webkit/child/fling_animator_impl_android.h

   1 // Copyright (c) 2012 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 WEBKIT_CHILD_FLING_ANIMATOR_IMPL_ANDROID_H_
   6 #define WEBKIT_CHILD_FLING_ANIMATOR_IMPL_ANDROID_H_
   7
   8 #include "base/android/scoped_java_ref.h"
   9 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
  10 #include "third_party/WebKit/public/platform/WebGestureCurve.h"
  11 #include "third_party/WebKit/public/platform/WebSize.h"
  12 #include "ui/gfx/point.h"
  13 #include "ui/gfx/point_f.h"
  14 #include "webkit/child/webkit_child_export.h"
  15
  16 namespace blink {
  17 class WebGestureCurveTarget;
  18 }
  19
  20 namespace webkit_glue {
  21
  22 class WEBKIT_CHILD_EXPORT FlingAnimatorImpl : public blink::WebGestureCurve {
  23  public:
  24   FlingAnimatorImpl();
  25   virtual ~FlingAnimatorImpl();
  26
  27   static FlingAnimatorImpl* CreateAndroidGestureCurve(
  28       const blink::WebFloatPoint& velocity,
  29       const blink::WebSize&);
  30
  31   virtual bool apply(double time,
  32                      blink::WebGestureCurveTarget* target);
  33
  34   static bool RegisterJni(JNIEnv*);
  35
  36  private:
  37   void StartFling(const gfx::PointF& velocity);
  38   // Returns true if the animation is not yet finished.
  39   bool UpdatePosition();
  40   gfx::Point GetCurrentPosition();
  41   float GetCurrentVelocity();
  42   virtual void CancelFling();
  43
  44   bool is_active_;
  45
  46   // Java OverScroller instance and methods.
  47   base::android::ScopedJavaGlobalRef<jobject> java_scroller_;
  48
  49   gfx::Point last_position_;
  50   gfx::PointF last_velocity_;
  51   double last_time_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(FlingAnimatorImpl);
  54 };
  55
  56 } // namespace webkit_glue
  57
  58 #endif // WEBKIT_CHILD_FLING_ANIMATOR_IMPL_ANDROID_H_