ui: Added style for graph zoom buttons

* moved zoom buttons to QtGraphicsView due to stylesheet and repositioning on resize

src/lib_gui/qt/graphics/QtGraphicsView.cpp

@@ -14,7 +14,9 @@
 #include "qt/view/graphElements/QtGraphNodeData.h"
 #include "qt/view/graphElements/QtGraphNodeBundle.h"
 #include "qt/utility/QtContextMenu.h"
+#include "qt/utility/utilityQt.h"
 #include "settings/ApplicationSettings.h"
+#include "utility/ResourcePaths.h"
 
 QtGraphicsView::QtGraphicsView(QWidget* parent)
 	: QGraphicsView(parent)
@@ -25,6 +27,8 @@ QtGraphicsView::QtGraphicsView(QWidget* parent)
 	, m_left(false)
 	, m_right(false)
 	, m_shift(false)
+	, m_zoomInButtonSpeed(20.0f)
+	, m_zoomOutButtonSpeed(-20.0f)
 {
 	setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
 
@@ -44,6 +48,20 @@ QtGraphicsView::QtGraphicsView(QWidget* parent)
 	m_copyNodeNameAction->setStatusTip(tr("Copies the name of this node to the clipboard"));
 	m_copyNodeNameAction->setToolTip(tr("Copies the name of this node to the clipboard"));
 	connect(m_copyNodeNameAction, SIGNAL(triggered()), this, SLOT(copyNodeName()));
+
+	m_zoomInButton = new QPushButton(this);
+	m_zoomInButton->setObjectName("zoom_in_button");
+	m_zoomInButton->setAutoRepeat(true);
+	m_zoomInButton->setToolTip("Zoom in (Shift + Mousewheel forward)");
+	connect(m_zoomInButton, SIGNAL(pressed()), this, SLOT(zoomInPressed()));
+
+	m_zoomOutButton = new QPushButton(this);
+	m_zoomOutButton->setObjectName("zoom_out_button");
+	m_zoomOutButton->setAutoRepeat(true);
+	m_zoomOutButton->setToolTip("Zoom out (Shift + Mousewheel back)");
+	connect(m_zoomOutButton, SIGNAL(pressed()), this, SLOT(zoomOutPressed()));
+
+	refreshStyle();
 }
 
 float QtGraphicsView::getZoomFactor() const
@@ -118,6 +136,28 @@ void QtGraphicsView::updateZoom(float delta)
 	updateTransform();
 }
 
+void QtGraphicsView::refreshStyle()
+{
+	m_zoomInButton->setIcon(utility::createButtonIcon(
+		ResourcePaths::getGuiPath() + "graph_view/images/zoomin.png",
+		"search/button"
+	));
+
+	m_zoomOutButton->setIcon(utility::createButtonIcon(
+		ResourcePaths::getGuiPath() + "graph_view/images/zoomout.png",
+		"search/button"
+	));
+}
+
+void QtGraphicsView::resizeEvent(QResizeEvent* event)
+{
+	m_zoomInButton->setGeometry(QRect(8, event->size().height() - 50, 19, 19));
+	m_zoomOutButton->setGeometry(QRect(8, event->size().height() - 27, 19, 19));
+
+	m_zoomInButton->setIconSize(QSize(15, 15));
+	m_zoomOutButton->setIconSize(QSize(15, 15));
+}
+
 void QtGraphicsView::mousePressEvent(QMouseEvent *event)
 {
 	if (event->button() == Qt::LeftButton && !itemAt(event->pos()))
@@ -405,6 +445,16 @@ void QtGraphicsView::copyNodeName()
 	QApplication::clipboard()->setText(m_clipboardNodeName.c_str());
 }
 
+void QtGraphicsView::zoomInPressed()
+{
+	updateZoom(m_zoomInButtonSpeed);
+}
+
+void QtGraphicsView::zoomOutPressed()
+{
+	updateZoom(m_zoomOutButtonSpeed);
+}
+
 bool QtGraphicsView::moves() const
 {
 	return m_up || m_down || m_left || m_right;

src/lib_gui/qt/graphics/QtGraphicsView.h

@@ -4,6 +4,7 @@
 #include <memory>
 
 #include <QGraphicsView>
+#include <QPushButton>
 
 #include "utility/file/FilePath.h"
 
@@ -27,9 +28,13 @@ public:
 
 	void updateZoom(float delta);
 
+	void refreshStyle();
+
 protected:
-	void mousePressEvent(QMouseEvent *event);
-	void mouseReleaseEvent(QMouseEvent *event);
+	void resizeEvent(QResizeEvent* event);
+
+	void mousePressEvent(QMouseEvent* event);
+	void mouseReleaseEvent(QMouseEvent* event);
 
 	void keyPressEvent(QKeyEvent* event);
 	void keyReleaseEvent(QKeyEvent* event);
@@ -48,6 +53,9 @@ private slots:
 	void exportGraph();
 	void copyNodeName();
 
+	void zoomInPressed();
+	void zoomOutPressed();
+
 private:
 	bool moves() const;
 
@@ -71,6 +79,12 @@ private:
 
 	QAction* m_exportGraphAction;
 	QAction* m_copyNodeNameAction;
+
+	QPushButton* m_zoomInButton;
+	QPushButton* m_zoomOutButton;
+
+	float m_zoomInButtonSpeed;
+	float m_zoomOutButtonSpeed;
 };
 
 #endif // QT_GRAPHICS_VIEW_H