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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_AURA_SCOPED_WINDOW_TARGETER_H_
#define UI_AURA_SCOPED_WINDOW_TARGETER_H_
#include <memory>
#include "base/macros.h"
#include "ui/aura/window_observer.h"
namespace aura {
class Window;
class WindowTargeter;
// ScopedWindowTargeter is used to temporarily replace the event-targeter for a
// window. Upon construction, it installs a new targeter on the window, and upon
// destruction, it restores the previous event-targeter on the window.
class AURA_EXPORT ScopedWindowTargeter : public WindowObserver {
public:
ScopedWindowTargeter(Window* window,
std::unique_ptr<WindowTargeter> new_targeter);
~ScopedWindowTargeter() override;
WindowTargeter* old_targeter() { return old_targeter_.get(); }
private:
// WindowObserver:
void OnWindowDestroyed(Window* window) override;
Window* window_;
std::unique_ptr<WindowTargeter> old_targeter_;
DISALLOW_COPY_AND_ASSIGN(ScopedWindowTargeter);
};
} // namespace aura
#endif // UI_AURA_SCOPED_WINDOW_TARGETER_H_
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