RAD Studio VCL Reference
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ComCtrls.TTVCollapsingEvent Type
ComCtrls | Description | See Also
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Used in the TCustomTreeView.OnCollapsing event.

Pascal
TTVCollapsingEvent = procedure (Sender: TObject; Node: TTreeNode; var AllowCollapse: Boolean) of object;
C++
(Sender: TObject; Node: TTreeNode; var AllowCollapse: Boolean) ( TTVCollapsingEvent)();
File
Description

This event is used in the TCustomTreeView.OnCollapsing event when a node is about to be collapsed. 

The Sender parameter is the tree view whose selected node collapses, and the Node parameter specifies the node that is about to be collapsed. AllowCollapse indicates whether the node can collapse or not. 

 

See Also
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