void HandleDoubleClicked (object sender, BrowsableEventArgs args)
{
Widget widget = sender as Widget;
if (widget == null)
return;
switch (ViewMode) {
case ModeType.IconView:
icon_view.FocusCell = args.Items [0];
SetViewMode (ModeType.PhotoView);
break;
case ModeType.PhotoView:
SetViewMode (ModeType.IconView);
break;
}
}