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authorGabriel de Dietrich <gabriel.dietrich-de@nokia.com>2010-03-10 15:53:06 (GMT)
committerGabriel de Dietrich <gabriel.dietrich-de@nokia.com>2010-03-10 16:54:47 (GMT)
commit7baaea978200c82fdf65e3934cfa373edeca6524 (patch)
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parent1436c4f2e41100b45eed58edc5fc290fa94c976b (diff)
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Slow QTreeView::layout() with many (> 10000) children
When updating the QTreeViewItem::total field in layout(), we used to call QTreeViewPrivate::viewIndex() to get the parent item, which is O(n). We have now introduced 'parentItem' in QTreeViewItem wich makes this O(1), with a small penality when inserting and removing elements in QTreeViewPrivate::viewItems. The QTreeViewPrivate::checkViewItems() is left inside the code for further debugging. Reviewed-by: Olivier Task-number: QTBUG-8885
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