QMessageBox::ButtonRole::YesRole);
+					msgBox.addButton(QStringLiteral("Close"), QMessageBox::ButtonRole::NoRole);
+					msgBox.addButton(QStringLiteral("Skip this Version"), QMessageBox::ButtonRole::NoRole);
+					QPushButton* but = msgBox.addButton(QStringLiteral("Download"), QMessageBox::ButtonRole::YesRole);
 					msgBox.setDefaultButton(but);
 
 					int val = msgBox.exec();

src/lib_gui/qt/project_wizard/QtProjectWizard.cpp

@@ -633,7 +633,7 @@ void QtProjectWizard::populateWindow(QWidget* widget)
 
 	{
 		QWidget* menu = new QWidget();
-		menu->setObjectName("project_menu");
+		menu->setObjectName(QStringLiteral("project_menu"));
 		menu->setFixedWidth(200);
 		layout->addWidget(menu);
 
@@ -641,13 +641,13 @@ void QtProjectWizard::populateWindow(QWidget* widget)
 		menuLayout->setContentsMargins(0, 0, 0, 0);
 		menuLayout->setSpacing(0);
 
-		m_generalButton = new QPushButton("General");
-		m_generalButton->setObjectName("general_button");
+		m_generalButton = new QPushButton(QStringLiteral("General"));
+		m_generalButton->setObjectName(QStringLiteral("general_button"));
 		m_generalButton->setCheckable(true);
 		connect(m_generalButton, &QPushButton::clicked, this, &QtProjectWizard::generalButtonClicked);
 		menuLayout->addWidget(m_generalButton);
 
-		QLabel* sourceGroupLabel = new QLabel("Source Groups:");
+		QLabel* sourceGroupLabel = new QLabel(QStringLiteral("Source Groups:"));
 		menuLayout->addWidget(sourceGroupLabel);
 
 		m_sourceGroupList = new QListWidget();
@@ -679,13 +679,13 @@ void QtProjectWizard::populateWindow(QWidget* widget)
 		m_removeButton->setIconSize(QSize(20, 20));
 		m_duplicateButton->setIconSize(QSize(20, 20));
 
-		addButton->setToolTip("Add Source Group");
-		m_removeButton->setToolTip("Remove Source Group");
-		m_duplicateButton->setToolTip("Copy Source Group");
+		addButton->setToolTip(QStringLiteral("Add Source Group"));
+		m_removeButton->setToolTip(QStringLiteral("Remove Source Group"));
+		m_duplicateButton->setToolTip(QStringLiteral("Copy Source Group"));
 
-		addButton->setObjectName("action_button");
-		m_removeButton->setObjectName("action_button");
-		m_duplicateButton->setObjectName("action_button");
+		addButton->setObjectName(QStringLiteral("action_button"));
+		m_removeButton->setObjectName(QStringLiteral("action_button"));
+		m_duplicateButton->setObjectName(QStringLiteral("action_button"));
 
 		m_removeButton->setEnabled(false);
 		m_duplicateButton->setEnabled(false);
@@ -718,11 +718,11 @@ void QtProjectWizard::populateWindow(QWidget* widget)
 	layout->addSpacing(10);
 
 	m_contentWidget = new QWidget();
-	m_contentWidget->setObjectName("form");
+	m_contentWidget->setObjectName(QStringLiteral("form"));
 
 	QScrollArea* scrollArea = new QScrollArea();
 	scrollArea->setFrameShadow(QFrame::Plain);
-	scrollArea->setObjectName("formArea");
+	scrollArea->setObjectName(QStringLiteral("formArea"));
 	scrollArea->setWidgetResizable(true);
 
 	scrollArea->setWidget(m_contentWidget);
@@ -735,18 +735,18 @@ void QtProjectWizard::windowReady()
 {
 	if (m_editing)
 	{
-		updateTitle("Edit Project");
-		updateNextButton("Save");
+		updateTitle(QStringLiteral("Edit Project"));
+		updateNextButton(QStringLiteral("Save"));
 	}
 	else
 	{
-		updateTitle("New Project");
-		updateNextButton("Create");
+		updateTitle(QStringLiteral("New Project"));
+		updateNextButton(QStringLiteral("Create"));
 		setNextEnabled(false);
 	}
 
-	updateSubTitle("Overview");
-	updatePreviousButton("Add Source Group");
+	updateSubTitle(QStringLiteral("Overview"));
+	updatePreviousButton(QStringLiteral("Add Source Group"));
 
 	connect(this, &QtProjectWizard::previous, this, &QtProjectWizard::newSourceGroup);
 	connect(this, &QtProjectWizard::next, this, &QtProjectWizard::createProject);
@@ -1021,10 +1021,10 @@ void QtProjectWizard::removeSelectedSourceGroup()
 	}
 
 	QMessageBox msgBox;
-	msgBox.setText("Remove Source Group");
-	msgBox.setInformativeText("Do you really want to remove this source group from the project?");
-	msgBox.addButton("Yes", QMessageBox::ButtonRole::YesRole);
-	msgBox.addButton("No", QMessageBox::ButtonRole::NoRole);
+	msgBox.setText(QStringLiteral("Remove Source Group"));
+	msgBox.setInformativeText(QStringLiteral("Do you really want to remove this source group from the project?"));
+	msgBox.addButton(QStringLiteral("Yes"), QMessageBox::ButtonRole::YesRole);
+	msgBox.addButton(QStringLiteral("No"), QMessageBox::ButtonRole::NoRole);
 	msgBox.setIcon(QMessageBox::Icon::Question);
 	int ret = msgBox.exec();
 
@@ -1162,7 +1162,7 @@ void QtProjectWizard::newSourceGroup()
 	window->show();
 	window->setNextEnabled(false);
 	window->setPreviousEnabled(false);
-	window->updateSubTitle("Type Selection");
+	window->updateSubTitle(QStringLiteral("Type Selection"));
 }
 
 void QtProjectWizard::selectedProjectType(SourceGroupType sourceGroupType)

src/lib_gui/qt/project_wizard/QtProjectWizardWindow.cpp

@@ -80,7 +80,7 @@ void QtProjectWizardWindow::populateWindow(QWidget* widget)
 
 void QtProjectWizardWindow::windowReady()
 {
-	updateTitle("NEW SOURCE GROUP");
+	updateTitle(QStringLiteral("NEW SOURCE GROUP"));
 
 	m_content->windowReady();
 }

src/lib_gui/qt/project_wizard/content/QtProjectWizardContent.cpp

@@ -40,12 +40,12 @@ std::vector<FilePath> QtProjectWizardContent::getFilePaths() const
 
 QString QtProjectWizardContent::getFileNamesTitle() const
 {
-	return "File List";
+	return QStringLiteral("File List");
 }
 
 QString QtProjectWizardContent::getFileNamesDescription() const
 {
-	return "files";
+	return QStringLiteral("files");
 }
 
 bool QtProjectWizardContent::isInForm() const
@@ -62,7 +62,7 @@ QLabel* QtProjectWizardContent::createFormLabel(QString name) const
 {
 	QLabel* label = new QLabel(name);
 	label->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
-	label->setObjectName("label");
+	label->setObjectName(QStringLiteral("label"));
 	label->setWordWrap(true);
 	return label;
 }
@@ -70,7 +70,7 @@ QLabel* QtProjectWizardContent::createFormLabel(QString name) const
 QLabel* QtProjectWizardContent::createFormTitle(QString name) const
 {
 	QLabel* label = new QLabel(name);
-	label->setObjectName("titleLabel");
+	label->setObjectName(QStringLiteral("titleLabel"));
 	label->setWordWrap(true);
 	return label;
 }
@@ -78,7 +78,7 @@ QLabel* QtProjectWizardContent::createFormTitle(QString name) const
 QToolButton* QtProjectWizardContent::createSourceGroupButton(QString name, QString iconPath) const
 {
 	QToolButton* button = new QToolButton();
-	button->setObjectName("sourceGroupButton");
+	button->setObjectName(QStringLiteral("sourceGroupButton"));
 	button->setText(name);
 	button->setIcon(QPixmap(iconPath));
 	button->setIconSize(QSize(64, 64));
@@ -98,7 +98,7 @@ QtHelpButton* QtProjectWizardContent::addHelpButton(
 QPushButton* QtProjectWizardContent::addFilesButton(QString name, QGridLayout* layout, int row) const
 {
 	QPushButton* button = new QPushButton(name);
-	button->setObjectName("windowButton");
+	button->setObjectName(QStringLiteral("windowButton"));
 	button->setAttribute(Qt::WA_LayoutUsesWidgetRect);	  // fixes layouting on Mac
 	if (layout)
 	{

src/lib_gui/qt/project_wizard/content/QtProjectWizardContentCustomCommand.cpp

@@ -24,9 +24,9 @@ void QtProjectWizardContentCustomCommand::populate(QGridLayout* layout, int& row
 		row++;
 	}
 
-	QLabel* nameLabel = createFormLabel("Custom Command");
+	QLabel* nameLabel = createFormLabel(QStringLiteral("Custom Command"));
 	addHelpButton(
-		"Custom Command",
+		QStringLiteral("Custom Command"),
 		"<p>Specify the commandline call that will be executed for each source file in this Source "
 		"Group. "
 		"You can use the following variables, %{SOURCE_FILE_PATH} is mandatory.</p>"
@@ -47,9 +47,9 @@ void QtProjectWizardContentCustomCommand::populate(QGridLayout* layout, int& row
 		row);
 
 	m_customCommand = new QLineEdit();
-	m_customCommand->setObjectName("name");
+	m_customCommand->setObjectName(QStringLiteral("name"));
 	m_customCommand->setAttribute(Qt::WA_MacShowFocusRect, 0);
-	m_runInParallel = new QCheckBox("Run in Parallel");
+	m_runInParallel = new QCheckBox(QStringLiteral("Run in Parallel"));
 
 	layout->setRowMinimumHeight(row, 30);
 
@@ -84,7 +84,7 @@ bool QtProjectWizardContentCustomCommand::check()
 	if (m_customCommand->text().isEmpty())
 	{
 		QMessageBox msgBox;
-		msgBox.setText("Please enter a custom command.");
+		msgBox.setText(QStringLiteral("Please enter a custom command."));
 		msgBox.exec();
 		return false;
 	}
@@ -92,7 +92,7 @@ bool QtProjectWizardContentCustomCommand::check()
 	if (m_customCommand->text().toStdWString().find(L"%{SOURCE_FILE_PATH}") == std::wstring::npos)
 	{
 		QMessageBox msgBox;
-		msgBox.setText("The variable %{SOURCE_FILE_PATH} is missing in the custom command.");
+		msgBox.setText(QStringLiteral("The variable %{SOURCE_FILE_PATH} is missing in the custom command."));
 		msgBox.exec();
 		return false;
 	}

src/lib_gui/qt/project_wizard/content/QtProjectWizardContentExtensions.cpp

@@ -13,12 +13,12 @@ QtProjectWizardContentExtensions::QtProjectWizardContentExtensions(
 
 void QtProjectWizardContentExtensions::populate(QGridLayout* layout, int& row)
 {
-	QLabel* sourceLabel = createFormLabel("Source File Extensions");
+	QLabel* sourceLabel = createFormLabel(QStringLiteral("Source File Extensions"));
 	layout->addWidget(sourceLabel, row, QtProjectWizardWindow::FRONT_COL, Qt::AlignTop);
 
 	addHelpButton(
-		"Source File Extensions",
-		"Define extensions for source files including the dot (e.g. .cpp or .java)",
+		QStringLiteral("Source File Extensions"),
+		QStringLiteral("Define extensions for source files including the dot (e.g. .cpp or .java)"),
 		layout,
 		row);
 

src/lib_gui/qt/project_wizard/content/QtProjectWizardContentPreferences.cpp

@@ -42,13 +42,13 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 	ApplicationSettings* appSettings = ApplicationSettings::getInstance().get();
 
 	// ui
-	addTitle("USER INTERFACE", layout, row);
+	addTitle(QStringLiteral("USER INTERFACE"), layout, row);
 
 	// font face
 	m_fontFacePlaceHolder = new QtComboBoxPlaceHolder();
 	m_fontFace = new QFontComboBox();
 	m_fontFace->setEditable(false);
-	addLabelAndWidget("Font Face", m_fontFacePlaceHolder, layout, row);
+	addLabelAndWidget(QStringLiteral("Font Face"), m_fontFacePlaceHolder, layout, row);
 
 	int rowNum = row;
 	connect(m_fontFacePlaceHolder, &QtComboBoxPlaceHolder::opened, [this, rowNum, layout]() {
@@ -67,20 +67,20 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 
 	// font size
 	m_fontSize = addComboBox(
-		"Font Size", appSettings->getFontSizeMin(), appSettings->getFontSizeMax(), "", layout, row);
+		QStringLiteral("Font Size"), appSettings->getFontSizeMin(), appSettings->getFontSizeMax(), QLatin1String(""), layout, row);
 
 	// tab width
-	m_tabWidth = addComboBox("Tab Width", 1, 16, "", layout, row);
+	m_tabWidth = addComboBox(QStringLiteral("Tab Width"), 1, 16, QLatin1String(""), layout, row);
 
 	// text encoding
-	m_textEncoding = addComboBox("Text Encoding", "", layout, row);
+	m_textEncoding = addComboBox(QStringLiteral("Text Encoding"), QLatin1String(""), layout, row);
 	for (int mib: QTextCodec::availableMibs())
 	{
 		m_textEncoding->addItem(QTextCodec::codecForMib(mib)->name());
 	}
 
 	// color scheme
-	m_colorSchemes = addComboBox("Color Scheme", "", layout, row);
+	m_colorSchemes = addComboBox(QStringLiteral("Color Scheme"), QLatin1String(""), layout, row);
 	for (size_t i = 0; i < m_colorSchemePaths.size(); i++)
 	{
 		m_colorSchemes->insertItem(
@@ -94,26 +94,26 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 
 	// animations
 	m_useAnimations = addCheckBox(
-		"Animations",
-		"Enable animations",
-		"<p>Enable animations throughout the user interface.</p>",
+		QStringLiteral("Animations"),
+		QStringLiteral("Enable animations"),
+		QStringLiteral("<p>Enable animations throughout the user interface.</p>"),
 		layout,
 		row);
 
 	// built-in types
 	m_showBuiltinTypes = addCheckBox(
-		"Built-in Types",
-		"Show built-in types in graph when referenced",
-		"<p>Enable display of referenced built-in types in the graph view.</p>",
+		QStringLiteral("Built-in Types"),
+		QStringLiteral("Show built-in types in graph when referenced"),
+		QStringLiteral("<p>Enable display of referenced built-in types in the graph view.</p>"),
 		layout,
 		row);
 
 	// directory in code
 	m_showDirectoryInCode = addCheckBox(
-		"Directory in File Title",
-		"Show directory of file in code title",
-		"<p>Enable display of the parent directory of a code file relative to the project "
-		"file.</p>",
+		QStringLiteral("Directory in File Title"),
+		QStringLiteral("Show directory of file in code title"),
+		QStringLiteral("<p>Enable display of the parent directory of a code file relative to the project "
+		"file.</p>"),
 		layout,
 		row);
 	layout->setRowMinimumHeight(row - 1, 30);
@@ -125,29 +125,29 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 	if (utility::getOsType() == OS_LINUX)
 	{
 		// screen
-		addTitle("SCREEN", layout, row);
+		addTitle(QStringLiteral("SCREEN"), layout, row);
 
-		QLabel* hint = new QLabel("<changes need restart>");
-		hint->setStyleSheet("color: grey");
+		QLabel* hint = new QLabel(QStringLiteral("<changes need restart>"));
+		hint->setStyleSheet(QStringLiteral("color: grey"));
 		layout->addWidget(hint, row - 1, QtProjectWizardWindow::BACK_COL, Qt::AlignRight);
 
 		// auto scaling
-		m_screenAutoScalingInfoLabel = new QLabel("");
+		m_screenAutoScalingInfoLabel = new QLabel(QLatin1String(""));
 		m_screenAutoScaling = addComboBoxWithWidgets(
-			"Auto Scaling to DPI",
-			"<p>Define if automatic scaling to screen DPI resolution is active. "
+			QStringLiteral("Auto Scaling to DPI"),
+			QStringLiteral("<p>Define if automatic scaling to screen DPI resolution is active. "
 			"This setting manipulates the environment flag QT_AUTO_SCREEN_SCALE_FACTOR of the Qt "
 			"framework "
 			"(<a "
 			"href=\"http://doc.qt.io/qt-5/highdpi.html\">http://doc.qt.io/qt-5/highdpi.html</a>). "
 			"Choose 'system' to stick to the setting of your current environment.</p>"
-			"<p>Changes to this setting require a restart of the application to take effect.</p>",
+			"<p>Changes to this setting require a restart of the application to take effect.</p>"),
 			{m_screenAutoScalingInfoLabel},
 			layout,
 			row);
-		m_screenAutoScaling->addItem("system", -1);
-		m_screenAutoScaling->addItem("off", 0);
-		m_screenAutoScaling->addItem("on", 1);
+		m_screenAutoScaling->addItem(QStringLiteral("system"), -1);
+		m_screenAutoScaling->addItem(QStringLiteral("off"), 0);
+		m_screenAutoScaling->addItem(QStringLiteral("on"), 1);
 		connect(
 			m_screenAutoScaling,
 			static_cast<void (QComboBox::*)(int)>(&QComboBox::activated),
@@ -155,30 +155,30 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 			&QtProjectWizardContentPreferences::uiAutoScalingChanges);
 
 		// scale factor
-		m_screenScaleFactorInfoLabel = new QLabel("");
+		m_screenScaleFactorInfoLabel = new QLabel(QLatin1String(""));
 		m_screenScaleFactor = addComboBoxWithWidgets(
-			"Scale Factor",
-			"<p>Define a screen scale factor for the user interface of the application. "
+			QStringLiteral("Scale Factor"),
+			QStringLiteral("<p>Define a screen scale factor for the user interface of the application. "
 			"This setting manipulates the environment flag QT_SCALE_FACTOR of the Qt framework "
 			"(<a "
 			"href=\"http://doc.qt.io/qt-5/highdpi.html\">http://doc.qt.io/qt-5/highdpi.html</a>). "
 			"Choose 'system' to stick to the setting of your current environment.</p>"
-			"<p>Changes to this setting require a restart of the application to take effect.</p>",
+			"<p>Changes to this setting require a restart of the application to take effect.</p>"),
 			{m_screenScaleFactorInfoLabel},
 			layout,
 			row);
-		m_screenScaleFactor->addItem("system", -1.0);
-		m_screenScaleFactor->addItem("25%", 0.25);
-		m_screenScaleFactor->addItem("50%", 0.5);
-		m_screenScaleFactor->addItem("75%", 0.75);
-		m_screenScaleFactor->addItem("100%", 1.0);
-		m_screenScaleFactor->addItem("125%", 1.25);
-		m_screenScaleFactor->addItem("150%", 1.5);
-		m_screenScaleFactor->addItem("175%", 1.75);
-		m_screenScaleFactor->addItem("200%", 2.0);
-		m_screenScaleFactor->addItem("250%", 2.5);
-		m_screenScaleFactor->addItem("300%", 3.0);
-		m_screenScaleFactor->addItem("400%", 4.0);
+		m_screenScaleFactor->addItem(QStringLiteral("system"), -1.0);
+		m_screenScaleFactor->addItem(QStringLiteral("25%"), 0.25);
+		m_screenScaleFactor->addItem(QStringLiteral("50%"), 0.5);
+		m_screenScaleFactor->addItem(QStringLiteral("75%"), 0.75);
+		m_screenScaleFactor->addItem(QStringLiteral("100%"), 1.0);
+		m_screenScaleFactor->addItem(QStringLiteral("125%"), 1.25);
+		m_screenScaleFactor->addItem(QStringLiteral("150%"), 1.5);
+		m_screenScaleFactor->addItem(QStringLiteral("175%"), 1.75);
+		m_screenScaleFactor->addItem(QStringLiteral("200%"), 2.0);
+		m_screenScaleFactor->addItem(QStringLiteral("250%"), 2.5);
+		m_screenScaleFactor->addItem(QStringLiteral("300%"), 3.0);
+		m_screenScaleFactor->addItem(QStringLiteral("400%"), 4.0);
 		connect(
 			m_screenScaleFactor,
 			static_cast<void (QComboBox::*)(int)>(&QComboBox::activated),
@@ -189,37 +189,37 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 	}
 
 	// Controls
-	addTitle("CONTROLS", layout, row);
+	addTitle(QStringLiteral("CONTROLS"), layout, row);
 
 	// scroll speed
 	m_scrollSpeed = addLineEdit(
-		"Scroll Speed",
-		"<p>Set a multiplier for the in app scroll speed.</p>"
+		QStringLiteral("Scroll Speed"),
+		QStringLiteral("<p>Set a multiplier for the in app scroll speed.</p>"
 		"<p>A value between 0 and 1 results in slower scrolling while a value higher than 1 "
-		"increases scroll speed.</p>",
+		"increases scroll speed.</p>"),
 		layout,
 		row);
 
