qdecorationdefault_qws.cpp

奇趣公司比较新的qt/emd版本

    int titleHeight = hasTitle ? titleBarHeight(widget) : 0;
    int bw = hasBorder ? BORDER_WIDTH : 0;
    int bbw = hasBorder ? BOTTOM_BORDER_WIDTH : 0;

    QRegion region;
    switch (decorationRegion) {
        case All: {
                QRect r(rect.left() - bw,
                        rect.top() - titleHeight - bw,
                        rect.width() + 2 * bw,
                        rect.height() + titleHeight + bw + bbw);
                region = r;
                region -= rect;
            }
            break;

        case Title: {
                QRect r(rect.left()
                        + (hasSysMenu ? menu_width : 0),
                        rect.top() - titleHeight,
                        rect.width()
                        - (hasSysMenu ? menu_width : 0)
                        - close_width
                        - (hasMaximize ? maximize_width : 0)
                        - (hasMinimize ? minimize_width : 0)
                        - (hasContextHelp ? help_width : 0),

                        titleHeight);
                if (r.width() > 0)
                    region = r;
            }
            break;

        case Top: {
                QRect r(rect.left() + CORNER_GRAB,
                        rect.top() - titleHeight - bw,
                        rect.width() - 2 * CORNER_GRAB,
                        bw);
                region = r;
            }
            break;

        case Left: {
                QRect r(rect.left() - bw,
                        rect.top() - titleHeight + CORNER_GRAB,
                        bw,
                        rect.height() + titleHeight - 2 * CORNER_GRAB);
                region = r;
            }
            break;

        case Right: {
                QRect r(rect.right() + 1,
                        rect.top() - titleHeight + CORNER_GRAB,
                        bw,
                        rect.height() + titleHeight - 2 * CORNER_GRAB);
                region = r;
            }
            break;

        case Bottom: {
                QRect r(rect.left() + CORNER_GRAB,
                        rect.bottom() + 1,
                        rect.width() - 2 * CORNER_GRAB,
                        bw);
                region = r;
            }
            break;

        case TopLeft: {
                QRect r1(rect.left() - bw,
                        rect.top() - bw - titleHeight,
                        CORNER_GRAB + bw,
                        bw);

                QRect r2(rect.left() - bw,
                        rect.top() - bw - titleHeight,
                        bw,
                        CORNER_GRAB + bw);

                region = QRegion(r1) + r2;
            }
            break;

        case TopRight: {
                QRect r1(rect.right() - CORNER_GRAB,
                        rect.top() - bw - titleHeight,
                        CORNER_GRAB + bw,
                        bw);

                QRect r2(rect.right() + 1,
                        rect.top() - bw - titleHeight,
                        bw,
                        CORNER_GRAB + bw);

                region = QRegion(r1) + r2;
            }
            break;

        case BottomLeft: {
                QRect r1(rect.left() - bw,
                        rect.bottom() + 1,
                        CORNER_GRAB + bw,
                        bw);

                QRect r2(rect.left() - bw,
                        rect.bottom() - CORNER_GRAB,
                        bw,
                        CORNER_GRAB + bw);
                region = QRegion(r1) + r2;
            }
            break;

        case BottomRight: {
                QRect r1(rect.right() - CORNER_GRAB,
                        rect.bottom() + 1,
                        CORNER_GRAB + bw,
                        bw);

                QRect r2(rect.right() + 1,
                        rect.bottom() - CORNER_GRAB,
                        bw,
                        CORNER_GRAB + bw);
                region = QRegion(r1) + r2;
            }
            break;

        case Menu: {
                if (hasSysMenu) {
                    region = QRect(rect.left(), rect.top() - titleHeight,
                                   menu_width, titleHeight);
                }
            }
            break;

        case Help: {
                if (hasContextHelp) {
                    QRect r(rect.right()
                            - close_width
                            - (hasMaximize ? maximize_width : 0)
                            - (hasMinimize ? minimize_width : 0)
                            - help_width + 1, rect.top() - titleHeight,
                            help_width, titleHeight);
                    if (r.left() > rect.left() + titleHeight)
                        region = r;
                }
            }
            break;


        case Minimize: {
                if (hasMinimize && !isMinimized) {
                    QRect r(rect.right() - close_width
                            - (hasMaximize ? maximize_width : 0)
                            - minimize_width + 1, rect.top() - titleHeight,
                            minimize_width, titleHeight);
                    if (r.left() > rect.left() + titleHeight)
                        region = r;
                }
            }
            break;

        case Maximize: {
                if (hasMaximize && !isMaximized) {
                    QRect r(rect.right() - close_width - maximize_width + 1,
                            rect.top() - titleHeight, maximize_width, titleHeight);
                    if (r.left() > rect.left() + titleHeight)
                        region = r;
                }
            }
            break;

        case Normalize: {
                if (hasMinimize && isMinimized) {
                    QRect r(rect.right() - close_width
                            - (hasMaximize ? maximize_width : 0)
                            - minimize_width + 1, rect.top() - titleHeight,
                            minimize_width, titleHeight);
                    if (r.left() > rect.left() + titleHeight)
                        region = r;
                } else if (hasMaximize && isMaximized) {
                    QRect r(rect.right() - close_width - maximize_width + 1,
                            rect.top() - titleHeight, maximize_width, titleHeight);
                    if (r.left() > rect.left() + titleHeight)
                        region = r;
                }
            }
            break;

