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add new VisibilityTracker class to implement cycling window visibility "properly" - i.e. avoiding hide+show/present to get a hidden or partially obscured window visible again

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This commit is contained in:
Paul Davis 2013-03-25 20:03:59 -04:00
parent 43b09fdd9a
commit bd2d4d4247
3 changed files with 97 additions and 0 deletions
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46
libs/gtkmm2ext/gtkmm2ext/visibility_tracker.h Normal file
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@ -0,0 +1,46 @@
/*
Copyright (C) 2013 Paul Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __libgtkmm2ext_visibility_tracker__
#define __libgtkmm2ext_visibility_tracker__
#include <gdk/gdkevents.h>
namespace GTK {
class Window;
}
namespace Gtkmm2ext {
class VisibilityTracker {
public:
VisibilityTracker (Gtk::Window&);
virtual ~VisibilityTracker() {}
void cycle_visibility ();
private:
Gtk::Window& window;
GdkVisibilityState _visibility;
bool handle_visibility_notify_event (GdkEventVisibility*);
};
}
#endif /* __libgtkmm2ext_visibility_tracker__ */

50
libs/gtkmm2ext/visibility_tracker.cc Normal file
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@ -0,0 +1,50 @@
/*
Copyright (C) 2013 Paul Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <gtkmm/window.h>
#include "gtkmm2ext/visibility_tracker.h"
using namespace Gtkmm2ext;
VisibilityTracker::VisibilityTracker (Gtk::Window& win)
: window (win)
, _visibility (GdkVisibilityState (0))
{
window.add_events (Gdk::VISIBILITY_NOTIFY_MASK);
window.signal_visibility_notify_event().connect (sigc::mem_fun (*this, &VisibilityTracker::handle_visibility_notify_event));
}
bool
VisibilityTracker::handle_visibility_notify_event (GdkEventVisibility* ev)
{
_visibility = ev->state;
return false;
}
void
VisibilityTracker::cycle_visibility ()
{
if (window.is_mapped() && (_visibility == GDK_VISIBILITY_UNOBSCURED)) {
window.hide ();
} else {
window.present ();
}
}

1
libs/gtkmm2ext/wscript
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@ -61,6 +61,7 @@ gtkmm2ext_sources = [
'treeutils.cc',
'utils.cc',
'version.cc',
'visibility_tracker.cc',
'window_title.cc'
]