QTreeview DecorationRole icon depending on expanded

[ctgrund]

Hi,

In a QTreeView I would like to show a DecorationRole icon depending on the expanded value, e.g. open folder icon for expanded, closed folder for not expanded.

Thanks!

Thomas

[Santosh Reddy]

You could use the QTreeView's signal expanded(const QModelIndex & index), and connect it to a slot of some object which can access the model->setData(OpenIcon, Qt::DecorationRole), and similarly use the QTreeView's signal collapsed(const QModelIndex & index), and connect it to a slot of some object which can access the model->setData(CloseIcon, Qt::DecorationRole).

Note that, when you have multiple views connected to same model, expanding the item in a view will not expand the items in other view, but their icon will change, and will appear that the icon and actual state (expanded/collapsed) do not match.

[ctgrund]

Thank you.

Does it make sense to make a feature request for such things? If yes, how to make this?