[Qt-interest] Find main window from widget

[yunqiu liu]

Hi Derek,

you could try,
1, declare a signal function in subclass of QGraphicsItem
   For example, in subclass "sGraphicsItem",
   signals:
   void pos_hoverMoveEvent_signal(int,int);
2, in function sGraphicItem::hoverMoveEvent ( QGraphicsSceneHoverEvent * event )
   get x and y position
   emit pos_hoverMoveEvent_signal(x,y);
3, try to build the connect of signal and slot callback function between two 
objects(graphicsitem and label)

Thanks,
YQ



________________________________
From: "Cole, Derek" <dcole at integrity-apps.com>
To: qt-interest at qt.nokia.com
Sent: Sat, January 22, 2011 9:34:56 AM
Subject: [Qt-interest] Find main window from widget

Find main window from widget 

Hello,

If I have subclass a QGraphicsItem, and I want to send some information from the 
hoverMoveEvent back to a label that is in my main UI, how do I get that? Do I 
just loop over event.widget().parentWidget() until that returns zero, and then I 
can try to do a findChild<QLabel *>(labelName)?

I thought there would be an easy way to find another widget from within one, but 
its not popping out at me anyway.

I basically want a label to update with my pixel coordinates as I mouse over 
this QGraphicsItem 



      
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