Block keyboard and mouse input when maximize mode is activated by accelerometer.

ash/wm/maximize_mode/maximize_mode_event_blocker.h

+// 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 ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_EVENT_BLOCKER_H_
+#define ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_EVENT_BLOCKER_H_
+
+#include "ash/shell_observer.h"
+#include "base/macros.h"
+#include "base/memory/scoped_vector.h"
+#include "ui/aura/scoped_window_targeter.h"
+
+namespace aura {
+class Window;
+}  // namespace aura
+
+namespace ash {
+
+// A class which blocks mouse and keyboard events while instantiated by
+// replacing the root window event targeter.
+class MaximizeModeEventBlocker : public ShellObserver {
+ public:
+  MaximizeModeEventBlocker();
+  virtual ~MaximizeModeEventBlocker();
+
+  // ShellObserver:
+  virtual void OnRootWindowAdded(aura::Window* root_window) OVERRIDE;
+
+ private:
+  // Adds an event targeter on |root_window| to block mouse and keyboard events.
+  void AddEventTargeterOn(aura::Window* root_window);
+
+  ScopedVector<aura::ScopedWindowTargeter> targeters_;
+
+  DISALLOW_COPY_AND_ASSIGN(MaximizeModeEventBlocker);
+};
+
+}  // namespace ash
+
+#endif  // ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_EVENT_BLOCKER_H_