 	// graph zooming
-	QString modifierName = utility::getOsType() == OS_MAC ? "Cmd" : "Ctrl";
+	QString modifierName = utility::getOsType() == OS_MAC ? QStringLiteral("Cmd") : QStringLiteral("Ctrl");
 	m_graphZooming = addCheckBox(
-		"Graph Zoom",
-		"Zoom graph on mouse wheel",
-		"<p>Enable graph zoom using mouse wheel only, instead of using " + modifierName +
-			" + Mouse Wheel.</p>",
+		QStringLiteral("Graph Zoom"),
+		QStringLiteral("Zoom graph on mouse wheel"),
+		QStringLiteral("<p>Enable graph zoom using mouse wheel only, instead of using ") + modifierName +
+			QStringLiteral(" + Mouse Wheel.</p>"),
 		layout,
 		row);
 
 	addGap(layout, row);
 
 	// output
-	addTitle("OUTPUT", layout, row);
+	addTitle(QStringLiteral("OUTPUT"), layout, row);
 
 	// logging
 	m_loggingEnabled = addCheckBox(
-		"Logging",
-		"Enable console and file logging",
-		"<p>Show logs in the console and save this information in files.</p>",
+		QStringLiteral("Logging"),
+		QStringLiteral("Enable console and file logging"),
+		QStringLiteral("<p>Show logs in the console and save this information in files.</p>"),
 		layout,
 		row);
 	connect(
@@ -229,67 +229,66 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 		&QtProjectWizardContentPreferences::loggingEnabledChanged);
 
 	m_verboseIndexerLoggingEnabled = addCheckBox(
-		"Indexer Logging",
-		"Enable verbose indexer logging",
-		"<p>Enable additional logs of abstract syntax tree traversal during indexing. This "
+		QStringLiteral("Indexer Logging"),
+		QStringLiteral("Enable verbose indexer logging"),
+		QStringLiteral("<p>Enable additional logs of abstract syntax tree traversal during indexing. This "
 		"information can help "
 		"tracking down crashes that occurr during indexing.</p>"
-		"<p><b>Warning</b>: This slows down indexing performance a lot.</p>",
+		"<p><b>Warning</b>: This slows down indexing performance a lot.</p>"),
 		layout,
 		row);
 
 	addGap(layout, row);
 
 	// Network
-	addTitle("NETWORK", layout, row);
+	addTitle(QStringLiteral("NETWORK"), layout, row);
 
 	// Update check
 	m_automaticUpdateCheck = addCheckBox(
-		"Automatic<br />Update Check",
-		"Check automatically for updates",
-		"<p>Automatically connects to the Sourcetrail server once a day to check if a new release "
-		"is "
-		"available.</p>"
+		QStringLiteral("Automatic<br />Update Check"),
+		QStringLiteral("Check automatically for updates"),
+		QStringLiteral("<p>Automatically connects to the Sourcetrail server once a day to check "
+		"if a new release is available.</p>"
 		"<p>Note: No personally identifiable information will be transmitted to conduct this "
-		"check.</p>",
+		"check.</p>"),
 		layout,
 		row);
 	addGap(layout, row);
 
 	// Plugins
-	addTitle("PLUGIN", layout, row);
+	addTitle(QStringLiteral("PLUGIN"), layout, row);
 
 	// Sourcetrail port
 	m_sourcetrailPort = addLineEdit(
-		"Sourcetrail Port",
-		"<p>Port number that Sourcetrail uses to listen for incoming messages from plugins.</p>",
+		QStringLiteral("Sourcetrail Port"),
+		QStringLiteral("<p>Port number that Sourcetrail uses to listen for incoming messages from plugins.</p>"),
 		layout,
 		row);
 
 	// Sourcetrail port
 	m_pluginPort = addLineEdit(
-		"Plugin Port",
-		"<p>Port number that Sourcetrail uses to sends outgoing messages to plugins.</p>",
+		QStringLiteral("Plugin Port"),
+		QStringLiteral("<p>Port number that Sourcetrail uses to sends outgoing messages to plugins.</p>"),
 		layout,
 		row);
 
 	addGap(layout, row);
 
 	// indexing
-	addTitle("INDEXING", layout, row);
+	addTitle(QStringLiteral("INDEXING"), layout, row);
 
 	// indexer threads
-	m_threadsInfoLabel = new QLabel("");
+	m_threadsInfoLabel = new QLabel(QLatin1String(""));
 	utility::setWidgetRetainsSpaceWhenHidden(m_threadsInfoLabel);
 	m_threads = addComboBoxWithWidgets(
-		"Indexer Threads",
+		QStringLiteral("Indexer Threads"),
 		0,
 		24,
-		"<p>Set the number of threads used to work on indexing your project in parallel.</p>",
+		QStringLiteral("<p>Set the number of threads used to work on indexing your project in parallel.</p>"),
 		{m_threadsInfoLabel},
 		layout,
 		row);
-	m_threads->setItemText(0, "default");
+	m_threads->setItemText(0, QStringLiteral("default"));
 	connect(
 		m_threads,
 		static_cast<void (QComboBox::*)(int)>(&QComboBox::activated),
@@ -298,11 +297,11 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 
 	// multi process indexing
 	m_multiProcessIndexing = addCheckBox(
-		"Multi Process<br />C/C++ Indexing",
-		"Run C/C++ indexer threads in different process",
-		"<p>Enable C/C++ indexer threads to run in different process.</p>"
+		QStringLiteral("Multi Process<br />C/C++ Indexing"),
+		QStringLiteral("Run C/C++ indexer threads in different process"),
+		QStringLiteral("<p>Enable C/C++ indexer threads to run in different process.</p>"
 		"<p>This prevents the application from crashing due to unforseen exceptions while "
-		"indexing.</p>",
+		"indexing.</p>"),
 		layout,
 		row);
 
@@ -310,7 +309,7 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 
 
 	// Java
-	addTitle("JAVA", layout, row);
+	addTitle(QStringLiteral("JAVA"), layout, row);
 
 	{
 		// jvm library path
@@ -319,16 +318,16 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 		switch (utility::getOsType())
 		{
 		case OS_WINDOWS:
-			m_javaPath->setFileFilter("JVM Library (jvm.dll)");
-			m_javaPath->setPlaceholderText("<jre_path>/bin/client/jvm.dll");
+			m_javaPath->setFileFilter(QStringLiteral("JVM Library (jvm.dll)"));
+			m_javaPath->setPlaceholderText(QStringLiteral("<jre_path>/bin/client/jvm.dll"));
 			break;
 		case OS_MAC:
-			m_javaPath->setFileFilter("JLI or JVM Library (libjli.dylib libjvm.dylib)");
-			m_javaPath->setPlaceholderText("<jre_path>/Contents/Home/jre/lib/jli/libjli.dylib");
+			m_javaPath->setFileFilter(QStringLiteral("JLI or JVM Library (libjli.dylib libjvm.dylib)"));
+			m_javaPath->setPlaceholderText(QStringLiteral("<jre_path>/Contents/Home/jre/lib/jli/libjli.dylib"));
 			break;
 		case OS_LINUX:
-			m_javaPath->setFileFilter("JVM Library (libjvm.so)");
-			m_javaPath->setPlaceholderText("<jre_path>/bin/<arch>/server/libjvm.so");
+			m_javaPath->setFileFilter(QStringLiteral("JVM Library (libjvm.so)"));
+			m_javaPath->setPlaceholderText(QStringLiteral("<jre_path>/bin/<arch>/server/libjvm.so"));
 			break;
 		default:
 			LOG_WARNING("No placeholders and filters set for Java path selection");
@@ -346,7 +345,7 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 		const std::string javaVersionString = javaArchitectureString + " Java 8";
 
 		addHelpButton(
-			"Java Path",
+			QStringLiteral("Java Path"),
 			("<p>Only required for indexing Java projects.</p>"
 			 "<p>Provide the location of the jvm library inside the installation of your " +
 			 javaVersionString +
@@ -364,15 +363,15 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 
 	{
 		// JRE System Library
-		const QString title = "JRE System Library";
+		const QString title = QStringLiteral("JRE System Library");
 		QLabel* label = createFormLabel(title);
 		layout->addWidget(label, row, QtProjectWizardWindow::FRONT_COL, Qt::AlignTop);
 
 		addHelpButton(
-			"JRE System Library",
-			"<p>Only required for indexing Java projects.</p>"
+			QStringLiteral("JRE System Library"),
+			QStringLiteral("<p>Only required for indexing Java projects.</p>"
 			"<p>Add the jar files of your JRE System Library. These jars can be found inside your "
-			"JRE install directory.</p>",
+			"JRE install directory.</p>"),
 			layout,
 			row);
 
@@ -391,22 +390,22 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 
 		if (QSysInfo::windowsVersion() != QSysInfo::WV_None)
 		{
-			m_mavenPath->setFileFilter("Maven command (mvn.cmd)");
-			m_mavenPath->setPlaceholderText("<maven_path>/bin/mvn.cmd");
+			m_mavenPath->setFileFilter(QStringLiteral("Maven command (mvn.cmd)"));
+			m_mavenPath->setPlaceholderText(QStringLiteral("<maven_path>/bin/mvn.cmd"));
 		}
 		else
 		{
-			m_mavenPath->setFileFilter("Maven command (mvn)");
-			m_mavenPath->setPlaceholderText("<binarypath>/mvn");
+			m_mavenPath->setFileFilter(QStringLiteral("Maven command (mvn)"));
+			m_mavenPath->setPlaceholderText(QStringLiteral("<binarypath>/mvn"));
 		}
 
-		addLabelAndWidget("Maven Path", m_mavenPath, layout, row);
+		addLabelAndWidget(QStringLiteral("Maven Path"), m_mavenPath, layout, row);
 
 		addHelpButton(
-			"Maven Path",
-			"<p>Only required for indexing projects using Maven.</p>"
+			QStringLiteral("Maven Path"),
+			QStringLiteral("<p>Only required for indexing projects using Maven.</p>"
 			"<p>Provide the location of your installed Maven executable. You can also use the auto "
-			"detection below.</p>",
+			"detection below.</p>"),
 			layout,
 			row);
 		row++;
@@ -418,25 +417,25 @@ void QtProjectWizardContentPreferences::populate(QGridLayout* layout, int& row)
 	addGap(layout, row);
 
 
-	addTitle("Python", layout, row);
+	addTitle(QStringLiteral("Python"), layout, row);
 
 	m_pythonPostProcessing = addCheckBox(
-		"Post Processing",
-		"Add ambiguous edges for unsolved references (recommended)",
-		"<p>Enable a post processing step to solve unsolved references after the indexing is done. "
+		QStringLiteral("Post Processing"),
+		QStringLiteral("Add ambiguous edges for unsolved references (recommended)"),
+		QStringLiteral("<p>Enable a post processing step to solve unsolved references after the indexing is done. "
 		"</p>"
 		"<p>These references will be marked \"ambiguous\" to indicate that some of these edges may "
 		"never "
 		"be encountered during runtime of the indexed code because the post processing only relies "
 		"on "
-		"symbol names and types.</p>",
+		"symbol names and types.</p>"),
 		layout,
 		row);
 
 	addGap(layout, row);
 
 
-	addTitle("C/C++", layout, row);
+	addTitle(QStringLiteral("C/C++"), layout, row);
 }
 
 void QtProjectWizardContentPreferences::load()
@@ -647,16 +646,17 @@ void QtProjectWizardContentPreferences::uiAutoScalingChanges(int index)
 	if (index == 0)
 	{
 		QString autoScale(qgetenv("QT_AUTO_SCREEN_SCALE_FACTOR_SOURCETRAIL"));
-		if (autoScale == "1")
+		if (autoScale == QLatin1String("1"))
 		{
-			autoScale = "on";
+			autoScale = QStringLiteral("on");
 		}
 		else
 		{
-			autoScale = "off";
+			autoScale = QStringLiteral("off");
 		}
 
-		m_screenAutoScalingInfoLabel->setText("detected: '" + autoScale + "'");
+		m_screenAutoScalingInfoLabel->setText(
+					QStringLiteral("detected: '") + autoScale + QStringLiteral("'"));
 		m_screenAutoScalingInfoLabel->show();
 	}
 	else
@@ -669,7 +669,7 @@ void QtProjectWizardContentPreferences::uiScaleFactorChanges(int index)
 {
 	if (index == 0)
 	{
-		QString scale = "100";
+		QString scale = QStringLiteral("100");
 		bool ok;
 		double scaleFactor = qgetenv("QT_SCALE_FACTOR_SOURCETRAIL").toDouble(&ok);
 		if (ok)
@@ -677,7 +677,8 @@ void QtProjectWizardContentPreferences::uiScaleFactorChanges(int index)
 			scale = QString::number(int(scaleFactor * 100));
 		}
 
-		m_screenScaleFactorInfoLabel->setText("detected: '" + scale + "%'");
+		m_screenScaleFactorInfoLabel->setText(
+					QStringLiteral("detected: '") + scale + QStringLiteral("%'"));
 		m_screenScaleFactorInfoLabel->show();
 	}
 	else
@@ -694,7 +695,7 @@ void QtProjectWizardContentPreferences::addJavaPathDetection(QGridLayout* layout
 		return;
 	}
 
-	QLabel* label = new QLabel("Auto detection from:");
+	QLabel* label = new QLabel(QStringLiteral("Auto detection from:"));
 
 	m_javaPathDetectorBox = new QComboBox();
 
@@ -703,8 +704,8 @@ void QtProjectWizardContentPreferences::addJavaPathDetection(QGridLayout* layout
 		m_javaPathDetectorBox->addItem(detectorName.c_str());
 	}
 
-	QPushButton* button = new QPushButton("detect");
-	button->setObjectName("windowButton");
+	QPushButton* button = new QPushButton(QStringLiteral("detect"));
+	button->setObjectName(QStringLiteral("windowButton"));
 	connect(
 		button,
 		&QPushButton::clicked,
@@ -734,7 +735,7 @@ void QtProjectWizardContentPreferences::addJreSystemLibraryPathsDetection(QGridL
 		return;
 	}
 
-	QLabel* label = new QLabel("Auto detection from:");
+	QLabel* label = new QLabel(QStringLiteral("Auto detection from:"));
 
 	m_jreSystemLibraryPathsDetectorBox = new QComboBox();
 
@@ -743,8 +744,8 @@ void QtProjectWizardContentPreferences::addJreSystemLibraryPathsDetection(QGridL
 		m_jreSystemLibraryPathsDetectorBox->addItem(detectorName.c_str());
 	}
 
-	QPushButton* button = new QPushButton("detect");
-	button->setObjectName("windowButton");
+	QPushButton* button = new QPushButton(QStringLiteral("detect"));
+	button->setObjectName(QStringLiteral("windowButton"));
 	connect(
 		button,
 		&QPushButton::clicked,
@@ -773,7 +774,7 @@ void QtProjectWizardContentPreferences::addMavenPathDetection(QGridLayout* layou
 		return;
 	}
 
-	QLabel* label = new QLabel("Auto detection from:");
+	QLabel* label = new QLabel(QStringLiteral("Auto detection from:"));
 
 	m_mavenPathDetectorBox = new QComboBox();
 
@@ -782,8 +783,8 @@ void QtProjectWizardContentPreferences::addMavenPathDetection(QGridLayout* layou
 		m_mavenPathDetectorBox->addItem(detectorName.c_str());
 	}
 
-	QPushButton* button = new QPushButton("detect");
-	button->setObjectName("windowButton");
+	QPushButton* button = new QPushButton(QStringLiteral("detect"));
+	button->setObjectName(QStringLiteral("windowButton"));
 	connect(
 		button,
 		&QPushButton::clicked,
@@ -935,7 +936,7 @@ QLineEdit* QtProjectWizardContentPreferences::addLineEdit(
 	QString label, QString helpText, QGridLayout* layout, int& row)
 {
 	QLineEdit* lineEdit = new QLineEdit(this);
-	lineEdit->setObjectName("name");
+	lineEdit->setObjectName(QStringLiteral("name"));
 	lineEdit->setAttribute(Qt::WA_MacShowFocusRect, 0);
 
 	addLabelAndWidget(label, lineEdit, layout, row);

src/lib_gui/qt/project_wizard/content/QtProjectWizardContentProjectData.cpp

@@ -27,9 +27,9 @@ void QtProjectWizardContentProjectData::populate(QGridLayout* layout, int& row)
 		row++;
 	}
 
-	QLabel* nameLabel = createFormLabel("Sourcetrail Project Name");
+	QLabel* nameLabel = createFormLabel(QStringLiteral("Sourcetrail Project Name"));
 	m_projectName = new QLineEdit();
-	m_projectName->setObjectName("name");
+	m_projectName->setObjectName(QStringLiteral("name"));
 	m_projectName->setAttribute(Qt::WA_MacShowFocusRect, 0);
 	m_projectName->setEnabled(!m_disableNameEditing);
 	connect(
@@ -43,7 +43,7 @@ void QtProjectWizardContentProjectData::populate(QGridLayout* layout, int& row)
 	layout->setRowMinimumHeight(row, 30);
 	row++;
 
-	QLabel* locationLabel = createFormLabel("Sourcetrail Project Location");
+	QLabel* locationLabel = createFormLabel(QStringLiteral("Sourcetrail Project Location"));
 	m_projectFileLocation = new QtLocationPicker(this);
 	m_projectFileLocation->setPickDirectory(true);
 	m_projectFileLocation->setEnabled(!m_disableNameEditing);
@@ -51,8 +51,8 @@ void QtProjectWizardContentProjectData::populate(QGridLayout* layout, int& row)
 	layout->addWidget(locationLabel, row, QtProjectWizardWindow::FRONT_COL, Qt::AlignRight);
 	layout->addWidget(m_projectFileLocation, row, QtProjectWizardWindow::BACK_COL, Qt::AlignTop);
 	addHelpButton(
-		"Sourcetrail Project Location",
-		"The directory the Sourcetrail project file (.srctrlprj) will be saved to.",
+		QStringLiteral("Sourcetrail Project Location"),
+		QStringLiteral("The directory the Sourcetrail project file (.srctrlprj) will be saved to."),
 		layout,
 		row);
 	layout->setRowMinimumHeight(row, 30);
@@ -84,7 +84,7 @@ bool QtProjectWizardContentProjectData::check()
 	if (m_projectName->text().isEmpty())
 	{
 		QMessageBox msgBox;
-		msgBox.setText("Please enter a project name.");
+		msgBox.setText(QStringLiteral("Please enter a project name."));
 		msgBox.exec();
 		return false;
 	}
@@ -102,7 +102,7 @@ bool QtProjectWizardContentProjectData::check()
 	if (m_projectFileLocation->getText().isEmpty())
 	{
 		QMessageBox msgBox;
-		msgBox.setText("Please define the location for the Sourcetrail project file.");
+		msgBox.setText(QStringLiteral("Please define the location for the Sourcetrail project file."));
 		msgBox.exec();
 		return false;
 	}
@@ -140,9 +140,9 @@ bool QtProjectWizardContentProjectData::check()
 	{
 		QMessageBox msgBox;
 		msgBox.setText(
-			"The specified location does not exist. Do you want to create the directory?");
-		msgBox.addButton("Abort", QMessageBox::ButtonRole::NoRole);
-		QPushButton* createButton = msgBox.addButton("Create", QMessageBox::ButtonRole::YesRole);
+			QStringLiteral("The specified location does not exist. Do you want to create the directory?"));
+		msgBox.addButton(QStringLiteral("Abort"), QMessageBox::ButtonRole::NoRole);
+		QPushButton* createButton = msgBox.addButton(QStringLiteral("Create"), QMessageBox::ButtonRole::YesRole);
 		msgBox.setDefaultButton(createButton);
 		msgBox.setIcon(QMessageBox::Icon::Question);
 		int ret = msgBox.exec();
@@ -163,8 +163,8 @@ void QtProjectWizardContentProjectData::onProjectNameEdited(QString text)
 {
 	const int cursorPosition = m_projectName->cursorPosition();
 
-	QRegularExpression regex("[^A-Za-z0-9_.-]");
-	text.replace(regex, "_");
+	QRegularExpression regex(QStringLiteral("[^A-Za-z0-9_.-]"));
+	text.replace(regex, QStringLiteral("_"));
 
 	m_projectName->setText(text);
 	m_projectName->setCursorPosition(cursorPosition);

src/lib_gui/qt/project_wizard/content/QtProjectWizardContentSelect.cpp

@@ -152,7 +152,7 @@ void QtProjectWizardContentSelect::populate(QGridLayout* layout, int& row)
 	for (auto& it: sourceGroupInfos)
 	{
 		QPushButton* b = new QPushButton(languageTypeToString(it.first).c_str(), this);
-		b->setObjectName("menuButton");
+		b->setObjectName(QStringLiteral("menuButton"));
 		b->setCheckable(true);
 		b->setProperty("language_type", it.first);
 		m_languages->addButton(b);
@@ -194,7 +194,8 @@ void QtProjectWizardContentSelect::populate(QGridLayout* layout, int& row)
 			m_window->setNextEnabled(false);
 			m_title->setText("Source Group Types - " + m_languages->checkedButton()->text());
 
