qstylesheetstyle.cpp

奇趣公司比较新的qt/emd版本

    { QStyle::SC_None, "icon" },
    { QStyle::SC_None, "right-arrow" },
    { QStyle::SC_None, "branch" },
    { QStyle::SC_None, "section" },
    { QStyle::SC_None, "down-arrow" },
    { QStyle::SC_None, "up-arrow" },
    { QStyle::SC_None, "chunk" },
    { QStyle::SC_None, "tab" },
    { QStyle::SC_None, "scroller" },
    { QStyle::SC_None, "tear" },
    { QStyle::SC_SliderGroove, "groove" },
    { QStyle::SC_SliderHandle, "handle" },
    { QStyle::SC_None, "add-page" },
    { QStyle::SC_None, "sub-page"},
    { QStyle::SC_SliderTickmarks, "tick-mark" },
    { QStyle::SC_None, "pane" },
    { QStyle::SC_None, "tab-bar" },
    { QStyle::SC_None, "left-corner" },
    { QStyle::SC_None, "right-corner" }
};

QVector<Declaration> declarations(const QVector<StyleRule> &styleRules, const QString &part, int pseudoClass = PseudoClass_Unspecified)
{
    QVector<Declaration> decls;
    for (int i = 0; i < styleRules.count(); i++) {
        const Selector& selector = styleRules.at(i).selectors.at(0);
        // Rules with pseudo elements don't cascade. This is an intentional
        // diversion for CSS
        if (part.compare(selector.pseudoElement(), Qt::CaseInsensitive) != 0)
            continue;
        int negated = 0;
        int cssClass = selector.pseudoClass(&negated);
        if ((cssClass == PseudoClass_Unspecified)
            || ((((cssClass & pseudoClass) == cssClass)) && ((negated & pseudoClass) == 0)))
            decls += styleRules.at(i).declarations;
    }
    return decls;
}

int QStyleSheetStyle::nativeFrameWidth(const QWidget *w)
{
    QStyle *base = baseStyle();

#ifndef QT_NO_SPINBOX
    if (qobject_cast<const QAbstractSpinBox *>(w))
        return base->pixelMetric(QStyle::PM_SpinBoxFrameWidth, 0, w);
#endif

#ifndef QT_NO_COMBOBOX
    if (qobject_cast<const QComboBox *>(w))
        return base->pixelMetric(QStyle::PM_ComboBoxFrameWidth, 0, w);
#endif

#ifndef QT_NO_MENU
    if (qobject_cast<const QMenu *>(w))
        return base->pixelMetric(QStyle::PM_MenuPanelWidth, 0, w);
#endif

#ifndef QT_NO_MENUBAR
    if (qobject_cast<const QMenuBar *>(w))
        return base->pixelMetric(QStyle::PM_MenuBarPanelWidth, 0, w);
#endif

    if (QString::fromLatin1(w->metaObject()->className()) == QLatin1String("QTipLabel"))
        return base->pixelMetric(QStyle::PM_ToolTipLabelFrameWidth, 0, w);

    return base->pixelMetric(QStyle::PM_DefaultFrameWidth, 0, w);
}

static int pseudoClass(QStyle::State state)
{
    int pc = (state & QStyle::State_Enabled)
             ? PseudoClass_Enabled : PseudoClass_Disabled;
    if (state & QStyle::State_Sunken)
        pc |= PseudoClass_Pressed;
    if (state & QStyle::State_MouseOver)
        pc |= PseudoClass_Hover;
    if (state & QStyle::State_HasFocus)
        pc |= PseudoClass_Focus;
    if (state & QStyle::State_On)
        pc |= PseudoClass_On;
    if (state & QStyle::State_Off)
        pc |= PseudoClass_Off;
    if (state & QStyle::State_NoChange)
        pc |= PseudoClass_Indeterminate;
    if (state & QStyle::State_Selected)
        pc |= PseudoClass_Selected;
    if (state & QStyle::State_Horizontal)
        pc |= PseudoClass_Horizontal;
    else
        pc |= PseudoClass_Vertical;
    if (state & (QStyle::State_Open | QStyle::State_On | QStyle::State_Sunken))
        pc |= PseudoClass_Open;
    else
        pc |= PseudoClass_Closed;
    if (state & QStyle::State_Children)
        pc |= PseudoClass_Children;
    if (state & QStyle::State_Sibling)
        pc |= PseudoClass_Sibling;
    if (state & QStyle::State_ReadOnly)
        pc |= PseudoClass_ReadOnly;
    if (state & QStyle::State_Item)
        pc |= PseudoClass_Item;

