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 // All callbacks invoked from the compositor thread.
  18 class InputHandlerProxyClient {
  19  public:
  20   // Called just before the InputHandlerProxy shuts down.
  21   virtual void WillShutdown() = 0;
  22
  23   // Transfers an active wheel fling animation initiated by a previously
  24   // handled input event out to the client.
  25   virtual void TransferActiveWheelFlingAnimation(
  26       const blink::WebActiveWheelFlingParameters& params) = 0;
  27
  28   // Creates a new fling animation curve instance for device |device_source|
  29   // with |velocity| and already scrolled |cumulative_scroll| pixels.
  30   virtual blink::WebGestureCurve* CreateFlingAnimationCurve(
  31       int device_source,
  32       const blink::WebFloatPoint& velocity,
  33       const blink::WebSize& cumulative_scroll) = 0;
  34
  35   virtual void DidOverscroll(const cc::DidOverscrollParams& params) = 0;
  36
  37  protected:
  38   virtual ~InputHandlerProxyClient() {}
  39 };
  40
  41 }  // namespace content
  42
  43 #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_PROXY_CLIENT_H_