qstylesheetstyle.cpp

奇趣公司比较新的qt/emd版本

    if (pal->selectionBackground.style() != Qt::NoBrush)
        p->setBrush(QPalette::Highlight, pal->selectionBackground);
    if (pal->selectionForeground.style() != Qt::NoBrush)
        p->setBrush(QPalette::HighlightedText, pal->selectionForeground);
    if (pal->alternateBackground.style() != Qt::NoBrush)
        p->setBrush(QPalette::AlternateBase, pal->alternateBackground);
}

void QRenderRule::configurePalette(QPalette *p, QPalette::ColorGroup cg, const QWidget *w, bool embedded)
{
#ifdef QT_NO_COMBOBOX
    const bool isReadOnlyCombo = false;
#else
    const bool isReadOnlyCombo = qobject_cast<const QComboBox *>(w) != 0;
#endif

    if (bg && bg->brush.style() == Qt::SolidPattern) {
        if (isReadOnlyCombo) {
            p->setBrush(cg, QPalette::Base, bg->brush); // for windows, windowxp
            p->setBrush(cg, QPalette::Button, bg->brush); // for plastique
        } else {
            p->setBrush(cg, w->backgroundRole(), bg->brush);
            //p->setBrush(cg, QPalette::Window, bg->brush);
        }
    }

    if (embedded) {
        /* For embedded widgets (ComboBox, SpinBox and ScrollArea) we want the embedded widget
         * to be transparent when we have a transparent background or border image */
        if ((hasBackground() && background()->isTransparent())
            || (hasBorder() && border()->hasBorderImage() && border()->borderImage()->middleRect.isValid()))
            p->setBrush(cg, w->backgroundRole(), Qt::NoBrush);
    }

    if (!hasPalette())
        return;

    if (pal->foreground.style() != Qt::NoBrush) {
        if (isReadOnlyCombo) {
            p->setBrush(cg, QPalette::ButtonText, pal->foreground);
        } else {
            p->setBrush(cg, w->foregroundRole(), pal->foreground);
            p->setBrush(cg, QPalette::WindowText, pal->foreground);
        }
        p->setBrush(cg, QPalette::Text, pal->foreground);
    }
    if (pal->selectionBackground.style() != Qt::NoBrush)
        p->setBrush(cg, QPalette::Highlight, pal->selectionBackground);
    if (pal->selectionForeground.style() != Qt::NoBrush)
        p->setBrush(cg, QPalette::HighlightedText, pal->selectionForeground);
    if (pal->alternateBackground.style() != Qt::NoBrush)
        p->setBrush(cg, QPalette::AlternateBase, pal->alternateBackground);
}

///////////////////////////////////////////////////////////////////////////////
// Style rules
#define WIDGET(x) (static_cast<QWidget *>(x.ptr))

class QStyleSheetStyleSelector : public StyleSelector
{
public:
    QStyleSheetStyleSelector() { }

    bool nodeNameEquals(NodePtr node, const QString& name) const
    {
        if (WIDGET(node)->inherits(name.toLatin1()))
            return true;
#ifndef QT_NO_TOOLTIP
        if (name == QLatin1String("QToolTip")
            && QString::fromLatin1("QTipLabel")== QString::fromLatin1(WIDGET(node)->metaObject()->className()))
            return true;
#endif
        const QMetaObject *metaObject = WIDGET(node)->metaObject();
        do {
            QString className = QString::fromUtf8(metaObject->className());
            className.replace(QLatin1Char(':'), QLatin1Char('-'));
            if (className == name)
                return true;
            metaObject = metaObject->superClass();
        } while (metaObject != 0);
        return false;
    }
    QString attribute(NodePtr node, const QString& name) const
    {
        QVariant value = WIDGET(node)->property(name.toLatin1());
        if (!value.isValid()) {
            if (name == QLatin1String("class")) {
                QString className = QString::fromLatin1(WIDGET(node)->metaObject()->className());
                className.replace(QLatin1Char(':'), QLatin1Char('-'));
                return className;
            } else if (name == QLatin1String("style")) {
                QStyleSheetStyle *proxy = qobject_cast<QStyleSheetStyle *>(WIDGET(node)->style());
                if (proxy)
                    return QString::fromLatin1(proxy->baseStyle()->metaObject()->className());
            }
        }
        return value.toString();
    }
    bool hasAttribute(NodePtr node, const QString& name) const
    { return name == QLatin1String("class")
             || name == QLatin1String("style")
             || WIDGET(node)->metaObject()->indexOfProperty(name.toLatin1()) != -1
             || WIDGET(node)->dynamicPropertyNames().contains(name.toLatin1()); }
    bool hasAttributes(NodePtr) const
    { return true; }
    QStringList nodeIds(NodePtr node) const
    { return QStringList(WIDGET(node)->objectName()); }
    bool isNullNode(NodePtr node) const
    { return node.ptr == 0; }
    NodePtr parentNode(NodePtr node) const
    { NodePtr n; n.ptr = WIDGET(node)->parentWidget(); return n; }
    NodePtr previousSiblingNode(NodePtr) const
    { NodePtr n; n.ptr = 0; return n; }
    NodePtr duplicateNode(NodePtr node) const
    { return node; }
    void freeNode(NodePtr) const
    { }
};

static bool unstylable(const QWidget *w)
{
    if (w->windowType() == Qt::Desktop)
        return true;

    if (!w->styleSheet().isEmpty())
        return false;

