I'd like my custom item to become an explicit mouse grabber on mouse press event. I call grabMouse() inside mousePressEvent() handler, but it does not receive any consecutive mouse move and release events (imagine, I try to drag this item).
As far as I can see from QGraphicsScene's sources QGraphicsScenePrivate::mousePressEventHandler() forwards mouse press event to the item under cursor, making it implicit mouse grabber a priori. After this mouse event was handled by the target item, the former one releases mouse grabber state. While in general this seems to be okay, I expect this custom item to keep mouse grabber state when it was set explicitly. Indeed, what actually grabMouse() does, being called from mousePressEvent(), is updates lastMouseGrabberItemHasImplicitMouseGrab flag to false. So, I guess, ungrabMouse() should be called only in case item is still an implicit mouse grabber. Does this suggestion make sense? Should the current behaviour be considered as a false one? Regards, Dmitrii.
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