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       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
       5             :  * You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #ifndef mozilla_dom_WheelEvent_h_
       8             : #define mozilla_dom_WheelEvent_h_
       9             : 
      10             : #include "mozilla/dom/MouseEvent.h"
      11             : #include "mozilla/dom/WheelEventBinding.h"
      12             : #include "mozilla/EventForwards.h"
      13             : 
      14             : namespace mozilla {
      15             : namespace dom {
      16             : 
      17             : class WheelEvent : public MouseEvent
      18             : {
      19             : public:
      20             :   WheelEvent(EventTarget* aOwner,
      21             :              nsPresContext* aPresContext,
      22             :              WidgetWheelEvent* aWheelEvent);
      23             : 
      24             :   NS_DECL_ISUPPORTS_INHERITED
      25             : 
      26             :   // Forward to base class
      27           0 :   NS_FORWARD_TO_MOUSEEVENT
      28             : 
      29             :   static
      30             :   already_AddRefed<WheelEvent> Constructor(const GlobalObject& aGlobal,
      31             :                                            const nsAString& aType,
      32             :                                            const WheelEventInit& aParam,
      33             :                                            ErrorResult& aRv);
      34             : 
      35           0 :   virtual JSObject* WrapObjectInternal(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override
      36             :   {
      37           0 :     return WheelEventBinding::Wrap(aCx, this, aGivenProto);
      38             :   }
      39             : 
      40             :   // NOTE: DeltaX(), DeltaY() and DeltaZ() return CSS pixels when deltaMode is
      41             :   //       DOM_DELTA_PIXEL. (The internal event's delta values are device pixels
      42             :   //       if it's dispatched by widget)
      43             :   double DeltaX();
      44             :   double DeltaY();
      45             :   double DeltaZ();
      46             :   uint32_t DeltaMode();
      47             : 
      48             :   void
      49             :   InitWheelEvent(const nsAString& aType, bool aCanBubble, bool aCancelable,
      50             :                  nsGlobalWindow* aView, int32_t aDetail,
      51             :                  int32_t aScreenX, int32_t aScreenY,
      52             :                  int32_t aClientX, int32_t aClientY, uint16_t aButton,
      53             :                  EventTarget* aRelatedTarget, const nsAString& aModifiersList,
      54             :                  double aDeltaX, double aDeltaY, double aDeltaZ,
      55             :                  uint32_t aDeltaMode);
      56             : 
      57             : protected:
      58           0 :   ~WheelEvent() {}
      59             : 
      60             : private:
      61             :   int32_t mAppUnitsPerDevPixel;
      62             : };
      63             : 
      64             : } // namespace dom
      65             : } // namespace mozilla
      66             : 
      67             : already_AddRefed<mozilla::dom::WheelEvent>
      68             : NS_NewDOMWheelEvent(mozilla::dom::EventTarget* aOwner,
      69             :                     nsPresContext* aPresContext,
      70             :                     mozilla::WidgetWheelEvent* aEvent);
      71             : 
      72             : #endif // mozilla_dom_WheelEvent_h_