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Viewing changes to include/server/mir/scene/legacy_scene_change_notification.h

  • Committer: Package Import Robot
  • Author(s): Ubuntu daily release
  • Date: 2014-10-10 14:01:26 UTC
  • mto: This revision was merged to the branch mainline in revision 84.
  • Revision ID: package-import@ubuntu.com-20141010140126-n1czko8na1kuz4ll
Tags: upstream-0.8.0+14.10.20141010
Import upstream version 0.8.0+14.10.20141010

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include/server/mir/scene/legacy_scene_change_notification.h
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/*
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 * Copyright © 2014 Canonical Ltd.
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 *
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 * This program is free software: you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 3,
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 * as published by the Free Software Foundation.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
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 *
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 * Authored by: Robert Carr <robert.carr@canonical.com>
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 */
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#ifndef MIR_SCENE_SIMPLE_OBSERVER_H_
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#define MIR_SCENE_SIMPLE_OBSERVER_H_
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#include "mir/scene/observer.h"
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#include <functional>
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#include <map>
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#include <mutex>
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namespace mir
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{
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namespace scene
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{
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class SurfaceObserver;
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// A simple implementation of surface observer which forwards all changes to a provided callback.
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// Also installs surface observers on each added surface which in turn forward each change to 
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// said callback.
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class LegacySceneChangeNotification : public Observer
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{
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public:
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    LegacySceneChangeNotification(
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        std::function<void()> const& scene_notify_change,
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        std::function<void(int)> const& buffer_notify_change);
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    ~LegacySceneChangeNotification();
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    void surface_added(Surface* surface) override;
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    void surface_removed(Surface* surface) override;
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    void surfaces_reordered() override;
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    void surface_exists(Surface* surface) override;
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    void end_observation() override;
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private:
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    std::function<void()> const scene_notify_change;
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    std::function<void(int)> const buffer_notify_change;
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    std::mutex surface_observers_guard;
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    std::map<Surface*, std::weak_ptr<SurfaceObserver>> surface_observers;
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    void add_surface_observer(Surface* surface);
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};
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}
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} // namespace mir
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#endif // MIR_SCENE_SIMPLE_OBSERVER_H_