qplastiquestyle.cpp

奇趣公司比较新的qt/emd版本

#endif
{
    if (!qgetenv("QT_STYLE_NO_PIXMAPCACHE").isNull())
        UsePixmapCache = false;
}

/*!
  \internal
 */
QPlastiqueStylePrivate::~QPlastiqueStylePrivate()
{
}

/*!
    \class QPlastiqueStyle
    \brief The QPlastiqueStyle class provides a widget style similar to the
    Plastik style available in KDE.

    The Plastique style provides a default look and feel for widgets on X11
    that closely resembles the Plastik style, introduced by Sandro Giessl in
    KDE 3.2.

    \img qplastiquestyle.png
    \sa QWindowsXPStyle, QMacStyle, QWindowsStyle, QCDEStyle, QMotifStyle
*/

/*!
    Constructs a QPlastiqueStyle object.
*/
QPlastiqueStyle::QPlastiqueStyle()
    : QWindowsStyle(*new QPlastiqueStylePrivate)
{
    setObjectName(QLatin1String("Plastique"));
}

/*!
    Destructs the QPlastiqueStyle object.
*/
QPlastiqueStyle::~QPlastiqueStyle()
{
}

/*!
  \reimp
*/
void QPlastiqueStyle::drawPrimitive(PrimitiveElement element, const QStyleOption *option,
                                    QPainter *painter, const QWidget *widget) const
{
    Q_ASSERT(option);

    QColor borderColor = option->palette.background().color().darker(178);
    QColor gradientStartColor = option->palette.button().color().lighter(104);
    QColor gradientStopColor = option->palette.button().color().darker(105);
    QColor baseGradientStartColor = option->palette.base().color().darker(101);
    QColor baseGradientStopColor = option->palette.base().color().darker(106);
    QColor highlightedGradientStartColor = option->palette.button().color().lighter(101);
    QColor highlightedGradientStopColor = mergedColors(option->palette.button().color(), option->palette.highlight().color(), 85);
    QColor highlightedBaseGradientStartColor = option->palette.base().color();
    QColor highlightedBaseGradientStopColor = mergedColors(option->palette.base().color().darker(105), option->palette.highlight().color(), 70);
    QColor highlightedDarkInnerBorderColor = mergedColors(option->palette.button().color(), option->palette.highlight().color(), 35);
    QColor highlightedLightInnerBorderColor = mergedColors(option->palette.button().color(), option->palette.highlight().color(), 58);
    QColor alphaCornerColor;
    if (widget) {
        // ### backgroundrole/foregroundrole should be part of the style option
        alphaCornerColor = mergedColors(option->palette.color(widget->backgroundRole()), borderColor);
    } else {
        alphaCornerColor = mergedColors(option->palette.background().color(), borderColor);
    }
    QColor alphaInnerColor = mergedColors(highlightedLightInnerBorderColor, gradientStartColor);
    QColor alphaInnerColorNoHover = mergedColors(borderColor, gradientStartColor);
    QColor alphaTextColor = mergedColors(option->palette.background().color(), option->palette.text().color());
    QColor alphaLightTextColor = mergedColors(option->palette.background().color().lighter(250), option->palette.text().color().lighter(250));
    QColor lightShadow = option->palette.button().color().lighter(105);
    QColor shadowGradientStartColor = option->palette.button().color().darker(115);
    QColor shadow = shadowGradientStartColor;

    switch (element) {
    case PE_IndicatorButtonDropDown:
        drawPrimitive(PE_PanelButtonTool, option, painter, widget);
        break;
    case PE_FrameDefaultButton: {
        if (!(option->state & QStyle::State_Enabled))
            break;
        painter->setPen(QPen(QColor(0, 0, 0, 127), 0));
        const QLine lines[4] = {
            QLine(option->rect.left() + 2, option->rect.top(),
                  option->rect.right() - 2, option->rect.top()),
            QLine(option->rect.left() + 2, option->rect.bottom(),
                  option->rect.right() - 2, option->rect.bottom()),
            QLine(option->rect.left(), option->rect.top() + 2,
                  option->rect.left(), option->rect.bottom() - 2),
            QLine(option->rect.right(), option->rect.top() + 2,
                  option->rect.right(), option->rect.bottom() - 2) };
        painter->drawLines(lines, 4);