    return pc;
}

QRenderRule QStyleSheetStyle::renderRule(const QWidget *w, int element, int state) const
{
    if (!w)
        return QRenderRule();

    const QString part = QLatin1String(knownPseudoElements[element].name);
    if (renderRulesCache->contains(w)) {
        QHash<int, QRenderRule> &renderRules = (*renderRulesCache)[w][part];

        if (renderRules.contains(state))
            return renderRules[state]; // already computed before
    }

    QVector<Declaration> decls = declarations(styleRules(w), part, state);
    QRenderRule newRule(decls, w);
    if (w->property("_q_stylesheet_polished").toBool() == true)
        (*renderRulesCache)[w][part][state] = newRule;
    return newRule;
}

QRenderRule QStyleSheetStyle::renderRule(const QWidget *w, const QStyleOption *opt, int pseudoElement) const
{
    if (!w)
        return QRenderRule();

    int extraClass = 0;
    QStyle::State state = opt ? opt->state : QStyle::State(QStyle::State_None);

    if (const QStyleOptionComplex *complex = qstyleoption_cast<const QStyleOptionComplex *>(opt)) {
        if (pseudoElement != PseudoElement_None) {
            // if not an active subcontrol, just pass enabled/disabled
            QStyle::SubControl subControl = knownPseudoElements[pseudoElement].subControl;

            if (!(complex->activeSubControls & subControl))
                state = QStyle::State(state & (QStyle::State_Enabled | QStyle::State_Horizontal));
        }

        switch (pseudoElement) {
        case PseudoElement_ComboBoxDropDown:
        case PseudoElement_ComboBoxArrow:
            state |= (complex->state & (QStyle::State_On|QStyle::State_ReadOnly));
            break;
        case PseudoElement_SpinBoxUpButton:
        case PseudoElement_SpinBoxDownButton:
        case PseudoElement_SpinBoxUpArrow:
        case PseudoElement_SpinBoxDownArrow:
#ifndef QT_NO_SPINBOX
            if (const QStyleOptionSpinBox *sb = qstyleoption_cast<const QStyleOptionSpinBox *>(opt)) {
                bool on = false;
                bool up = pseudoElement == PseudoElement_SpinBoxUpButton
                          || pseudoElement == PseudoElement_SpinBoxUpArrow;
                if ((sb->stepEnabled & QAbstractSpinBox::StepUpEnabled) && up)
                    on = true;
                else if ((sb->stepEnabled & QAbstractSpinBox::StepDownEnabled) && !up)
                    on = true;
                state |= (on ? QStyle::State_On : QStyle::State_Off);
            }
#endif // QT_NO_SPINBOX
            break;
        case PseudoElement_GroupBoxTitle:
            state |= (complex->state & (QStyle::State_MouseOver | QStyle::State_Sunken));
            break;
        case PseudoElement_ToolButtonMenu:
        case PseudoElement_ToolButtonMenuArrow:
        case PseudoElement_ToolButtonDownArrow:
            state |= complex->state & QStyle::State_MouseOver;
            if (complex->state & QStyle::State_Sunken ||
                complex->activeSubControls & QStyle::SC_ToolButtonMenu)
                state |= QStyle::State_Sunken;
            break;
        case PseudoElement_SliderGroove:
            state |= complex->state & QStyle::State_MouseOver;
            break;
        default:
            break;
        }

        if (const QStyleOptionComboBox *combo = qstyleoption_cast<const QStyleOptionComboBox *>(opt)) {
            // QStyle::State_On is set when the popup is being shown
            // Propagate EditField Pressed state
            if (pseudoElement == PseudoElement_None
                && (complex->activeSubControls & QStyle::SC_ComboBoxEditField)
                && (!(state & QStyle::State_MouseOver))) {
                state |= QStyle::State_Sunken;
            }