-			m_description->setText(hasRecommeded ? "<b>* recommended</b>" : "");
+			m_description->setText(hasRecommeded ?
+									   QStringLiteral("<b>* recommended</b>") : QLatin1String(""));
 		});
 
 	QtFlowLayout* flayout = new QtFlowLayout(10, 0, 0);
@@ -220,7 +221,7 @@ void QtProjectWizardContentSelect::populate(QGridLayout* layout, int& row)
 
 			if (sourceGroupIt.recommended)
 			{
-				b->setStyleSheet("font-weight: bold");
+				b->setStyleSheet(QStringLiteral("font-weight: bold"));
 			}
 
 			b->setProperty("source_group_type", int(sourceGroupIt.type));
@@ -257,14 +258,14 @@ void QtProjectWizardContentSelect::populate(QGridLayout* layout, int& row)
 	containerLayout->setContentsMargins(0, 0, 0, 0);
 
 	QFrame* groupContainer = new QFrame();
-	groupContainer->setObjectName("sourceGroupContainer");
+	groupContainer->setObjectName(QStringLiteral("sourceGroupContainer"));
 	groupContainer->setLayout(flayout);
 	containerLayout->addWidget(groupContainer, 0);
 
-	m_description = new QLabel(" \n \n");
+	m_description = new QLabel(QStringLiteral(" \n \n"));
 	m_description->setWordWrap(true);
 	m_description->setOpenExternalLinks(true);
-	m_description->setObjectName("sourceGroupDescription");
+	m_description->setObjectName(QStringLiteral("sourceGroupDescription"));
 	m_description->setTextInteractionFlags(Qt::TextSelectableByMouse | Qt::LinksAccessibleByMouse);
 	m_description->setMinimumHeight(80);
 	containerLayout->addWidget(m_description, 0);
@@ -272,8 +273,8 @@ void QtProjectWizardContentSelect::populate(QGridLayout* layout, int& row)
 	container->setLayout(containerLayout);
 	layout->addWidget(container, 0, QtProjectWizardWindow::BACK_COL);
 
-	m_title = new QLabel("Source Group Types");
-	m_title->setObjectName("sourceGroupTitle");
+	m_title = new QLabel(QStringLiteral("Source Group Types"));
+	m_title->setObjectName(QStringLiteral("sourceGroupTitle"));
 
 	layout->addWidget(m_title, 0, QtProjectWizardWindow::BACK_COL, Qt::AlignLeft | Qt::AlignTop);
 
@@ -321,7 +322,7 @@ bool QtProjectWizardContentSelect::check()
 	if (!sourceGroupChosen)
 	{
 		QMessageBox msgBox;
-		msgBox.setText("Please choose a method of creating a new Source Group.");
+		msgBox.setText(QStringLiteral("Please choose a method of creating a new Source Group."));
 		msgBox.exec();
 		return false;
 	}

src/lib_gui/qt/project_wizard/content/QtProjectWizardContentSourceGroupData.cpp

@@ -15,24 +15,24 @@ QtProjectWizardContentSourceGroupData::QtProjectWizardContentSourceGroupData(
 void QtProjectWizardContentSourceGroupData::populate(QGridLayout* layout, int& row)
 {
 	m_name = new QLineEdit();
-	m_name->setObjectName("name");
+	m_name->setObjectName(QStringLiteral("name"));
 	m_name->setAttribute(Qt::WA_MacShowFocusRect, 0);
 	connect(m_name, &QLineEdit::textEdited, this, &QtProjectWizardContentSourceGroupData::editedName);
 
 	layout->addWidget(
-		createFormLabel("Source Group Name"), row, QtProjectWizardWindow::FRONT_COL, Qt::AlignRight);
+		createFormLabel(QStringLiteral("Source Group Name")), row, QtProjectWizardWindow::FRONT_COL, Qt::AlignRight);
 	layout->addWidget(m_name, row, QtProjectWizardWindow::BACK_COL);
 	row++;
 
-	m_status = new QCheckBox("active");
+	m_status = new QCheckBox(QStringLiteral("active"));
 	connect(
 		m_status, &QCheckBox::toggled, this, &QtProjectWizardContentSourceGroupData::changedStatus);
 	layout->addWidget(
-		createFormLabel("Status"), row, QtProjectWizardWindow::FRONT_COL, Qt::AlignRight);
+		createFormLabel(QStringLiteral("Status")), row, QtProjectWizardWindow::FRONT_COL, Qt::AlignRight);
 	layout->addWidget(m_status, row, QtProjectWizardWindow::BACK_COL);
 
 	addHelpButton(
-		"Status",
+		QStringLiteral("Status"),
 		"<p>Only source files of active Source Groups will be processed during indexing. "
 		"Inactive Source Groups will be ignored or cleared from the index.</p><p>Use this setting "
 		"to temporarily "
@@ -63,7 +63,7 @@ bool QtProjectWizardContentSourceGroupData::check()
 	if (m_name->text().isEmpty())
 	{
 		QMessageBox msgBox;
-		msgBox.setText("Please enter a source group name.");
+		msgBox.setText(QStringLiteral("Please enter a source group name."));
 		msgBox.exec();
 		return false;
 	}

src/lib_gui/qt/project_wizard/content/QtProjectWizardContentSourceGroupInfoText.cpp

@@ -30,7 +30,7 @@ void QtProjectWizardContentSourceGroupInfoText::populate(QGridLayout* layout, in
 		"<p><b>Hint</b>: If your project contains source code for multiple build targets, you can "
 		"add all of those source "
 		"files with one single source group as long as they all share the same parameters.</p>");
-	infoLabel->setObjectName("info");
+	infoLabel->setObjectName(QStringLiteral("info"));
 	infoLabel->setWordWrap(true);
 	layoutHorz->addWidget(infoLabel);
 

src/lib_gui/qt/project_wizard/content/QtProjectWizardContentUnloadable.cpp

@@ -32,7 +32,7 @@ void QtProjectWizardContentUnloadable::populate(QGridLayout* layout, int& row)
 	QLabel* infoLabel = new QLabel(QString::fromStdString(
 		"<p>The type \"" + m_settings->getTypeString() +
 		"\" of the selected Source Group is not supportetd by this version of Sourcetrail.</p>"));
-	infoLabel->setObjectName("info");
+	infoLabel->setObjectName(QStringLiteral("info"));
 	infoLabel->setWordWrap(true);
 	layoutHorz->addWidget(infoLabel);
 

src/lib_gui/qt/project_wizard/content/paths/QtProjectWizardContentPaths.cpp

@@ -93,10 +93,10 @@ bool QtProjectWizardContentPaths::check()
 								   "remove them before continuing?")
 							   .arg(m_titleString));
 			msgBox.setDetailedText(missingPaths);
-			QPushButton* removeButton = msgBox.addButton("Remove", QMessageBox::YesRole);
-			QPushButton* keepButton = msgBox.addButton("Keep", QMessageBox::ButtonRole::NoRole);
+			QPushButton* removeButton = msgBox.addButton(QStringLiteral("Remove"), QMessageBox::YesRole);
+			QPushButton* keepButton = msgBox.addButton(QStringLiteral("Keep"), QMessageBox::ButtonRole::NoRole);
 			QPushButton* cancelButton = msgBox.addButton(
-				"Cancel", QMessageBox::ButtonRole::RejectRole);
+				QStringLiteral("Cancel"), QMessageBox::ButtonRole::RejectRole);
 
 			msgBox.exec();
 
@@ -136,7 +136,7 @@ void QtProjectWizardContentPaths::addDetection(QGridLayout* layout, int row)
 		return;
 	}
 
-	QLabel* label = new QLabel("Auto detection from:");
+	QLabel* label = new QLabel(QStringLiteral("Auto detection from:"));
 
 	m_detectorBox = new QComboBox();
 
@@ -145,8 +145,8 @@ void QtProjectWizardContentPaths::addDetection(QGridLayout* layout, int row)
 		m_detectorBox->addItem(detectorName.c_str());
 	}
 
-	QPushButton* button = new QPushButton("detect");
-	button->setObjectName("windowButton");
+	QPushButton* button = new QPushButton(QStringLiteral("detect"));
+	button->setObjectName(QStringLiteral("windowButton"));
 	connect(button, &QPushButton::clicked, this, &QtProjectWizardContentPaths::detectionClicked);
 
 	QHBoxLayout* hlayout = new QHBoxLayout();

src/lib_gui/qt/project_wizard/content/paths/QtProjectWizardContentPathsExclude.cpp

@@ -10,7 +10,7 @@ QtProjectWizardContentPathsExclude::QtProjectWizardContentPathsExclude(
 	: QtProjectWizardContentPaths(
 		  settings, window, QtPathListBox::SELECTION_POLICY_FILES_AND_DIRECTORIES, false)
 {
-	setTitleString("Excluded Files & Directories");
+	setTitleString(QStringLiteral("Excluded Files & Directories"));
 	setHelpString(
 		"<p>These paths define the files and directories that will be left out from indexing.</p>"
 		"<p>Hints:"

src/lib_gui/qt/project_wizard/content/paths/QtProjectWizardContentPathsSource.cpp

@@ -28,10 +28,10 @@ QtProjectWizardContentPathsSource::QtProjectWizardContentPathsSource(
 	: QtProjectWizardContentPaths(
 		  settings, window, QtPathListBox::SELECTION_POLICY_FILES_AND_DIRECTORIES)
 {
-	m_showFilesString = "show files";
+	m_showFilesString = QStringLiteral("show files");
 
-	setTitleString("Files & Directories to Index");
-	setHelpString(
+	setTitleString(QStringLiteral("Files & Directories to Index"));
+	setHelpString(QStringLiteral(
 		"These paths define the files and directories that will be indexed by Sourcetrail. Provide "
 		"a directory to recursively "
 		"add all contained source and header files.<br />"
@@ -40,7 +40,7 @@ QtProjectWizardContentPathsSource::QtProjectWizardContentPathsSource(
 		"kept at a different location, "
 		"you will also need to add that directory.<br />"
 		"<br />"
-		"You can make use of environment variables with ${ENV_VAR}.");
+		"You can make use of environment variables with ${ENV_VAR}."));
 }
 
 void QtProjectWizardContentPathsSource::load()
@@ -102,10 +102,10 @@ std::vector<FilePath> QtProjectWizardContentPathsSource::getFilePaths() const
 
 QString QtProjectWizardContentPathsSource::getFileNamesTitle() const
 {
-	return "Indexed Files";
+	return QStringLiteral("Indexed Files");
 }
 
 QString QtProjectWizardContentPathsSource::getFileNamesDescription() const
 {
-	return " files will be indexed.";
+	return QStringLiteral(" files will be indexed.");
 }

src/lib_gui/qt/utility/QtFileDialog.cpp

@@ -22,7 +22,7 @@ QStringList QtFileDialog::getFileNamesAndDirectories(QWidget* parent, const File
 		dialog->setDirectory(dir);
 	}
 
-	QListView* l = dialog->findChild<QListView*>("listView");
+	QListView* l = dialog->findChild<QListView*>(QStringLiteral("listView"));
 	if (l)
 	{
 		l->setSelectionMode(QAbstractItemView::ExtendedSelection);
@@ -73,8 +73,8 @@ QString QtFileDialog::showSaveFileDialog(
 		dialog.setWindowModality(Qt::WindowModal);
 	}
 
-	QRegExp filter_regex(QLatin1String("(?:^\\*\\.(?!.*\\()|\\(\\*\\.)(\\w+)"));
-	QStringList filters = filter.split(QLatin1String(";;"));
+	QRegExp filter_regex(QStringLiteral("(?:^\\*\\.(?!.*\\()|\\(\\*\\.)(\\w+)"));
+	QStringList filters = filter.split(QStringLiteral(";;"));
 
 	if (!filters.isEmpty())
 	{
@@ -93,7 +93,7 @@ QString QtFileDialog::showSaveFileDialog(
 			if (filter_regex.indexIn(dialog.selectedNameFilter()) != -1)
 			{
 				QString extension = filter_regex.cap(1);
-				file_name += QLatin1String(".") + extension;
+				file_name += QStringLiteral(".") + extension;
 			}
 		}
 		return file_name;

src/lib_gui/qt/utility/QtFilesAndDirectoriesDialog.cpp

@@ -13,7 +13,7 @@ QtFilesAndDirectoriesDialog::QtFilesAndDirectoriesDialog(QWidget* parent): QFile
 	setOption(QFileDialog::DontUseNativeDialog, true);
 	for (QPushButton* button: findChildren<QPushButton*>())
 	{
-		if (button->text().toLower().contains("open") || button->text().toLower().contains("choose"))
+		if (button->text().toLower().contains(QLatin1String("open")) || button->text().toLower().contains(QLatin1String("choose")))
 		{
 			button->installEventFilter(this);
 			button->disconnect(SIGNAL(clicked()));

src/lib_gui/qt/utility/QtHighlighter.cpp

@@ -119,11 +119,11 @@ void QtHighlighter::loadHighlightingRules()
 			QJsonObject ruleObj = value.toObject();
 
 			HighlightType type = highlightTypeFromString(
-				ruleObj.value("type").toString().toStdString());
+				ruleObj.value(QStringLiteral("type")).toString().toStdString());
 
-			bool priority = ruleObj.value("priority").toBool();
+			bool priority = ruleObj.value(QStringLiteral("priority")).toBool();
 
-			QJsonArray patterns = ruleObj.value("patterns").toArray();
+			QJsonArray patterns = ruleObj.value(QStringLiteral("patterns")).toArray();
 			for (QJsonValueRef pattern: patterns)
 			{
 				if (pattern.isString())
@@ -132,7 +132,7 @@ void QtHighlighter::loadHighlightingRules()
 				}
 			}
 
-			QJsonObject range = ruleObj.value("range").toObject();
+			QJsonObject range = ruleObj.value(QStringLiteral("range")).toObject();
 			if (!range.empty())
 			{
 				rules.push_back(HighlightingRule(

src/lib_gui/qt/view/QtBookmarkButtonsView.cpp

@@ -18,7 +18,7 @@ QtBookmarkButtonsView::QtBookmarkButtonsView(ViewLayout* viewLayout)
 	: BookmarkButtonsView(viewLayout), m_createButtonState(MessageBookmarkButtonState::CANNOT_CREATE)
 {
 	m_widget = new QFrame();
-	m_widget->setObjectName("bookmark_bar");
+	m_widget->setObjectName(QStringLiteral("bookmark_bar"));
 
 	QBoxLayout* layout = new QHBoxLayout();
 	layout->setSpacing(0);
@@ -28,8 +28,8 @@ QtBookmarkButtonsView::QtBookmarkButtonsView(ViewLayout* viewLayout)
 
 	m_createBookmarkButton = new QtSearchBarButton(
 		ResourcePaths::getGuiPath().concatenate(L"bookmark_view/images/edit_bookmark_icon.png"));
-	m_createBookmarkButton->setObjectName("bookmark_button");
-	m_createBookmarkButton->setToolTip("create a bookmark for the active symbol");
+	m_createBookmarkButton->setObjectName(QStringLiteral("bookmark_button"));
+	m_createBookmarkButton->setToolTip(QStringLiteral("create a bookmark for the active symbol"));
 	m_createBookmarkButton->setEnabled(false);
 	layout->addWidget(m_createBookmarkButton);
 
@@ -41,8 +41,8 @@ QtBookmarkButtonsView::QtBookmarkButtonsView(ViewLayout* viewLayout)
 
 	m_showBookmarksButton = new QtSearchBarButton(
 		ResourcePaths::getGuiPath().concatenate(L"bookmark_view/images/bookmark_list_icon.png"));
-	m_showBookmarksButton->setObjectName("show_bookmark_button");
-	m_showBookmarksButton->setToolTip("Show bookmarks");
+	m_showBookmarksButton->setObjectName(QStringLiteral("show_bookmark_button"));
+	m_showBookmarksButton->setToolTip(QStringLiteral("Show bookmarks"));
 	layout->addWidget(m_showBookmarksButton);
 
 	connect(
@@ -105,11 +105,11 @@ void QtBookmarkButtonsView::createBookmarkClicked()
 	else if (m_createButtonState == MessageBookmarkButtonState::ALREADY_CREATED)
 	{
 		QMessageBox msgBox;
-		msgBox.setText("Edit Bookmark");
-		msgBox.setInformativeText("Do you want to edit or delete the bookmark for this symbol?");
-		msgBox.addButton("Edit", QMessageBox::ButtonRole::YesRole);
-		msgBox.addButton("Delete", QMessageBox::ButtonRole::NoRole);
-		QPushButton* cancelButton = msgBox.addButton("Cancel", QMessageBox::ButtonRole::RejectRole);
+		msgBox.setText(QStringLiteral("Edit Bookmark"));
+		msgBox.setInformativeText(QStringLiteral("Do you want to edit or delete the bookmark for this symbol?"));
+		msgBox.addButton(QStringLiteral("Edit"), QMessageBox::ButtonRole::YesRole);
+		msgBox.addButton(QStringLiteral("Delete"), QMessageBox::ButtonRole::NoRole);
+		QPushButton* cancelButton = msgBox.addButton(QStringLiteral("Cancel"), QMessageBox::ButtonRole::RejectRole);
 		msgBox.setDefaultButton(cancelButton);
 		msgBox.setIcon(QMessageBox::Icon::Question);
 		int ret = msgBox.exec();

src/lib_gui/qt/view/QtCustomTrailView.cpp

@@ -24,7 +24,7 @@ QtCustomTrailView::QtCustomTrailView(ViewLayout* viewLayout)
 	, CustomTrailView(nullptr)
 	, m_controllerProxy(this, TabId::app())
 {
-	setWindowTitle("Custom Trail");
+	setWindowTitle(QStringLiteral("Custom Trail"));
 	setWindowFlags(Qt::Window);
 
 	QGridLayout* mainLayout = new QGridLayout();
@@ -40,13 +40,13 @@ QtCustomTrailView::QtCustomTrailView(ViewLayout* viewLayout)
 	QWidget* panelC2 = new QWidget();
 	QWidget* panelD = new QWidget();
 
-	panelA1->setObjectName("panelA");
-	panelA2->setObjectName("panelA");
-	panelB1->setObjectName("panelB");
-	panelB2->setObjectName("panelB");
-	panelC1->setObjectName("panelA");
-	panelC2->setObjectName("panelA");
-	panelD->setObjectName("panelB2");
+	panelA1->setObjectName(QStringLiteral("panelA"));
+	panelA2->setObjectName(QStringLiteral("panelA"));
+	panelB1->setObjectName(QStringLiteral("panelB"));
+	panelB2->setObjectName(QStringLiteral("panelB"));
+	panelC1->setObjectName(QStringLiteral("panelA"));
+	panelC2->setObjectName(QStringLiteral("panelA"));
+	panelD->setObjectName(QStringLiteral("panelB2"));
 
 	mainLayout->addWidget(panelA1, 0, 0);
 	mainLayout->addWidget(panelA2, 0, 1);
@@ -62,10 +62,10 @@ QtCustomTrailView::QtCustomTrailView(ViewLayout* viewLayout)
 		hLayout->setContentsMargins(25, 10, 10, 10);
 		panelA1->setLayout(hLayout);
 
-		m_searchBoxFrom = new QtSmartSearchBox("Start Symbol", false);
-		m_searchBoxTo = new QtSmartSearchBox("Target Symbol", false);
+		m_searchBoxFrom = new QtSmartSearchBox(QStringLiteral("Start Symbol"), false);
+		m_searchBoxTo = new QtSmartSearchBox(QStringLiteral("Target Symbol"), false);
 
-		hLayout->addWidget(new QLabel("From:"));
+		hLayout->addWidget(new QLabel(QStringLiteral("From:")));
 		hLayout->addWidget(createSearchBox(m_searchBoxFrom));
 		hLayout->addSpacing(15);
 
@@ -130,11 +130,11 @@ QtCustomTrailView::QtCustomTrailView(ViewLayout* viewLayout)
 		hLayout->setContentsMargins(25, 10, 10, 10);
 		panelB1->setLayout(hLayout);
 
-		hLayout->addWidget(new QLabel("Max Depth:"));
+		hLayout->addWidget(new QLabel(QStringLiteral("Max Depth:")));
 
 		m_slider = new QSlider(Qt::Horizontal);
-		m_slider->setObjectName("depth_slider");
-		m_slider->setToolTip("adjust graph depth");
+		m_slider->setObjectName(QStringLiteral("depth_slider"));
+		m_slider->setToolTip(QStringLiteral("adjust graph depth"));
 		m_slider->setMinimum(1);
 		m_slider->setMaximum(51);
 		m_slider->setMinimumWidth(150);
@@ -149,7 +149,7 @@ QtCustomTrailView::QtCustomTrailView(ViewLayout* viewLayout)
 		connect(m_slider, &QSlider::valueChanged, [this, valueLabel](int) {
 			if (m_slider->value() == m_slider->maximum())
 			{
-				valueLabel->setText("inf");
+				valueLabel->setText(QStringLiteral("inf"));
 			}
 			else
 			{
@@ -167,12 +167,12 @@ QtCustomTrailView::QtCustomTrailView(ViewLayout* viewLayout)
 		hLayout->setSpacing(15);
 		panelB2->setLayout(hLayout);
 
