node kept inside the scene done

graphwidget.cpp

@@ -59,6 +59,7 @@ GraphWidget::GraphWidget(QWidget *parent) :
 
     m_activeNode = node1;
     m_activeNode->setFocus();
+
 }
 
 QGraphicsScene *GraphWidget::getScene()

node.cpp

@@ -35,44 +35,34 @@ QVariant Node::itemChange(GraphicsItemChange change, const QVariant &value)
     qDebug() << __PRETTY_FUNCTION__;
 
     switch (change) {
-        case ItemPositionHasChanged:
-            foreach (Edge *edge, m_edgeList) edge->adjust();
-            break;
-        default:
-            break;
-    };
 
-    return QGraphicsItem::itemChange(change, value);
-}
+    case ItemPositionChange:
 
-void Node::mousePressEvent(QGraphicsSceneMouseEvent *event)
-{
-    qDebug() << __PRETTY_FUNCTION__;
+        if (change == ItemPositionChange && scene()) {
+            // value is the new position.
+            QPointF newPos = value.toPointF();
+            QRectF rect (scene()->sceneRect().topLeft(),
+                         scene()->sceneRect().bottomRight()-boundingRect().bottomRight());
 
-    prevpt = event->pos();
-
-    update();
-    QGraphicsTextItem::mousePressEvent(event);
-}
-
-void Node::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+            if (!rect.contains(newPos))
             {
-    qDebug() << __PRETTY_FUNCTION__;
-
-    if (!scene()->sceneRect().contains(sceneBoundingRect()))
-    {
-        setPos(prevpt);
+                // Keep the item inside the scene rect.
+                newPos.setX(qMin(rect.right(), qMax(newPos.x(), rect.left())));
+                newPos.setY(qMin(rect.bottom(), qMax(newPos.y(), rect.top())));
+                return newPos;
             }
-
-    update();
-    QGraphicsTextItem::mouseReleaseEvent(event);
         }
+        break;
 
-void Node::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
-{
-    qDebug() << __PRETTY_FUNCTION__;
+    case ItemPositionHasChanged:
+
+        foreach (Edge *edge, m_edgeList) edge->adjust();
+        break;
+    default:
+        break;
+    };
 
-    QGraphicsTextItem::mouseMoveEvent(event);
+    return QGraphicsItem::itemChange(change, value);
 }
 
 void Node::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *w)
@@ -85,6 +75,4 @@ void Node::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWid
         painter->drawRect(QRect(boundingRect().topLeft().toPoint(),
                                 boundingRect().bottomRight().toPoint() -
                                 QPoint(1,1)));
-
-        prevpt = pos();
 }

node.h

@@ -11,23 +11,21 @@ class GraphWidget;
 class Node : public QGraphicsTextItem
 {
 public:
+
     Node(GraphWidget *graphWidget = 0);
 
     void addEdge(Edge *edge);
     QList<Edge *> edges() const;
 
 protected:
+
     QVariant itemChange(GraphicsItemChange change, const QVariant &value);
-    void mousePressEvent(QGraphicsSceneMouseEvent *event);
-    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
-    void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
 
-
 private:
+
     QList<Edge *> m_edgeList;
     GraphWidget *m_graph;
-    QPointF prevpt;
 };
 
 #endif // NODE_H

qtmindmap.pro.user

@@ -182,7 +182,7 @@
     <value key="Qt4ProjectManager.Qt4RunConfiguration.CommandLineArguments" type="QString"></value>
     <value key="Qt4ProjectManager.Qt4RunConfiguration.ProFile" type="QString">qtmindmap.pro</value>
     <value key="Qt4ProjectManager.Qt4RunConfiguration.UseDyldImageSuffix" type="bool">false</value>
-    <value key="Qt4ProjectManager.Qt4RunConfiguration.UseTerminal" type="bool">true</value>
+    <value key="Qt4ProjectManager.Qt4RunConfiguration.UseTerminal" type="bool">false</value>
     <valuelist key="Qt4ProjectManager.Qt4RunConfiguration.UserEnvironmentChanges" type="QVariantList"/>
     <value key="Qt4ProjectManager.Qt4RunConfiguration.UserWorkingDirectory" type="QString"></value>
     <value key="RunConfiguration.QmlDebugServerPort" type="uint">3768</value>