When a QTreeWidget is placed into the QGraphicsProxyWidget column resizing has a weird behavior.

When a QTreeWidget is placed into the QGraphicsProxyWidget column, resizing has a weird behavior. Most noticeably, the resizing pointer (||) does not show up when expected. When it does show, it does not change to a regular pointer when the mouse leaves the area near the column border.

Test case:

// ---------------------------------------------
#include <QtGui>

int main( int argc, char * argv[] )
{
QApplication app( argc, argv );
QGraphicsScene scene;
QGraphicsView view( & scene );
QTreeWidget tree;

tree.setColumnCount( 3 );
scene.addWidget( & tree );
view.show();

return app.exec();
}
// ---------------------------------------------