-		m_horizontalButton = new QRadioButton("Horizontal");
-		m_verticalButton = new QRadioButton("Vertical");
+		m_horizontalButton = new QRadioButton(QStringLiteral("Horizontal"));
+		m_verticalButton = new QRadioButton(QStringLiteral("Vertical"));
 
 		m_horizontalButton->setChecked(true);
 
-		hLayout->addWidget(new QLabel("Layout Direction:"));
+		hLayout->addWidget(new QLabel(QStringLiteral("Layout Direction:")));
 		hLayout->addWidget(m_horizontalButton);
 		hLayout->addWidget(m_verticalButton);
 
@@ -219,7 +219,7 @@ QtCustomTrailView::QtCustomTrailView(ViewLayout* viewLayout)
 				QColor(scheme->getNodeTypeColor(t, "fill", ColorScheme::FOCUS).c_str()));
 		}
 
-		QVBoxLayout* filterLayout = addFilters("Nodes:", nodeFilters, nodeColors, &m_nodeFilters, 11);
+		QVBoxLayout* filterLayout = addFilters(QStringLiteral("Nodes:"), nodeFilters, nodeColors, &m_nodeFilters, 11);
 		filterLayout->setContentsMargins(25, 10, 25, 10);
 		panelC1->setLayout(filterLayout);
 	}
@@ -255,24 +255,24 @@ QtCustomTrailView::QtCustomTrailView(ViewLayout* viewLayout)
 			edgeColors.push_back(QColor(scheme->getEdgeTypeColor(t, ColorScheme::FOCUS).c_str()));
 		}
 
-		QVBoxLayout* filterLayout = addFilters("Edges:", edgeFilters, edgeColors, &m_edgeFilters, 5);
+		QVBoxLayout* filterLayout = addFilters(QStringLiteral("Edges:"), edgeFilters, edgeColors, &m_edgeFilters, 5);
 		filterLayout->setContentsMargins(10, 10, 25, 10);
 		panelC2->setLayout(filterLayout);
 	}
 
 	// controls
 	{
-		QPushButton* cancelButton = new QPushButton("Cancel");
-		QPushButton* searchButton = new QPushButton("Search");
+		QPushButton* cancelButton = new QPushButton(QStringLiteral("Cancel"));
+		QPushButton* searchButton = new QPushButton(QStringLiteral("Search"));
 
-		cancelButton->setObjectName("button");
-		searchButton->setObjectName("button");
+		cancelButton->setObjectName(QStringLiteral("button"));
+		searchButton->setObjectName(QStringLiteral("button"));
 
 		cancelButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);	// fixes layouting on Mac
 		searchButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);	// fixes layouting on Mac
 
 		m_errorLabel = new QLabel();
-		m_errorLabel->setObjectName("error");
+		m_errorLabel->setObjectName(QStringLiteral("error"));
 
 		QHBoxLayout* hLayout = new QHBoxLayout();
 		hLayout->setContentsMargins(25, 15, 25, 15);
@@ -289,7 +289,7 @@ QtCustomTrailView::QtCustomTrailView(ViewLayout* viewLayout)
 			if (m_searchBoxFrom->getMatches().size() == 0 ||
 				m_searchBoxFrom->getMatches().front().tokenIds.size() == 0)
 			{
-				setError("No 'Start Symbol' symbol found.");
+				setError(QStringLiteral("No 'Start Symbol' symbol found."));
 				return;
 			}
 
@@ -309,7 +309,7 @@ QtCustomTrailView::QtCustomTrailView(ViewLayout* viewLayout)
 				}
 				else
 				{
-					setError("No 'Target Symbol' symbol found.");
+					setError(QStringLiteral("No 'Target Symbol' symbol found."));
 					return;
 				}
 			}
@@ -319,13 +319,13 @@ QtCustomTrailView::QtCustomTrailView(ViewLayout* viewLayout)
 
 			if (!nodeTypes)
 			{
-				setError("No 'Nodes' selected.");
+				setError(QStringLiteral("No 'Nodes' selected."));
 				return;
 			}
 
 			if (!edgeTypes)
 			{
-				setError("No 'Edges' selected.");
+				setError(QStringLiteral("No 'Edges' selected."));
 				return;
 			}
 
@@ -340,7 +340,7 @@ QtCustomTrailView::QtCustomTrailView(ViewLayout* viewLayout)
 
 			m_controllerProxy.executeAsTaskWithArgs(&CustomTrailController::activateTrail, message);
 
-			setError("");
+			setError(QLatin1String(""));
 
 			hide();
 		});
@@ -464,7 +464,7 @@ void QtCustomTrailView::updateStyleSheet()
 QWidget* QtCustomTrailView::createSearchBox(QtSmartSearchBox* searchBox) const
 {
 	QWidget* searchBoxContainer = new QWidget();
-	searchBoxContainer->setObjectName("search_box_container");
+	searchBoxContainer->setObjectName(QStringLiteral("search_box_container"));
 	searchBoxContainer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Maximum);
 	searchBox->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Maximum);
 
@@ -516,7 +516,7 @@ QVBoxLayout* QtCustomTrailView::addFilters(
 
 	if (checkBoxes == &m_nodeFilters)
 	{
-		m_nodeNonIndexed = new QCheckBox("non-indexed");
+		m_nodeNonIndexed = new QCheckBox(QStringLiteral("non-indexed"));
 		m_nodeNonIndexed->setChecked(true);
 		checkBoxes->push_back(m_nodeNonIndexed);
 
@@ -525,7 +525,7 @@ QVBoxLayout* QtCustomTrailView::addFilters(
 	}
 	else if (checkBoxes == &m_edgeFilters)
 	{
-		m_edgeMember = new QCheckBox("member");
+		m_edgeMember = new QCheckBox(QStringLiteral("member"));
 		m_edgeMember->setChecked(true);
 		checkBoxes->push_back(m_edgeMember);
 
@@ -546,11 +546,11 @@ QHBoxLayout* QtCustomTrailView::addCheckButtons(const std::vector<QCheckBox*>& c
 {
 	QHBoxLayout* buttonLayout = new QHBoxLayout();
 
-	QPushButton* checkButton = new QPushButton("Check All");
-	QPushButton* uncheckButton = new QPushButton("Uncheck All");
+	QPushButton* checkButton = new QPushButton(QStringLiteral("Check All"));
+	QPushButton* uncheckButton = new QPushButton(QStringLiteral("Uncheck All"));
 
-	checkButton->setObjectName("button_small");
-	uncheckButton->setObjectName("button_small");
+	checkButton->setObjectName(QStringLiteral("button_small"));
+	uncheckButton->setObjectName(QStringLiteral("button_small"));
 
 	buttonLayout->addWidget(checkButton);
 	buttonLayout->addWidget(uncheckButton);

src/lib_gui/qt/view/QtDialogView.cpp

@@ -249,7 +249,7 @@ void QtDialogView::updateCustomIndexingDialog(
 			m_windowStack.getTopWindow());
 		if (window)
 		{
-			window->updateTitle("Executing Commands");
+			window->updateTitle(QStringLiteral("Executing Commands"));
 		}
 	});
 }

src/lib_gui/qt/view/QtErrorView.cpp

@@ -57,13 +57,13 @@ QtErrorView::QtErrorView(ViewLayout* viewLayout)
 	m_table->setColumnHidden(Column::ID, true);
 
 	QStringList headers;
-	headers << "ID"
-			<< "Type"
-			<< "Message"
-			<< "File"
-			<< "Line"
-			<< "Indexed"
-			<< "Translation Unit";
+	headers << QStringLiteral("ID")
+			<< QStringLiteral("Type")
+			<< QStringLiteral("Message")
+			<< QStringLiteral("File")
+			<< QStringLiteral("Line")
+			<< QStringLiteral("Indexed")
+			<< QStringLiteral("Translation Unit");
 	m_model->setHorizontalHeaderLabels(headers);
 
 	connect(m_table, &QTableView::clicked, [=](const QModelIndex& index) {
@@ -88,16 +88,16 @@ QtErrorView::QtErrorView(ViewLayout* viewLayout)
 	checkboxes->setSpacing(0);
 
 	{
-		m_showFatals = createFilterCheckbox("Fatals", m_errorFilter.fatal, checkboxes);
-		m_showErrors = createFilterCheckbox("Errors", m_errorFilter.error, checkboxes);
+		m_showFatals = createFilterCheckbox(QStringLiteral("Fatals"), m_errorFilter.fatal, checkboxes);
+		m_showErrors = createFilterCheckbox(QStringLiteral("Errors"), m_errorFilter.error, checkboxes);
 		m_showNonIndexedFatals = createFilterCheckbox(
-			"Fatals in non-indexed files", m_errorFilter.unindexedFatal, checkboxes);
+			QStringLiteral("Fatals in non-indexed files"), m_errorFilter.unindexedFatal, checkboxes);
 		m_showNonIndexedErrors = createFilterCheckbox(
-			"Errors in non-indexed files", m_errorFilter.unindexedError, checkboxes);
+			QStringLiteral("Errors in non-indexed files"), m_errorFilter.unindexedError, checkboxes);
 
 		m_helpButton = new QtHelpButton(
-			"Fixing Errors",
-			"Please read this if your project is showing errors after indexing.<br />"
+			QStringLiteral("Fixing Errors"),
+			QStringLiteral("Please read this if your project is showing errors after indexing.<br />"
 			"There are different types of errors:"
 			"<ul>"
 			"<li><b>Fatals</b> cause the indexer to stop. All or big parts of indexed information "
@@ -121,22 +121,22 @@ QtErrorView::QtErrorView(ViewLayout* viewLayout)
 			"</ul>"
 			"You should be able to find information about errors you are not familiar with online. "
 			"<b>Double click</b> "
-			"an error message in the table to select it for <b>copying</b>.<br />");
-		m_helpButton->setObjectName("help_button");
+			"an error message in the table to select it for <b>copying</b>.<br />"));
+		m_helpButton->setObjectName(QStringLiteral("help_button"));
 		checkboxes->addWidget(m_helpButton);
 	}
 
 	checkboxes->addStretch();
 
 	{
-		m_allLabel = new QLabel("");
+		m_allLabel = new QLabel(QLatin1String(""));
 		checkboxes->addWidget(m_allLabel);
 		m_allLabel->hide();
 
 		checkboxes->addSpacing(5);
 
-		m_allButton = new QPushButton("");
-		m_allButton->setObjectName("screen_button");
+		m_allButton = new QPushButton(QLatin1String(""));
+		m_allButton->setObjectName(QStringLiteral("screen_button"));
 		connect(m_allButton, &QPushButton::clicked, [=]() {
 			m_errorFilter.limit = 0;
 			errorFilterChanged();
@@ -144,7 +144,7 @@ QtErrorView::QtErrorView(ViewLayout* viewLayout)
 		checkboxes->addWidget(m_allButton);
 		m_allButton->hide();
 
-		m_errorLabel = new QLabel("");
+		m_errorLabel = new QLabel(QLatin1String(""));
 		checkboxes->addWidget(m_errorLabel);
 	}
 
@@ -152,11 +152,11 @@ QtErrorView::QtErrorView(ViewLayout* viewLayout)
 
 	{
 		m_editButton = new QtSelfRefreshIconButton(
-			"Edit Project",
+			QStringLiteral("Edit Project"),
 			ResourcePaths::getGuiPath().concatenate(L"code_view/images/edit.png"),
 			"window/button");
-		m_editButton->setObjectName("screen_button");
-		m_editButton->setToolTip("edit project");
+		m_editButton->setObjectName(QStringLiteral("screen_button"));
+		m_editButton->setToolTip(QStringLiteral("edit project"));
 		connect(m_editButton, &QPushButton::clicked, []() { MessageProjectEdit().dispatch(); });
 
 		checkboxes->addWidget(m_editButton);
@@ -222,7 +222,7 @@ void QtErrorView::addErrors(
 		m_errorLabel->setText(
 			"<b>displaying " + QString::number(errorCount.total) + " error" +
 			(errorCount.total != 1 ? "s" : "") +
-			(errorCount.fatal > 0 ? " (" + QString::number(errorCount.fatal) + " fatal)" : "") +
+			(errorCount.fatal > 0 ? " (" + QString::number(errorCount.fatal) + " fatal)" : QLatin1String("")) +
 			"</b>");
 	});
 }
@@ -279,6 +279,7 @@ void QtErrorView::setErrorFilter(const ErrorFilter& filter)
 
 void QtErrorView::errorFilterChanged(int i)
 {
+	Q_UNUSED(i)
 	m_table->selectionModel()->clearSelection();
 
 	m_errorFilter.error = m_showErrors->isChecked();
@@ -327,7 +328,8 @@ void QtErrorView::addErrorToTable(const ErrorInfo& error)
 	item->setData(QVariant(qlonglong(error.id)), Qt::DisplayRole);
 	m_model->setItem(rowNumber, Column::ID, item);
 
-	m_model->setItem(rowNumber, Column::TYPE, new QStandardItem(error.fatal ? "FATAL" : "ERROR"));
+	m_model->setItem(rowNumber, Column::TYPE, new QStandardItem(error.fatal ?
+												QStringLiteral("FATAL") : QStringLiteral("ERROR")));
 	if (error.fatal)
 	{
 		m_model->item(rowNumber, Column::TYPE)->setForeground(QBrush(Qt::red));
@@ -345,7 +347,8 @@ void QtErrorView::addErrorToTable(const ErrorInfo& error)
 	item->setData(QVariant(qlonglong(error.lineNumber)), Qt::DisplayRole);
 	m_model->setItem(rowNumber, Column::LINE, item);
 
-	m_model->setItem(rowNumber, Column::INDEXED, new QStandardItem(error.indexed ? "yes" : "no"));
+	m_model->setItem(rowNumber, Column::INDEXED, new QStandardItem(error.indexed ?
+													QStringLiteral("yes") : QStringLiteral("no")));
 
 	m_model->setItem(
 		rowNumber,

src/lib_gui/qt/view/QtGraphView.cpp

@@ -80,11 +80,11 @@ QtGraphView::QtGraphView(ViewLayout* viewLayout)
 
 		{
 			m_expandButton = new QtSelfRefreshIconButton(
-				"",
+				QLatin1String(""),
 				ResourcePaths::getGuiPath().concatenate(L"graph_view/images/graph.png"),
 				"search/button");
-			m_expandButton->setObjectName("expand_button");
-			m_expandButton->setToolTip("show trail controls");
+			m_expandButton->setObjectName(QStringLiteral("expand_button"));
+			m_expandButton->setToolTip(QStringLiteral("show trail controls"));
 			m_expandButton->setIconSize(QSize(16, 16));
 			m_expandButton->setGeometry(0, 0, 26, 26);
 			connect(m_expandButton, &QPushButton::clicked, this, &QtGraphView::clickedExpand);
@@ -97,44 +97,44 @@ QtGraphView::QtGraphView(ViewLayout* viewLayout)
 			stack->addWidget(ui);
 
 			m_collapseButton = new QtSelfRefreshIconButton(
-				"",
+				QLatin1String(""),
 				ResourcePaths::getGuiPath().concatenate(L"graph_view/images/graph_arrow.png"),
 				"search/button",
 				ui);
-			m_collapseButton->setObjectName("collapse_button");
-			m_collapseButton->setToolTip("hide trail controls");
+			m_collapseButton->setObjectName(QStringLiteral("collapse_button"));
+			m_collapseButton->setToolTip(QStringLiteral("hide trail controls"));
 			m_collapseButton->setIconSize(QSize(16, 16));
 			connect(m_collapseButton, &QPushButton::clicked, this, &QtGraphView::clickedCollapse);
 
-			m_customTrailButton = new QtSelfRefreshIconButton("", FilePath(), "search/button", ui);
-			m_customTrailButton->setObjectName("trail_button");
+			m_customTrailButton = new QtSelfRefreshIconButton(QLatin1String(""), FilePath(), "search/button", ui);
+			m_customTrailButton->setObjectName(QStringLiteral("trail_button"));
 			m_customTrailButton->setIconSize(QSize(16, 16));
-			m_customTrailButton->setToolTip("custom trail");
+			m_customTrailButton->setToolTip(QStringLiteral("custom trail"));
 			m_customTrailButton->setIconPath(
 				ResourcePaths::getGuiPath().concatenate(L"graph_view/images/graph_custom.png"));
 			connect(
 				m_customTrailButton, &QPushButton::clicked, this, &QtGraphView::clickedCustomTrail);
 
-			m_forwardTrailButton = new QtSelfRefreshIconButton("", FilePath(), "search/button", ui);
-			m_forwardTrailButton->setObjectName("trail_button");
+			m_forwardTrailButton = new QtSelfRefreshIconButton(QLatin1String(""), FilePath(), "search/button", ui);
+			m_forwardTrailButton->setObjectName(QStringLiteral("trail_button"));
 			m_forwardTrailButton->setIconSize(QSize(16, 16));
 			connect(
 				m_forwardTrailButton, &QPushButton::clicked, this, &QtGraphView::clickedForwardTrail);
 
-			m_backwardTrailButton = new QtSelfRefreshIconButton("", FilePath(), "search/button", ui);
-			m_backwardTrailButton->setObjectName("trail_button");
+			m_backwardTrailButton = new QtSelfRefreshIconButton(QLatin1String(""), FilePath(), "search/button", ui);
+			m_backwardTrailButton->setObjectName(QStringLiteral("trail_button"));
 			m_backwardTrailButton->setIconSize(QSize(16, 16));
 			connect(
 				m_backwardTrailButton, &QPushButton::clicked, this, &QtGraphView::clickedBackwardTrail);
 
 			m_trailDepthLabel = new QLabel(ui);
-			m_trailDepthLabel->setObjectName("depth_label");
-			m_trailDepthLabel->setToolTip("adjust trail depth");
+			m_trailDepthLabel->setObjectName(QStringLiteral("depth_label"));
+			m_trailDepthLabel->setToolTip(QStringLiteral("adjust trail depth"));
 			m_trailDepthLabel->setAlignment(Qt::AlignCenter);
 
 			m_trailDepthSlider = new QSlider(Qt::Vertical, ui);
-			m_trailDepthSlider->setObjectName("depth_slider");
-			m_trailDepthSlider->setToolTip("adjust trail depth");
+			m_trailDepthSlider->setObjectName(QStringLiteral("depth_slider"));
+			m_trailDepthSlider->setToolTip(QStringLiteral("adjust trail depth"));
 			m_trailDepthSlider->setMinimum(1);
 			m_trailDepthSlider->setMaximum(26);
 			m_trailDepthSlider->setValue(5);
@@ -171,19 +171,19 @@ QtGraphView::QtGraphView(ViewLayout* viewLayout)
 	// group controls
 	{
 		m_groupFileButton = new QtSelfRefreshIconButton(
-			"",
+			QLatin1String(""),
 			ResourcePaths::getGuiPath().concatenate(L"graph_view/images/file.png"),
 			"search/button");
 		m_groupNamespaceButton = new QtSelfRefreshIconButton(
-			"",
+			QLatin1String(""),
 			ResourcePaths::getGuiPath().concatenate(L"graph_view/images/group_namespace.png"),
 			"search/button");
 
-		m_groupFileButton->setObjectName("group_right_button");
-		m_groupNamespaceButton->setObjectName("group_left_button");
+		m_groupFileButton->setObjectName(QStringLiteral("group_right_button"));
+		m_groupNamespaceButton->setObjectName(QStringLiteral("group_left_button"));
 
-		m_groupFileButton->setToolTip("group by file");
-		m_groupNamespaceButton->setToolTip("group by package/namespace/module");
+		m_groupFileButton->setToolTip(QStringLiteral("group by file"));
+		m_groupNamespaceButton->setToolTip(QStringLiteral("group by package/namespace/module"));
 
 		m_groupFileButton->setCheckable(true);
 		m_groupNamespaceButton->setCheckable(true);
@@ -702,7 +702,7 @@ void QtGraphView::trailDepthChanged(int)
 {
 	if (m_trailDepthSlider->value() == m_trailDepthSlider->maximum())
 	{
-		m_trailDepthLabel->setText("inf");
+		m_trailDepthLabel->setText(QStringLiteral("inf"));
 	}
 	else
 	{
@@ -849,26 +849,26 @@ void QtGraphView::updateTrailButtons()
 
 	if (message.edgeTypes & Edge::EDGE_CALL)
 	{
-		m_backwardTrailButton->setToolTip("show caller graph");
-		m_forwardTrailButton->setToolTip("show callee graph");
+		m_backwardTrailButton->setToolTip(QStringLiteral("show caller graph"));
+		m_forwardTrailButton->setToolTip(QStringLiteral("show callee graph"));
 	}
 	else if (message.edgeTypes & Edge::EDGE_INHERITANCE)
 	{
-		m_backwardTrailButton->setToolTip("show base hierarchy");
-		m_forwardTrailButton->setToolTip("show derived hierarchy");
+		m_backwardTrailButton->setToolTip(QStringLiteral("show base hierarchy"));
+		m_forwardTrailButton->setToolTip(QStringLiteral("show derived hierarchy"));
 
 		backwardImagePath = L"graph_up.png";
 		forwardImagePath = L"graph_down.png";
 	}
 	else if (message.edgeTypes & Edge::EDGE_INCLUDE)
 	{
-		m_backwardTrailButton->setToolTip("show including files hierarchy");
-		m_forwardTrailButton->setToolTip("show included files hierarchy");
+		m_backwardTrailButton->setToolTip(QStringLiteral("show including files hierarchy"));
+		m_forwardTrailButton->setToolTip(QStringLiteral("show included files hierarchy"));
 	}
 	else
 	{
-		m_backwardTrailButton->setToolTip("no trail for active symbol");
-		m_forwardTrailButton->setToolTip("no trail for active symbol");
+		m_backwardTrailButton->setToolTip(QStringLiteral("no trail for active symbol"));
+		m_forwardTrailButton->setToolTip(QStringLiteral("no trail for active symbol"));
 	}
 
 	m_forwardTrailButton->setIconPath(
@@ -945,7 +945,7 @@ QtGraphicsView* QtGraphView::getView() const
 {
 	QWidget* widget = QtViewWidgetWrapper::getWidgetOfView(this);
 
