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  4. How to write custom singnal and slots for custom QGraphicsPolygonItem?
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How to write custom singnal and slots for custom QGraphicsPolygonItem?

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  • O Offline
    O Offline
    opengpu
    wrote on last edited by
    #1

    how to write custom singnal and slots for custom QGraphicsPolygonItem?
    i found that QGraphicsPolygonItem is not inherited from QObejct...
    and i tried add Q_OBJECT for my class, and compiled wrong...

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    • J Offline
      J Offline
      jalomic
      wrote on last edited by
      #2

      You can inherit QGraphicsPolygonItem from QObject yourself

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      • A Offline
        A Offline
        andreyc
        wrote on last edited by
        #3

        As jalomic suggested inherit you custom QGraphicsPolygonItem from both classes QObject and QGraphicsPolygonItem

        Please note that QObject must be first in the inheritance chain. Otherwise moc will not recognize it.
        @
        class MyGPI : public QObject, public QGraphicsPolygonItem
        {
        Q_OBJECT
        public:
        ...
        }
        @

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