qcommonstyle.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

            p->setRenderHint(QPainter::Antialiasing);
            p->drawPath(path);
        }
        break;
#endif // QT_NO_TABBAR
#ifndef QT_NO_LINEEDIT
    case PE_PanelLineEdit:
        if (const QStyleOptionFrame *panel = qstyleoption_cast<const QStyleOptionFrame *>(opt)) {
            p->fillRect(panel->rect.adjusted(panel->lineWidth, panel->lineWidth, -panel->lineWidth, -panel->lineWidth),
                        panel->palette.brush(QPalette::Base));

            if (panel->lineWidth > 0)
                drawPrimitive(PE_FrameLineEdit, panel, p, widget);
        }
        break;
#endif // QT_NO_LINEEDIT
    default:
        break;
    }
}

#ifndef QT_NO_TOOLBUTTON
static void drawArrow(const QStyle *style, const QStyleOptionToolButton *toolbutton,
                      const QRect &rect, QPainter *painter, const QWidget *widget = 0)
{
    QStyle::PrimitiveElement pe;
    switch (toolbutton->arrowType) {
    case Qt::LeftArrow:
        pe = QStyle::PE_IndicatorArrowLeft;
        break;
    case Qt::RightArrow:
        pe = QStyle::PE_IndicatorArrowRight;
        break;
    case Qt::UpArrow:
        pe = QStyle::PE_IndicatorArrowUp;
        break;
    case Qt::DownArrow:
        pe = QStyle::PE_IndicatorArrowDown;
        break;
    default:
        return;
    }
    QStyleOption arrowOpt;
    arrowOpt.rect = rect;
    arrowOpt.palette = toolbutton->palette;
    arrowOpt.state = toolbutton->state;
    style->drawPrimitive(pe, &arrowOpt, painter, widget);
}
#endif // QT_NO_TOOLBUTTON

/*!
  \reimp
*/
void QCommonStyle::drawControl(ControlElement element, const QStyleOption *opt,
                               QPainter *p, const QWidget *widget) const
{
    switch (element) {

    case CE_PushButton:
        if (const QStyleOptionButton *btn = qstyleoption_cast<const QStyleOptionButton *>(opt)) {
            drawControl(CE_PushButtonBevel, btn, p, widget);
            QStyleOptionButton subopt = *btn;
            subopt.rect = subElementRect(SE_PushButtonContents, btn, widget);
            drawControl(CE_PushButtonLabel, &subopt, p, widget);
            if (btn->state & State_HasFocus) {
                QStyleOptionFocusRect fropt;
                fropt.QStyleOption::operator=(*btn);
                fropt.rect = subElementRect(SE_PushButtonFocusRect, btn, widget);
                drawPrimitive(PE_FrameFocusRect, &fropt, p, widget);
            }
        }
        break;
    case CE_PushButtonBevel:
        if (const QStyleOptionButton *btn = qstyleoption_cast<const QStyleOptionButton *>(opt)) {
            QRect br = btn->rect;
            int dbi = pixelMetric(PM_ButtonDefaultIndicator, btn, widget);
            if (btn->features & QStyleOptionButton::DefaultButton)
                drawPrimitive(PE_FrameDefaultButton, opt, p, widget);
            if (btn->features & QStyleOptionButton::AutoDefaultButton)
                br.setCoords(br.left() + dbi, br.top() + dbi, br.right() - dbi, br.bottom() - dbi);

            QStyleOptionButton tmpBtn = *btn;
            tmpBtn.rect = br;
            drawPrimitive(PE_PanelButtonCommand, &tmpBtn, p, widget);

            if (btn->features & QStyleOptionButton::HasMenu) {
                int mbi = pixelMetric(PM_MenuButtonIndicator, btn, widget);
                QRect ir = btn->rect;
                QStyleOptionButton newBtn = *btn;
                newBtn.rect = QRect(ir.right() - mbi, ir.height() - 20, mbi, ir.height() - 4);
                drawPrimitive(PE_IndicatorArrowDown, &newBtn, p, widget);
            }
        }
        break;
    case CE_PushButtonLabel:
        if (const QStyleOptionButton *btn = qstyleoption_cast<const QStyleOptionButton *>(opt)) {
            QRect ir = btn->rect;
            uint tf = Qt::AlignVCenter | Qt::TextShowMnemonic;
            if (!styleHint(SH_UnderlineShortcut, btn, widget))
                tf |= Qt::TextHideMnemonic;

            if (btn->state & (State_On | State_Sunken))
                ir.translate(pixelMetric(PM_ButtonShiftHorizontal, opt, widget),
                             pixelMetric(PM_ButtonShiftVertical, opt, widget));
            if (!btn->icon.isNull()) {
                QIcon::Mode mode = btn->state & State_Enabled ? QIcon::Normal
                                                              : QIcon::Disabled;
                if (mode == QIcon::Normal && btn->state & State_HasFocus)
                    mode = QIcon::Active;
                QIcon::State state = QIcon::Off;
                if (btn->state & State_On)
                    state = QIcon::On;
                QPixmap pixmap = btn->icon.pixmap(btn->iconSize, mode, state);
                int pixw = pixmap.width();
                int pixh = pixmap.height();
                //Center the icon if there is no text

