ScrollbarThemeQStyle.cpp [plain text]
#include "config.h"
#include "ScrollbarThemeQStyle.h"
#include "GraphicsContext.h"
#include "PlatformMouseEvent.h"
#include "RenderThemeQStyle.h"
#include "RenderThemeQtMobile.h"
#include "ScrollView.h"
#include "Scrollbar.h"
#include <QApplication>
#ifdef Q_WS_MAC
#include <QMacStyle>
#endif
#include <QMenu>
#include <QPainter>
#include <QStyle>
#include <QStyleOptionSlider>
namespace WebCore {
ScrollbarThemeQStyle::~ScrollbarThemeQStyle()
{
}
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(ScrollbarThemeClient* 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;
else
opt.state &= ~QStyle::State_Horizontal;
opt.sliderValue = scrollbar->value();
opt.sliderPosition = opt.sliderValue;
opt.pageStep = scrollbar->pageStep();
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 ScrollbarThemeQStyle::paint(ScrollbarThemeClient* scrollbar, GraphicsContext* graphicsContext, const IntRect& dirtyRect)
{
if (graphicsContext->updatingControlTints()) {
scrollbar->invalidateRect(dirtyRect);
return false;
}
StylePainterQStyle p(this, graphicsContext);
if (!p.isValid())
return true;
p.painter->save();
QStyleOptionSlider* opt = styleOptionSlider(scrollbar, p.widget);
p.painter->setClipRect(opt->rect.intersected(dirtyRect), Qt::IntersectClip);
#ifdef Q_WS_MAC
if (qobject_cast<QMacStyle*>(style()))
p.drawComplexControl(QStyle::CC_ScrollBar, *opt);
else
#endif
{
p.painter->fillRect(opt->rect, opt->palette.background());
const QPoint topLeft = opt->rect.topLeft();
p.painter->translate(topLeft);
opt->rect.moveTo(QPoint(0, 0));
p.drawComplexControl(QStyle::CC_ScrollBar, *opt);
opt->rect.moveTo(topLeft);
}
p.painter->restore();
return true;
}
ScrollbarPart ScrollbarThemeQStyle::hitTest(ScrollbarThemeClient* scrollbar, const PlatformMouseEvent& evt)
{
QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
const QPoint pos = scrollbar->convertFromContainingWindow(evt.position());
opt->rect.moveTo(QPoint(0, 0));
QStyle::SubControl sc = style()->hitTestComplexControl(QStyle::CC_ScrollBar, opt, pos, 0);
return scrollbarPart(sc);
}
bool ScrollbarThemeQStyle::shouldCenterOnThumb(ScrollbarThemeClient*, const PlatformMouseEvent& evt)
{
return style()->styleHint(QStyle::SH_ScrollBar_MiddleClickAbsolutePosition) && evt.button() == MiddleButton;
}
void ScrollbarThemeQStyle::invalidatePart(ScrollbarThemeClient* scrollbar, ScrollbarPart)
{
scrollbar->invalidate();
}
int ScrollbarThemeQStyle::scrollbarThickness(ScrollbarControlSize controlSize)
{
QStyleOptionSlider o;
o.orientation = Qt::Vertical;
o.state &= ~QStyle::State_Horizontal;
if (controlSize != RegularScrollbar)
o.state |= QStyle::State_Mini;
return style()->pixelMetric(QStyle::PM_ScrollBarExtent, &o, 0);
}
int ScrollbarThemeQStyle::thumbPosition(ScrollbarThemeClient* scrollbar)
{
if (scrollbar->enabled()) {
float pos = (float)scrollbar->currentPos() * (trackLength(scrollbar) - thumbLength(scrollbar)) / scrollbar->maximum();
return (pos < 1 && pos > 0) ? 1 : pos;
}
return 0;
}
int ScrollbarThemeQStyle::thumbLength(ScrollbarThemeClient* scrollbar)
{
QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
IntRect thumb = style()->subControlRect(QStyle::CC_ScrollBar, opt, QStyle::SC_ScrollBarSlider, 0);
return scrollbar->orientation() == HorizontalScrollbar ? thumb.width() : thumb.height();
}
int ScrollbarThemeQStyle::trackPosition(ScrollbarThemeClient* scrollbar)
{
QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
IntRect track = style()->subControlRect(QStyle::CC_ScrollBar, opt, QStyle::SC_ScrollBarGroove, 0);
return scrollbar->orientation() == HorizontalScrollbar ? track.x() - scrollbar->x() : track.y() - scrollbar->y();
}
int ScrollbarThemeQStyle::trackLength(ScrollbarThemeClient* scrollbar)
{
QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
IntRect track = style()->subControlRect(QStyle::CC_ScrollBar, opt, QStyle::SC_ScrollBarGroove, 0);
return scrollbar->orientation() == HorizontalScrollbar ? track.width() : track.height();
}
void ScrollbarThemeQStyle::paintScrollCorner(ScrollView*, GraphicsContext* context, const IntRect& rect)
{
StylePainterQStyle p(this, context);
if (!p.isValid())
return;
QStyleOption option;
option.rect = rect;
p.drawPrimitive(QStyle::PE_PanelScrollAreaCorner, option);
}
QStyle* ScrollbarThemeQStyle::style() const
{
return QApplication::style();
}
}