        QPoint points[8];
        points[0] = QPoint(option->rect.left() + 1, option->rect.top() + 1);
        points[1] = QPoint(option->rect.right() - 1, option->rect.top() + 1);
        points[2] = QPoint(option->rect.left() + 1, option->rect.bottom() - 1);
        points[3] = QPoint(option->rect.right() - 1, option->rect.bottom() - 1);
        painter->drawPoints(points, 4);

        painter->setPen(QPen(QColor(0, 0, 0, 63), 0));
        points[0] = QPoint(option->rect.left() + 1, option->rect.top());
        points[1] = QPoint(option->rect.right() - 1, option->rect.top());
        points[2] = QPoint(option->rect.left(), option->rect.top() + 1);
        points[3] = QPoint(option->rect.right(), option->rect.top() + 1);
        points[4] = QPoint(option->rect.left() + 1, option->rect.bottom());
        points[5] = QPoint(option->rect.right() - 1, option->rect.bottom());
        points[6] = QPoint(option->rect.left(), option->rect.bottom() - 1);
        points[7] = QPoint(option->rect.right(), option->rect.bottom() - 1);
        painter->drawPoints(points, 8);

        break;
    }
#ifndef QT_NO_TABWIDGET
    case PE_FrameTabWidget:
        if (const QStyleOptionTabWidgetFrame *twf = qstyleoption_cast<const QStyleOptionTabWidgetFrame *>(option)) {
            if (twf->shape != QTabBar::RoundedNorth && twf->shape != QTabBar::RoundedWest &&
                twf->shape != QTabBar::RoundedSouth && twf->shape != QTabBar::RoundedEast) {
                QWindowsStyle::drawPrimitive(element, option, painter, widget);
                break;
            }

            int borderThickness = pixelMetric(PM_TabBarBaseOverlap, twf, widget);
            bool reverse = (twf->direction == Qt::RightToLeft);

            painter->save();

            // Start by filling the contents of the tab widget frame (which is
            // actually a panel).
            painter->fillRect(option->rect.adjusted(1, 1, -1, -1), option->palette.window());

            QRect tabBarRect;
            switch (twf->shape) {
            case QTabBar::RoundedNorth:
                if (reverse)
                    tabBarRect = QRect(twf->rect.right() - twf->leftCornerWidgetSize.width() - twf->tabBarSize.width() + 1, twf->rect.top(), twf->tabBarSize.width(), borderThickness);
                else
                    tabBarRect = QRect(twf->rect.left() + twf->leftCornerWidgetSize.width(), twf->rect.top(), twf->tabBarSize.width(), borderThickness);
                break ;
            case QTabBar::RoundedWest:
                tabBarRect = QRect(twf->rect.left(), twf->rect.top() + twf->leftCornerWidgetSize.height(), borderThickness, twf->tabBarSize.height());
                break ;
            case QTabBar::RoundedEast:
                tabBarRect = QRect(twf->rect.right() - borderThickness + 1, twf->rect.top()  + twf->leftCornerWidgetSize.height(),
                                   borderThickness, twf->tabBarSize.height());
                break ;
            case QTabBar::RoundedSouth:
                if (reverse)
                    tabBarRect = QRect(twf->rect.right() - twf->leftCornerWidgetSize.width() - twf->tabBarSize.width() + 1,
                                       twf->rect.bottom() - borderThickness + 1, twf->tabBarSize.width(), borderThickness);
                else
                    tabBarRect = QRect(twf->rect.left() + twf->leftCornerWidgetSize.width(),
                                       twf->rect.bottom() - borderThickness + 1, twf->tabBarSize.width(), borderThickness);
                break ;
            default:
                break;
            }

            QRegion region(twf->rect);
            region -= tabBarRect;
            painter->setClipRegion(region);

