private void ObjectDisplay_MouseDown(object sender, MouseEventArgs e) { var objectMap = ObjectDisplay.SelectObject(e.X, e.Y); if (objectMap == null) { return; } var layer = GetSelectedLayer(); if (!LayerIsSelected(layer)) { return; } _lastObjectMapSelected = objectMap; if (!_controlIsPressed) { layer.AddObjectMap(objectMap.Clone(), MapDisplay.Map.Camera); UpdateListBoxObject(layer); } }