        case Close: {
                QRect r(rect.right() - close_width + 1, rect.top() - titleHeight,
                        close_width, titleHeight);
                if (r.left() > rect.left() + titleHeight)
                    region = r;
            }
            break;

    default: {
        int i = 1;
        while (i) {
            if (i & decorationRegion)
                region += this->region(widget, rect, i);
            i <<= 1;
        }
    }
            break;
    }

    return region;
}

bool QDecorationDefault::paint(QPainter *painter, const QWidget *widget, int decorationRegion,
                               DecorationState state)
{
    if (decorationRegion == None)
        return false;

    const QRect titleRect = QDecoration::region(widget, Title).boundingRect();
    const QPalette pal = QApplication::palette();
    int titleHeight = titleRect.height();
    int titleWidth = titleRect.width();
    QRegion oldClipRegion = painter->clipRegion();


    Qt::WindowFlags flags = widget->windowFlags();
    bool hasBorder = !widget->isMaximized();
    bool hasTitle = flags & Qt::WindowTitleHint;
    bool hasSysMenu = flags & Qt::WindowSystemMenuHint;
    bool hasContextHelp = flags & Qt::WindowContextHelpButtonHint;
    bool hasMinimize = flags & Qt::WindowMinimizeButtonHint;
    bool hasMaximize = flags & Qt::WindowMaximizeButtonHint;

    bool paintAll = (decorationRegion == int(All));
    bool handled = false;

    bool porterDuff = painter->paintEngine()->hasFeature(QPaintEngine::PorterDuff);

    if ((paintAll || decorationRegion & Borders) && state == Normal && hasBorder) {
        if (hasTitle) { // reduce flicker
            QRect rect(widget->rect());
            QRect r(rect.left(), rect.top() - titleHeight,
                    rect.width(), titleHeight);
            painter->setClipRegion(oldClipRegion - r);
        }
        QRect br = QDecoration::region(widget).boundingRect();
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_Source);
        qDrawWinPanel(painter, br.x(), br.y(), br.width(),
                    br.height(), pal, false,
                    &pal.brush(QPalette::Window));
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_SourceOver);
        handled |= true;
    }

    if ((paintAll || decorationRegion & Title && titleWidth > 0) && state == Normal && hasTitle) {
        painter->setClipRegion(oldClipRegion);
        QBrush titleBrush;
        QPen   titlePen;

        if (widget == qApp->activeWindow()) {
            titleBrush = pal.brush(QPalette::Highlight);
            titlePen   = pal.color(QPalette::HighlightedText);
        } else {
            titleBrush = pal.brush(QPalette::Window);
            titlePen   = pal.color(QPalette::Text);
        }

        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_Source);
        qDrawShadePanel(painter,
                        titleRect.x(), titleRect.y(), titleRect.width(), titleRect.height(),
                        pal, true, 1, &titleBrush);
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_SourceOver);

        painter->setPen(titlePen);
        painter->drawText(titleRect.x() + 4, titleRect.y(),
                          titleRect.width() - 8, titleRect.height(),
                          Qt::AlignVCenter, widget->windowTitle());
        handled |= true;
    }

    if (state != Hover) {
        painter->setClipRegion(oldClipRegion);
        if ((paintAll || decorationRegion & Menu) && hasSysMenu) {
            paintButton(painter, widget, Menu, state, pal);
            handled |= true;
        }

        if ((paintAll || decorationRegion & Help) && hasContextHelp) {
            paintButton(painter, widget, Help, state, pal);
            handled |= true;
        }

        if ((paintAll || decorationRegion & Minimize) && hasMinimize) {
            paintButton(painter, widget, Minimize, state, pal);
            handled |= true;
        }

        if ((paintAll || decorationRegion & Maximize) && hasMaximize) {
            paintButton(painter, widget,
                        ((widget->windowState() & Qt::WindowMaximized)? Normalize : Maximize),
                        state, pal);
            handled |= true;
        }

        if (paintAll || decorationRegion & Close) {
            paintButton(painter, widget, Close, state, pal);
            handled |= true;
        }
    }
    return handled;
}

void QDecorationDefault::paintButton(QPainter *painter, const QWidget *widget,
                                     int buttonRegion, DecorationState state, const QPalette &pal)
{
    int xoff = 2;
    int yoff = 2;

    const QPixmap pm = pixmapFor(widget, buttonRegion, xoff, yoff);
    QRect brect(QDecoration::region(widget, buttonRegion).boundingRect());
    bool porterDuff = painter->paintEngine()->hasFeature(QPaintEngine::PorterDuff);

    if (state & QDecoration::Pressed) {
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_Source);
        qDrawWinPanel(painter, brect, pal, true, &pal.brush(QPalette::Window));
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_SourceOver);
        ++xoff;
        ++yoff;
    } else {
        painter->fillRect(brect, pal.brush(QPalette::Window));
    }

    if (!pm.isNull())
        painter->drawPixmap(brect.x() + xoff, brect.y() + yoff, pm);
}


#endif // QT_NO_QWS_DECORATION_DEFAULT