qcommonstyle.cpp

奇趣公司比较新的qt/emd版本

        p->setBrush(opt->palette.background());
        p->drawRect(opt->rect.adjusted(0, 0, -1, -1));
        p->setPen(oldPen);
        p->setBrush(oldBrush);
        break;
    }
#ifndef QT_NO_TABBAR
    case PE_IndicatorTabTear:
        if (const QStyleOptionTab *tab = qstyleoption_cast<const QStyleOptionTab *>(opt)) {
            bool rtl = tab->direction == Qt::RightToLeft;
            QRect rect = tab->rect;
            QPainterPath path;

            rect.setTop(rect.top() + ((tab->state & State_Selected) ? 1 : 3));
            rect.setBottom(rect.bottom() - ((tab->state & State_Selected) ? 0 : 2));

            path.moveTo(QPoint(rtl ? rect.right() : rect.left(), rect.top()));
            int count = 4;
            for(int jags = 1; jags <= count; ++jags, rtl = !rtl)
                path.lineTo(QPoint(rtl ? rect.left() : rect.right(), rect.top() + jags * rect.height()/count));

            p->setPen(QPen(tab->palette.light(), .8));
            p->setBrush(tab->palette.background());
            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
    case PE_IndicatorColumnViewArrow: {
    if (const QStyleOptionViewItem *viewOpt = qstyleoption_cast<const QStyleOptionViewItem *>(opt)) {
        bool reverse = (viewOpt->direction == Qt::RightToLeft);
        p->save();
        QPainterPath path;
        int x = viewOpt->rect.x() + 1;
        int offset = (viewOpt->rect.height() / 3);
        int height = (viewOpt->rect.height()) - offset * 2;
        if (height % 2 == 1)
            --height;
        int x2 = x + height - 1;
        if (reverse) {
            x = viewOpt->rect.x() + viewOpt->rect.width() - 1;
            x2 = x - height + 1;
        }
        path.moveTo(x, viewOpt->rect.y() + offset);
        path.lineTo(x, viewOpt->rect.y() + offset + height);
        path.lineTo(x2, viewOpt->rect.y() + offset+height/2);
        path.closeSubpath();
        if (viewOpt->state & QStyle::State_Selected ) {
            if (viewOpt->showDecorationSelected) {
                QColor color = viewOpt->palette.color(QPalette::Active, QPalette::HighlightedText);
                p->setPen(color);
                p->setBrush(color);
            } else {
                QColor color = viewOpt->palette.color(QPalette::Active, QPalette::WindowText);
                p->setPen(color);
                p->setBrush(color);
            }

        } else {
            QColor color = viewOpt->palette.color(QPalette::Active, QPalette::Mid);
            p->setPen(color);
            p->setBrush(color);
        }
        p->drawPath(path);

        // draw the vertical and top triangle line
        if (!(viewOpt->state & QStyle::State_Selected)) {
            QPainterPath lines;
            lines.moveTo(x, viewOpt->rect.y() + offset);
            lines.lineTo(x, viewOpt->rect.y() + offset + height);
            lines.moveTo(x, viewOpt->rect.y() + offset);
            lines.lineTo(x2, viewOpt->rect.y() + offset+height/2);
            QColor color = viewOpt->palette.color(QPalette::Active, QPalette::Dark);
            p->setPen(color);
            p->drawPath(lines);
        }
        p->restore();
    }
    break; }
    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);
            if (!(btn->features & (QStyleOptionButton::Flat | QStyleOptionButton::CommandLinkButton))
                || btn->state & (State_Sunken | State_On)
                || (btn->features & QStyleOptionButton::CommandLinkButton && btn->state & State_MouseOver)) {
                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 + 2, ir.height()/2 - mbi/2 + 3, mbi - 6, mbi - 6);
                drawPrimitive(PE_IndicatorArrowDown, &newBtn, p, widget);
            }
        }
        break;
 case CE_PushButtonLabel:
        if (const QStyleOptionButton *button = qstyleoption_cast<const QStyleOptionButton *>(opt)) {
            QRect textRect = button->rect;
            uint tf = Qt::AlignVCenter | Qt::TextShowMnemonic;
            if (!styleHint(SH_UnderlineShortcut, button, widget))
                tf |= Qt::TextHideMnemonic;

            if (!button->icon.isNull()) {
                //Center both icon and text
                QRect iconRect;
                QIcon::Mode mode = button->state & State_Enabled ? QIcon::Normal : QIcon::Disabled;
                if (mode == QIcon::Normal && button->state & State_HasFocus)
                    mode = QIcon::Active;
                QIcon::State state = QIcon::Off;
                if (button->state & State_On)
                    state = QIcon::On;

                QPixmap pixmap = button->icon.pixmap(button->iconSize, mode, state);
                int labelWidth = pixmap.width();
                int labelHeight = pixmap.height();
                int iconSpacing = 4;//### 4 is currently hardcoded in QPushButton::sizeHint()
                int textWidth = button->fontMetrics.boundingRect(opt->rect, tf, button->text).width();
                if (!button->text.isEmpty())
                    labelWidth += (textWidth + iconSpacing);

                iconRect = QRect(textRect.x() + (textRect.width() - labelWidth) / 2,
                                 textRect.y() + (textRect.height() - labelHeight) / 2,
                                 pixmap.width(), pixmap.height());

                iconRect = visualRect(button->direction, textRect, iconRect);

                tf |= Qt::AlignLeft; //left align, we adjust the text-rect instead

                if (button->direction == Qt::RightToLeft)
                    textRect.setRight(iconRect.left() - iconSpacing);
                else
                    textRect.setLeft(iconRect.left() + iconRect.width() + iconSpacing);

                if (button->state & (State_On | State_Sunken))
                    iconRect.translate(pixelMetric(PM_ButtonShiftHorizontal, opt, widget),
                                       pixelMetric(PM_ButtonShiftVertical, opt, widget));
                p->drawPixmap(iconRect, pixmap);
            } else {
                tf |= Qt::AlignHCenter;
            }
            if (button->state & (State_On | State_Sunken))
                textRect.translate(pixelMetric(PM_ButtonShiftHorizontal, opt, widget),
                             pixelMetric(PM_ButtonShiftVertical, opt, widget));

            if (button->features & QStyleOptionButton::HasMenu) {
                int indicatorSize = pixelMetric(PM_MenuButtonIndicator, button, widget);
                if (button->direction == Qt::LeftToRight)
                    textRect = textRect.adjusted(0, 0, -indicatorSize, 0);
                else
                    textRect = textRect.adjusted(indicatorSize, 0, 0, 0);
            }
            drawItemText(p, textRect, tf, button->palette, (button->state & State_Enabled),
                         button->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::WindowText);
            }
        }
        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);