Connecting slot for drop event in QGraphicsView

[Ishmael]

How do I connect a dropEvent in a QGraphicsView widget to a slot? Here's a snippet of what I've got so far. This compiles just fine, but it doesn't recognize any drop event.


QGraphicsScene *scene = new QGraphicsScene(this);
QGraphicsView *view = new QGraphicsView(scene);

view->setAcceptDrops(true);
connect(view, SIGNAL(dropEvent()), this, SLOT(myDropEvent()));

void MainWindow::myDropEvent()
{
QDebug("here");
}

What I'm trying to do is drag and drop items from outside my application into an empty QGraphicsView (for instance, an icon from the Desktop). Can this be done?

Thanks!

[Lykurg]

QGraphicsScene::dropEvent() is not a signal! You have to reimplement:

class YourClass
{
//...
dropEvent ( QDropEvent * event );
}


YourClass::dropEvent ( QDropEvent * event )
{
QDebug("here");

}

[Ishmael]

Thanks for your response. Unfortunately, still no luck. I thought making my own class would do the trick.

Here's a sample version of my code. For some reason, it still does not respond to Drop events. I am trying to drag an icon from my desktop onto my GraphicsView window.

Any help you can give me would be greatly appreciated!

Also, I have two questions:
1) What is the difference between QDropEvent and QGraphicsSceneDragDropEvent?
2) As I understand it, I only need to include Q_OBJECT if I want to use signals, is that correct?

(For some reason, when I uncomment Q_OBJECT in my code, I get a bunch of "undefined reference to `vtable for MyGraphicsView'" errors.)



#include <QtGui/QApplication>
#include <QMainWindow>
#include <QGraphicsView>
#include <QDropEvent>

class MyGraphicsView : public QGraphicsView
{
//Q_OBJECT // Do I need Q_OBJECT?

public:
MyGraphicsView(QGraphicsScene *scene);

protected:
//void dropEvent(QGraphicsSceneDragDropEvent *event);
void dropEvent(QDropEvent *event);
};


MyGraphicsView::MyGraphicsView(QGraphicsScene *scene)
{
this->setScene(scene);
}


void MyGraphicsView::dropEvent(QDropEvent *event)
{
qDebug("here");
}


int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QMainWindow window;

QGraphicsScene *scene = new QGraphicsScene;
MyGraphicsView *view = new MyGraphicsView(scene);
view->setAcceptDrops(true);

window.setCentralWidget(view);
window.resize(640, 480);
window.setAcceptDrops(true);
window.show();

return app.exec();
}