#ifndef ScrollAnimator_h
#define ScrollAnimator_h
#include "FloatSize.h"
#include "PlatformWheelEvent.h"
#include "ScrollTypes.h"
#include <wtf/FastMalloc.h>
#include <wtf/Forward.h>
namespace WebCore {
class FloatPoint;
class PlatformTouchEvent;
class ScrollableArea;
class Scrollbar;
class ScrollAnimator {
WTF_MAKE_FAST_ALLOCATED;
public:
static PassOwnPtr<ScrollAnimator> create(ScrollableArea*);
virtual ~ScrollAnimator();
virtual bool scroll(ScrollbarOrientation, ScrollGranularity, float step, float multiplier);
virtual void scrollToOffsetWithoutAnimation(const FloatPoint&);
ScrollableArea* scrollableArea() const { return m_scrollableArea; }
virtual bool handleWheelEvent(const PlatformWheelEvent&);
#if ENABLE(TOUCH_EVENTS)
virtual bool handleTouchEvent(const PlatformTouchEvent&);
#endif
#if PLATFORM(COCOA)
virtual void handleWheelEventPhase(PlatformWheelEventPhase) { }
#endif
void setCurrentPosition(const FloatPoint&);
FloatPoint currentPosition() const;
virtual void cancelAnimations() { }
virtual void serviceScrollAnimations() { }
virtual void contentAreaWillPaint() const { }
virtual void mouseEnteredContentArea() const { }
virtual void mouseExitedContentArea() const { }
virtual void mouseMovedInContentArea() const { }
virtual void mouseEnteredScrollbar(Scrollbar*) const { }
virtual void mouseExitedScrollbar(Scrollbar*) const { }
virtual void willStartLiveResize() { }
virtual void contentsResized() const { }
virtual void willEndLiveResize() { }
virtual void contentAreaDidShow() const { }
virtual void contentAreaDidHide() const { }
virtual void lockOverlayScrollbarStateToHidden(bool) { }
virtual bool scrollbarsCanBeActive() const { return true; }
virtual void didAddVerticalScrollbar(Scrollbar*) { }
virtual void willRemoveVerticalScrollbar(Scrollbar*) { }
virtual void didAddHorizontalScrollbar(Scrollbar*) { }
virtual void willRemoveHorizontalScrollbar(Scrollbar*) { }
virtual void verticalScrollbarLayerDidChange() { }
virtual void horizontalScrollbarLayerDidChange() { }
virtual bool shouldScrollbarParticipateInHitTesting(Scrollbar*) { return true; }
virtual void notifyContentAreaScrolled(const FloatSize& delta) { UNUSED_PARAM(delta); }
virtual bool isRubberBandInProgress() const { return false; }
protected:
explicit ScrollAnimator(ScrollableArea*);
virtual void notifyPositionChanged(const FloatSize& delta);
ScrollableArea* m_scrollableArea;
float m_currentPosX; float m_currentPosY; };
}
#endif // ScrollAnimator_h