ui/chromeos/network/network_icon_animation.h

   1 // Copyright (c) 2013 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 UI_CHROMEOS_NETWORK_NETWORK_ICON_ANIMATION_H_
   6 #define UI_CHROMEOS_NETWORK_NETWORK_ICON_ANIMATION_H_
   7
   8 #include <set>
   9 #include <string>
  10
  11 #include "base/observer_list.h"
  12 #include "ui/chromeos/ui_chromeos_export.h"
  13 #include "ui/gfx/animation/animation_delegate.h"
  14 #include "ui/gfx/animation/throb_animation.h"
  15
  16 namespace ui {
  17 namespace network_icon {
  18
  19 class AnimationObserver;
  20
  21 // Single instance class to handle icon animations and keep them in sync.
  22 class UI_CHROMEOS_EXPORT NetworkIconAnimation : public gfx::AnimationDelegate {
  23  public:
  24   NetworkIconAnimation();
  25   ~NetworkIconAnimation() override;
  26
  27   // Returns the current animation value, [0-1].
  28   double GetAnimation();
  29
  30   // The animation stops when all observers have been removed.
  31   // Be sure to remove observers when no associated icons are animating.
  32   void AddObserver(AnimationObserver* observer);
  33   void RemoveObserver(AnimationObserver* observer);
  34
  35   // gfx::AnimationDelegate implementation.
  36   void AnimationProgressed(const gfx::Animation* animation) override;
  37
  38   static NetworkIconAnimation* GetInstance();
  39
  40  private:
  41   gfx::ThrobAnimation animation_;
  42   base::ObserverList<AnimationObserver> observers_;
  43 };
  44
  45 }  // namespace network_icon
  46 }  // namespace ui
  47
  48 #endif  // UI_CHROMEOS_NETWORK_NETWORK_ICON_ANIMATION_H_