                QPoint point;
                if (btn->text.isEmpty()) {
                    point = QPoint(ir.x() + ir.width() / 2 - pixw / 2,
                                   ir.y() + ir.height() / 2 - pixh / 2);
                } else {
                    point = QPoint(ir.x() + 2, ir.y() + ir.height() / 2 - pixh / 2);
                }
                if (btn->direction == Qt::RightToLeft)
                    point.rx() += pixw;

                if ((btn->state & (State_On | State_Sunken)) && btn->direction == Qt::RightToLeft)
                    point.rx() -= pixelMetric(PM_ButtonShiftHorizontal, opt, widget) * 2;

                p->drawPixmap(visualPos(btn->direction, btn->rect, point), pixmap);

                if (btn->direction == Qt::RightToLeft)
                    ir.translate(-4, 0);
                else
                    ir.translate(pixw + 4, 0);
                ir.setWidth(ir.width() - (pixw + 4));
                // left-align text if there is
                if (!btn->text.isEmpty())
                    tf |= Qt::AlignLeft;
            } else {
                tf |= Qt::AlignHCenter;
            }
            drawItemText(p, ir, tf, btn->palette, (btn->state & State_Enabled),
                         btn->text, QPalette::ButtonText);
        }
        break;
    case CE_RadioButton:
    case CE_CheckBox:
        if (const QStyleOptionButton *btn = qstyleoption_cast<const QStyleOptionButton *>(opt)) {
            bool isRadio = (element == CE_RadioButton);
            QStyleOptionButton subopt = *btn;
            subopt.rect = subElementRect(isRadio ? SE_RadioButtonIndicator
                                                 : SE_CheckBoxIndicator, btn, widget);
            drawPrimitive(isRadio ? PE_IndicatorRadioButton : PE_IndicatorCheckBox,
                          &subopt, p, widget);
            subopt.rect = subElementRect(isRadio ? SE_RadioButtonContents
                                                 : SE_CheckBoxContents, btn, widget);
            drawControl(isRadio ? CE_RadioButtonLabel : CE_CheckBoxLabel, &subopt, p, widget);
            if (btn->state & State_HasFocus) {
                QStyleOptionFocusRect fropt;
                fropt.QStyleOption::operator=(*btn);
                fropt.rect = subElementRect(isRadio ? SE_RadioButtonFocusRect
                                                    : SE_CheckBoxFocusRect, btn, widget);
                drawPrimitive(PE_FrameFocusRect, &fropt, p, widget);
            }
        }
        break;
    case CE_RadioButtonLabel:
    case CE_CheckBoxLabel:
        if (const QStyleOptionButton *btn = qstyleoption_cast<const QStyleOptionButton *>(opt)) {
            uint alignment = visualAlignment(btn->direction, Qt::AlignLeft | Qt::AlignVCenter);