-	QtGraphicsView* view = widget->findChild<QtGraphicsView*>("");
+	QtGraphicsView* view = widget->findChild<QtGraphicsView*>(QLatin1String(""));
 
 	if (!view)
 	{
@@ -1308,7 +1308,7 @@ void QtGraphView::createTransition()
 
 		for (QtGraphNode* node: vanishingNodes)
 		{
-			QPropertyAnimation* anim = new QPropertyAnimation(node, "opacity");
+			QPropertyAnimation* anim = new QPropertyAnimation(node, QByteArrayLiteral("opacity"));
 			anim->setDuration(300);
 			anim->setStartValue(1.0f);
 			anim->setEndValue(0.0f);
@@ -1318,7 +1318,7 @@ void QtGraphView::createTransition()
 
 		for (QtGraphEdge* edge: m_oldEdges)
 		{
-			QPropertyAnimation* anim = new QPropertyAnimation(edge, "opacity");
+			QPropertyAnimation* anim = new QPropertyAnimation(edge, QByteArrayLiteral("opacity"));
 			anim->setDuration(150);
 			anim->setStartValue(1.0f);
 			anim->setEndValue(0.0f);
@@ -1338,7 +1338,7 @@ void QtGraphView::createTransition()
 			QtGraphNode* newNode = p.first;
 			QtGraphNode* oldNode = p.second;
 
-			QPropertyAnimation* anim = new QPropertyAnimation(oldNode, "pos");
+			QPropertyAnimation* anim = new QPropertyAnimation(oldNode, QByteArrayLiteral("pos"));
 			anim->setDuration(300);
 			anim->setStartValue(oldNode->pos());
 			anim->setEndValue(newNode->pos());
@@ -1349,7 +1349,7 @@ void QtGraphView::createTransition()
 			connect(anim, &QPropertyAnimation::finished, oldNode, &QtGraphNode::hideNode);
 			newNode->hide();
 
-			anim = new QPropertyAnimation(oldNode, "size");
+			anim = new QPropertyAnimation(oldNode, QByteArrayLiteral("size"));
 			anim->setDuration(300);
 			anim->setStartValue(oldNode->size());
 			anim->setEndValue(newNode->size());
@@ -1363,7 +1363,7 @@ void QtGraphView::createTransition()
 			}
 		}
 
-		QPropertyAnimation* anim = new QPropertyAnimation(view, "sceneRect");
+		QPropertyAnimation* anim = new QPropertyAnimation(view, QByteArrayLiteral("sceneRect"));
 		anim->setStartValue(view->sceneRect());
 		anim->setEndValue(getSceneRect(m_nodes));
 

src/lib_gui/qt/view/QtGraphViewStyleImpl.cpp

@@ -9,7 +9,7 @@
 float QtGraphViewStyleImpl::getCharWidth(const std::string& fontName, size_t fontSize)
 {
 	return QFontMetrics(getFontForStyleType(fontName, fontSize))
-			   .width("QtGraphNode::QtGraphNode::QtGraphNode") /
+			   .width(QStringLiteral("QtGraphNode::QtGraphNode::QtGraphNode")) /
 		37.0f;
 }
 

src/lib_gui/qt/view/QtRefreshView.cpp

@@ -14,7 +14,7 @@
 QtRefreshView::QtRefreshView(ViewLayout* viewLayout): RefreshView(viewLayout)
 {
 	m_widget = new QFrame();
-	m_widget->setObjectName("refresh_bar");
+	m_widget->setObjectName(QStringLiteral("refresh_bar"));
 
 	QBoxLayout* layout = new QHBoxLayout();
 	layout->setSpacing(0);
@@ -23,8 +23,8 @@ QtRefreshView::QtRefreshView(ViewLayout* viewLayout): RefreshView(viewLayout)
 
 	QtSearchBarButton* refreshButton = new QtSearchBarButton(
 		ResourcePaths::getGuiPath().concatenate(L"refresh_view/images/refresh.png"));
-	refreshButton->setObjectName("refresh_button");
-	refreshButton->setToolTip("refresh");
+	refreshButton->setObjectName(QStringLiteral("refresh_button"));
+	refreshButton->setToolTip(QStringLiteral("refresh"));
 	m_widget->connect(refreshButton, &QPushButton::clicked, []() {
 		MessageIndexingShowDialog().dispatch();
 		MessageRefresh().dispatch();

src/lib_gui/qt/view/QtScreenSearchView.cpp

@@ -16,7 +16,7 @@ QtScreenSearchView::QtScreenSearchView(ViewLayout* viewLayout)
 	m_widget = new QtScreenSearchBox(&m_controllerProxy);
 
 	m_bar = new QToolBar();
-	m_bar->setObjectName("screen_search_bar");
+	m_bar->setObjectName(QStringLiteral("screen_search_bar"));
 	m_bar->setMovable(false);
 	m_bar->addWidget(m_widget);
 

src/lib_gui/qt/view/QtStatusView.cpp

@@ -34,8 +34,8 @@ QtStatusView::QtStatusView(ViewLayout* viewLayout): StatusView(viewLayout)
 	// m_table->setColumnWidth(STATUSVIEW_COLUMN::STATUS, 150);
 
 	QStringList headers;
-	headers << "Type"
-			<< "Message";
+	headers << QStringLiteral("Type")
+			<< QStringLiteral("Message");
 	m_model->setHorizontalHeaderLabels(headers);
 
 	layout->addWidget(m_table);
@@ -46,13 +46,13 @@ QtStatusView::QtStatusView(ViewLayout* viewLayout): StatusView(viewLayout)
 	filters->setSpacing(25);
 
 	const StatusFilter filter = ApplicationSettings::getInstance()->getStatusFilter();
-	m_showInfo = createFilterCheckbox("Info", filters, filter & StatusType::STATUS_INFO);
-	m_showErrors = createFilterCheckbox("Error", filters, filter & StatusType::STATUS_ERROR);
+	m_showInfo = createFilterCheckbox(QStringLiteral("Info"), filters, filter & StatusType::STATUS_INFO);
+	m_showErrors = createFilterCheckbox(QStringLiteral("Error"), filters, filter & StatusType::STATUS_ERROR);
 
 	filters->addStretch();
 
-	QPushButton* clearButton = new QPushButton("Clear Table");
-	clearButton->setObjectName("screen_button");
+	QPushButton* clearButton = new QPushButton(QStringLiteral("Clear Table"));
+	clearButton->setObjectName(QStringLiteral("screen_button"));
 	connect(clearButton, &QPushButton::clicked, [=]() { MessageClearStatusView().dispatch(); });
 
 	filters->addWidget(clearButton);
@@ -107,7 +107,8 @@ void QtStatusView::addStatus(const std::vector<Status>& status)
 				m_model->insertRow(rowNumber);
 			}
 
-			QString statusType = (s.type == StatusType::STATUS_ERROR ? "ERROR" : "INFO");
+			QString statusType = (s.type == StatusType::STATUS_ERROR ?
+									  QStringLiteral("ERROR") : QStringLiteral("INFO"));
 			m_model->setItem(rowNumber, STATUSVIEW_COLUMN::TYPE, new QStandardItem(statusType));
 			m_model->setItem(
 				rowNumber,

src/lib_gui/qt/view/QtTabbedView.cpp

@@ -27,12 +27,12 @@ QtTabbedView::QtTabbedView(ViewLayout* viewLayout, const std::string& name)
 	layout->addWidget(m_widget);
 
 	m_closeButton = new QtSelfRefreshIconButton(
-		"",
+		QLatin1String(""),
 		ResourcePaths::getGuiPath().concatenate(L"screen_search_view/images/close.png"),
 		"screen_search/button",
 		widget);
 	m_closeButton->setIconSize(QSize(15, 15));
-	m_closeButton->setStyleSheet("background: transparent; border: none;");
+	m_closeButton->setStyleSheet(QStringLiteral("background: transparent; border: none;"));
 
 	widget->connect(m_closeButton, &QPushButton::clicked, [this]() { hideView(this); });
 	m_widget->tabBar()->installEventFilter(this);
@@ -49,7 +49,7 @@ void QtTabbedView::refreshView()
 void QtTabbedView::addViewWidget(View* view)
 {
 	QWidget* tabWidget = QtViewWidgetWrapper::getWidgetOfView(view);
-	tabWidget->setObjectName("tab_content");
+	tabWidget->setObjectName(QStringLiteral("tab_content"));
 	m_widget->addTab(tabWidget, view->getName().c_str());
 
 	setStyleSheet();

src/lib_gui/qt/view/QtTabsView.cpp

@@ -27,7 +27,7 @@ QtTabsView::QtTabsView(ViewLayout* viewLayout)
 
 	QWidget* front = new QWidget();
 	front->setMinimumWidth(5);
-	front->setObjectName("side_area");
+	front->setObjectName(QStringLiteral("side_area"));
 	layout->addWidget(front);
 
 	m_tabBar = new QtTabBar();
@@ -40,12 +40,12 @@ QtTabsView::QtTabsView(ViewLayout* viewLayout)
 	connect(m_tabBar, &QTabBar::currentChanged, this, &QtTabsView::changedTab);
 
 	QPushButton* addButton = new QtSelfRefreshIconButton(
-		"", ResourcePaths::getGuiPath().concatenate(L"tabs_view/images/add.png"), "tab/bar/button");
-	addButton->setObjectName("add_button");
+		QLatin1String(""), ResourcePaths::getGuiPath().concatenate(L"tabs_view/images/add.png"), "tab/bar/button");
+	addButton->setObjectName(QStringLiteral("add_button"));
 	addButton->setIconSize(QSize(14, 14));
 
 	QWidget* back = new QWidget();
-	back->setObjectName("side_area");
+	back->setObjectName(QStringLiteral("side_area"));
 	QHBoxLayout* backLayout = new QHBoxLayout(back);
 	backLayout->setContentsMargins(3, 0, 5, 0);
 	backLayout->setSpacing(0);
@@ -141,11 +141,11 @@ void QtTabsView::insertTab(bool showTab, SearchMatch match)
 
 	m_insertedTabCount++;
 	int idx = match.isValid() ? m_tabBar->currentIndex() + m_insertedTabCount : m_tabBar->count() + 1;
-	idx = m_tabBar->insertTab(idx, " Empty Tab ");
+	idx = m_tabBar->insertTab(idx, QStringLiteral(" Empty Tab "));
 	m_tabBar->setTabData(idx, QVariant(tabId));
 
 	QPushButton* typeCircle = new QPushButton();
-	typeCircle->setObjectName("type_circle");
+	typeCircle->setObjectName(QStringLiteral("type_circle"));
 	m_tabBar->setTabButton(idx, QTabBar::LeftSide, typeCircle);
 
 	connect(typeCircle, &QPushButton::clicked, [tabId, this]() {
@@ -160,10 +160,10 @@ void QtTabsView::insertTab(bool showTab, SearchMatch match)
 	});
 
 	QPushButton* closeButton = new QtSelfRefreshIconButton(
-		"",
+		QLatin1String(""),
 		ResourcePaths::getGuiPath().concatenate(L"tabs_view/images/close.png"),
 		"tab/bar/button");
-	closeButton->setObjectName("close_button");
+	closeButton->setObjectName(QStringLiteral("close_button"));
 	closeButton->setIconSize(QSize(10, 10));
 	m_tabBar->setTabButton(idx, QTabBar::RightSide, closeButton);
 
@@ -257,10 +257,10 @@ void QtTabsView::setTabState(int idx, const std::vector<SearchMatch>& matches)
 	m_tabBar->setTabText(idx, ' ' + QString::fromStdWString(name) + ' ');
 	m_tabBar->tabButton(idx, QTabBar::LeftSide)
 		->setStyleSheet(
-			"#type_circle { background-color: " + QString::fromStdString(color) +
-			"; } "
-			"#type_circle[selected=true] { background-color: " +
-			QString::fromStdString(activeColor) + "; } ");
+			QStringLiteral("#type_circle { background-color: ") + QString::fromStdString(color) +
+			QStringLiteral("; } "
+			"#type_circle[selected=true] { background-color: ") +
+			QString::fromStdString(activeColor) + QStringLiteral("; } "));
 }
 
 void QtTabsView::setStyleSheet()

src/lib_gui/qt/window/QtAbout.cpp

@@ -68,42 +68,42 @@ void QtAbout::setupAbout()
 		windowLayout->addLayout(layoutHorz1);
 
 		QLabel* companyLabel = new QLabel(
-			"<b>Coati Software KG</b><br />"
+			QStringLiteral("<b>Coati Software KG</b><br />"
 			"Jakob-Haringer-Straße 1/127<br />"
 			"5020 Salzburg<br />"
 			"Austria<br />"
 			"<b>support@sourcetrail.com</b><br />"
 			"<b><a href=\"https://sourcetrail.com\" style=\"color: "
-			"white;\">sourcetrail.com</a></b>");
+			"white;\">sourcetrail.com</a></b>"));
 		companyLabel->setOpenExternalLinks(true);
 		layoutHorz1->addWidget(companyLabel);
 
 		layoutHorz1->addSpacing(120);
 
 		QLabel* developerLabel = new QLabel(
-			"<br /><br />"
+			QStringLiteral("<br /><br />"
 			"<b>Team:</b><br />"
 			"Manuel Dobusch<br />"
 			"Eberhard Gräther<br />"
 			"Malte Langkabel<br />"
 			"Viktoria Pfausler<br />"
-			"Andreas Stallinger<br />");
-		developerLabel->setObjectName("small");
+			"Andreas Stallinger<br />"));
+		developerLabel->setObjectName(QStringLiteral("small"));
 		layoutHorz1->addWidget(developerLabel);
 	}
 
 	windowLayout->addStretch();
 
 	QLabel* acknowledgementsLabel = new QLabel(
-		"<b>Acknowledgements:</b><br />"
+		QStringLiteral("<b>Acknowledgements:</b><br />"
 		"Sourcetrail (aka Coati) 0.1 was created in the context of education at "
 		"<a href=\"http://www.fh-salzburg.ac.at/en/\" style=\"color: white;\">Salzburg University "
 		"of Applied Sciences</a>.<br />"
 		"Coati Software KG is member of <a href=\"http://www.startup-salzburg.at/\" style=\"color: "
 		"white;\">Startup Salzburg</a>.<br />"
 		"The development of Sourcetrail was funded by <a href=\"http://awsg.at\" style=\"color: "
-		"white;\">aws</a>.");
-	acknowledgementsLabel->setObjectName("small");
+		"white;\">aws</a>."));
+	acknowledgementsLabel->setObjectName(QStringLiteral("small"));
 	acknowledgementsLabel->setWordWrap(true);
 	acknowledgementsLabel->setOpenExternalLinks(true);
 	windowLayout->addWidget(acknowledgementsLabel);

src/lib_gui/qt/window/QtBookmarkBrowser.cpp

@@ -27,7 +27,7 @@ void QtBookmarkBrowser::setupBookmarkBrowser()
 			.c_str());
 
 	m_headerBackground = new QWidget(m_window);
-	m_headerBackground->setObjectName("header_background");
+	m_headerBackground->setObjectName(QStringLiteral("header_background"));
 	m_headerBackground->setGeometry(0, 0, 0, 0);
 	m_headerBackground->lower();
 
@@ -46,21 +46,21 @@ void QtBookmarkBrowser::setupBookmarkBrowser()
 
 		headerLayout->addStrut(150);
 
-		QLabel* title = new QLabel("Bookmarks");
-		title->setObjectName("title");
+		QLabel* title = new QLabel(QStringLiteral("Bookmarks"));
+		title->setObjectName(QStringLiteral("title"));
 		headerLayout->addWidget(title);
 
 		headerLayout->addSpacing(40);
 
-		QLabel* filterLabel = new QLabel("Show:");
-		filterLabel->setObjectName("filter_label");
+		QLabel* filterLabel = new QLabel(QStringLiteral("Show:"));
+		filterLabel->setObjectName(QStringLiteral("filter_label"));
 		headerLayout->addWidget(filterLabel);
 
 		m_filterComboBox = new QComboBox();
-		m_filterComboBox->addItem("All");
-		m_filterComboBox->addItem("Nodes");
-		m_filterComboBox->addItem("Edges");
-		m_filterComboBox->setObjectName("filter_box");
+		m_filterComboBox->addItem(QStringLiteral("All"));
+		m_filterComboBox->addItem(QStringLiteral("Nodes"));
+		m_filterComboBox->addItem(QStringLiteral("Edges"));
+		m_filterComboBox->setObjectName(QStringLiteral("filter_box"));
 		headerLayout->addWidget(m_filterComboBox);
 
 		connect(
@@ -71,8 +71,8 @@ void QtBookmarkBrowser::setupBookmarkBrowser()
 
 		headerLayout->addSpacing(40);
 
-		QLabel* orderLabel = new QLabel("Sort by:");
-		orderLabel->setObjectName("order_label");
+		QLabel* orderLabel = new QLabel(QStringLiteral("Sort by:"));
+		orderLabel->setObjectName(QStringLiteral("order_label"));
 		headerLayout->addWidget(orderLabel);
 
 		m_orderNames.push_back("Name asc.");
@@ -86,7 +86,7 @@ void QtBookmarkBrowser::setupBookmarkBrowser()
 		m_orderComboBox->addItem(m_orderNames[2].c_str());
 		m_orderComboBox->addItem(m_orderNames[3].c_str());
 		m_orderComboBox->setCurrentIndex(3);
-		m_orderComboBox->setObjectName("order_box");
+		m_orderComboBox->setObjectName(QStringLiteral("order_box"));
 		headerLayout->addWidget(m_orderComboBox);
 
 		connect(
@@ -104,12 +104,12 @@ void QtBookmarkBrowser::setupBookmarkBrowser()
 		layout->addLayout(bodyLayout);
 
 		m_bookmarkTree = new QTreeWidget();
-		m_bookmarkTree->setObjectName("bookmark_tree");
+		m_bookmarkTree->setObjectName(QStringLiteral("bookmark_tree"));
 		m_bookmarkTree->setAttribute(Qt::WA_MacShowFocusRect, 0);
 		m_bookmarkTree->setSelectionMode(QAbstractItemView::SelectionMode::NoSelection);
 		m_bookmarkTree->header()->close();
 		m_bookmarkTree->setIndentation(0);
-		m_bookmarkTree->setHeaderLabel("Bookmarks");
+		m_bookmarkTree->setHeaderLabel(QStringLiteral("Bookmarks"));
 
 		connect(m_bookmarkTree, &QTreeWidget::itemClicked, this, &QtBookmarkBrowser::treeItemClicked);
 
@@ -122,7 +122,7 @@ void QtBookmarkBrowser::setupBookmarkBrowser()
 		bodyLayout->addLayout(buttonLayout);
 		setPreviousVisible(false);
 		setCloseVisible(false);
-		updateNextButton("Close");
+		updateNextButton(QStringLiteral("Close"));
 	}
 }
 

src/lib_gui/qt/window/QtBookmarkCreator.cpp

@@ -29,8 +29,9 @@ void QtBookmarkCreator::setupBookmarkCreator()
 
 	{
 		// title
-		QLabel* title = new QLabel(m_editBookmarkId ? "Edit Bookmark" : "Create Bookmark");
-		title->setObjectName("creator_title_label");
+		QLabel* title = new QLabel(m_editBookmarkId ?
+								QStringLiteral("Edit Bookmark") : QStringLiteral("Create Bookmark"));
+		title->setObjectName(QStringLiteral("creator_title_label"));
 		mainLayout->addWidget(title);
 	}
 
@@ -39,13 +40,13 @@ void QtBookmarkCreator::setupBookmarkCreator()
 
 	{
 		// name
-		QLabel* nameLabel = new QLabel("Name");
-		nameLabel->setObjectName("creator_label");
+		QLabel* nameLabel = new QLabel(QStringLiteral("Name"));
+		nameLabel->setObjectName(QStringLiteral("creator_label"));
 		layout->addWidget(nameLabel);
 
 		m_displayName = new QLineEdit();
-		m_displayName->setObjectName("creator_name_edit");
-		m_displayName->setPlaceholderText("Name");
+		m_displayName->setObjectName(QStringLiteral("creator_name_edit"));
+		m_displayName->setPlaceholderText(QStringLiteral("Name"));
 		m_displayName->setAttribute(Qt::WA_MacShowFocusRect, 0);
 		layout->addWidget(m_displayName);
 
