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