class SubrequirementTreeItem extends TreeItem {
var subrequirementResourceID:Integer;
var checkBox:CheckBox;
}

override var cellFactory = function():TreeCell {
var cb:CheckBox;
def cell:TreeCell = TreeCell {
node: cb = CheckBox {text: bind (cell.item as String) visible: bind (cell.item != null)
onMouseClicked: function (e) {
if (cell.treeItem.leaf == true) {
if (cb.selected == true) {
insert (cell.treeItem as RunSetupMediator.SubrequirementTreeItem).subrequirementResourceID into targetCategoryViewSubrequirementsSelected;
}
else {
delete (cell.treeItem as RunSetupMediator.SubrequirementTreeItem).subrequirementResourceID from targetCategoryViewSubrequirementsSelected;
}

}
else {
if (cb.selected == true) {
for (child in cell.treeItem.children) {
(child as RunSetupMediator.SubrequirementTreeItem).checkBox.selected = true;
insert (child as RunSetupMediator.SubrequirementTreeItem).subrequirementResourceID into targetCategoryViewSubrequirementsSelected;
}
}
else {
for (child in cell.treeItem.children) {
(child as RunSetupMediator.SubrequirementTreeItem).checkBox.selected = false;
delete (child as RunSetupMediator.SubrequirementTreeItem).subrequirementResourceID from targetCategoryViewSubrequirementsSelected;
}
}
}
}

}
onUpdate: function() {
if (cell.treeItem.leaf) {
(cell.treeItem as RunSetupMediator.SubrequirementTreeItem).checkBox = cell.node as CheckBox;
}
cell.disclosureNode.visible = (cell.item != null) and not cell.treeItem.leaf;
}
};
}

One possible workaround would be to bind the CheckBoxTreeCell.selected property (from my example in this post) to be not only related to the checkbox selection, but also the parent selection (assuming you’ve created a TreeItem subclass that contains the selection state – which I don’t show here). This would take a bit of work (with mouse and key events) to ensure the correct value is used, but from it you should be able to get the result you’re wanting.

I may take a further look into this suggestion shortly to see if I can clarify my point. I also know Richard Bair improved upon my proof of concept above, so perhaps he might want to add a comment.

– Jonathan

var cb:CheckBox;
def cell:TreeCell = TreeCell {
node: cb = CheckBox {text: bind (cell.item as String) visible: bind (cell.item != null)
onMouseClicked: function (e) {
if (cell.treeItem.leaf == true) {
if (cb.selected == true) {
insert (cell.treeItem as RunSetupMediator.SubrequirementTreeItem).subrequirementResourceID into targetCategoryViewSubrequirementsSelected;
}
else {
delete (cell.treeItem as RunSetupMediator.SubrequirementTreeItem).subrequirementResourceID from targetCategoryViewSubrequirementsSelected;
}
}
else {
if (cb.selected == true) {
cb.selected = false;
// Need to go from treeItem to TreeCell ??????
}
}
}

}
onUpdate: function() {
cell.disclosureNode.visible = (cell.item != null) and not cell.treeItem.leaf;
}
}

Question: TreeCell has a reference to TreeItem and TreeView. How does one navigate from TreeView/TreeItem to it’s corresponding TreeCells? What I would like to do is create a TreeNodeCheckBox such that when it is checked, all its children become checked.

Thanks.