@@ -56,13 +57,13 @@ void QtBookmarkCreator::setupBookmarkCreator()
 
 	{
 		// comment
-		QLabel* commentLabel = new QLabel("Comment");
-		commentLabel->setObjectName("creator_label");
+		QLabel* commentLabel = new QLabel(QStringLiteral("Comment"));
+		commentLabel->setObjectName(QStringLiteral("creator_label"));
 		layout->addWidget(commentLabel);
 
 		m_commentBox = new QTextEdit();
-		m_commentBox->setObjectName("creator_comment_box");
-		m_commentBox->setPlaceholderText("Comment");
+		m_commentBox->setObjectName(QStringLiteral("creator_comment_box"));
+		m_commentBox->setPlaceholderText(QStringLiteral("Comment"));
 		layout->addWidget(m_commentBox);
 
 		layout->addSpacing(15);
@@ -70,15 +71,15 @@ void QtBookmarkCreator::setupBookmarkCreator()
 
 	{
 		// category
-		QLabel* categoryLabel = new QLabel("Choose or Create Category");
-		categoryLabel->setObjectName("creator_label");
+		QLabel* categoryLabel = new QLabel(QStringLiteral("Choose or Create Category"));
+		categoryLabel->setObjectName(QStringLiteral("creator_label"));
 		layout->addWidget(categoryLabel);
 
 		m_categoryBox = new QComboBox();
-		m_categoryBox->setObjectName("creator_category_box");
-		m_categoryBox->addItem("");
+		m_categoryBox->setObjectName(QStringLiteral("creator_category_box"));
+		m_categoryBox->addItem(QLatin1String(""));
 		m_categoryBox->setEditable(true);
-		m_categoryBox->lineEdit()->setPlaceholderText("Category");
+		m_categoryBox->lineEdit()->setPlaceholderText(QStringLiteral("Category"));
 		m_categoryBox->setInsertPolicy(QComboBox::InsertPolicy::InsertAtTop);
 		layout->addWidget(m_categoryBox);
 
@@ -88,7 +89,7 @@ void QtBookmarkCreator::setupBookmarkCreator()
 	{
 		layout->addLayout(createButtons());
 		setPreviousVisible(false);
-		updateNextButton(m_editBookmarkId ? "Save" : "Create");
+		updateNextButton(m_editBookmarkId ? QStringLiteral("Save") : QStringLiteral("Create"));
 	}
 
 	mainLayout->addLayout(layout);

src/lib_gui/qt/window/QtIndexingDialog.cpp

@@ -9,10 +9,10 @@
 #include "ResourcePaths.h"
 #include "utilityQt.h"
 
-QLabel* QtIndexingDialog::createTitleLabel(QString title, QBoxLayout* layout)
+QLabel* QtIndexingDialog::createTitleLabel(const QString &title, QBoxLayout* layout)
 {
 	QLabel* label = new QLabel(title);
-	label->setObjectName("title");
+	label->setObjectName(QStringLiteral("title"));
 	label->setAlignment(Qt::AlignRight | Qt::AlignBottom);
 
 	if (layout)
@@ -26,7 +26,7 @@ QLabel* QtIndexingDialog::createTitleLabel(QString title, QBoxLayout* layout)
 QLabel* QtIndexingDialog::createMessageLabel(QBoxLayout* layout)
 {
 	QLabel* label = new QLabel();
-	label->setObjectName("message");
+	label->setObjectName(QStringLiteral("message"));
 	label->setAlignment(Qt::AlignRight);
 	label->setWordWrap(true);
 	layout->addWidget(label);
@@ -41,14 +41,14 @@ QWidget* QtIndexingDialog::createErrorWidget(QBoxLayout* layout)
 	errorLayout->setSpacing(5);
 
 	QPushButton* errorCount = new QPushButton();
-	errorCount->setObjectName("errorCount");
+	errorCount->setObjectName(QStringLiteral("errorCount"));
 	errorCount->setAttribute(Qt::WA_LayoutUsesWidgetRect);	  // fixes layouting on Mac
 
 	errorCount->setIcon(QPixmap(QString::fromStdWString(
 		ResourcePaths::getGuiPath().concatenate(L"indexing_dialog/error.png").wstr())));
 	errorLayout->addWidget(errorCount);
 
-	QtHelpButton* helpButton = new QtHelpButton("aaa", "bbb");
+	QtHelpButton* helpButton = new QtHelpButton(QStringLiteral("aaa"), QStringLiteral("bbb"));
 	helpButton->setColor(Qt::white);
 
 	helpButton->disconnect();
@@ -82,10 +82,10 @@ QtIndexingDialog::QtIndexingDialog(bool isSubWindow, QWidget* parent)
 {
 	m_window->setStyleSheet(
 		m_window->styleSheet() +
-		"#window { "
+		QStringLiteral("#window { "
 		"background: #2E3C86;"
 		"border: none;"
-		"}");
+		"}"));
 
 	setStyleSheet(
 		(utility::getStyleSheet(ResourcePaths::getGuiPath().concatenate(L"window/window.css")) +

src/lib_gui/qt/window/QtIndexingDialog.h

@@ -19,7 +19,7 @@ class QtIndexingDialog: public QtWindowBase
 
 protected:
 	static QBoxLayout* createLayout(QWidget* parent);
-	static QLabel* createTitleLabel(QString title, QBoxLayout* layout);
+	static QLabel* createTitleLabel(const QString &title, QBoxLayout* layout);
 	static QLabel* createMessageLabel(QBoxLayout* layout);
 	static QWidget* createErrorWidget(QBoxLayout* layout);
 	static QLabel* createFlagLabel(QWidget* parent);

src/lib_gui/qt/window/QtIndexingProgressDialog.cpp

@@ -10,10 +10,10 @@ QtIndexingProgressDialog::QtIndexingProgressDialog(bool hideable, QWidget* paren
 {
 	setSizeGripStyle(false);
 
-	updateTitle("Indexing Files");
+	updateTitle(QStringLiteral("Indexing Files"));
 
 	m_filePathLabel = new QLabel();
-	m_filePathLabel->setObjectName("filePath");
+	m_filePathLabel->setObjectName(QStringLiteral("filePath"));
 	m_filePathLabel->setAlignment(Qt::AlignRight);
 	m_layout->addWidget(m_filePathLabel);
 
@@ -25,15 +25,15 @@ QtIndexingProgressDialog::QtIndexingProgressDialog(bool hideable, QWidget* paren
 	{
 		QHBoxLayout* buttons = new QHBoxLayout();
 
-		QPushButton* stopButton = new QPushButton("Stop");
-		stopButton->setObjectName("windowButton");
+		QPushButton* stopButton = new QPushButton(QStringLiteral("Stop"));
+		stopButton->setObjectName(QStringLiteral("windowButton"));
 		connect(stopButton, &QPushButton::clicked, this, &QtIndexingProgressDialog::onStopPressed);
 		buttons->addWidget(stopButton);
 
 		buttons->addStretch();
 
-		QPushButton* hideButton = new QPushButton("Hide");
-		hideButton->setObjectName("windowButton");
+		QPushButton* hideButton = new QPushButton(QStringLiteral("Hide"));
+		hideButton->setObjectName(QStringLiteral("windowButton"));
 		hideButton->setDefault(true);
 		connect(hideButton, &QPushButton::clicked, this, &QtIndexingProgressDialog::onHidePressed);
 		buttons->addWidget(hideButton);
@@ -78,7 +78,7 @@ void QtIndexingProgressDialog::updateErrorCount(size_t errorCount, size_t fatalC
 		QString str = QString::number(errorCount) + " Error";
 		if (errorCount > 1)
 		{
-			str += "s";
+			str += QLatin1String("s");
 		}
 
 		if (fatalCount)
@@ -86,7 +86,7 @@ void QtIndexingProgressDialog::updateErrorCount(size_t errorCount, size_t fatalC
 			str += " (" + QString::number(fatalCount) + " Fatal)";
 		}
 
-		QPushButton* errorCount = m_errorWidget->findChild<QPushButton*>("errorCount");
+		QPushButton* errorCount = m_errorWidget->findChild<QPushButton*>(QStringLiteral("errorCount"));
 		errorCount->setText(str);
 
 		m_errorWidget->show();

src/lib_gui/qt/window/QtIndexingReportDialog.cpp

@@ -23,30 +23,30 @@ QtIndexingReportDialog::QtIndexingReportDialog(
 
 	if (interrupted)
 	{
-		QtIndexingDialog::createTitleLabel("Interrupted Indexing", m_layout);
+		QtIndexingDialog::createTitleLabel(QStringLiteral("Interrupted Indexing"), m_layout);
 	}
 	else if (shallow)
 	{
-		QtIndexingDialog::createTitleLabel("Finished Shallow Indexing", m_layout);
+		QtIndexingDialog::createTitleLabel(QStringLiteral("Finished Shallow Indexing"), m_layout);
 	}
 	else
 	{
-		QtIndexingDialog::createTitleLabel("Finished Indexing", m_layout);
+		QtIndexingDialog::createTitleLabel(QStringLiteral("Finished Indexing"), m_layout);
 	}
 
 	m_layout->addSpacing(5);
 
 	QtIndexingDialog::createMessageLabel(m_layout)->setText(
-		"Source files indexed:   " + QString::number(indexedFileCount) + "/" +
+		QStringLiteral("Source files indexed:   ") + QString::number(indexedFileCount) + "/" +
 		QString::number(totalIndexedFileCount));
 
 	QtIndexingDialog::createMessageLabel(m_layout)->setText(
-		"Total files completed:   " + QString::number(completedFileCount) + "/" +
+		QStringLiteral("Total files completed:   ") + QString::number(completedFileCount) + "/" +
 		QString::number(totalFileCount));
 
 	m_layout->addSpacing(12);
 	QtIndexingDialog::createMessageLabel(m_layout)->setText(
-		"Time:   " + QString::fromStdString(TimeStamp::secondsToString(time)));
+		QStringLiteral("Time:   ") + QString::fromStdString(TimeStamp::secondsToString(time)));
 
 	m_layout->addSpacing(12);
 	m_errorWidget = QtIndexingDialog::createErrorWidget(m_layout);
@@ -55,9 +55,9 @@ QtIndexingReportDialog::QtIndexingReportDialog(
 
 	if (shallow)
 	{
-		createMessageLabel(m_layout)->setText(
+		createMessageLabel(m_layout)->setText(QStringLiteral(
 			"<i>You can now browse your project while running a second pass for in-depth "
-			"indexing!</i>");
+			"indexing!</i>"));
 		m_layout->addSpacing(12);
 	}
 
@@ -65,16 +65,16 @@ QtIndexingReportDialog::QtIndexingReportDialog(
 		QHBoxLayout* buttons = new QHBoxLayout();
 		if (interrupted)
 		{
-			QPushButton* discardButton = new QPushButton("Discard");
-			discardButton->setObjectName("windowButton");
+			QPushButton* discardButton = new QPushButton(QStringLiteral("Discard"));
+			discardButton->setObjectName(QStringLiteral("windowButton"));
 			connect(
 				discardButton, &QPushButton::clicked, this, &QtIndexingReportDialog::onDiscardPressed);
 			buttons->addWidget(discardButton);
 		}
 		else if (shallow)
 		{
-			QPushButton* startInDepthButton = new QPushButton("Start In-Depth Indexing");
-			startInDepthButton->setObjectName("windowButton");
+			QPushButton* startInDepthButton = new QPushButton(QStringLiteral("Start In-Depth Indexing"));
+			startInDepthButton->setObjectName(QStringLiteral("windowButton"));
 			connect(
 				startInDepthButton,
 				&QPushButton::clicked,
@@ -86,8 +86,9 @@ QtIndexingReportDialog::QtIndexingReportDialog(
 		buttons->addStretch();
 
 		QPushButton* confirmButton = new QPushButton(
-			interrupted ? "Keep" : (shallow ? "Later" : "OK"));
-		confirmButton->setObjectName("windowButton");
+			interrupted ? QStringLiteral("Keep") :
+						  (shallow ? QStringLiteral("Later") : QStringLiteral("OK")));
+		confirmButton->setObjectName(QStringLiteral("windowButton"));
 		confirmButton->setDefault(true);
 		connect(
 			confirmButton, &QPushButton::clicked, this, &QtIndexingReportDialog::onConfirmPressed);
@@ -113,18 +114,18 @@ void QtIndexingReportDialog::updateErrorCount(size_t errorCount, size_t fatalCou
 {
 	if (m_errorWidget && errorCount)
 	{
-		QString str = QString::number(errorCount) + " Error";
+		QString str = QString::number(errorCount) + QStringLiteral(" Error");
 		if (errorCount > 1)
 		{
-			str += "s";
+			str += QStringLiteral("s");
 		}
 
 		if (fatalCount)
 		{
-			str += " (" + QString::number(fatalCount) + " Fatal)";
+			str += QStringLiteral(" (") + QString::number(fatalCount) + QStringLiteral(" Fatal)");
 		}
 
-		QPushButton* errorCount = m_errorWidget->findChild<QPushButton*>("errorCount");
+		QPushButton* errorCount = m_errorWidget->findChild<QPushButton*>(QStringLiteral("errorCount"));
 		errorCount->setText(str);
 
 		m_errorWidget->show();

src/lib_gui/qt/window/QtIndexingStartDialog.cpp

@@ -17,7 +17,7 @@ QtIndexingStartDialog::QtIndexingStartDialog(
 {
 	setSizeGripStyle(false);
 
-	QtIndexingDialog::createTitleLabel("Start Indexing", m_layout);
+	QtIndexingDialog::createTitleLabel(QStringLiteral("Start Indexing"), m_layout);
 	m_layout->addSpacing(5);
 
 	m_clearLabel = QtIndexingDialog::createMessageLabel(m_layout);
@@ -38,11 +38,11 @@ QtIndexingStartDialog::QtIndexingStartDialog(
 	modeTitleLayout->setSpacing(7);
 
 	QLabel* modeLabel = QtIndexingDialog::createMessageLabel(modeTitleLayout);
-	modeLabel->setText("Mode:");
+	modeLabel->setText(QStringLiteral("Mode:"));
 	modeLabel->setAlignment(Qt::AlignLeft);
 
 	QtHelpButton* helpButton = new QtHelpButton(
-		"Indexing Modes",
+		QStringLiteral("Indexing Modes"),
 		QString("<b>Updated files:</b> Reindexes all files that were modified since the last "
 				"indexing, all new files and all files depending "
 				"on those.<br /><br />"
@@ -67,10 +67,10 @@ QtIndexingStartDialog::QtIndexingStartDialog(
 	modeLayout->addLayout(modeTitleLayout);
 	modeLayout->addSpacing(5);
 
-	m_refreshModeButtons.emplace(REFRESH_UPDATED_FILES, new QRadioButton("Updated files"));
+	m_refreshModeButtons.emplace(REFRESH_UPDATED_FILES, new QRadioButton(QStringLiteral("Updated files")));
 	m_refreshModeButtons.emplace(
-		REFRESH_UPDATED_AND_INCOMPLETE_FILES, new QRadioButton("Incomplete && updated files"));
-	m_refreshModeButtons.emplace(REFRESH_ALL_FILES, new QRadioButton("All files"));
+		REFRESH_UPDATED_AND_INCOMPLETE_FILES, new QRadioButton(QStringLiteral("Incomplete && updated files")));
+	m_refreshModeButtons.emplace(REFRESH_ALL_FILES, new QRadioButton(QStringLiteral("All files")));
 
 	std::function<void(bool)> func = [=](bool checked) {
 		if (!checked)
@@ -91,7 +91,7 @@ QtIndexingStartDialog::QtIndexingStartDialog(
 	for (auto p: m_refreshModeButtons)
 	{
 		QRadioButton* button = p.second;
-		button->setObjectName("option");
+		button->setObjectName(QStringLiteral("option"));
 		button->setEnabled(false);
 		if (p.first == initialMode)
 		{
@@ -108,7 +108,7 @@ QtIndexingStartDialog::QtIndexingStartDialog(
 
 	if (enabledShallowOption)
 	{
-		QCheckBox* shallowIndexingCheckBox = new QCheckBox("Shallow Python Indexing");
+		QCheckBox* shallowIndexingCheckBox = new QCheckBox(QStringLiteral("Shallow Python Indexing"));
 		connect(shallowIndexingCheckBox, &QCheckBox::toggled, [=]() {
 			emit setShallowIndexing(shallowIndexingCheckBox->isChecked());
 		});
@@ -123,15 +123,15 @@ QtIndexingStartDialog::QtIndexingStartDialog(
 
 	{
 		QHBoxLayout* buttons = new QHBoxLayout();
-		QPushButton* cancelButton = new QPushButton("Cancel");
-		cancelButton->setObjectName("windowButton");
+		QPushButton* cancelButton = new QPushButton(QStringLiteral("Cancel"));
+		cancelButton->setObjectName(QStringLiteral("windowButton"));
 		connect(cancelButton, &QPushButton::clicked, this, &QtIndexingStartDialog::onCancelPressed);
 		buttons->addWidget(cancelButton);
 
 		buttons->addStretch();
 
-		QPushButton* startButton = new QPushButton("Start");
-		startButton->setObjectName("windowButton");
+		QPushButton* startButton = new QPushButton(QStringLiteral("Start"));
+		startButton->setObjectName(QStringLiteral("windowButton"));
 		startButton->setDefault(true);
 		connect(startButton, &QPushButton::clicked, this, &QtIndexingStartDialog::onStartPressed);
 		buttons->addWidget(startButton);

src/lib_gui/qt/window/QtKeyboardShortcuts.cpp

@@ -38,8 +38,8 @@ void QtKeyboardShortcuts::populateWindow(QWidget* widget)
 	QVBoxLayout* layout = new QVBoxLayout(widget);
 
 	QLabel* generelLabel = new QLabel(this);
-	generelLabel->setObjectName("general_label");
-	generelLabel->setText("General Shortcuts");
+	generelLabel->setObjectName(QStringLiteral("general_label"));
+	generelLabel->setText(QStringLiteral("General Shortcuts"));
 	layout->addWidget(generelLabel);
 
 	layout->addWidget(createGenerelShortcutsTable());
@@ -47,8 +47,8 @@ void QtKeyboardShortcuts::populateWindow(QWidget* widget)
 	layout->addSpacing(20);
 
 	QLabel* codeLabel = new QLabel(this);
-	codeLabel->setObjectName("code_label");
-	codeLabel->setText("Code View Shortcuts");
+	codeLabel->setObjectName(QStringLiteral("code_label"));
+	codeLabel->setText(QStringLiteral("Code View Shortcuts"));
 	layout->addWidget(codeLabel);
 
 	layout->addWidget(createCodeViewShortcutsTable());
@@ -56,8 +56,8 @@ void QtKeyboardShortcuts::populateWindow(QWidget* widget)
 	layout->addSpacing(20);
 
 	QLabel* graphLabel = new QLabel(this);
-	graphLabel->setObjectName("graph_label");
-	graphLabel->setText("Graph View Shortcuts");
+	graphLabel->setObjectName(QStringLiteral("graph_label"));
+	graphLabel->setText(QStringLiteral("Graph View Shortcuts"));
 	layout->addWidget(graphLabel);
 
 	layout->addWidget(createGraphViewShortcutsTable());
@@ -71,8 +71,8 @@ void QtKeyboardShortcuts::populateWindow(QWidget* widget)
 
 void QtKeyboardShortcuts::windowReady()
 {
-	updateTitle("Keyboard Shortcuts");
-	updateCloseButton("Close");
+	updateTitle(QStringLiteral("Keyboard Shortcuts"));
+	updateCloseButton(QStringLiteral("Close"));
 
 	setNextVisible(false);
 	setPreviousVisible(false);
@@ -98,8 +98,8 @@ QtShortcutTable* QtKeyboardShortcuts::createTableWidget(const std::string& objec
 	table->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 
 	table->setColumnCount(2);
-	table->setHorizontalHeaderItem(0, new QTableWidgetItem("Command"));
-	table->setHorizontalHeaderItem(1, new QTableWidgetItem("Shortcut"));
+	table->setHorizontalHeaderItem(0, new QTableWidgetItem(QStringLiteral("Command")));
+	table->setHorizontalHeaderItem(1, new QTableWidgetItem(QStringLiteral("Shortcut")));
 
 	return table;
 }
@@ -110,24 +110,24 @@ QTableWidget* QtKeyboardShortcuts::createGenerelShortcutsTable()
 
 	table->setRowCount(17);
 
