ImageEn, unit imageenproc

TImageEnProc.CanUndo

TImageEnProc.CanUndo


Declaration

property CanUndo: Boolean;


Description

Returns True when there are entries in the Undo stack (i.e. so Undo can be used).

Note: CanUndo will be False after calling ClearAllUndo or ClearUndo if there is only one saved image.


Demo

Demo  Demos\ImageEditing\UndoRedo\UndoRedo.dpr


Example

procedure TMainForm.btnUndoClick(Sender: TObject);
begin
  If ImageEnView1.Proc.CanUndo then
    ImageEnView1.Proc.Undo
  else
    ShowMessage('Nothing to Undo!');
end;


See Also

Undo