Hi Guilherme,
sorry for the late answer.
1. I see that it needs to configure the model before setting it to the
tree (configureTriState). That is going to be a problem when adding
new items to the model. The user will have to remember to configure
each item before adding it to the tree. It can lead to some items
being configured and others don't.
Maybe a solution could be configureItem as a delegate function, to
centralize that.
I have done the setting on the model, because the Tree shows only the
open nodes. So the model would be inconsistent for items which are not
shown. Therefore it is not possible to set the checked state with the tree.
2. I don't know how the checkboxes in the tree could be useful the way
it is. But if we could use the checkboxes to determine the selection
of the tree, then it could be used in forms. Is there an easy way to
bind the checkbox to the selection? I tried some things but all was
based on subclass-ing (almost) all classes involved. Maybe there is a
easier way, or should exist.
(from what I see looking at other frameworks, the checkboxes are
indeed used to select items in the widget (ExtJS, ajax.org
<http://ajax.org> UI).
At the moment the Tree only supports single selection. Therefore it is
not possible to bind the selection with the checkboxes. I think when the
multi selection is implemented a binding between the selection and the
checkboxes should be possible and 3. is then not needed.
3. If 2. is considered, maybe the selection code in VirtualTree could
be in a Selection Manager class. And maybe, another selection manager
class (different from the default one) could handle checkboxes as
selection widgets. Imagine being able to do so:
tree.setSelectionManager(new
qx.ui.tree.selection.CheckboxSelectionManager());
and it all would be handled by that class.
Cheers,
Chris
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