            // Outer border
            QLine leftLine = QLine(twf->rect.topLeft() + QPoint(0, 2), twf->rect.bottomLeft() - QPoint(0, 2));
            QLine rightLine = QLine(twf->rect.topRight() + QPoint(0, 2), twf->rect.bottomRight() - QPoint(0, 2));
            QLine bottomLine = QLine(twf->rect.bottomLeft() + QPoint(2, 0), twf->rect.bottomRight() - QPoint(2, 0));
            QLine topLine = QLine(twf->rect.topLeft() + QPoint(2, 0), twf->rect.topRight() - QPoint(2, 0));

            QBrush border = option->palette.shadow();
            qBrushSetAlphaF(&border, 0.4);
            painter->setPen(QPen(border, 0));

            QVarLengthArray<QLine, 4> lines;
            QVarLengthArray<QPoint, 8> points;

            lines.append(topLine);

            // Inner border
            QLine innerLeftLine = QLine(leftLine.p1() + QPoint(1, 0), leftLine.p2() + QPoint(1, 0));
            QLine innerRightLine = QLine(rightLine.p1() - QPoint(1, 0), rightLine.p2() - QPoint(1, 0));
            QLine innerBottomLine = QLine(bottomLine.p1() - QPoint(0, 1), bottomLine.p2() - QPoint(0, 1));
            QLine innerTopLine = QLine(topLine.p1() + QPoint(0, 1), topLine.p2() + QPoint(0, 1));

            // Rounded Corner
            QPoint leftBottomOuterCorner = QPoint(innerLeftLine.p2() + QPoint(0, 1));
            QPoint leftBottomInnerCorner1 = QPoint(leftLine.p2() + QPoint(0, 1));
            QPoint leftBottomInnerCorner2 = QPoint(bottomLine.p1() - QPoint(1, 0));
            QPoint rightBottomOuterCorner = QPoint(innerRightLine.p2() + QPoint(0, 1));
            QPoint rightBottomInnerCorner1 = QPoint(rightLine.p2() + QPoint(0, 1));
            QPoint rightBottomInnerCorner2 = QPoint(bottomLine.p2() + QPoint(1, 0));
            QPoint rightTopOuterCorner = QPoint(innerRightLine.p1() - QPoint(0, 1));
            QPoint rightTopInnerCorner1 = QPoint(rightLine.p1() - QPoint(0, 1));
            QPoint rightTopInnerCorner2 = QPoint(topLine.p2() + QPoint(1, 0));
            QPoint leftTopOuterCorner = QPoint(innerLeftLine.p1() - QPoint(0, 1));
            QPoint leftTopInnerCorner1 = QPoint(leftLine.p1() - QPoint(0, 1));
            QPoint leftTopInnerCorner2 = QPoint(topLine.p1() - QPoint(1, 0));

            lines.append(leftLine);
            lines.append(rightLine);
            lines.append(bottomLine);

            painter->drawLines(lines.constData(), lines.size());
            lines.clear();

            points.append(leftBottomOuterCorner);
            points.append(rightBottomOuterCorner);
            points.append(rightTopOuterCorner);
            points.append(leftTopOuterCorner);

            painter->drawPoints(points.constData(), points.size());
            points.clear();

            QBrush innerTopLeft = option->palette.shadow();
            qBrushSetAlphaF(&innerTopLeft, 0.075);
            painter->setPen(QPen(innerTopLeft, 0));

            lines.append(innerLeftLine);
            lines.append(innerTopLine);
            painter->drawLines(lines.constData(), lines.size());
            lines.clear();

            QBrush innerBottomRight = option->palette.shadow();
            qBrushSetAlphaF(&innerBottomRight, 0.23);
            painter->setPen(QPen(innerBottomRight, 0));
            lines.append(innerRightLine);
            lines.append(innerBottomLine);
            painter->drawLines(lines.constData(), lines.size());
            lines.clear();