            if (!combo->frame)
                extraClass |= PseudoClass_Frameless;
            if (!combo->editable)
                extraClass |= PseudoClass_ReadOnly;
            else
                extraClass |= PseudoClass_Editable;
#ifndef QT_NO_SPINBOX
        } else if (const QStyleOptionSpinBox *spin = qstyleoption_cast<const QStyleOptionSpinBox *>(opt)) {
            if (!spin->frame)
                extraClass |= PseudoClass_Frameless;
#endif // QT_NO_SPINBOX
        } else if (const QStyleOptionGroupBox *gb = qstyleoption_cast<const QStyleOptionGroupBox *>(opt)) {
            if (gb->features & QStyleOptionFrameV2::Flat)
                extraClass |= PseudoClass_Flat;
            if (gb->lineWidth == 0)
                extraClass |= PseudoClass_Frameless;
        }
    } else {
        // handle simple style options
        if (const QStyleOptionMenuItem *mi = qstyleoption_cast<const QStyleOptionMenuItem *>(opt)) {
            if (mi->menuItemType == QStyleOptionMenuItem::DefaultItem)
                extraClass |= PseudoClass_Default;
            if (mi->checkType == QStyleOptionMenuItem::Exclusive)
                extraClass |= PseudoClass_Exclusive;
            else if (mi->checkType == QStyleOptionMenuItem::NonExclusive)
                extraClass |= PseudoClass_NonExclusive;
            if (mi->checkType != QStyleOptionMenuItem::NotCheckable)
                extraClass |= (mi->checked) ? PseudoClass_Checked : PseudoClass_Unchecked;
        } else if (const QStyleOptionHeader *hdr = qstyleoption_cast<const QStyleOptionHeader *>(opt)) {
            if (hdr->position == QStyleOptionHeader::OnlyOneSection)
                extraClass |= PseudoClass_OnlyOne;
            else if (hdr->position == QStyleOptionHeader::Beginning)
                extraClass |= PseudoClass_First;
            else if (hdr->position == QStyleOptionHeader::End)
                extraClass |= PseudoClass_Last;
            else if (hdr->position == QStyleOptionHeader::Middle)
                extraClass |= PseudoClass_Middle;

            if (hdr->selectedPosition == QStyleOptionHeader::NextAndPreviousAreSelected)
                extraClass |= (PseudoClass_NextSelected | PseudoClass_PreviousSelected);
            else if (hdr->selectedPosition == QStyleOptionHeader::NextIsSelected)
                extraClass |= PseudoClass_NextSelected;
            else if (hdr->selectedPosition == QStyleOptionHeader::PreviousIsSelected)
                extraClass |= PseudoClass_PreviousSelected;
#ifndef QT_NO_TABWIDGET
        } else if (const QStyleOptionTabWidgetFrame *tab = qstyleoption_cast<const QStyleOptionTabWidgetFrame *>(opt)) {
            switch (tab->shape) {
                case QTabBar::RoundedNorth:
                case QTabBar::TriangularNorth:
                    extraClass |= PseudoClass_Top;
                    break;
                case QTabBar::RoundedSouth:
                case QTabBar::TriangularSouth:
                    extraClass |= PseudoClass_Bottom;
                    break;
                case QTabBar::RoundedEast:
                case QTabBar::TriangularEast:
                    extraClass |= PseudoClass_Left;
                    break;
                case QTabBar::RoundedWest:
                case QTabBar::TriangularWest:
                    extraClass |= PseudoClass_Right;
                    break;
                default:
                    break;
            }
#endif
#ifndef QT_NO_TABBAR
        } else if (const QStyleOptionTab *tab = qstyleoption_cast<const QStyleOptionTab *>(opt)) {
            if (tab->position == QStyleOptionTab::OnlyOneTab)
                extraClass |= PseudoClass_OnlyOne;
            else if (tab->position == QStyleOptionTab::Beginning)
                extraClass |= PseudoClass_First;
            else if (tab->position == QStyleOptionTab::End)
                extraClass |= PseudoClass_Last;
            else if (tab->position == QStyleOptionTab::Middle)
                extraClass |= PseudoClass_Middle;

