ScrollbarThemeComposite.h [plain text]
#pragma once
#include "ScrollbarTheme.h"
#if PLATFORM(COCOA)
OBJC_CLASS NSScrollerImp;
#endif
namespace WebCore {
class ScrollbarThemeComposite : public ScrollbarTheme {
public:
bool paint(Scrollbar&, GraphicsContext&, const IntRect& damageRect) override;
ScrollbarPart hitTest(Scrollbar&, const IntPoint&) override;
void invalidatePart(Scrollbar&, ScrollbarPart) override;
int thumbPosition(Scrollbar&) override;
int thumbLength(Scrollbar&) override;
int trackPosition(Scrollbar&) override;
int trackLength(Scrollbar&) override;
void paintOverhangAreas(ScrollView&, GraphicsContext&, const IntRect& horizontalOverhangArea, const IntRect& verticalOverhangArea, const IntRect& dirtyRect) override;
virtual bool hasButtons(Scrollbar&) = 0;
virtual bool hasThumb(Scrollbar&) = 0;
virtual IntRect backButtonRect(Scrollbar&, ScrollbarPart, bool painting = false) = 0;
virtual IntRect forwardButtonRect(Scrollbar&, ScrollbarPart, bool painting = false) = 0;
virtual IntRect trackRect(Scrollbar&, bool painting = false) = 0;
virtual IntRect thumbRect(Scrollbar&);
virtual void splitTrack(Scrollbar&, const IntRect& track, IntRect& startTrack, IntRect& thumb, IntRect& endTrack);
virtual int minimumThumbLength(Scrollbar&);
virtual void willPaintScrollbar(GraphicsContext&, Scrollbar&) { }
virtual void didPaintScrollbar(GraphicsContext&, Scrollbar&) { }
virtual void paintScrollbarBackground(GraphicsContext&, Scrollbar&) { }
virtual void paintTrackBackground(GraphicsContext&, Scrollbar&, const IntRect&) { }
virtual void paintTrackPiece(GraphicsContext&, Scrollbar&, const IntRect&, ScrollbarPart) { }
virtual void paintButton(GraphicsContext&, Scrollbar&, const IntRect&, ScrollbarPart) { }
virtual void paintThumb(GraphicsContext&, Scrollbar&, const IntRect&) { }
virtual IntRect constrainTrackRectToTrackPieces(Scrollbar&, const IntRect& rect) { return rect; }
};
}