#ifndef QT_NO_SCROLLAREA
    if (const QAbstractScrollArea *sa = qobject_cast<const QAbstractScrollArea *>(w->parentWidget())) {
        if (sa->viewport() == w)
            return true;
    }
#endif
#ifndef QT_NO_LINEEDIT
    else if (qobject_cast<const QLineEdit *>(w)) {
        if (0
#ifndef QT_NO_COMBOBOX
            || qobject_cast<const QComboBox *>(w->parentWidget())
#endif
#ifndef QT_NO_SPINBOX
            || qobject_cast<const QAbstractSpinBox *>(w->parentWidget())
#endif
            )
            return true;
    }
#endif
#ifndef QT_NO_FRAME
    // detect QComboBoxPrivateContainer
    else if (qobject_cast<const QFrame *>(w)) {
        if (0
#ifndef QT_NO_COMBOBOX
            || qobject_cast<const QComboBox *>(w->parentWidget())
#endif
           )
            return true;
    }
#endif
    return false;
}

QVector<QCss::StyleRule> QStyleSheetStyle::styleRules(const QWidget *w) const
{
    if (!w)
        return QVector<StyleRule>();

    if (styleRulesCache->contains(w))
        return styleRulesCache->value(w);

    QObject::connect(w, SIGNAL(destroyed(QObject*)), this, SLOT(widgetDestroyed(QObject*)));
    if (unstylable(w)) {
        QVector<StyleRule> emptyRule;
        styleRulesCache->insert(w, emptyRule);
        return emptyRule;
    }

    QStyleSheetStyleSelector styleSelector;

    StyleSheet defaultSs;
    if (!styleSheetCache->contains(0)) {
        Parser parser(QLatin1String(":/trolltech/stylesheet/default.qss"), true);
        if (!parser.parse(&defaultSs))
            qWarning("Could not parse default stylesheet");
        defaultSs.origin = StyleSheetOrigin_UserAgent;
        styleSheetCache->insert(0, defaultSs);
    } else {
        defaultSs = styleSheetCache->value(0);
    }
    styleSelector.styleSheets += defaultSs;

    if (!qApp->styleSheet().isEmpty()) {
        StyleSheet appSs;
        if (!styleSheetCache->contains(qApp)) {
            QString ss = qApp->styleSheet();
            if (ss.startsWith(QLatin1String("file:///")))
                ss.remove(0, 8);
            Parser parser1(ss, qApp->styleSheet() != ss);
            if (!parser1.parse(&appSs))
                qWarning("Could not parse application stylesheet");
            appSs.origin = StyleSheetOrigin_Inline;
            appSs.depth = 1;
            styleSheetCache->insert(qApp, appSs);
        } else {
            appSs = styleSheetCache->value(qApp);
        }
        styleSelector.styleSheets += appSs;
    }

    QVector<QCss::StyleSheet> widgetSs;
    for (const QWidget *wid = w; wid; wid = wid->parentWidget()) {
        StyleSheet ss;
        if (!styleSheetCache->contains(wid)) {
            Parser parser(wid->styleSheet());
            if (!parser.parse(&ss) && wid == w) {
                Parser parser2(QLatin1String("* {") + wid->styleSheet() + QLatin1String("}"));
                if (!parser2.parse(&ss))
                   qWarning("Could not parse stylesheet of widget %p", wid);
            }
            ss.origin = StyleSheetOrigin_Inline;
            styleSheetCache->insert(wid, ss);
        } else {
            ss = styleSheetCache->value(wid);
        }
        widgetSs.prepend(ss);
    }

    for (int i = 0; i < widgetSs.count(); i++)
        widgetSs[i].depth = i + 2;

    styleSelector.styleSheets += widgetSs;

    StyleSelector::NodePtr n;
    n.ptr = (void *)w;
    QVector<QCss::StyleRule> rules = styleSelector.styleRulesForNode(n);
    if (w->property("_q_stylesheet_polished").toBool() == true)
        styleRulesCache->insert(w, rules);
    return rules;
}

