// Reminder: _component might no longer be a valid instance
// so one should request a new one.
//
public override void Undo(UndoEngine engine)
{
if (_beforeChange == null)
{
// Console.WriteLine ("ComponentChangeAction.Undo: ERROR: UndoUnit is not complete.");
return;
}
// Console.WriteLine ("ComponentChangeAction.Undo (" + _componentName + "." + _member.Name + ")");
IDesignerHost host = (IDesignerHost)engine.GetRequiredService(typeof(IDesignerHost));
_component = host.Container.Components[_componentName];
ComponentSerializationService serializationService = engine.GetRequiredService(
typeof(ComponentSerializationService)) as ComponentSerializationService;
serializationService.DeserializeTo(_beforeChange, host.Container);
SerializationStore tmp = _beforeChange;
_beforeChange = _afterChange;
_afterChange = tmp;
}
public override void Undo(UndoEngine engine)
{
IDesignerHost host = engine.GetRequiredService(typeof(IDesignerHost)) as IDesignerHost;
if (_added)
{
// Console.WriteLine ("Component*Add*RemoveAction.Undo (" + _componentName + ")");
IComponent component = host.Container.Components[_componentName];
if (component != null) // the component might have been destroyed already
{
host.DestroyComponent(component);
}
_added = false;
}
else
{
// Console.WriteLine ("ComponentAdd*Remove*Action.Undo (" + _componentName + ")");
ComponentSerializationService serializationService = engine.GetRequiredService(
typeof(ComponentSerializationService)) as ComponentSerializationService;
serializationService.DeserializeTo(_serializedComponent, host.Container);
_added = true;
}
}