graphwidget's zoomIn/Out has been splitted to zoomIn/Out and scaleUp/Down so they can be called separately (cannot modify the modifier keys when calling them)

include/graphwidget.h

@@ -39,6 +39,8 @@ public slots:
     void editNode();
     void zoomIn();
     void zoomOut();
+    void scaleUp();
+    void scaleDown();
     void nodeColor();
     void nodeTextColor();
     void addEdge();

src/graphwidget.cpp

@@ -364,57 +364,53 @@ void GraphWidget::editNode()
 
 void GraphWidget::zoomIn()
 {
-    if (QApplication::keyboardModifiers() &  Qt::ControlModifier)
+    scaleView(qreal(1.2));
+}
+
+void GraphWidget::zoomOut()
+{
+    scaleView(qreal(1 / 1.2));
+}
+
+void GraphWidget::scaleUp()
+{
+    if (!m_activeNode)
     {
-        if (!m_activeNode)
-        {
-            m_parent->statusBarMsg(tr("No active node."));
-            return;
-        }
+        m_parent->statusBarMsg(tr("No active node."));
+        return;
+    }
 
-        // Scale up just the active Node or it's subtree too?
-        if (QApplication::keyboardModifiers() &  Qt::ShiftModifier)
-        {
-            QList <Node *> nodeList = m_activeNode->subtree();
-            foreach(Node *node, nodeList)
-                node->setScale(qreal(1.2),sceneRect());
-        }
-        else
-        {
-            m_activeNode->setScale(qreal(1.2),sceneRect());
-        }
+    // Scale up just the active Node or it's subtree too?
+    if (QApplication::keyboardModifiers() &  Qt::ShiftModifier)
+    {
+        QList <Node *> nodeList = m_activeNode->subtree();
+        foreach(Node *node, nodeList)
+            node->setScale(qreal(1.2),sceneRect());
     }
-    else // zoom in the view
+    else
     {
-        scaleView(qreal(1.2));
+        m_activeNode->setScale(qreal(1.2),sceneRect());
     }
 }
 
-void GraphWidget::zoomOut()
+void GraphWidget::scaleDown()
 {
-    if (QApplication::keyboardModifiers() &  Qt::ControlModifier)
+    if (!m_activeNode)
     {
-        if (!m_activeNode)
-        {
-            m_parent->statusBarMsg(tr("No active node."));
-            return;
-        }
+        m_parent->statusBarMsg(tr("No active node."));
+        return;
+    }
 
-        // Scale down just the active Node or it's subtree too?
-        if (QApplication::keyboardModifiers() &  Qt::ShiftModifier)
-        {
-            QList <Node *> nodeList = m_activeNode->subtree();
-            foreach(Node *node, nodeList)
-                node->setScale(qreal(1 / 1.2),sceneRect());
-        }
-        else
-        {
-            m_activeNode->setScale(qreal(1 / 1.2),sceneRect());
-        }
+    // Scale down just the active Node or it's subtree too?
+    if (QApplication::keyboardModifiers() &  Qt::ShiftModifier)
+    {
+        QList <Node *> nodeList = m_activeNode->subtree();
+        foreach(Node *node, nodeList)
+            node->setScale(qreal(1 / 1.2),sceneRect());
     }
-    else // zoom out of the view
+    else
     {
-        scaleView(qreal(1 / 1.2));
+        m_activeNode->setScale(qreal(1 / 1.2),sceneRect());
     }
 }
 
@@ -619,12 +615,17 @@ void GraphWidget::keyPressEvent(QKeyEvent *event)
 
     case Qt::Key_Plus:
 
-        zoomIn();
+        event->modifiers() & Qt::ControlModifier ?
+            scaleUp() :
+            zoomIn();
+
         break;
 
     case Qt::Key_Minus:
 
-        zoomOut();
+        event->modifiers() & Qt::ControlModifier ?
+            scaleDown() :
+            zoomOut();
         break;
 
     // Hint mode: select a Node vimperator-style.
@@ -713,9 +714,13 @@ void GraphWidget::keyPressEvent(QKeyEvent *event)
 
 void GraphWidget::wheelEvent(QWheelEvent *event)
 {
-    event->delta() > 0 ?
-            zoomIn() :
-            zoomOut();
+    event->modifiers() & Qt::ControlModifier ?
+                (event->delta() > 0 ?
+                        scaleUp() :
+                        scaleDown()) :
+                (event->delta() > 0 ?
+                        zoomIn() :
+                        zoomOut());
 }
 
 void GraphWidget::drawBackground(QPainter *painter, const QRectF &rect)

src/mainwindow.cpp

@@ -319,9 +319,12 @@ void MainWindow::setUpMainToolbar()
     connect(m_editNode, SIGNAL(activated()), m_graphicsView,
             SLOT(editNode()));
 
-    /// @todo pass ctrl
     m_scaleUpNode = new QAction(tr("ScaleUp Node (Ctrl +)"), this);
+    connect(m_scaleUpNode, SIGNAL(activated()), m_graphicsView,
+            SLOT(scaleUp()));
     m_scaleDownNode = new QAction(tr("ScaleDown Node (Ctrl -)"), this);
+    connect(m_scaleDownNode, SIGNAL(activated()), m_graphicsView,
+            SLOT(scaleDown()));
 
     m_nodeColor = new QAction(tr("Node color (c)"), this);
     connect(m_nodeColor, SIGNAL(activated()), m_graphicsView,