diff options
author | Robin Gareus <robin@gareus.org> | 2017-03-20 16:30:01 +0100 |
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committer | Robin Gareus <robin@gareus.org> | 2017-03-20 17:12:08 +0100 |
commit | 235631a618de23793f0915aa7dc9b2f669b766f9 (patch) | |
tree | 43558749ca4878f31a4bc1514d24a2b69372402c /libs/gtkmm2ext | |
parent | f69808b372f6963a1a7bb8be78b9302ea842817d (diff) |
Add a EventBox wrapper to forward unmap events.
Diffstat (limited to 'libs/gtkmm2ext')
-rw-r--r-- | libs/gtkmm2ext/gtkmm2ext/eventboxext.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/libs/gtkmm2ext/gtkmm2ext/eventboxext.h b/libs/gtkmm2ext/gtkmm2ext/eventboxext.h new file mode 100644 index 0000000000..9f164ef9bb --- /dev/null +++ b/libs/gtkmm2ext/gtkmm2ext/eventboxext.h @@ -0,0 +1,58 @@ +/* + * 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 __gtkmm2ext_eventbox_ext_h__ +#define __gtkmm2ext_eventbox_ext_h__ + +#include <gtkmm/eventbox.h> + +#include "gtkmm2ext/visibility.h" + +namespace Gtkmm2ext { + +class LIBGTKMM2EXT_API EventBoxExt : public Gtk::EventBox +{ +public: + 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 |