PlatformScrollBar.h [plain text]
#ifndef PlatformScrollbar_h
#define PlatformScrollbar_h
#include "Widget.h"
#include "ScrollBar.h"
#include "Timer.h"
typedef struct HDC__* HDC;
namespace WebCore {
enum ScrollbarPart { NoPart, BackButtonPart, BackTrackPart, ThumbPart, ForwardTrackPart, ForwardButtonPart };
class PlatformScrollbar : public Widget, public Scrollbar {
public:
PlatformScrollbar(ScrollbarClient*, ScrollbarOrientation, ScrollbarControlSize);
virtual ~PlatformScrollbar();
virtual bool isWidget() const { return true; }
virtual void setParent(ScrollView*);
virtual int width() const;
virtual int height() const;
virtual void setRect(const IntRect&);
virtual void setEnabled(bool);
virtual void paint(GraphicsContext*, const IntRect& damageRect);
virtual bool handleMouseMoveEvent(const PlatformMouseEvent&);
virtual bool handleMouseOutEvent(const PlatformMouseEvent&);
virtual bool handleMousePressEvent(const PlatformMouseEvent&);
virtual bool handleMouseReleaseEvent(const PlatformMouseEvent&);
virtual IntRect windowClipRect() const;
static void themeChanged();
static int horizontalScrollbarHeight(ScrollbarControlSize size = RegularScrollbar);
static int verticalScrollbarWidth(ScrollbarControlSize size = RegularScrollbar);
void autoscrollTimerFired(Timer<PlatformScrollbar>*);
protected:
virtual void updateThumbPosition();
virtual void updateThumbProportion();
private:
IntRect backButtonRect() const;
IntRect forwardButtonRect() const;
IntRect trackRect() const;
IntRect thumbRect() const;
IntRect gripperRect(const IntRect& thumbRect) const;
void splitTrack(const IntRect& trackRect, IntRect& beforeThumbRect, IntRect& thumbRect, IntRect& afterThumbRect) const;
int thumbPosition() const;
int thumbLength() const;
int trackLength() const;
void paintButton(GraphicsContext*, const IntRect& buttonRect, bool start, const IntRect& damageRect) const;
void paintTrack(GraphicsContext*, const IntRect& trackRect, bool start, const IntRect& damageRect) const;
void paintThumb(GraphicsContext*, const IntRect& thumbRect, const IntRect& damageRect) const;
void paintGripper(HDC, const IntRect& gripperRect) const;
ScrollbarPart hitTest(const PlatformMouseEvent&);
void startTimerIfNeeded(double delay);
void stopTimerIfNeeded();
void autoscrollPressedPart(double delay);
ScrollDirection pressedPartScrollDirection();
ScrollGranularity pressedPartScrollGranularity();
bool thumbUnderMouse();
void invalidatePart(ScrollbarPart);
void invalidateTrack();
ScrollbarPart m_hoveredPart;
ScrollbarPart m_pressedPart;
int m_pressedPos;
Timer<PlatformScrollbar> m_scrollTimer;
bool m_overlapsResizer;
};
}
#endif // PlatformScrollbar_h