[PyQt] QGraphicsView item select

[Andreas Pakulat]

On 11.04.12 06:02:09, Alfredo Junior wrote:
> OK.
> 
> This is a functional example:
> 
> #!/usr/bin/python
> # -*- coding: utf-8 -*-
> 
> import sys
> from PyQt4.QtCore import *
> from PyQt4.QtGui import *
> 
> def itemSelected(self):
>     print "Selection changed"
>     
> app = QApplication(sys.argv)
> grview = QGraphicsView()
> scene = QGraphicsScene()
> scene.addPixmap(QPixmap('on.png'))
> grview.setScene(scene)
> scene.selectionChanged.connect(itemSelected)
> grview.show()
> sys.exit(app.exec_())
> 
> It should run the function itemSelected and print "Selection changed" when I click on the picture (little green square).

Indeed this example does not trigger the the selection change signal. In
the docs of the signal is a pointer to QGraphicsItem::setSelected and a
pointer to QGraphicsScene::setSelectionArea and both functions document
that items are not selectable by default, so it needs to be enabled by
setting the corresponding flag on the item.

Andreas