public ClippingPlaneGridContextMenu(GridView parent)
{
_gV_parent = parent;
_gV_parent.SelectedItemsChanged += On_Parent_SelectedItemsChanged;
InitializeCommands();
// Selection
Items.Add(_selectCommand.CreateMenuItem());
Items.Add(new SeparatorMenuItem());
// Visuals
Items.Add(_planViewCommand.CreateMenuItem());
Items.Add(new SeparatorMenuItem());
}