EDIT

this seems to work, but the checkboxes are not grayed when a child or some children are selected.

Katja Luther wrote:

this seems to work, but the checkboxes are not grayed when a child or some children are selected.

Setting the checkboxes to gray seems to be platform dependant. On the Lubuntu linux distribution, for example, this state cannot be shown. Therefore the font is changed according to the selection state. bold if all children are selected, italic if some children are selected and standard if nothing is selected.

Can you please test in some cases if this works for you especially when re-opening a dialog with saved areas? If the grayed state is not that important we may close this ticket.

To remind me to review.

It works already very good. 2 minor issues:

1. The state check should always include all children AND recursive children. E.g. here

MyAreas should have state "some" not "all" as Area1 is not selected (though all of it's subareas are selected so the current behaviour has some logic).

1. Even if greying the checkbox does not work on Ubuntu for some reason I think we should still try to do it and see if it works e.g. on Windows. A grey checkbox is more intuitive then italics. But of course we will keep the italics too to make sure that the dialog generally works on all systems.

all implemented

Andreas Müller wrote:

1. Even if greying the checkbox does not work on Ubuntu for some reason I think we should still try to do it and see if it works e.g. on Windows. A grey checkbox is more intuitive then italics. But of course we will keep the italics too to make sure that the dialog generally works on all systems.

The checkboxes are still not grey on Windows. Is this not possible? Then leave a message. Or just forgot?

All the rest works as expected now as far as I can see.

Andreas Müller wrote:

There is still an issue with the usage e.g. for distribution editor. Here you may not want that the vocabulary itself can be selected. So the top level nodes must not be selectable only the state should change depending on the selection of the (recursive) children. But of course it would be nice to have the typical tristate behavior here (empty if no child is selected, unknown state if some children are selected and checked state if all children are selected.
I think it should be configurable if the topmost level can be selected or not.

This is implemented

Patrick Plitzner wrote:

Andreas Müller wrote:

There is still an issue with the usage e.g. for distribution editor. Here you may not want that the vocabulary itself can be selected. So the top level nodes must not be selectable only the state should change depending on the selection of the (recursive) children. But of course it would be nice to have the typical tristate behavior here (empty if no child is selected, unknown state if some children are selected and checked state if all children are selected.
I think it should be configurable if the topmost level can be selected or not.

This is implemented

OK, this works. Only it feels a bit strange that there is a checkbox which is always empty and can not be clicked and at the same time all the childrens are selected, e.g.:

So best would be to handle this checkbox as standard checkbox with in trees with unchecked=no child selected, checked=all children selected, tristate=some children selected. Alternatively, if possible, we could simply remove the checkbox.
However, this has no high priority, so if not easy to implement we can move it to a follow up ticket.

Added remaining issues to #8054