ui: fixed fontMetrics lineheight working with wrong font in QtCodeSnippet

FontMetric specific settings are now applied in the showEvent method, which is executed right before showing the Widget
where the font setting from the stylesheet is already present.

bin/app/data/ApplicationSettings.xml

@@ -5,6 +5,6 @@
 		<FontName>Courier</FontName>
 		<FontSize>12</FontSize>
 		<LinkColor>222 222 222 100</LinkColor>
-		<ActiveLinkColor>210 240 70 50</ActiveLinkColor>
+		<ActiveLinkColor>210 240 70 100</ActiveLinkColor>
 	</code>
 </config>

src/app/qt/element/QtCodeSnippet.cpp

@@ -46,7 +46,6 @@ QtCodeSnippet::QtCodeSnippet(
 	, m_activeTokenId(activeTokenId)
 	, m_digits(0)
 {
-	minimumSizeHint(); // force font loading
 	setObjectName("code_snippet");
 	m_lineNumberArea = new LineNumberArea(this);
 
@@ -56,9 +55,6 @@ QtCodeSnippet::QtCodeSnippet(
 	setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 	setLineWrapMode(QPlainTextEdit::NoWrap);
 
-	int tabWidth = ApplicationSettings::getInstance()->getCodeTabWidth();
-	setTabStopWidth(tabWidth * fontMetrics().width('9'));
-
 	m_highlighter = new QtHighlighter(document());
 
 	std::string displayCode = code;
@@ -75,8 +71,6 @@ QtCodeSnippet::QtCodeSnippet(
 	connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(clickTokenLocation()));
 	connect(this, SIGNAL(selectionChanged()), this, SLOT(clearSelection()));
 
-	setMaximumHeight(sizeHint().height());
-
 	m_digits = lineNumberDigits();
 	updateLineNumberAreaWidth(0);
 }
@@ -87,8 +81,8 @@ QtCodeSnippet::~QtCodeSnippet()
 
 QSize QtCodeSnippet::sizeHint() const
 {
-	int width = lineNumberAreaWidth() + document()->size().width();
-	int height = (document()->size().height() + 1) * fontMetrics().lineSpacing() * 1.1f;
+	int width = lineNumberAreaWidth();
+	int height = (document()->size().height() + 0.7f) * fontMetrics().lineSpacing();
 	return QSize(width, height);
 }
 
@@ -209,6 +203,14 @@ void QtCodeSnippet::resizeEvent(QResizeEvent *e)
 	m_lineNumberArea->setGeometry(QRect(cr.left(), cr.top(), lineNumberAreaWidth(), cr.height()));
 }
 
+void QtCodeSnippet::showEvent(QShowEvent* event)
+{
+	int tabWidth = ApplicationSettings::getInstance()->getCodeTabWidth();
+	setTabStopWidth(tabWidth * fontMetrics().width('9'));
+
+	setMaximumHeight(sizeHint().height());
+}
+
 void QtCodeSnippet::updateLineNumberAreaWidth(int /* newBlockCount */)
 {
 	setViewportMargins(lineNumberAreaWidth(), 0, 0, 0);

src/app/qt/element/QtCodeSnippet.h

@@ -55,7 +55,8 @@ public:
 	void annotateText(const TokenLocationFile& locationFile);
 
 protected:
-	void resizeEvent(QResizeEvent *event);
+	virtual void resizeEvent(QResizeEvent *event);
+	virtual void showEvent(QShowEvent* event);
 
 private slots:
 	void updateLineNumberAreaWidth(int newBlockCount);