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* Copyright © 2014 Canonical Ltd.
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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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* 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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* 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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* Authored by: Robert Carr <robert.carr@canonical.com>
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#ifndef MIR_SCENE_NULL_OBSERVER_H_
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#define MIR_SCENE_NULL_OBSERVER_H_
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#include "mir/scene/observer.h"
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class NullObserver : public Observer
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NullObserver() = default;
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virtual ~NullObserver() = default;
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void surface_added(Surface* surface);
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void surface_removed(Surface* surface);
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void surfaces_reordered();
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// Called at observer registration to notify of already existing surfaces.
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void surface_exists(Surface* surface);
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// Called when observer is unregistered, for example, to provide a place to
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// unregister SurfaceObservers which may have been added in surface_added/exists
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void end_observation();
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NullObserver(NullObserver const&) = delete;
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NullObserver& operator=(NullObserver const&) = delete;
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#endif // MIR_SCENE_NULL_OBSERVER_H_