ui/compositor/layer_animator_collection.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 UI_COMPOSITOR_LAYER_ANIMATOR_COLLECTION_H_
   6 #define UI_COMPOSITOR_LAYER_ANIMATOR_COLLECTION_H_
   7
   8 #include <set>
   9
  10 #include "base/callback.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "base/time/time.h"
  13 #include "ui/compositor/compositor_export.h"
  14
  15 namespace base {
  16 class TimeTicks;
  17 }
  18
  19 namespace ui {
  20
  21 class LayerAnimator;
  22
  23 class COMPOSITOR_EXPORT LayerAnimatorCollectionDelegate {
  24  public:
  25   virtual ~LayerAnimatorCollectionDelegate() {}
  26
  27   virtual void ScheduleAnimationForLayerCollection() = 0;
  28 };
  29
  30 // A collection of LayerAnimators that should be updated at each animation step
  31 // in the compositor.
  32 class COMPOSITOR_EXPORT LayerAnimatorCollection {
  33  public:
  34   explicit LayerAnimatorCollection(LayerAnimatorCollectionDelegate* delegate);
  35   ~LayerAnimatorCollection();
  36
  37   void StartAnimator(scoped_refptr<LayerAnimator> animator);
  38   void StopAnimator(scoped_refptr<LayerAnimator> animator);
  39
  40   bool HasActiveAnimators() const;
  41
  42   void Progress(base::TimeTicks now);
  43
  44   base::TimeTicks last_tick_time() const { return last_tick_time_; }
  45
  46  private:
  47   LayerAnimatorCollectionDelegate* delegate_;
  48   base::TimeTicks last_tick_time_;
  49   std::set<scoped_refptr<LayerAnimator> > animators_;
  50
  51   DISALLOW_COPY_AND_ASSIGN(LayerAnimatorCollection);
  52 };
  53
  54 }  // namespace ui
  55
  56 #endif  // UI_COMPOSITOR_LAYER_ANIMATOR_COLLECTION_H_