TTreeView.OnGetSelectedIndex Event

Occurs when the tree view looks up the SelectedIndex of a node.

Pascal

property OnGetSelectedIndex: TTVExpandedEvent;

C++

__property TTVExpandedEvent OnGetSelectedIndex;

Description

Write an OnGetSelectedIndex event handler to change the selected image index of a node before it is drawn.

Delphi Examples:

Copy Code

{
The following example shows how the OnGetImageIndex event 
handler can be used to indicate a different state for the
node.
} 
procedure TCustomDrawForm.TVGetImageIndex(Sender: TObject; Node: TTreeNode);
begin
  if Node.HasChildren then
    if Node.Expanded then
      Node.ImageIndex := 3
    else
      Node.ImageIndex := 0
  else
    Node.ImageIndex := 1;
end;

procedure TCustomDrawForm.TVGetSelectedIndex(Sender: TObject; Node: TTreeNode);
begin
  Node.SelectedIndex := Node.ImageIndex;
end;