            if (tab->selectedPosition == QStyleOptionTab::NextIsSelected)
                extraClass |= PseudoClass_NextSelected;
            else if (tab->selectedPosition == QStyleOptionTab::PreviousIsSelected)
                extraClass |= PseudoClass_PreviousSelected;

            switch (tab->shape) {
                case QTabBar::RoundedNorth:
                case QTabBar::TriangularNorth:
                    extraClass |= PseudoClass_Top;
                    break;
                case QTabBar::RoundedSouth:
                case QTabBar::TriangularSouth:
                    extraClass |= PseudoClass_Bottom;
                    break;
                case QTabBar::RoundedEast:
                case QTabBar::TriangularEast:
                    extraClass |= PseudoClass_Left;
                    break;
                case QTabBar::RoundedWest:
                case QTabBar::TriangularWest:
                    extraClass |= PseudoClass_Right;
                    break;
                default:
                    break;
            }
#endif // QT_NO_TABBAR
        } else if (const QStyleOptionButton *btn = qstyleoption_cast<const QStyleOptionButton *>(opt)) {
            if (btn->features & QStyleOptionButton::Flat)
                extraClass |= PseudoClass_Flat;
            if (btn->features & QStyleOptionButton::DefaultButton)
                extraClass |= PseudoClass_Default;
        } else if (const QStyleOptionFrame *frm = qstyleoption_cast<const QStyleOptionFrame *>(opt)) {
            if (frm->lineWidth == 0)
                extraClass |= PseudoClass_Frameless;
            if (const QStyleOptionFrameV2 *frame2 = qstyleoption_cast<const QStyleOptionFrameV2 *>(opt)) {
                if (frame2->features & QStyleOptionFrameV2::Flat)
                    extraClass |= PseudoClass_Flat;
            }
        }
#ifndef QT_NO_TOOLBAR
        else if (const QStyleOptionToolBar *tb = qstyleoption_cast<const QStyleOptionToolBar *>(opt)) {
            if (tb->toolBarArea == Qt::LeftToolBarArea)
                extraClass |= PseudoClass_Left;
            else if (tb->toolBarArea == Qt::RightToolBarArea)
                extraClass |= PseudoClass_Right;
            else if (tb->toolBarArea == Qt::TopToolBarArea)
                extraClass |= PseudoClass_Top;
            else if (tb->toolBarArea == Qt::BottomToolBarArea)
                extraClass |= PseudoClass_Bottom;

            if (tb->positionWithinLine == QStyleOptionToolBar::Beginning)
                extraClass |= PseudoClass_First;
            else if (tb->positionWithinLine == QStyleOptionToolBar::Middle)
                extraClass |= PseudoClass_Middle;
            else if (tb->positionWithinLine == QStyleOptionToolBar::End)
                extraClass |= PseudoClass_Last;
            else if (tb->positionWithinLine == QStyleOptionToolBar::OnlyOne)
                extraClass |= PseudoClass_OnlyOne;
        }
#endif // QT_NO_TOOLBAR
#ifndef QT_NO_TOOLBOX
        else if (const QStyleOptionToolBoxV2 *tab = qstyleoption_cast<const QStyleOptionToolBoxV2 *>(opt)) {
            if (tab->position == QStyleOptionToolBoxV2::OnlyOneTab)
                extraClass |= PseudoClass_OnlyOne;
            else if (tab->position == QStyleOptionToolBoxV2::Beginning)
                extraClass |= PseudoClass_First;
            else if (tab->position == QStyleOptionToolBoxV2::End)
                extraClass |= PseudoClass_Last;
            else if (tab->position == QStyleOptionToolBoxV2::Middle)
                extraClass |= PseudoClass_Middle;

            if (tab->selectedPosition == QStyleOptionToolBoxV2::NextIsSelected)
                extraClass |= PseudoClass_NextSelected;
            else if (tab->selectedPosition == QStyleOptionToolBox