-	table->setItem(0, 0, new QTableWidgetItem("Larger Font"));
-	table->setItem(1, 0, new QTableWidgetItem("Smaller Font"));
-	table->setItem(2, 0, new QTableWidgetItem("Reset Font Size"));
-	table->setItem(3, 0, new QTableWidgetItem("Back"));
-	table->setItem(4, 0, new QTableWidgetItem("Forward"));
-	table->setItem(5, 0, new QTableWidgetItem("Refresh"));
-	table->setItem(6, 0, new QTableWidgetItem("Full Refresh"));
-	table->setItem(7, 0, new QTableWidgetItem("Find Symbol"));
-	table->setItem(8, 0, new QTableWidgetItem("Find Text"));
-	table->setItem(9, 0, new QTableWidgetItem("Find On-Screen"));
-	table->setItem(10, 0, new QTableWidgetItem("New Project"));
-	table->setItem(11, 0, new QTableWidgetItem("Open Project"));
-	table->setItem(12, 0, new QTableWidgetItem("Close Window"));
-	table->setItem(13, 0, new QTableWidgetItem("Hide Window"));
-	table->setItem(14, 0, new QTableWidgetItem("To Overview"));
-	table->setItem(15, 0, new QTableWidgetItem("Preferences"));
-	table->setItem(16, 0, new QTableWidgetItem("Bookmark Active Symbol"));
-	table->setItem(17, 0, new QTableWidgetItem("Bookmark Manager"));
+	table->setItem(0, 0, new QTableWidgetItem(QStringLiteral("Larger Font")));
+	table->setItem(1, 0, new QTableWidgetItem(QStringLiteral("Smaller Font")));
+	table->setItem(2, 0, new QTableWidgetItem(QStringLiteral("Reset Font Size")));
+	table->setItem(3, 0, new QTableWidgetItem(QStringLiteral("Back")));
+	table->setItem(4, 0, new QTableWidgetItem(QStringLiteral("Forward")));
+	table->setItem(5, 0, new QTableWidgetItem(QStringLiteral("Refresh")));
+	table->setItem(6, 0, new QTableWidgetItem(QStringLiteral("Full Refresh")));
+	table->setItem(7, 0, new QTableWidgetItem(QStringLiteral("Find Symbol")));
+	table->setItem(8, 0, new QTableWidgetItem(QStringLiteral("Find Text")));
+	table->setItem(9, 0, new QTableWidgetItem(QStringLiteral("Find On-Screen")));
+	table->setItem(10, 0, new QTableWidgetItem(QStringLiteral("New Project")));
+	table->setItem(11, 0, new QTableWidgetItem(QStringLiteral("Open Project")));
+	table->setItem(12, 0, new QTableWidgetItem(QStringLiteral("Close Window")));
+	table->setItem(13, 0, new QTableWidgetItem(QStringLiteral("Hide Window")));
+	table->setItem(14, 0, new QTableWidgetItem(QStringLiteral("To Overview")));
+	table->setItem(15, 0, new QTableWidgetItem(QStringLiteral("Preferences")));
+	table->setItem(16, 0, new QTableWidgetItem(QStringLiteral("Bookmark Active Symbol")));
+	table->setItem(17, 0, new QTableWidgetItem(QStringLiteral("Bookmark Manager")));
 
 #if defined(Q_OS_MAC)
 	table->setItem(0, 1, new QTableWidgetItem("Cmd + +"));
@@ -149,28 +149,28 @@ QTableWidget* QtKeyboardShortcuts::createGenerelShortcutsTable()
 	table->setItem(16, 1, new QTableWidgetItem("Cmd + S"));
 	table->setItem(17, 1, new QTableWidgetItem("Cmd + B"));
 #else
-	table->setItem(0, 1, new QTableWidgetItem("Ctrl + +"));
-	table->setItem(1, 1, new QTableWidgetItem("Ctrl + -"));
-	table->setItem(2, 1, new QTableWidgetItem("Ctrl + 0"));
-	table->setItem(3, 1, new QTableWidgetItem("Ctrl + Z | Backspace"));
-	table->setItem(4, 1, new QTableWidgetItem("Ctrl + Shift + Z"));
-	table->setItem(5, 1, new QTableWidgetItem("F5"));
-	table->setItem(6, 1, new QTableWidgetItem("Shift + F5"));
-	table->setItem(7, 1, new QTableWidgetItem("Ctrl + F"));
-	table->setItem(8, 1, new QTableWidgetItem("Ctrl + Shift + F"));
-	table->setItem(9, 1, new QTableWidgetItem("Ctrl + D | /"));
-	table->setItem(10, 1, new QTableWidgetItem("Ctrl + N"));
-	table->setItem(11, 1, new QTableWidgetItem("Ctrl + O"));
+	table->setItem(0, 1, new QTableWidgetItem(QStringLiteral("Ctrl + +")));
+	table->setItem(1, 1, new QTableWidgetItem(QStringLiteral("Ctrl + -")));
+	table->setItem(2, 1, new QTableWidgetItem(QStringLiteral("Ctrl + 0")));
+	table->setItem(3, 1, new QTableWidgetItem(QStringLiteral("Ctrl + Z | Backspace")));
+	table->setItem(4, 1, new QTableWidgetItem(QStringLiteral("Ctrl + Shift + Z")));
+	table->setItem(5, 1, new QTableWidgetItem(QStringLiteral("F5")));
+	table->setItem(6, 1, new QTableWidgetItem(QStringLiteral("Shift + F5")));
+	table->setItem(7, 1, new QTableWidgetItem(QStringLiteral("Ctrl + F")));
+	table->setItem(8, 1, new QTableWidgetItem(QStringLiteral("Ctrl + Shift + F")));
+	table->setItem(9, 1, new QTableWidgetItem(QStringLiteral("Ctrl + D | /")));
+	table->setItem(10, 1, new QTableWidgetItem(QStringLiteral("Ctrl + N")));
+	table->setItem(11, 1, new QTableWidgetItem(QStringLiteral("Ctrl + O")));
 #	if defined(Q_OS_WIN32)
 	table->setItem(12, 1, new QTableWidgetItem("Alt + F4"));
 #	else
-	table->setItem(12, 1, new QTableWidgetItem("Ctrl + W"));
+	table->setItem(12, 1, new QTableWidgetItem(QStringLiteral("Ctrl + W")));
 #	endif
-	table->setItem(13, 1, new QTableWidgetItem(""));
-	table->setItem(14, 1, new QTableWidgetItem("Ctrl + Home"));
-	table->setItem(15, 1, new QTableWidgetItem("Ctrl + ,"));
-	table->setItem(16, 1, new QTableWidgetItem("Ctrl + S"));
-	table->setItem(17, 1, new QTableWidgetItem("Ctrl + B"));
+	table->setItem(13, 1, new QTableWidgetItem(QLatin1String("")));
+	table->setItem(14, 1, new QTableWidgetItem(QStringLiteral("Ctrl + Home")));
+	table->setItem(15, 1, new QTableWidgetItem(QStringLiteral("Ctrl + ,")));
+	table->setItem(16, 1, new QTableWidgetItem(QStringLiteral("Ctrl + S")));
+	table->setItem(17, 1, new QTableWidgetItem(QStringLiteral("Ctrl + B")));
 #endif
 
 	table->updateSize();
@@ -183,10 +183,10 @@ QTableWidget* QtKeyboardShortcuts::createCodeViewShortcutsTable()
 	QtShortcutTable* table = createTableWidget("table_code");
 
 	table->setRowCount(4);
-	table->setItem(0, 0, new QTableWidgetItem("Next Reference"));
-	table->setItem(1, 0, new QTableWidgetItem("Previous Reference"));
-	table->setItem(2, 0, new QTableWidgetItem("Next Local Reference"));
-	table->setItem(3, 0, new QTableWidgetItem("Previous Local Reference"));
+	table->setItem(0, 0, new QTableWidgetItem(QStringLiteral("Next Reference")));
+	table->setItem(1, 0, new QTableWidgetItem(QStringLiteral("Previous Reference")));
+	table->setItem(2, 0, new QTableWidgetItem(QStringLiteral("Next Local Reference")));
+	table->setItem(3, 0, new QTableWidgetItem(QStringLiteral("Previous Local Reference")));
 
 #if defined(Q_OS_MAC)
 	table->setItem(0, 1, new QTableWidgetItem("Cmd + G"));
@@ -194,10 +194,10 @@ QTableWidget* QtKeyboardShortcuts::createCodeViewShortcutsTable()
 	table->setItem(2, 1, new QTableWidgetItem("Cmd + T"));
 	table->setItem(3, 1, new QTableWidgetItem("Cmd + Shift + T"));
 #else
-	table->setItem(0, 1, new QTableWidgetItem("Ctrl + G"));
-	table->setItem(1, 1, new QTableWidgetItem("Ctrl + Shift + G"));
-	table->setItem(2, 1, new QTableWidgetItem("Ctrl + T"));
-	table->setItem(3, 1, new QTableWidgetItem("Ctrl + Shift + T"));
+	table->setItem(0, 1, new QTableWidgetItem(QStringLiteral("Ctrl + G")));
+	table->setItem(1, 1, new QTableWidgetItem(QStringLiteral("Ctrl + Shift + G")));
+	table->setItem(2, 1, new QTableWidgetItem(QStringLiteral("Ctrl + T")));
+	table->setItem(3, 1, new QTableWidgetItem(QStringLiteral("Ctrl + Shift + T")));
 #endif
 
 	table->updateSize();
@@ -210,26 +210,26 @@ QTableWidget* QtKeyboardShortcuts::createGraphViewShortcutsTable()
 	QtShortcutTable* table = createTableWidget("table_graph");
 
 	table->setRowCount(7);
-	table->setItem(0, 0, new QTableWidgetItem("Pan left"));
-	table->setItem(1, 0, new QTableWidgetItem("Pan right"));
-	table->setItem(2, 0, new QTableWidgetItem("Pan up"));
-	table->setItem(3, 0, new QTableWidgetItem("Pan down"));
-	table->setItem(4, 0, new QTableWidgetItem("Zoom in"));
-	table->setItem(5, 0, new QTableWidgetItem("Zoom out"));
-	table->setItem(6, 0, new QTableWidgetItem("Reset Zoom"));
+	table->setItem(0, 0, new QTableWidgetItem(QStringLiteral("Pan left")));
+	table->setItem(1, 0, new QTableWidgetItem(QStringLiteral("Pan right")));
+	table->setItem(2, 0, new QTableWidgetItem(QStringLiteral("Pan up")));
+	table->setItem(3, 0, new QTableWidgetItem(QStringLiteral("Pan down")));
+	table->setItem(4, 0, new QTableWidgetItem(QStringLiteral("Zoom in")));
+	table->setItem(5, 0, new QTableWidgetItem(QStringLiteral("Zoom out")));
+	table->setItem(6, 0, new QTableWidgetItem(QStringLiteral("Reset Zoom")));
 
-	table->setItem(0, 1, new QTableWidgetItem("A"));
-	table->setItem(1, 1, new QTableWidgetItem("D"));
-	table->setItem(2, 1, new QTableWidgetItem("W"));
-	table->setItem(3, 1, new QTableWidgetItem("S"));
+	table->setItem(0, 1, new QTableWidgetItem(QStringLiteral("A")));
+	table->setItem(1, 1, new QTableWidgetItem(QStringLiteral("D")));
+	table->setItem(2, 1, new QTableWidgetItem(QStringLiteral("W")));
+	table->setItem(3, 1, new QTableWidgetItem(QStringLiteral("S")));
 #if defined(Q_OS_MAC)
 	table->setItem(4, 1, new QTableWidgetItem("Shift + W | Cmd + Mousewheel up"));
 	table->setItem(5, 1, new QTableWidgetItem("Shift + S | Cmd + Mousewheel down"));
 #else
-	table->setItem(4, 1, new QTableWidgetItem("Shift + W | Ctrl + Mousewheel up"));
-	table->setItem(5, 1, new QTableWidgetItem("Shift + S | Ctrl + Mousewheel down"));
+	table->setItem(4, 1, new QTableWidgetItem(QStringLiteral("Shift + W | Ctrl + Mousewheel up")));
+	table->setItem(5, 1, new QTableWidgetItem(QStringLiteral("Shift + S | Ctrl + Mousewheel down")));
 #endif
-	table->setItem(6, 1, new QTableWidgetItem("0"));
+	table->setItem(6, 1, new QTableWidgetItem(QStringLiteral("0")));
 
 	table->updateSize();
 

src/lib_gui/qt/window/QtKnownProgressDialog.cpp

@@ -7,7 +7,7 @@ QtKnownProgressDialog::QtKnownProgressDialog(bool hideable, QWidget* parent)
 {
 	setSizeGripStyle(false);
 
-	updateTitle("Progress");
+	updateTitle(QStringLiteral("Progress"));
 
 	m_layout->addStretch();
 
@@ -16,8 +16,8 @@ QtKnownProgressDialog::QtKnownProgressDialog(bool hideable, QWidget* parent)
 		QHBoxLayout* buttons = new QHBoxLayout();
 		buttons->addStretch();
 
-		QPushButton* hideButton = new QPushButton("Hide");
-		hideButton->setObjectName("windowButton");
+		QPushButton* hideButton = new QPushButton(QStringLiteral("Hide"));
+		hideButton->setObjectName(QStringLiteral("windowButton"));
 		hideButton->setDefault(true);
 		connect(hideButton, &QPushButton::clicked, this, &QtKnownProgressDialog::onHidePressed);
 		buttons->addWidget(hideButton);

src/lib_gui/qt/window/QtLicenseWindow.cpp

@@ -46,11 +46,11 @@ void QtLicenseWindow::populateWindow(QWidget* widget)
 
 	layout->addSpacing(30);
 
-	QLabel* header3rdParties = new QLabel(
+	QLabel* header3rdParties = new QLabel(QStringLiteral(
 		"<b>Copyrights and Licenses for Third Party Software Distributed with Sourcetrail:</b><br "
 		"/>"
 		"Sourcetaril contains code written by the following third parties that have <br />"
-		"additional or alternate copyrights, licenses, and/or restrictions:");
+		"additional or alternate copyrights, licenses, and/or restrictions:"));
 	layout->addWidget(header3rdParties);
 
 	layout->addSpacing(30);
@@ -87,8 +87,8 @@ void QtLicenseWindow::populateWindow(QWidget* widget)
 
 void QtLicenseWindow::windowReady()
 {
-	updateTitle("License");
-	updateCloseButton("Close");
+	updateTitle(QStringLiteral("License"));
+	updateCloseButton(QStringLiteral("Close"));
 
 	setNextVisible(false);
 	setPreviousVisible(false);

src/lib_gui/qt/window/QtMainWindow.cpp

@@ -115,7 +115,7 @@ QtMainWindow::QtMainWindow()
 	, m_showDockWidgetTitleBars(true)
 	, m_windowStack(this)
 {
-	setObjectName("QtMainWindow");
+	setObjectName(QStringLiteral("QtMainWindow"));
 	setCentralWidget(nullptr);
 	setDockNestingEnabled(true);
 
@@ -167,13 +167,13 @@ QtMainWindow::~QtMainWindow()
 void QtMainWindow::addView(View* view)
 {
 	const QString name = QString::fromStdString(view->getName());
-	if (name == "Tabs")
+	if (name == QLatin1String("Tabs"))
 	{
 		QToolBar* toolBar = new QToolBar();
 		toolBar->setObjectName("Tool" + name);
 		toolBar->setMovable(false);
 		toolBar->setFloatable(false);
-		toolBar->setStyleSheet("* { margin: 0; }");
+		toolBar->setStyleSheet(QStringLiteral("* { margin: 0; }"));
 		toolBar->addWidget(QtViewWidgetWrapper::getWidgetOfView(view));
 		addToolBar(toolBar);
 		return;
@@ -189,7 +189,7 @@ void QtMainWindow::addView(View* view)
 	layout->addWidget(QtViewWidgetWrapper::getWidgetOfView(view));
 
 	// Disable un-intended vertical growth of search widget
-	if (name == "Search")
+	if (name == QLatin1String("Search"))
 	{
 		dock->setSizePolicy(dock->sizePolicy().horizontalPolicy(), QSizePolicy::Fixed);
 	}
@@ -222,7 +222,7 @@ void QtMainWindow::addView(View* view)
 void QtMainWindow::overrideView(View* view)
 {
 	const QString name = QString::fromStdString(view->getName());
-	if (name == "Tabs")
+	if (name == QLatin1String("Tabs"))
 	{
 		return;
 	}
@@ -299,14 +299,14 @@ void QtMainWindow::loadLayout()
 	QSettings settings(
 		QString::fromStdWString(UserPaths::getWindowSettingsPath().wstr()), QSettings::IniFormat);
 
-	settings.beginGroup("MainWindow");
-	resize(settings.value("size", QSize(600, 400)).toSize());
-	move(settings.value("position", QPoint(200, 200)).toPoint());
-	if (settings.value("maximized", false).toBool())
+	settings.beginGroup(QStringLiteral("MainWindow"));
+	resize(settings.value(QStringLiteral("size"), QSize(600, 400)).toSize());
+	move(settings.value(QStringLiteral("position"), QPoint(200, 200)).toPoint());
+	if (settings.value(QStringLiteral("maximized"), false).toBool())
 	{
 		showMaximized();
 	}
-	setShowDockWidgetTitleBars(settings.value("showTitleBars", true).toBool());
+	setShowDockWidgetTitleBars(settings.value(QStringLiteral("showTitleBars"), true).toBool());
 	settings.endGroup();
 	loadDockWidgetLayout();
 }
@@ -315,7 +315,7 @@ void QtMainWindow::loadDockWidgetLayout()
 {
 	QSettings settings(
 		QString::fromStdWString(UserPaths::getWindowSettingsPath().wstr()), QSettings::IniFormat);
-	this->restoreState(settings.value("DOCK_LOCATIONS").toByteArray());
+	this->restoreState(settings.value(QStringLiteral("DOCK_LOCATIONS")).toByteArray());
 
 	for (DockWidget dock: m_dockWidgets)
 	{
@@ -336,17 +336,17 @@ void QtMainWindow::saveLayout()
 	QSettings settings(
 		QString::fromStdWString(UserPaths::getWindowSettingsPath().wstr()), QSettings::IniFormat);
 
-	settings.beginGroup("MainWindow");
-	settings.setValue("maximized", isMaximized());
+	settings.beginGroup(QStringLiteral("MainWindow"));
+	settings.setValue(QStringLiteral("maximized"), isMaximized());
 	if (!isMaximized())
 	{
-		settings.setValue("size", size());
-		settings.setValue("position", pos());
+		settings.setValue(QStringLiteral("size"), size());
+		settings.setValue(QStringLiteral("position"), pos());
 	}
-	settings.setValue("showTitleBars", m_showDockWidgetTitleBars);
+	settings.setValue(QStringLiteral("showTitleBars"), m_showDockWidgetTitleBars);
 	settings.endGroup();
 
-	settings.setValue("DOCK_LOCATIONS", this->saveState());
+	settings.setValue(QStringLiteral("DOCK_LOCATIONS"), this->saveState());
 }
 
 void QtMainWindow::updateHistoryMenu(std::shared_ptr<MessageBase> message)
@@ -504,7 +504,7 @@ void QtMainWindow::openSettings()
 
 void QtMainWindow::showDocumentation()
 {
-	QDesktopServices::openUrl(QUrl("https://sourcetrail.com/documentation/"));
+	QDesktopServices::openUrl(QUrl(QStringLiteral("https://sourcetrail.com/documentation/")));
 }
 
 void QtMainWindow::showKeyboardShortcuts()
@@ -521,12 +521,12 @@ void QtMainWindow::showErrorHelpMessage()
 void QtMainWindow::showChangelog()
 {
 	QDesktopServices::openUrl(
-		QUrl("https://github.com/CoatiSoftware/Sourcetrail/blob/master/CHANGELOG.md"));
+		QUrl(QStringLiteral("https://github.com/CoatiSoftware/Sourcetrail/blob/master/CHANGELOG.md")));
 }
 
 void QtMainWindow::showBugtracker()
 {
-	QDesktopServices::openUrl(QUrl("https://github.com/CoatiSoftware/Sourcetrail/issues"));
+	QDesktopServices::openUrl(QUrl(QStringLiteral("https://github.com/CoatiSoftware/Sourcetrail/issues")));
 }
 
 void QtMainWindow::showLicenses()
@@ -608,7 +608,7 @@ void QtMainWindow::newProjectFromCDB(const FilePath& filePath)
 void QtMainWindow::openProject()
 {
 	QString fileName = QtFileDialog::getOpenFileName(
-		this, tr("Open File"), FilePath(), "Sourcetrail Project Files (*.srctrlprj)");
+		this, tr("Open File"), FilePath(), QStringLiteral("Sourcetrail Project Files (*.srctrlprj)"));
 
 	if (!fileName.isEmpty())
 	{
@@ -963,7 +963,7 @@ void QtMainWindow::setupViewMenu()
 
 	menu->addAction(tr("Show Start Window"), this, &QtMainWindow::showStartScreen);
 
-	m_showTitleBarsAction = new QAction("Show Title Bars", this);
+	m_showTitleBarsAction = new QAction(QStringLiteral("Show Title Bars"), this);
 	m_showTitleBarsAction->setCheckable(true);
 	m_showTitleBarsAction->setChecked(m_showDockWidgetTitleBars);
 	connect(

src/lib_gui/qt/window/QtPathListDialog.cpp

@@ -40,7 +40,7 @@ void QtPathListDialog::populateWindow(QWidget* widget)
 	layout->setContentsMargins(0, 0, 0, 0);
 
