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Getting coordinate relative to QGraphicsItem on mouse click in QGraphicsView

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  • L Offline
    L Offline
    lansing
    wrote on last edited by
    #1

    I have a rectangle QGraphicsView and a QGraphicsItem inside, I want to retrieve the x-position relative to the item when I click in the view.

    For example, I have a graphicsview of 1000 px wide and a graphicsItem of 100 px wide, the item is placed at the 500 px point in the view. When I clicked on 502 px in the view, I want it to return something like a QPoint with x=2.

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    • B Offline
      B Offline
      Bonnie
      wrote on last edited by Bonnie
      #2

      I'm not familiar with the graphics view framework, but from the information of doc, I think you can:
      step1. map from view to scene by QGraphicsView::mapToScene.
      step2. map from scene to item by QGraphicsItem::mapFromScene.
      I haven't found a direct mapping method from QGraphicsView to QGraphicsItem.

      L 1 Reply Last reply
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      • B Bonnie

        I'm not familiar with the graphics view framework, but from the information of doc, I think you can:
        step1. map from view to scene by QGraphicsView::mapToScene.
        step2. map from scene to item by QGraphicsItem::mapFromScene.
        I haven't found a direct mapping method from QGraphicsView to QGraphicsItem.

        L Offline
        L Offline
        lansing
        wrote on last edited by
        #3

        @Bonnie

        Thank you this works.

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