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

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

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