content/renderer/input/input_handler_proxy_client.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 CONTENT_RENDERER_INPUT_INPUT_HANDLER_PROXY_CLIENT_H_
   6 #define CONTENT_RENDERER_INPUT_INPUT_HANDLER_PROXY_CLIENT_H_
   7
   8 namespace blink {
   9 class WebGestureCurve;
  10 struct WebActiveWheelFlingParameters;
  11 struct WebFloatPoint;
  12 struct WebSize;
  13 }
  14
  15 namespace content {
  16
  17 struct DidOverscrollParams;
  18
  19 // All callbacks invoked from the compositor thread.
  20 class InputHandlerProxyClient {
  21  public:
  22   // Called just before the InputHandlerProxy shuts down.
  23   virtual void WillShutdown() = 0;
  24
  25   // Transfers an active wheel fling animation initiated by a previously
  26   // handled input event out to the client.
  27   virtual void TransferActiveWheelFlingAnimation(
  28       const blink::WebActiveWheelFlingParameters& params) = 0;
  29
  30   // Creates a new fling animation curve instance for device |device_source|
  31   // with |velocity| and already scrolled |cumulative_scroll| pixels.
  32   virtual blink::WebGestureCurve* CreateFlingAnimationCurve(
  33       blink::WebGestureDevice device_source,
  34       const blink::WebFloatPoint& velocity,
  35       const blink::WebSize& cumulative_scroll) = 0;
  36
  37   virtual void DidOverscroll(const DidOverscrollParams& params) = 0;
  38
  39   virtual void DidStopFlinging() = 0;
  40
  41   virtual void DidAnimateForInput() = 0;
  42
  43  protected:
  44   virtual ~InputHandlerProxyClient() {}
  45 };
  46
  47 }  // namespace content
  48
  49 #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_PROXY_CLIENT_H_