 	QLabel* description = new QLabel(m_description);
-	description->setObjectName("description");
+	description->setObjectName(QStringLiteral("description"));
 	description->setWordWrap(true);
 	layout->addWidget(description);
 
@@ -55,8 +55,8 @@ void QtPathListDialog::populateWindow(QWidget* widget)
 
 void QtPathListDialog::windowReady()
 {
-	updateNextButton("Save");
-	updateCloseButton("Cancel");
+	updateNextButton(QStringLiteral("Save"));
+	updateCloseButton(QStringLiteral("Cancel"));
 
 	setPreviousVisible(false);
 

src/lib_gui/qt/window/QtPreferencesWindow.cpp

@@ -52,8 +52,8 @@ void QtPreferencesWindow::windowReady()
 {
 	QtProjectWizardWindow::windowReady();
 
-	updateTitle("PREFERENCES");
-	updateNextButton("Save");
+	updateTitle(QStringLiteral("PREFERENCES"));
+	updateNextButton(QStringLiteral("Save"));
 	setPreviousVisible(false);
 
 	loadContent();

src/lib_gui/qt/window/QtProgressBarDialog.cpp

@@ -8,7 +8,7 @@ QtProgressBarDialog::QtProgressBarDialog(float topRatio, bool hideable, QWidget*
 	: QtIndexingDialog(true, parent), m_title(nullptr), m_topRatio(topRatio)
 {
 	m_top = new QWidget(m_window);
-	m_top->setObjectName("topHalf");
+	m_top->setObjectName(QStringLiteral("topHalf"));
 	m_top->setGeometry(0, 0, 0, 0);
 	m_top->show();
 	m_top->lower();
@@ -16,13 +16,13 @@ QtProgressBarDialog::QtProgressBarDialog(float topRatio, bool hideable, QWidget*
 	m_progressBar = new QtProgressBar(m_window);
 	m_progressBar->setGeometry(0, 0, 0, 0);
 
-	m_title = new QLabel("", this);
-	m_title->setObjectName("title");
+	m_title = new QLabel(QLatin1String(""), this);
+	m_title->setObjectName(QStringLiteral("title"));
 	m_title->setAlignment(Qt::AlignRight | Qt::AlignBottom);
 	m_title->show();
 
-	m_percentLabel = new QLabel("0% Progress");
-	m_percentLabel->setObjectName("percent");
+	m_percentLabel = new QLabel(QStringLiteral("0% Progress"));
+	m_percentLabel->setObjectName(QStringLiteral("percent"));
 	m_layout->addWidget(m_percentLabel, 0, Qt::AlignRight);
 
 	m_messageLabel = QtIndexingDialog::createMessageLabel(m_layout);

src/lib_gui/qt/window/QtSelectPathsDialog.cpp

@@ -58,7 +58,7 @@ void QtSelectPathsDialog::setPathsList(
 		if (!s.exists())
 		{
 			item->setTextColor(Qt::red);
-			item->setToolTip("Path does not exist");
+			item->setToolTip(QStringLiteral("Path does not exist"));
 			item->setFlags(item->flags() & ~Qt::ItemIsEnabled);
 			item->setCheckState(Qt::Unchecked);
 		}
@@ -83,12 +83,12 @@ void QtSelectPathsDialog::populateWindow(QWidget* widget)
 	layout->setContentsMargins(0, 0, 0, 0);
 
 	QLabel* description = new QLabel(m_description);
-	description->setObjectName("description");
+	description->setObjectName(QStringLiteral("description"));
 	description->setWordWrap(true);
 	layout->addWidget(description);
 
 	m_list = new QListWidget();
-	m_list->setObjectName("pathList");
+	m_list->setObjectName(QStringLiteral("pathList"));
 	m_list->setEditTriggers(QAbstractItemView::NoEditTriggers);
 	m_list->setSelectionMode(QAbstractItemView::ExtendedSelection);
 	m_list->setAttribute(Qt::WA_MacShowFocusRect, 0);
@@ -97,8 +97,8 @@ void QtSelectPathsDialog::populateWindow(QWidget* widget)
 	QHBoxLayout* buttonLayout = new QHBoxLayout();
 	buttonLayout->setContentsMargins(0, 0, 0, 0);
 
-	QPushButton* checkAllButton = new QPushButton("check all");
-	checkAllButton->setObjectName("windowButton");
+	QPushButton* checkAllButton = new QPushButton(QStringLiteral("check all"));
+	checkAllButton->setObjectName(QStringLiteral("windowButton"));
 	connect(checkAllButton, &QPushButton::clicked, [=]() {
 		m_list->selectAll();
 		checkSelected(true);
@@ -106,8 +106,8 @@ void QtSelectPathsDialog::populateWindow(QWidget* widget)
 	});
 	buttonLayout->addWidget(checkAllButton);
 
-	QPushButton* unCheckAllButton = new QPushButton("uncheck all");
-	unCheckAllButton->setObjectName("windowButton");
+	QPushButton* unCheckAllButton = new QPushButton(QStringLiteral("uncheck all"));
+	unCheckAllButton->setObjectName(QStringLiteral("windowButton"));
 	connect(unCheckAllButton, &QPushButton::clicked, [=]() {
 		m_list->selectAll();
 		checkSelected(false);
@@ -115,13 +115,13 @@ void QtSelectPathsDialog::populateWindow(QWidget* widget)
 	});
 	buttonLayout->addWidget(unCheckAllButton);
 
-	QPushButton* checkSelectedButton = new QPushButton("check selected");
-	checkSelectedButton->setObjectName("windowButton");
+	QPushButton* checkSelectedButton = new QPushButton(QStringLiteral("check selected"));
+	checkSelectedButton->setObjectName(QStringLiteral("windowButton"));
 	connect(checkSelectedButton, &QPushButton::clicked, [=]() { checkSelected(true); });
 	buttonLayout->addWidget(checkSelectedButton);
 
-	QPushButton* unCheckSelectedButton = new QPushButton("uncheck selected");
-	unCheckSelectedButton->setObjectName("windowButton");
+	QPushButton* unCheckSelectedButton = new QPushButton(QStringLiteral("uncheck selected"));
+	unCheckSelectedButton->setObjectName(QStringLiteral("windowButton"));
 	connect(unCheckSelectedButton, &QPushButton::clicked, [=]() { checkSelected(false); });
 	buttonLayout->addWidget(unCheckSelectedButton);
 
@@ -132,8 +132,8 @@ void QtSelectPathsDialog::populateWindow(QWidget* widget)
 
 void QtSelectPathsDialog::windowReady()
 {
-	updateNextButton("Save");
-	updateCloseButton("Cancel");
+	updateNextButton(QStringLiteral("Save"));
+	updateCloseButton(QStringLiteral("Cancel"));
 
 	setPreviousVisible(false);
 

src/lib_gui/qt/window/QtStartScreen.cpp

@@ -50,13 +50,13 @@ void QtRecentProjectButton::handleButtonClick()
 	else
 	{
 		QMessageBox msgBox;
-		msgBox.setText("Missing Project File");
+		msgBox.setText(QStringLiteral("Missing Project File"));
 		msgBox.setInformativeText(QString::fromStdWString(
 			L"<p>Couldn't find \"" + m_projectFilePath.wstr() +
 			L"\" on your filesystem.</p><p>Do you want to remove it from recent project "
 			L"list?</p>"));
-		msgBox.addButton("Remove", QMessageBox::ButtonRole::YesRole);
-		msgBox.addButton("Keep", QMessageBox::ButtonRole::NoRole);
+		msgBox.addButton(QStringLiteral("Remove"), QMessageBox::ButtonRole::YesRole);
+		msgBox.addButton(QStringLiteral("Keep"), QMessageBox::ButtonRole::NoRole);
 		msgBox.setIcon(QMessageBox::Icon::Question);
 		int ret = msgBox.exec();
 
@@ -148,7 +148,7 @@ void QtStartScreen::updateButtons()
 				&QtRecentProjectButton::handleButtonClick);
 			if (button->projectExists())
 			{
-				button->setObjectName("recentButton");
+				button->setObjectName(QStringLiteral("recentButton"));
 				connect(
 					button, &QtRecentProjectButton::clicked, this, &QtStartScreen::handleRecentButton);
 			}
@@ -156,7 +156,7 @@ void QtStartScreen::updateButtons()
 			{
 				connect(
 					button, &QtRecentProjectButton::updateButtons, this, &QtStartScreen::updateButtons);
-				button->setObjectName("recentButtonMissing");
+				button->setObjectName(QStringLiteral("recentButtonMissing"));
 			}
 		}
 		else
@@ -188,7 +188,7 @@ void QtStartScreen::setupStartScreen()
 
 		QLabel* versionLabel = new QLabel(
 			("Version " + Version::getApplicationVersion().toDisplayString()).c_str(), this);
-		versionLabel->setObjectName("boldLabel");
+		versionLabel->setObjectName(QStringLiteral("boldLabel"));
 		col->addWidget(versionLabel);
 
 		QtUpdateCheckerWidget* checker = new QtUpdateCheckerWidget(this);
@@ -196,35 +196,35 @@ void QtStartScreen::setupStartScreen()
 
 		col->addSpacing(15);
 
-		QPushButton* githubButton = new QPushButton("Contribute on GitHub", this);
+		QPushButton* githubButton = new QPushButton(QStringLiteral("Contribute on GitHub"), this);
 		githubButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);	// fixes layouting on Mac
-		githubButton->setObjectName("infoButton");
+		githubButton->setObjectName(QStringLiteral("infoButton"));
 		githubButton->setIcon(m_githubIcon);
 		githubButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 		connect(githubButton, &QPushButton::clicked, []() {
 			QDesktopServices::openUrl(
-				QUrl("https://github.com/CoatiSoftware/Sourcetrail", QUrl::TolerantMode));
+				QUrl(QStringLiteral("https://github.com/CoatiSoftware/Sourcetrail"), QUrl::TolerantMode));
 		});
 		col->addWidget(githubButton);
 
 		col->addSpacing(8);
 
 		// QPushButton* patreonButton = new QPushButton("Support on Patreon", this);
-		QPushButton* patreonButton = new QPushButton("Become a Patron", this);
+		QPushButton* patreonButton = new QPushButton(QStringLiteral("Become a Patron"), this);
 		patreonButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);	 // fixes layouting on Mac
-		patreonButton->setObjectName("infoButton");
+		patreonButton->setObjectName(QStringLiteral("infoButton"));
 		patreonButton->setIcon(m_patreonIcon);
 		patreonButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 		connect(patreonButton, &QPushButton::clicked, []() {
-			QDesktopServices::openUrl(QUrl("https://www.patreon.com/sourcetrail", QUrl::TolerantMode));
+			QDesktopServices::openUrl(QUrl(QStringLiteral("https://www.patreon.com/sourcetrail"), QUrl::TolerantMode));
 		});
 		col->addWidget(patreonButton);
 
 		col->addSpacing(15);
 
 		{
-			QLabel* newsHeader = new QLabel("News:");
-			newsHeader->setObjectName("boldLabel");
+			QLabel* newsHeader = new QLabel(QStringLiteral("News:"));
+			newsHeader->setObjectName(QStringLiteral("boldLabel"));
 			col->addWidget(newsHeader);
 
 			QtNewsWidget* newsWidget = new QtNewsWidget(this);
@@ -237,9 +237,9 @@ void QtStartScreen::setupStartScreen()
 		col->addSpacing(35);
 		col->addStretch();
 
-		QPushButton* newProjectButton = new QPushButton("New Project", this);
+		QPushButton* newProjectButton = new QPushButton(QStringLiteral("New Project"), this);
 		newProjectButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);	// fixes layouting on Mac
-		newProjectButton->setObjectName("projectButton");
+		newProjectButton->setObjectName(QStringLiteral("projectButton"));
 		newProjectButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 		connect(
 			newProjectButton, &QPushButton::clicked, this, &QtStartScreen::handleNewProjectButton);
@@ -247,9 +247,9 @@ void QtStartScreen::setupStartScreen()
 
 		col->addSpacing(8);
 
-		QPushButton* openProjectButton = new QPushButton("Open Project", this);
+		QPushButton* openProjectButton = new QPushButton(QStringLiteral("Open Project"), this);
 		openProjectButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);	 // fixes layouting on Mac
-		openProjectButton->setObjectName("projectButton");
+		openProjectButton->setObjectName(QStringLiteral("projectButton"));
 		openProjectButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 		connect(
 			openProjectButton, &QPushButton::clicked, this, &QtStartScreen::handleOpenProjectButton);
@@ -262,8 +262,8 @@ void QtStartScreen::setupStartScreen()
 		QVBoxLayout* col = new QVBoxLayout();
 		layout->addLayout(col, 1);
 
-		QLabel* recentProjectsLabel = new QLabel("Recent Projects: ", this);
-		recentProjectsLabel->setObjectName("titleLabel");
+		QLabel* recentProjectsLabel = new QLabel(QStringLiteral("Recent Projects: "), this);
+		recentProjectsLabel->setObjectName(QStringLiteral("titleLabel"));
 		col->addWidget(recentProjectsLabel);
 
 		col->addSpacing(20);
@@ -275,7 +275,7 @@ void QtStartScreen::setupStartScreen()
 			button->setIcon(m_projectIcon);
 			button->setIconSize(QSize(30, 30));
 			button->setMinimumSize(button->fontMetrics().width(button->text()) + 45, 40);
-			button->setObjectName("recentButtonMissing");
+			button->setObjectName(QStringLiteral("recentButtonMissing"));
 			button->minimumSizeHint();	  // force font loading
 			m_recentProjectsButtons.push_back(button);
 			col->addWidget(button);

src/lib_gui/qt/window/QtTextEditDialog.cpp

@@ -29,11 +29,11 @@ void QtTextEditDialog::setReadOnly(bool readOnly)
 
 	if (readOnly)
 	{
-		updateNextButton("OK");
+		updateNextButton(QStringLiteral("OK"));
 	}
 	else
 	{
-		updateNextButton("Save");
+		updateNextButton(QStringLiteral("Save"));
 	}
 }
 
@@ -43,12 +43,12 @@ void QtTextEditDialog::populateWindow(QWidget* widget)
 	layout->setContentsMargins(0, 0, 0, 0);
 
 	QLabel* description = new QLabel(m_description);
-	description->setObjectName("description");
+	description->setObjectName(QStringLiteral("description"));
 	description->setWordWrap(true);
 	layout->addWidget(description);
 
 	m_text = new QPlainTextEdit();
-	m_text->setObjectName("textField");
+	m_text->setObjectName(QStringLiteral("textField"));
 	m_text->setLineWrapMode(QPlainTextEdit::NoWrap);
 	m_text->setTabStopWidth(8 * m_text->fontMetrics().width('9'));
 	layout->addWidget(m_text);
@@ -58,8 +58,8 @@ void QtTextEditDialog::populateWindow(QWidget* widget)
 
 void QtTextEditDialog::windowReady()
 {
-	updateNextButton("Save");
-	updateCloseButton("Cancel");
+	updateNextButton(QStringLiteral("Save"));
+	updateCloseButton(QStringLiteral("Cancel"));
 
 	setPreviousVisible(false);
 

src/lib_gui/qt/window/QtUnknownProgressDialog.cpp

@@ -7,7 +7,7 @@ QtUnknownProgressDialog::QtUnknownProgressDialog(bool hideable, QWidget* parent)
 {
 	setSizeGripStyle(false);
 
-	updateTitle("Status");
+	updateTitle(QStringLiteral("Status"));
 
 	m_layout->addStretch();
 
@@ -16,8 +16,8 @@ QtUnknownProgressDialog::QtUnknownProgressDialog(bool hideable, QWidget* parent)
 		QHBoxLayout* buttons = new QHBoxLayout();
 		buttons->addStretch();
 
-		QPushButton* hideButton = new QPushButton("Hide");
-		hideButton->setObjectName("windowButton");
+		QPushButton* hideButton = new QPushButton(QStringLiteral("Hide"));
+		hideButton->setObjectName(QStringLiteral("windowButton"));
 		hideButton->setDefault(true);
 		connect(hideButton, &QPushButton::clicked, this, &QtUnknownProgressDialog::onHidePressed);
 		buttons->addWidget(hideButton);

src/lib_gui/qt/window/QtWindow.cpp

@@ -35,13 +35,13 @@ void QtWindow::setup()
 		hlayout->setContentsMargins(0, 0, 0, 0);
 
 		m_title = new QLabel();
-		m_title->setObjectName("title");
+		m_title->setObjectName(QStringLiteral("title"));
 		hlayout->addWidget(m_title);
 
 		hlayout->addStretch();
 
 		m_subTitle = new QLabel();
-		m_subTitle->setObjectName("subTitle");
+		m_subTitle->setObjectName(QStringLiteral("subTitle"));
 		hlayout->addWidget(m_subTitle);
 
 		layout->addLayout(hlayout);
@@ -50,13 +50,13 @@ void QtWindow::setup()
 	layout->addSpacing(10);
 
 	QWidget* contentWidget = new QWidget();
-	contentWidget->setObjectName("form");
+	contentWidget->setObjectName(QStringLiteral("form"));
 
 	populateWindow(contentWidget);
 
 	QScrollArea* scrollArea = new QScrollArea();
 	scrollArea->setFrameShadow(QFrame::Plain);
-	scrollArea->setObjectName("formArea");
+	scrollArea->setObjectName(QStringLiteral("formArea"));
 	scrollArea->setWidgetResizable(true);
 
 	scrollArea->setWidget(contentWidget);
@@ -69,7 +69,7 @@ void QtWindow::setup()
 	}
 	else
 	{
-		scrollArea->setObjectName("scrollArea");
+		scrollArea->setObjectName(QStringLiteral("scrollArea"));
 	}
 
 	QHBoxLayout* buttonLayout = createButtons();
@@ -361,16 +361,16 @@ void QtWindow::addLogo()
 
 QHBoxLayout* QtWindow::createButtons()
 {
-	m_nextButton = new QPushButton("Next");
-	m_nextButton->setObjectName("windowButton");
+	m_nextButton = new QPushButton(QStringLiteral("Next"));
+	m_nextButton->setObjectName(QStringLiteral("windowButton"));
 	connect(m_nextButton, &QPushButton::clicked, this, &QtWindow::handleNextPress);
 
-	m_previousButton = new QPushButton("Previous");
-	m_previousButton->setObjectName("windowButton");
+	m_previousButton = new QPushButton(QStringLiteral("Previous"));
+	m_previousButton->setObjectName(QStringLiteral("windowButton"));
 	connect(m_previousButton, &QPushButton::clicked, this, &QtWindow::handlePreviousPress);
 
-	m_closeButton = new QPushButton("Cancel");
-	m_closeButton->setObjectName("windowButton");
+	m_closeButton = new QPushButton(QStringLiteral("Cancel"));
+	m_closeButton->setObjectName(QStringLiteral("windowButton"));
 	connect(m_closeButton, &QPushButton::clicked, this, &QtWindow::handleClosePress);
 
 	QHBoxLayout* buttons = new QHBoxLayout();

src/lib_gui/qt/window/QtWindowBase.cpp

@@ -28,7 +28,7 @@ QtWindowBase::QtWindowBase(bool isSubWindow, QWidget* parent)
 	}
 
 	m_window = new QWidget(this);
-	m_window->setObjectName("window");
+	m_window->setObjectName(QStringLiteral("window"));
 
 	QVBoxLayout* layout = new QVBoxLayout(m_window);
 	layout->setSpacing(0);

src/lib_gui/utility/utilityApp.cpp

@@ -70,7 +70,8 @@ std::pair<int, std::string> utility::executeProcess(
 	QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 	QStringList envlist = env.toStringList();
 	envlist.replaceInStrings(
-		QRegularExpression("^(?i)PATH=(.*)"), "PATH=/opt/local/bin:/usr/local/bin:$HOME/bin:\\1");
+		QRegularExpression(QStringLiteral("^(?i)PATH=(.*)")),
+		QStringLiteral("PATH=/opt/local/bin:/usr/local/bin:$HOME/bin:\\1"));
 	process.setEnvironment(envlist);
 
 	{
@@ -108,7 +109,8 @@ std::string utility::executeProcessUntilNoOutput(
 	QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 	QStringList envlist = env.toStringList();
 	envlist.replaceInStrings(
-		QRegularExpression("^(?i)PATH=(.*)"), "PATH=/opt/local/bin:/usr/local/bin:$HOME/bin:\\1");
+		QRegularExpression(QStringLiteral("^(?i)PATH=(.*)")),
+		QStringLiteral("PATH=/opt/local/bin:/usr/local/bin:$HOME/bin:\\1"));
 	process.setEnvironment(envlist);
 
 	{
@@ -209,7 +211,8 @@ int utility::executeProcessAndGetExitCode(
 	QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
 	QStringList envlist = env.toStringList();
 	envlist.replaceInStrings(
-		QRegularExpression("^(?i)PATH=(.*)"), "PATH=/opt/local/bin:/usr/local/bin:$HOME/bin:\\1");
+		QRegularExpression(QStringLiteral("^(?i)PATH=(.*)")),
+		QStringLiteral("PATH=/opt/local/bin:/usr/local/bin:$HOME/bin:\\1"));
 	process.setEnvironment(envlist);
 
 	{