cc/animation/scroll_offset_animation_curve.h

   1 // Copyright 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 CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_
   6 #define CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/time/time.h"
  10 #include "cc/animation/animation_curve.h"
  11 #include "cc/base/cc_export.h"
  12
  13 namespace cc {
  14
  15 class TimingFunction;
  16
  17 class CC_EXPORT ScrollOffsetAnimationCurve : public AnimationCurve {
  18  public:
  19   static scoped_ptr<ScrollOffsetAnimationCurve> Create(
  20       const gfx::Vector2dF& target_value,
  21       scoped_ptr<TimingFunction> timing_function);
  22
  23   virtual ~ScrollOffsetAnimationCurve();
  24
  25   void SetInitialValue(const gfx::Vector2dF& initial_value);
  26   gfx::Vector2dF GetValue(double t) const;
  27
  28   // AnimationCurve implementation
  29   virtual double Duration() const OVERRIDE;
  30   virtual CurveType Type() const OVERRIDE;
  31   virtual scoped_ptr<AnimationCurve> Clone() const OVERRIDE;
  32
  33  private:
  34   ScrollOffsetAnimationCurve(const gfx::Vector2dF& target_value,
  35                              scoped_ptr <TimingFunction> timing_function);
  36
  37   gfx::Vector2dF initial_value_;
  38   gfx::Vector2dF target_value_;
  39   base::TimeDelta duration_;
  40
  41   scoped_ptr<TimingFunction> timing_function_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(ScrollOffsetAnimationCurve);
  44 };
  45
  46 }  // namespace cc
  47
  48 #endif  // CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_