/* | |
* Copyright (C) 2008 Apple Inc. All Rights Reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions | |
* are met: | |
* 1. Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright | |
* notice, this list of conditions and the following disclaimer in the | |
* documentation and/or other materials provided with the distribution. | |
* | |
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR | |
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
*/ | |
#ifndef ScrollbarTheme_h | |
#define ScrollbarTheme_h | |
#include "GraphicsContext.h" | |
#include "IntRect.h" | |
#include "ScrollTypes.h" | |
namespace WebCore { | |
class PlatformMouseEvent; | |
class Scrollbar; | |
class ScrollView; | |
class ScrollbarTheme : public Noncopyable { | |
public: | |
virtual ~ScrollbarTheme() {}; | |
virtual bool paint(Scrollbar*, GraphicsContext*, const IntRect& /*damageRect*/) { return false; } | |
virtual ScrollbarPart hitTest(Scrollbar*, const PlatformMouseEvent&) { return NoPart; } | |
virtual int scrollbarThickness(ScrollbarControlSize = RegularScrollbar) { return 0; } | |
virtual ScrollbarButtonsPlacement buttonsPlacement() const { return ScrollbarButtonsSingle; } | |
virtual bool supportsControlTints() const { return false; } | |
virtual void themeChanged() {} | |
virtual bool invalidateOnMouseEnterExit() { return false; } | |
void invalidateParts(Scrollbar* scrollbar, ScrollbarControlPartMask mask) | |
{ | |
if (mask & BackButtonStartPart) | |
invalidatePart(scrollbar, BackButtonStartPart); | |
if (mask & ForwardButtonStartPart) | |
invalidatePart(scrollbar, ForwardButtonStartPart); | |
if (mask & BackTrackPart) | |
invalidatePart(scrollbar, BackTrackPart); | |
if (mask & ThumbPart) | |
invalidatePart(scrollbar, ThumbPart); | |
if (mask & ForwardTrackPart) | |
invalidatePart(scrollbar, ForwardTrackPart); | |
if (mask & BackButtonEndPart) | |
invalidatePart(scrollbar, BackButtonEndPart); | |
if (mask & ForwardButtonEndPart) | |
invalidatePart(scrollbar, ForwardButtonEndPart); | |
} | |
virtual void invalidatePart(Scrollbar*, ScrollbarPart) {} | |
virtual void paintScrollCorner(ScrollView*, GraphicsContext* context, const IntRect& cornerRect) { context->fillRect(cornerRect, Color::white, DeviceColorSpace); } | |
virtual bool shouldCenterOnThumb(Scrollbar*, const PlatformMouseEvent&) { return false; } | |
virtual bool shouldSnapBackToDragOrigin(Scrollbar*, const PlatformMouseEvent&) { return false; } | |
virtual int thumbPosition(Scrollbar*) { return 0; } // The position of the thumb relative to the track. | |
virtual int thumbLength(Scrollbar*) { return 0; } // The length of the thumb along the axis of the scrollbar. | |
virtual int trackPosition(Scrollbar*) { return 0; } // The position of the track relative to the scrollbar. | |
virtual int trackLength(Scrollbar*) { return 0; } // The length of the track along the axis of the scrollbar. | |
virtual int maxOverlapBetweenPages() { return std::numeric_limits<int>::max(); } | |
virtual double initialAutoscrollTimerDelay() { return 0.25; } | |
virtual double autoscrollTimerDelay() { return 0.05; } | |
virtual void registerScrollbar(Scrollbar*) {} | |
virtual void unregisterScrollbar(Scrollbar*) {} | |
static ScrollbarTheme* nativeTheme(); // Must be implemented to return the correct theme subclass. | |
}; | |
} | |
#endif |