/////////////////////////////////////////////////////////////////////////////////////////
// Rendering rules
enum PseudoElement {
    PseudoElement_None,
    PseudoElement_DownArrow,
    PseudoElement_UpArrow,
    PseudoElement_LeftArrow,
    PseudoElement_RightArrow,
    PseudoElement_Indicator,
    PseudoElement_ExclusiveIndicator,
    PseudoElement_PushButtonMenuIndicator,
    PseudoElement_ComboBoxDropDown,
    PseudoElement_ComboBoxArrow,
    PseudoElement_Item,
    PseudoElement_SpinBoxUpButton,
    PseudoElement_SpinBoxUpArrow,
    PseudoElement_SpinBoxDownButton,
    PseudoElement_SpinBoxDownArrow,
    PseudoElement_GroupBoxTitle,
    PseudoElement_GroupBoxIndicator,
    PseudoElement_ToolButtonMenu,
    PseudoElement_ToolButtonMenuArrow,
    PseudoElement_ToolButtonDownArrow,
    PseudoElement_ToolBoxTab,
    PseudoElement_ScrollBarSlider,
    PseudoElement_ScrollBarAddPage,
    PseudoElement_ScrollBarSubPage,
    PseudoElement_ScrollBarAddLine,
    PseudoElement_ScrollBarSubLine,
    PseudoElement_ScrollBarFirst,
    PseudoElement_ScrollBarLast,
    PseudoElement_ScrollBarUpArrow,
    PseudoElement_ScrollBarDownArrow,
    PseudoElement_ScrollBarLeftArrow,
    PseudoElement_ScrollBarRightArrow,
    PseudoElement_SplitterHandle,
    PseudoElement_ToolBarHandle,
    PseudoElement_ToolBarSeparator,
    PseudoElement_MenuScroller,
    PseudoElement_MenuTearoff,
    PseudoElement_MenuCheckMark,
    PseudoElement_MenuSeparator,
    PseudoElement_MenuIcon,
    PseudoElement_MenuRightArrow,
    PseudoElement_TreeViewBranch,
    PseudoElement_HeaderViewSection,
    PseudoElement_HeaderViewUpArrow,
    PseudoElement_HeaderViewDownArrow,
    PseudoElement_ProgressBarChunk,
    PseudoElement_TabBarTab,
    PseudoElement_TabBarScroller,
    PseudoElement_TabBarTear,
    PseudoElement_SliderGroove,
    PseudoElement_SliderHandle,
    PseudoElement_SliderAddPage,
    PseudoElement_SliderSubPage,
    PseudoElement_SliderTickmark,
    PseudoElement_TabWidgetPane,
    PseudoElement_TabWidgetTabBar,
    PseudoElement_TabWidgetLeftCorner,
    PseudoElement_TabWidgetRightCorner,
    NumPseudoElements
};

struct PseudoElementInfo {
    QStyle::SubControl subControl;
    const char *name;
};

static PseudoElementInfo knownPseudoElements[NumPseudoElements] = {
    { QStyle::SC_None, "", },
    { QStyle::SC_None, "down-arrow" },
    { QStyle::SC_None, "up-arrow" },
    { QStyle::SC_None, "left-arrow" },
    { QStyle::SC_None, "right-arrow" },
    { QStyle::SC_None, "indicator" },
    { QStyle::SC_None, "indicator" },
    { QStyle::SC_None, "menu-indicator" },
    { QStyle::SC_ComboBoxArrow, "drop-down" },
    { QStyle::SC_ComboBoxArrow, "down-arrow" },
    { QStyle::SC_None, "item" },
    { QStyle::SC_SpinBoxUp, "up-button" },
    { QStyle::SC_SpinBoxUp, "up-arrow" },
    { QStyle::SC_SpinBoxDown, "down-button" },
    { QStyle::SC_SpinBoxDown, "down-arrow" },
    { QStyle::SC_GroupBoxLabel, "title" },
    { QStyle::SC_GroupBoxCheckBox, "indicator" },
    { QStyle::SC_ToolButtonMenu, "menu-button" },
    { QStyle::SC_ToolButtonMenu, "menu-arrow" },
    { QStyle::SC_None, "menu-indicator" },
    { QStyle::SC_None, "tab" },
    { QStyle::SC_ScrollBarSlider, "handle" },
    { QStyle::SC_ScrollBarAddPage, "add-page" },
    { QStyle::SC_ScrollBarSubPage, "sub-page" },
    { QStyle::SC_ScrollBarAddLine, "add-line" },
    { QStyle::SC_ScrollBarSubLine, "sub-line" },
    { QStyle::SC_ScrollBarFirst, "first" },
    { QStyle::SC_ScrollBarLast, "last" },
    { QStyle::SC_ScrollBarSubLine, "up-arrow" },
    { QStyle::SC_ScrollBarAddLine, "down-arrow" },
    { QStyle::SC_ScrollBarSubLine, "left-arrow" },
    { QStyle::SC_ScrollBarAddLine, "right-arrow" },
    { QStyle::SC_None, "handle" },
    { QStyle::SC_None, "handle" },
    { QStyle::SC_None, "separator" },
    { QStyle::SC_None, "scroller" },
    { QStyle::SC_None, "tearoff" },
    { QStyle::SC_None, "indicator" },
    { QStyle::SC_None, "separator" },