GUI: small usability updates in the graph

src/gui/Src/Graph/QGraphScene.cpp

@@ -0,0 +1,12 @@
+#include "QGraphScene.h"
+
+QGraphScene::QGraphScene(QWidget* parent) : QGraphicsScene(parent)
+{
+}
+
+void QGraphScene::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
+{
+    QWidget* parent = (QWidget*)this->parent();
+    parent->setWindowTitle(QString().sprintf("x:%f, y:%f", event->scenePos().x(), event->scenePos().y()));
+    QGraphicsScene::mouseMoveEvent(event);
+}

src/gui/Src/Graph/QGraphScene.h

@@ -0,0 +1,21 @@
+#ifndef QGRAPHSCENE_H
+#define QGRAPHSCENE_H
+
+#include <QWidget>
+#include <QGraphicsScene>
+#include <QGraphicsSceneMouseEvent>
+
+class QGraphScene : public QGraphicsScene
+{
+    Q_OBJECT
+public:
+    explicit QGraphScene(QWidget* parent = 0);
+    void mouseMoveEvent(QGraphicsSceneMouseEvent* event);
+
+signals:
+
+public slots:
+
+};
+
+#endif // QGRAPHSCENE_H

src/gui/Src/Gui/GraphView.cpp

@@ -4,6 +4,7 @@
 #include "Tree.h"
 #include "GraphEdge.h"
 #include "GraphNode.h"
+#include "QGraphScene.h"
 
 #include <ogdf/fileformats/GraphIO.h>
 #include <ogdf/layered/SugiyamaLayout.h>
@@ -72,7 +73,7 @@ void GraphView::setupGraph()
     SL.setLayout(OHL);
     SL.call(GA);
 
-    QGraphicsScene* scene = new QGraphicsScene(this);
+    QGraphScene* scene = new QGraphScene(this);
 
     //draw widget contents (nodes)
     forall_nodes(v, G)

src/gui/Src/Gui/GraphView.ui

@@ -15,10 +15,21 @@
   </property>
   <layout class="QHBoxLayout" name="horizontalLayout">
    <item>
-    <widget class="QGraphicsView" name="graphicsView"/>
+    <widget class="QGraphView" name="graphicsView">
+     <property name="dragMode">
+      <enum>QGraphicsView::ScrollHandDrag</enum>
+     </property>
+    </widget>
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>QGraphView</class>
+   <extends>QGraphicsView</extends>
+   <header>QGraphView.h</header>
+  </customwidget>
+ </customwidgets>
  <resources/>
  <connections/>
 </ui>

src/gui/Src/QGraphView.cpp

@@ -0,0 +1,39 @@
+#include "QGraphView.h"
+#include <QTimeLine>
+
+QGraphView::QGraphView(QWidget* parent)
+    : QGraphicsView(parent)
+{
+
+}
+
+void QGraphView::wheelEvent(QWheelEvent* event)
+{
+    int numDegrees = event->delta() / 8;
+    int numSteps = numDegrees / 15; // see QWheelEvent documentation
+    _numScheduledScalings += numSteps;
+    if (_numScheduledScalings * numSteps < 0) // if user moved the wheel in another direction, we reset previously scheduled scalings
+        _numScheduledScalings = numSteps;
+
+    QTimeLine *anim = new QTimeLine(350, this);
+    anim->setUpdateInterval(20);
+
+    connect(anim, SIGNAL (valueChanged(qreal)), SLOT (scalingTime(qreal)));
+    connect(anim, SIGNAL (finished()), SLOT (animFinished()));
+    anim->start();
+}
+
+void QGraphView::scalingTime(qreal x)
+{
+    qreal factor = 1.0 + qreal(_numScheduledScalings) / 300.0;
+    scale(factor, factor);
+}
+
+void QGraphView::animFinished()
+{
+    if (_numScheduledScalings > 0)
+        _numScheduledScalings--;
+    else
+        _numScheduledScalings++;
+    sender()->~QObject();
+}

src/gui/Src/QGraphView.h

@@ -0,0 +1,22 @@
+#ifndef QGRAPHVIEW_H
+#define QGRAPHVIEW_H
+
+#include <QGraphicsView>
+#include <QWheelEvent>
+
+class QGraphView : public QGraphicsView
+{
+    Q_OBJECT
+public:
+    explicit QGraphView(QWidget* parent = nullptr);
+    void wheelEvent(QWheelEvent* event);
+
+private slots:
+    void scalingTime(qreal x);
+    void animFinished();
+
+private:
+    int _numScheduledScalings;
+};
+
+#endif // QGRAPHVIEW_H

src/gui/x64dbg.pro

@@ -146,7 +146,9 @@ SOURCES += \
     Src/Gui/NotesManager.cpp \
     Src/Gui/NotepadView.cpp \
     Src/Gui/CPUMultiDump.cpp \
-    Src/Gui/GraphView.cpp
+    Src/Gui/GraphView.cpp \
+    Src/Graph/QGraphScene.cpp \
+    Src/QGraphView.cpp
 
 
 HEADERS += \
@@ -234,7 +236,9 @@ HEADERS += \
     Src/Graph/GraphNode.h \
     Src/Graph/Node.h \
     Src/Graph/Tree.h \
-    Src/Gui/GraphView.h
+    Src/Gui/GraphView.h \
+    Src/Graph/QGraphScene.h \
+    Src/QGraphView.h
 
 FORMS += \
     Src/Gui/MainWindow.ui \