Getting mouse coordinates from the QGraphicsView's referential

I'm using Qt 4.8.4 on Qt Creator 2.0.1.

I have created a new widget to replace QGraphicsView on my mainwindow, in order to override wheelevents, mousepressevents, etc. I logically inherit QGraphicsView.

I'm using a mousemoveevent to show the coordinates on a label, also on the widget.

This is my code

Code:

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void Graph::mouseMoveEvent(QMouseEvent *event)
{
    QPointF position = event->posF();
 
    ui->mouse_coordinates->setText("( " + QString::number((int)position.x())
                                   + ", " + QString::number((int)position.y())
                                   + " )");
}

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But this always show the coordinates in the widget's window (being (0, 0) the top left corner). Because I use zoom and scroll bars on my reimplemented QGraphicsView, these absolute coordinates are useless, since I need this to identify points in a graph drawn in the View.

Is there a way of converting these coordinates to the QGraphicsView referential, i.e., for example, if I have a square drawn at the QGraphicsView (0, 0) (that's not located at the top left corner), how do I get the coordinates (0, 0) when my mouse hovers that square?

P.S.: I have tried this with mousepressevent as well with the same result

Thank you,
Bernardo M.

They already are in the view's coordinate space. What you want is the scene coordinate space. You can use QGraphicsView::mapToScene() for that or you can reimplement the mouse event directly in the scene.

Quote:

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Originally Posted by wysota

They already are in the view's coordinate space. What you want is the scene coordinate space. You can use QGraphicsView::mapToScene() for that or you can reimplement the mouse event directly in the scene.

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Yes, I'm sorry, that's exactly what I meant.
I wiil try that. thank you.