Qt-interest Archive, November 2006
AW: AW: QTreeView - repaint() - no effect
Message 1 in thread
Thank you for your interest!
Problem is: I have to update the images whenever the data of OTHER
"cells" has changed. I understand that Qt repaints only the cells
defined by the QModelIndexes of the dataChanged method.
So I connected the model's dataChanged method with a custom slot, which
is called whenever the signal is emitted, regardless of the indexes. In
that slot I tried to call the repaint method - without the desired
effect. Than I substituted the repaint with code resizing the cell's
height, which worked and proved that the method is called at the right
time, however, I can't leave it at that of course ...
r.
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But you should not need to call the repaint. If your model emits the
dataChanged( QMI, QMI) your view should only repaint the indexes that
have been changed.
Scott
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Could you explain when, where and how do you emit dataChanged signal?
After emitting that signal you shouldn't need to call repaint().
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