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/*
* Copyright (C) 2007, 2008 Apple Inc. All Rights Reserved.
* Copyright (C) 2007 Staikos Computing Services Inc. <info@staikos.net>
* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
*
* 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.
*/
#include "config.h"
#include "ScrollbarThemeQt.h"
#include "GraphicsContext.h"
#include "PlatformMouseEvent.h"
#include "RenderThemeQt.h"
#include "Scrollbar.h"
#include "ScrollView.h"
#include <QApplication>
#include <QDebug>
#include <QPainter>
#include <QStyle>
#include <QStyleOptionSlider>
#include <QMenu>
namespace WebCore {
ScrollbarTheme* ScrollbarTheme::nativeTheme()
{
static ScrollbarThemeQt theme;
return &theme;
}
ScrollbarThemeQt::~ScrollbarThemeQt()
{
}
static QStyle::SubControl scPart(const ScrollbarPart& part)
{
switch (part) {
case NoPart:
return QStyle::SC_None;
case BackButtonStartPart:
case BackButtonEndPart:
return QStyle::SC_ScrollBarSubLine;
case BackTrackPart:
return QStyle::SC_ScrollBarSubPage;
case ThumbPart:
return QStyle::SC_ScrollBarSlider;
case ForwardTrackPart:
return QStyle::SC_ScrollBarAddPage;
case ForwardButtonStartPart:
case ForwardButtonEndPart:
return QStyle::SC_ScrollBarAddLine;
}
return QStyle::SC_None;
}
static ScrollbarPart scrollbarPart(const QStyle::SubControl& sc)
{
switch (sc) {
case QStyle::SC_None:
return NoPart;
case QStyle::SC_ScrollBarSubLine:
return BackButtonStartPart;
case QStyle::SC_ScrollBarSubPage:
return BackTrackPart;
case QStyle::SC_ScrollBarSlider:
return ThumbPart;
case QStyle::SC_ScrollBarAddPage:
return ForwardTrackPart;
case QStyle::SC_ScrollBarAddLine:
return ForwardButtonStartPart;
}
return NoPart;
}
static QStyleOptionSlider* styleOptionSlider(Scrollbar* scrollbar, QWidget* widget = 0)
{
static QStyleOptionSlider opt;
if (widget)
opt.initFrom(widget);
else
opt.state |= QStyle::State_Active;
opt.state &= ~QStyle::State_HasFocus;
opt.rect = scrollbar->frameRect();
if (scrollbar->enabled())
opt.state |= QStyle::State_Enabled;
if (scrollbar->controlSize() != RegularScrollbar)
opt.state |= QStyle::State_Mini;
opt.orientation = (scrollbar->orientation() == VerticalScrollbar) ? Qt::Vertical : Qt::Horizontal;
if (scrollbar->orientation() == HorizontalScrollbar)
opt.state |= QStyle::State_Horizontal;
opt.sliderValue = scrollbar->value();
opt.sliderPosition = opt.sliderValue;
opt.pageStep = scrollbar->visibleSize();
opt.singleStep = scrollbar->lineStep();
opt.minimum = 0;
opt.maximum = qMax(0, scrollbar->maximum());
ScrollbarPart pressedPart = scrollbar->pressedPart();
ScrollbarPart hoveredPart = scrollbar->hoveredPart();
if (pressedPart != NoPart) {
opt.activeSubControls = scPart(scrollbar->pressedPart());
if (pressedPart == BackButtonStartPart || pressedPart == ForwardButtonStartPart ||
pressedPart == BackButtonEndPart || pressedPart == ForwardButtonEndPart ||
pressedPart == ThumbPart)
opt.state |= QStyle::State_Sunken;
} else
opt.activeSubControls = scPart(hoveredPart);
if (hoveredPart != NoPart)
opt.state |= QStyle::State_MouseOver;
return &opt;
}
bool ScrollbarThemeQt::paint(Scrollbar* scrollbar, GraphicsContext* graphicsContext, const IntRect& damageRect)
{
if (graphicsContext->updatingControlTints()) {
scrollbar->invalidateRect(damageRect);
return false;
}
StylePainter p(graphicsContext);
if (!p.isValid())
return true;
p.painter->save();
