/usr/include/mirserver/mir/scene/observer.h is in libmirserver-dev 0.26.3+16.04.20170605-0ubuntu1.1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | /*
* Copyright © 2014 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3,
* as published by the Free Software Foundation.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* Authored by: Robert Carr <robert.carr@canonical.com>
*/
#ifndef MIR_SCENE_OBSERVER_H_
#define MIR_SCENE_OBSERVER_H_
#include <memory>
namespace mir
{
namespace scene
{
class Surface;
/// An observer for top level notifications of scene changes. In order
/// to receive more granular change notifications a user may install
/// mir::scene::SurfaceObserver in surface_added.
class Observer
{
public:
virtual void surface_added(Surface* surface) = 0;
virtual void surface_removed(Surface* surface) = 0;
virtual void surfaces_reordered() = 0;
// Used to indicate the scene has changed in some way beyond the present surfaces
// and will require full recomposition.
virtual void scene_changed() = 0;
// Called at observer registration to notify of already existing surfaces.
virtual void surface_exists(Surface* surface) = 0;
// Called when observer is unregistered, for example, to provide a place to
// unregister SurfaceObservers which may have been added in surface_added/exists
virtual void end_observation() = 0;
protected:
Observer() = default;
virtual ~Observer() = default;
Observer(Observer const&) = delete;
Observer& operator=(Observer const&) = delete;
};
}
} // namespace mir
#endif // MIR_SCENE_OBSERVER_H_
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