When the user presses a mouse button and begins to move the mouse, it generates a dragBeginEvent (or something like that.) If it begins in a scene item, the framework dispatches it to the item's handler (through the default implementation of the scene's handler.) Otherwise, the event is probably ignored by the scene's handler (I'm not sure about this.)

So if you want the user to be able to draw from anywhere, even from inside an item, you might need to write code in both item and scene handlers (reimplemented.)

@void Scene::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
// Calling super
QGraphicsScene::mousePressEvent(event);

  qDebug()<<"Scene Clicked!";

}@

Do you mean , when i want to drag an object, in the Scene handlers , Invoke the item's handlers manually?
and when i suppose to draw on the scene , don't invoke that.

yes? Do i get True?

Drag is already supported by the "framework":http://harmattan-dev.nokia.com/docs/library/html/qt4/graphicsview.html#drag-and-drop. You don't need to handle mousePressEvent to get drag and drop events. You need to interpret drag and drop events to mean to the user: move items (or create item, whatever you want it to mean.)

Event dispatching for widgets is different from event dispatching for the QGraphicsView framework: events first go to the view, then the scene, then items; seemingly the reverse of widgets. But thats the default, and hidden, until you start reimplementing.

class Rect :public QObject, public QGraphicsRectItem
{
void mousePressEvent(QGraphicsSceneMouseEvent *event)
{
qDebug()<<"Rect Clicked";
}
}

@

And when i clicked on the RECT item , print "Scene clicked" !!!!