QStyleOptionSlider* opt = styleOptionSlider(scrollbar, p.widget);
p.painter->setClipRect(opt->rect.intersected(damageRect));
#ifdef Q_WS_MAC
p.drawComplexControl(QStyle::CC_ScrollBar, *opt);
#else
const QPoint topLeft = opt->rect.topLeft();
p.painter->translate(topLeft);
opt->rect.moveTo(QPoint(0, 0));
// The QStyle expects the background to be already filled
p.painter->fillRect(opt->rect, opt->palette.background());
p.drawComplexControl(QStyle::CC_ScrollBar, *opt);
opt->rect.moveTo(topLeft);
#endif
p.painter->restore();
return true;
}
ScrollbarPart ScrollbarThemeQt::hitTest(Scrollbar* scrollbar, const PlatformMouseEvent& evt)
{
QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
const QPoint pos = scrollbar->convertFromContainingWindow(evt.pos());
opt->rect.moveTo(QPoint(0, 0));
QStyle::SubControl sc = QApplication::style()->hitTestComplexControl(QStyle::CC_ScrollBar, opt, pos, 0);
return scrollbarPart(sc);
}
bool ScrollbarThemeQt::shouldCenterOnThumb(Scrollbar*, const PlatformMouseEvent& evt)
{
// Middle click centers slider thumb (if supported)
return QApplication::style()->styleHint(QStyle::SH_ScrollBar_MiddleClickAbsolutePosition) && evt.button() == MiddleButton;
}
void ScrollbarThemeQt::invalidatePart(Scrollbar* scrollbar, ScrollbarPart)
{
// FIXME: Do more precise invalidation.
scrollbar->invalidate();
}
int ScrollbarThemeQt::scrollbarThickness(ScrollbarControlSize controlSize)
{
QStyle* s = QApplication::style();
QStyleOptionSlider o;
o.orientation = Qt::Vertical;
o.state &= ~QStyle::State_Horizontal;
if (controlSize != RegularScrollbar)
o.state |= QStyle::State_Mini;
return s->pixelMetric(QStyle::PM_ScrollBarExtent, &o, 0);
}
int ScrollbarThemeQt::thumbPosition(Scrollbar* scrollbar)
{
if (scrollbar->enabled())
return (int)((float)scrollbar->currentPos() * (trackLength(scrollbar) - thumbLength(scrollbar)) / scrollbar->maximum());
return 0;
}
int ScrollbarThemeQt::thumbLength(Scrollbar* scrollbar)
{
QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
IntRect thumb = QApplication::style()->subControlRect(QStyle::CC_ScrollBar, opt, QStyle::SC_ScrollBarSlider, 0);
return scrollbar->orientation() == HorizontalScrollbar ? thumb.width() : thumb.height();
}
int ScrollbarThemeQt::trackPosition(Scrollbar* scrollbar)
{
QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
IntRect track = QApplication::style()->subControlRect(QStyle::CC_ScrollBar, opt, QStyle::SC_ScrollBarGroove, 0);
return scrollbar->orientation() == HorizontalScrollbar ? track.x() - scrollbar->x() : track.y() - scrollbar->y();
}
int ScrollbarThemeQt::trackLength(Scrollbar* scrollbar)
{
QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
IntRect track = QApplication::style()->subControlRect(QStyle::CC_ScrollBar, opt, QStyle::SC_ScrollBarGroove, 0);
return scrollbar->orientation() == HorizontalScrollbar ? track.width() : track.height();
}
void ScrollbarThemeQt::paintScrollCorner(ScrollView* scrollView, GraphicsContext* context, const IntRect& rect)
{
if (context->updatingControlTints()) {
scrollView->invalidateRect(rect);
return;
}
#if QT_VERSION < 0x040500
context->fillRect(rect, QApplication::palette().color(QPalette::Normal, QPalette::Window));
#else
StylePainter p(context);
if (!p.isValid())
return;
QStyleOption option;
option.rect = rect;
p.drawPrimitive(QStyle::PE_PanelScrollAreaCorner, option);
#endif
}
}