content/browser/renderer_host/input/synthetic_gesture_target_aura.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_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_TARGET_AURA_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_TARGET_AURA_H_
   7
   8 #include "base/time/time.h"
   9 #include "content/browser/renderer_host/input/synthetic_gesture_target_base.h"
  10 #include "content/common/input/synthetic_gesture_params.h"
  11
  12 namespace aura {
  13 class Window;
  14 class WindowEventDispatcher;
  15
  16 namespace client {
  17 class ScreenPositionClient;
  18 }
  19 }  // namespace aura
  20
  21 namespace content {
  22
  23 // SyntheticGestureTarget implementation for aura
  24 class SyntheticGestureTargetAura : public SyntheticGestureTargetBase {
  25  public:
  26   explicit SyntheticGestureTargetAura(RenderWidgetHostImpl* host);
  27
  28   // SyntheticGestureTargetBase:
  29   void DispatchWebTouchEventToPlatform(
  30       const blink::WebTouchEvent& web_touch,
  31       const ui::LatencyInfo& latency_info) override;
  32   void DispatchWebMouseWheelEventToPlatform(
  33       const blink::WebMouseWheelEvent& web_wheel,
  34       const ui::LatencyInfo& latency_info) override;
  35   void DispatchWebMouseEventToPlatform(
  36       const blink::WebMouseEvent& web_mouse,
  37       const ui::LatencyInfo& latency_info) override;
  38
  39   // SyntheticGestureTarget:
  40   SyntheticGestureParams::GestureSourceType
  41   GetDefaultSyntheticGestureSourceType() const override;
  42
  43   float GetTouchSlopInDips() const override;
  44
  45   float GetMinScalingSpanInDips() const override;
  46
  47  private:
  48   aura::Window* GetWindow() const;
  49
  50   // Synthetic located event's location and touch event's radius are in DIP and
  51   // aura event dispatcher assumes input event is in device pixel and will apply
  52   // device scale factor to convert the input to DIP. So we need to use
  53   // device_scale_factor to convert the input event from DIP to device pixel
  54   // before dispatching it into platform.
  55   float device_scale_factor_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(SyntheticGestureTargetAura);
  58 };
  59
  60 }  // namespace content
  61
  62 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_GESTURE_TARGET_AURA_H_