[Overview][Constants][Types][Classes][Procedures and functions][Index] Reference for unit 'ComCtrls' (#lcl)

TCustomTreeView.OnCollapsing

OnCollapsing - specialized event handler while part of the tree is being collapsed.

Declaration

Source position: comctrls.pp line 3615

protected property TCustomTreeView.OnCollapsing : TTVCollapsingEvent
  read FOnCollapsing
  write FOnCollapsing;