michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim: set ts=2 et sw=2 tw=80: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef mozilla_dom_WheelEvent_h_
michael@0: #define mozilla_dom_WheelEvent_h_
michael@0: 
michael@0: #include "nsIDOMWheelEvent.h"
michael@0: #include "mozilla/dom/MouseEvent.h"
michael@0: #include "mozilla/dom/WheelEventBinding.h"
michael@0: #include "mozilla/EventForwards.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: class WheelEvent : public MouseEvent,
michael@0:                    public nsIDOMWheelEvent
michael@0: {
michael@0: public:
michael@0:   WheelEvent(EventTarget* aOwner,
michael@0:              nsPresContext* aPresContext,
michael@0:              WidgetWheelEvent* aWheelEvent);
michael@0: 
michael@0:   NS_DECL_ISUPPORTS_INHERITED
michael@0: 
michael@0:   // nsIDOMWheelEvent Interface
michael@0:   NS_DECL_NSIDOMWHEELEVENT
michael@0:   
michael@0:   // Forward to base class
michael@0:   NS_FORWARD_TO_MOUSEEVENT
michael@0: 
michael@0:   static
michael@0:   already_AddRefed<WheelEvent> Constructor(const GlobalObject& aGlobal,
michael@0:                                            const nsAString& aType,
michael@0:                                            const WheelEventInit& aParam,
michael@0:                                            ErrorResult& aRv);
michael@0: 
michael@0:   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE
michael@0:   {
michael@0:     return WheelEventBinding::Wrap(aCx, this);
michael@0:   }
michael@0: 
michael@0:   // NOTE: DeltaX(), DeltaY() and DeltaZ() return CSS pixels when deltaMode is
michael@0:   //       DOM_DELTA_PIXEL. (The internal event's delta values are device pixels
michael@0:   //       if it's dispatched by widget)
michael@0:   double DeltaX();
michael@0:   double DeltaY();
michael@0:   double DeltaZ();
michael@0:   uint32_t DeltaMode();
michael@0: 
michael@0: private:
michael@0:   int32_t mAppUnitsPerDevPixel;
michael@0: };
michael@0: 
michael@0: } // namespace dom
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif // mozilla_dom_WheelEvent_h_