            if (!styleHint(SH_UnderlineShortcut, btn, widget))
                alignment |= Qt::TextHideMnemonic;
            QPixmap pix;
            QRect textRect = btn->rect;
            if (!btn->icon.isNull()) {
                pix = btn->icon.pixmap(btn->iconSize, btn->state & State_Enabled ? QIcon::Normal : QIcon::Disabled);
                drawItemPixmap(p, btn->rect, alignment, pix);
                if (btn->direction == Qt::RightToLeft)
                    textRect.setRight(textRect.right() - btn->iconSize.width() - 4);
                else
                    textRect.setLeft(textRect.left() + btn->iconSize.width() + 4);
            }
            if (!btn->text.isEmpty()){
                drawItemText(p, textRect, alignment | Qt::TextShowMnemonic,
                    btn->palette, btn->state & State_Enabled, btn->text, QPalette::Foreground);
            }
        }
        break;
#ifndef QT_NO_MENU
    case CE_MenuScroller: {
        p->fillRect(opt->rect, opt->palette.background());
        QStyleOption arrowOpt = *opt;
        arrowOpt.state |= State_Enabled;
        drawPrimitive(((opt->state & State_DownArrow) ? PE_IndicatorArrowDown : PE_IndicatorArrowUp),
                      &arrowOpt, p, widget);
        break; }
    case CE_MenuTearoff:
        if (opt->state & State_Selected)
            p->fillRect(opt->rect, opt->palette.brush(QPalette::Highlight));
        else
            p->fillRect(opt->rect, opt->palette.brush(QPalette::Button));
        p->setPen(QPen(opt->palette.dark().color(), 1, Qt::DashLine));
        p->drawLine(opt->rect.x() + 2, opt->rect.y() + opt->rect.height() / 2 - 1,
                    opt->rect.x() + opt->rect.width() - 4,
                    opt->rect.y() + opt->rect.height() / 2 - 1);
        p->setPen(QPen(opt->palette.light().color(), 1, Qt::DashLine));
        p->drawLine(opt->rect.x() + 2, opt->rect.y() + opt->rect.height() / 2,
                    opt->rect.x() + opt->rect.width() - 4, opt->rect.y() + opt->rect.height() / 2);
        break;
#endif // QT_NO_MENU
#ifndef QT_NO_MENUBAR
    case CE_MenuBarItem:
        if (const QStyleOptionMenuItem *mbi = qstyleoption_cast<const QStyleOptionMenuItem *>(opt)) {
            uint alignment = Qt::AlignCenter | Qt::TextShowMnemonic | Qt::TextDontClip
                            | Qt::TextSingleLine;
            if (!styleHint(SH_UnderlineShortcut, mbi, widget))
                alignment |= Qt::TextHideMnemonic;
            QPixmap pix = mbi->icon.pixmap(pixelMetric(PM_SmallIconSize), (mbi->state & State_Enabled) ? QIcon::Normal : QIcon::Disabled);
            if (!pix.isNull())
                drawItemPixmap(p,mbi->rect, alignment, pix);
            else
                drawItemText(p, mbi->rect, alignment, mbi->palette, mbi->state & State_Enabled,
                             mbi->text, QPalette::ButtonText);
        }
        break;
    case CE_MenuBarEmptyArea:
        if (widget && !widget->testAttribute(Qt::WA_NoSystemBackground))
            p->eraseRect(opt->rect);
        break;
#endif // QT_NO_MENUBAR
#ifndef QT_NO_PROGRESSBAR
    case CE_ProgressBar:
        if (const QStyleOptionProgressBar *pb
                = qstyleoption_cast<const QStyleOptionProgressBar *>(opt)) {
            QStyleOptionProgressBarV2 subopt = *pb;
            subopt.rect = subElementRect(SE_ProgressBarGroove, pb, widget);
            drawControl(CE_ProgressBarGroove, &subopt, p, widget);
            subopt.rect = subElementRect(SE_ProgressBarContents, pb, widget);
            drawControl(CE_ProgressBarContents, &subopt, p, widget);
            if (pb->textVisible) {
                subopt.rect = subElementRect(SE_ProgressBarLabel, pb, widget);
                drawControl(CE_ProgressBarLabel, &subopt, p, widget);
            }
        }
        break;
    case CE_ProgressBarGroove:
        qDrawShadePanel(p, opt->rect, opt->palette, true, 1,
                        &opt->palette.brush(QPalette::Background));
        break;
    case CE_ProgressBarLabel:
        if (const QStyleOptionProgressBar *pb = qstyleoption_cast<const QStyleOptionProgressBar *>(opt)) {
            bool vertical = false;
            if (const QStyleOptionProgressBarV2 *pb2 = qstyleoption_cast<const QStyleOptionProgressBarV2 *>(opt)) {
                vertical = (pb2->orientation == Qt::Vertical);
            }
            if (!vertical) {
                QPalette::ColorRole textRole = QPalette::NoRole;
                if ((pb->textAlignment & Qt::AlignCenter) && pb->textVisible
                    && ((pb->progress - pb->minimum) * 2 >= (pb->maximum - pb->minimum))) {
                    textRole = QPalette::HighlightedText;
                }
                drawItemText(p, pb->rect, Qt::AlignCenter | Qt::TextSingleLine, pb->palette,
                             pb->state & State_Enabled, pb->text, textRole);
            }
        }
        break;
    case CE_ProgressBarContents:
        if (const QStyleOptionProgressBar *pb = qstyleoption_cast<const QStyleOptionProgressBar *>(opt)) {

            QRect rect = pb->rect;
            bool vertical = false;
            bool inverted = false;

            // Get extra style options if version 2
            const QStyleOptionProgressBarV2 *pb2 = qstyleoption_cast<const QStyleOptionProgressBarV2 *>(opt);
            if (pb2) {
                vertical = (pb2->orientation == Qt::Vertical);
                inverted = pb2->invertedAppearance;
            }

            QMatrix m;
            if (vertical) {
                rect = QRect(rect.left(), rect.top(), rect.height(), rect.width()); // flip width and height
                m.translate(rect.height(), 0.0);
                m.rotate(90);
            }

            QPalette pal2 = pb->palette;
            // Correct the highlight color if it is the same as the background
            if (pal2.highlight() == pal2.background())
                pal2.setColor(QPalette::Highlight, pb->palette.color(QPalette::Active,
                                                                     QPalette::Highlight));
            bool reverse = ((!vertical && (pb->direction == Qt::RightToLeft)) || vertical);
            if (inverted)
                reverse = !reverse;
            int fw = 2;
            int w = rect.width() - 2 * fw;
            if (pb->minimum == 0 && pb->maximum == 0) {
                // draw busy indicator
                int x = (pb->progress - pb->minimum) % (w * 2);
                if (x > w)
                    x = 2 * w - x;
                x = reverse ? rect.right() - x : x + rect.x();
                p->setPen(QPen(pal2.highlight().color(), 4));
                p->drawLine(x, rect.y() + 1, x, rect.height() - fw);