TTreeView.OnGetSelectedIndex property
Event handler signalled to get the ordinal position for the image displayed for a selected node on the tree view control.
Declaration
property OnGetSelectedIndex:;Description
OnGetSelectedIndex is a
TTVExpandedEvent property with
the event handler signalled to get the index position for the selected image
on a tree view node. The index is an ordinal position in the Images assigned
for the control.
OnGetSelectedIndex is signalled (when assigned) from the OnGetSelectedIndex method, and occurs when a tree node is painted to the tree view control. It allows a value assigned to the SelectedIndex property in the tree node to be overridden, or set to a default value. OnGetSelectedIndex is not signalled if Images has not been assigned (is Nil).
Arguments to the event handler include:
- Sender
- The object instance (TCustomTreeView) for the event.
- Node
- The TTreeNode instance examined in the handler routine.
The handler routine should select and assign a value to the SelectedIndex property in Node; there is no way to provide the value as a separate argument or return value.
Use OnGetImageIndex to get the image index for the a node which is not selected on the tree view control.
This description is the one of ComCtrls.TCustomTreeView.OnGetSelectedIndex.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.