            QBrush corner = option->palette.shadow();
            qBrushSetAlphaF(&corner, 0.25);
            painter->setPen(QPen(corner, 0));
            points.append(leftBottomInnerCorner1);
            points.append(leftBottomInnerCorner2);
            points.append(rightBottomInnerCorner1);
            points.append(rightBottomInnerCorner2);
            points.append(rightTopInnerCorner1);
            points.append(rightTopInnerCorner2);
            points.append(leftTopInnerCorner1);
            points.append(leftTopInnerCorner2);
            painter->drawPoints(points.constData(), points.size());
            points.clear();

            painter->restore();
        }
        break ;
#endif // QT_NO_TABWIDGET
#ifndef QT_NO_TABBAR
    case PE_FrameTabBarBase:
        if (const QStyleOptionTabBarBase *tbb = qstyleoption_cast<const QStyleOptionTabBarBase *>(option)) {
            if (tbb->shape != QTabBar::RoundedNorth && tbb->shape != QTabBar::RoundedWest &&
                tbb->shape != QTabBar::RoundedSouth && tbb->shape != QTabBar::RoundedEast) {
                QWindowsStyle::drawPrimitive(element, option, painter, widget);
                break;
            }

            painter->save();

            QRegion region(tbb->rect);
            region -= tbb->tabBarRect;
            painter->setClipRegion(region);

            QLine topLine = QLine(tbb->rect.bottomLeft() - QPoint(0, 1), tbb->rect.bottomRight() - QPoint(0, 1));
            QLine bottomLine = QLine(tbb->rect.bottomLeft(), tbb->rect.bottomRight());

            QBrush border = option->palette.shadow();
            qBrushSetAlphaF(&border, 0.4);
            QBrush innerTopLeft = option->palette.shadow();
            qBrushSetAlphaF(&innerTopLeft, 0.075);
            QBrush innerBottomRight = option->palette.shadow();
            qBrushSetAlphaF(&innerBottomRight, 0.23);
            QBrush corner = option->palette.shadow();
            qBrushSetAlphaF(&corner, 0.25);

            if (tbb->shape == QTabBar::RoundedSouth)
                painter->setPen(QPen(corner, 0));
            else
                painter->setPen(QPen(border, 0));
            painter->drawLine(topLine);

            if (tbb->shape != QTabBar::RoundedSouth)
                painter->setPen(QPen(innerTopLeft, 0));
            else
                painter->setPen(QPen(border, 0));
            painter->drawLine(bottomLine);

            painter->restore();
        }
        break ;
#endif // QT_NO_TABBAR
#ifndef QT_NO_GROUPBOX
    case PE_FrameGroupBox:
        if (const QStyleOptionFrame *frame = qstyleoption_cast<const QStyleOptionFrame *>(option)) {
            QStyleOptionFrameV2 frameV2(*frame);
            if (frameV2.features & QStyleOptionFrameV2::Flat) {
                QPen oldPen = painter->pen();
                painter->setPen(borderColor);
                painter->drawLine(frameV2.rect.topLeft(), frameV2.rect.topRight());
                painter->setPen(oldPen);
            } else {
                frameV2.state &= ~(State_Sunken | State_HasFocus);
                drawPrimitive(PE_Frame, &frameV2, painter, widget);
            }
        }
        break;
#endif // QT_NO_GROUPBOX
    case PE_Frame: {
        QFrame::Shadow shadow = QFrame::Plain;
        if (option->state & State_Sunken)
            shadow = QFrame::Sunken;
        else if (option->state & State_Raised)
            shadow = QFrame::Raised;
        qt_plastique_draw_frame(painter, option->rect, option, shadow);
        break;
    }
#ifndef QT_NO_LINEEDIT
    case PE_FrameLineEdit:
        qt_plastique_draw_frame(painter, option->rect, option, QFrame::Sunken);
        break;
    case PE_PanelLineEdit:
        if (const QStyleOptionFrame *lineEdit = qstyleoption_cast<const QStyleOptionFrame *>(option)) {
            // Panel of a line edit inside combo box or spin box is drawn in CC_ComboBox and CC_SpinBox
            if (widget) {
#ifndef QT_NO_COMBOBOX
                if (qobject_cast<const QComboBox *>(widget->parentWidget()))
                    break;
#endif
#ifndef QT_NO_SPINBOX
                if (qobject_cast<const QAbstractSpinBox *>(widget->parentWidget()))
                    break;
#endif
            }