chrome/browser/ui/webui/chromeos/touch_view_controller_delegate.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_UI_WEBUI_CHROMEOS_TOUCH_VIEW_CONTROLLER_DELEGATE_H_
   6 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_TOUCH_VIEW_CONTROLLER_DELEGATE_H_
   7
   8 #include "ash/shell_observer.h"
   9 #include "base/observer_list.h"
  10
  11 namespace chromeos {
  12
  13 // An interface for ash::MaximizeModeController.
  14 class TouchViewControllerDelegate : public ash::ShellObserver {
  15  public:
  16   // Observer that reports changes to the state of MaximizeModeController's
  17   // rotation lock.
  18   class Observer {
  19    public:
  20     // Invoked when maximize mode started/ended.
  21     virtual void OnMaximizeModeStarted() {}
  22     virtual void OnMaximizeModeEnded() {}
  23
  24    protected:
  25     virtual ~Observer() {}
  26   };
  27
  28   TouchViewControllerDelegate();
  29   ~TouchViewControllerDelegate() override;
  30
  31   // Add/Remove observers.
  32   void AddObserver(Observer* observer);
  33   void RemoveObserver(Observer* observer);
  34
  35   // Test if the Maximize Mode is enabled or not.
  36   bool IsMaximizeModeEnabled() const;
  37
  38
  39  private:
  40   // ash::ShellObserver implementation:
  41   void OnMaximizeModeStarted() override;
  42   void OnMaximizeModeEnded() override;
  43
  44   // Mode state change observers.
  45   base::ObserverList<Observer> observers_;
  46
  47   DISALLOW_COPY_AND_ASSIGN(TouchViewControllerDelegate);
  48 };
  49
  50 }  // namespace chromeos
  51
  52 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_TOUCH_VIEW_CONTROLLER_DELEGATE_H_