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/*
* Copyright (C) 2017 Robin Gareus <robin@gareus.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef _WIDGETS_EVENTBOX_EXT_H_
#define _WIDGETS_EVENTBOX_EXT_H_
#include <gtkmm/eventbox.h>
#include "widgets/visibility.h"
namespace ArdourWidgets {
class LIBWIDGETS_API EventBoxExt : public Gtk::EventBox
{
public:
EventBoxExt ();
virtual ~EventBoxExt () {}
protected:
/* gtk2's gtk/gtkcontainer.c does not
* unmap child widgets if the container has a window.
*
* (this is for historical reasons and optimization
* because back in the day each GdkWindow was backed by
* an actual windowing system surface).
*
* In Ardour's case an EventBox is used in the Editor's top-level
* and child-widgets (e.g. Canvas::GtkCanvas never receive an unmap.
*
* However, when switching Tabbable pages, we do need to hide overlays
* such as ArdourCanvasOpenGLView
*
*/
void on_unmap () {
Gtk::EventBox::on_unmap();
if (get_child ()) {
get_child()->unmap();
}
}
};
} /* namespace */
#endif
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