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Using Data property of TTreeNode

Using Data property of TTreeNode

Using Data property of TTreeNode

I'm trying to create a TreeView that is actually a collapsable list of check boxes.   I'm wondering if I can use the Data property of TTreeNode to incorporate the checkboxes or if this is even a feasable route.  I realize the Data property can be any object, but can it alter the TTreeNode item?

RE: Using Data property of TTreeNode

what do you mean alter tree node?

John Fill


RE: Using Data property of TTreeNode

I realize that the Data property of the TTreeNode is a void * and can therefore be any object, but can it change the attributes of the Item property?  I want the second level nodes of the tree to essentially be check boxes, so I was wondering if the Data can be a TCheckBox and have any effect on the appearance of the TTreeNode.

RE: Using Data property of TTreeNode

What did I do in VisualC++:
1. handle the ntification message from tree with parameter NM_CLICK.
2. Get the coordinates of the click.
3. If you know coordinates transofrm them to client coordinates of the tree.
4. Send a hittest to the tree with coordinates what you've gotten in 3. and get the treeitem.
5. Get the lparam associated with the treeitem.
6. Go on
I think in borland is some thing as I described but borland specific.

John Fill


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