qdrawutil.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

{
    QPolygon a;                                // arrow polygon
    switch (type) {
    case Qt::UpArrow:
        a.setPoints(7, -3,1, 3,1, -2,0, 2,0, -1,-1, 1,-1, 0,-2);
        break;
    case Qt::DownArrow:
        a.setPoints(7, -3,-1, 3,-1, -2,0, 2,0, -1,1, 1,1, 0,2);
        break;
    case Qt::LeftArrow:
        a.setPoints(7, 1,-3, 1,3, 0,-2, 0,2, -1,-1, -1,1, -2,0);
        break;
    case Qt::RightArrow:
        a.setPoints(7, -1,-3, -1,3, 0,-2, 0,2, 1,-1, 1,1, 2,0);
        break;
    default:
        break;
    }
    if (a.isEmpty())
        return;

    if (down) {
        x++;
        y++;
    }

    QPen savePen = p->pen();                        // save current pen
    if (down)
        p->setBrushOrigin(p->brushOrigin() + QPoint(1,1));
    p->fillRect(x, y, w, h, pal.brush(QPalette::Button));
    if (down)
        p->setBrushOrigin(p->brushOrigin() - QPoint(1,1));
    if (enabled) {
        a.translate(x+w/2, y+h/2);
        p->setPen(pal.foreground().color());
        p->drawLine(a.at(0), a.at(1));
        p->drawLine(a.at(2), a.at(2));
        p->drawPoint(a[6]);
    } else {
        a.translate(x+w/2+1, y+h/2+1);
        p->setPen(pal.light().color());
        p->drawLine(a.at(0), a.at(1));
        p->drawLine(a.at(2), a.at(2));
        p->drawPoint(a[6]);
        a.translate(-1, -1);
        p->setPen(pal.mid().color());
        p->drawLine(a.at(0), a.at(1));
        p->drawLine(a.at(2), a.at(2));
        p->drawPoint(a[6]);
    }
    p->setPen(savePen);                        // restore pen
}
#endif // QT3_SUPPORT

#if defined(Q_CC_MSVC)
#pragma warning(disable: 4244)
#endif

#ifdef QT3_SUPPORT
#ifndef QT_NO_STYLE_MOTIF
// motif arrows look the same whether they are used or not
// is this correct?
static void qDrawMotifArrow(QPainter *p, Qt::ArrowType type, bool down,
                             int x, int y, int w, int h,
                             const QPalette &pal, bool)
{
    QPolygon bFill;                                // fill polygon
    QPolygon bTop;                                // top shadow.
    QPolygon bBot;                                // bottom shadow.
    QPolygon bLeft;                                // left shadow.
    QMatrix        matrix;                                // xform matrix
    bool vertical = type == Qt::UpArrow || type == Qt::DownArrow;
    bool horizontal = !vertical;
    int         dim = w < h ? w : h;
    int         colspec = 0x0000;                        // color specification array

    if (dim < 2)                                // too small arrow
        return;

    if (dim > 3) {
        if (dim > 6)
            bFill.resize(dim & 1 ? 3 : 4);
        bTop.resize((dim/2)*2);
        bBot.resize(dim & 1 ? dim + 1 : dim);
        bLeft.resize(dim > 4 ? 4 : 2);
        bLeft.putPoints(0, 2, 0,0, 0,dim-1);
        if (dim > 4)
            bLeft.putPoints(2, 2, 1,2, 1,dim-3);
        bTop.putPoints(0, 4, 1,0, 1,1, 2,1, 3,1);
        bBot.putPoints(0, 4, 1,dim-1, 1,dim-2, 2,dim-2, 3,dim-2);

        for(int i=0; i<dim/2-2 ; i++) {
            bTop.putPoints(i*2+4, 2, 2+i*2,2+i, 5+i*2, 2+i);
            bBot.putPoints(i*2+4, 2, 2+i*2,dim-3-i, 5+i*2,dim-3-i);
        }
        if (dim & 1)                                // odd number size: extra line
            bBot.putPoints(dim-1, 2, dim-3,dim/2, dim-1,dim/2);
        if (dim > 6) {                        // dim>6: must fill interior
            bFill.putPoints(0, 2, 1,dim-3, 1,2);
            if (dim & 1)                        // if size is an odd number
                bFill.setPoint(2, dim - 3, dim / 2);
            else
                bFill.putPoints(2, 2, dim-4,dim/2-1, dim-4,dim/2);
        }
    }
    else {
        if (dim == 3) {                        // 3x3 arrow pattern
            bLeft.setPoints(4, 0,0, 0,2, 1,1, 1,1);
            bTop .setPoints(2, 1,0, 1,0);
            bBot .setPoints(2, 1,2, 2,1);
        }
        else {                                        // 2x2 arrow pattern
            bLeft.setPoints(2, 0,0, 0,1);
            bTop .setPoints(2, 1,0, 1,0);
            bBot .setPoints(2, 1,1, 1,1);
        }
    }

    if (type == Qt::UpArrow || type == Qt::LeftArrow) {
        matrix.translate(x, y);
        if (vertical) {
            matrix.translate(0, h - 1);
            matrix.rotate(-90);
        } else {
            matrix.translate(w - 1, h - 1);
            matrix.rotate(180);
        }
        if (down)
            colspec = horizontal ? 0x2334 : 0x2343;
        else
            colspec = horizontal ? 0x1443 : 0x1434;
    }
    else if (type == Qt::DownArrow || type == Qt::RightArrow) {
        matrix.translate(x, y);
        if (vertical) {
            matrix.translate(w-1, 0);
            matrix.rotate(90);
        }
        if (down)
            colspec = horizontal ? 0x2443 : 0x2434;
        else
            colspec = horizontal ? 0x1334 : 0x1343;
    }

    const QColor *cols[5];
    cols[0] = 0;
    cols[1] = &pal.button().color();
    cols[2] = &pal.mid().color();
    cols[3] = &pal.light().color();
    cols[4] = &pal.dark().color();
#define CMID        *cols[(colspec>>12) & 0xf]
#define CLEFT        *cols[(colspec>>8) & 0xf]
#define CTOP        *cols[(colspec>>4) & 0xf]
#define CBOT        *cols[colspec & 0xf]

    QPen     savePen   = p->pen();                // save current pen
    QBrush   saveBrush = p->brush();                // save current brush
    QMatrix wxm = p->matrix();
    QPen     pen(Qt::NoPen);
    const QBrush &brush = pal.brush(QPalette::Button);

    p->setPen(pen);
    p->setBrush(brush);
    p->setMatrix(matrix, true);                // set transformation matrix
    p->drawPolygon(bFill);                        // fill arrow
    p->setBrush(Qt::NoBrush);                        // don't fill

    p->setPen(CLEFT);
    p->drawLines(bLeft);
    p->setPen(CTOP);
    p->drawLines(bTop);
    p->setPen(CBOT);
    p->drawLines(bBot);

    p->setMatrix(wxm);
    p->setBrush(saveBrush);                        // restore brush
    p->setPen(savePen);                        // restore pen

#undef CMID
#undef CLEFT
#undef CTOP
#undef CBOT
}
#endif // QT_NO_STYLE_MOTIF

QRect qItemRect(QPainter *p, Qt::GUIStyle gs,
                int x, int y, int w, int h,
                int flags,
                bool enabled,
                const QPixmap *pixmap,
                const QString& text, int len)
{
    QRect result;

    if (pixmap) {
        if ((flags & Qt::AlignVCenter) == Qt::AlignVCenter)
            y += h/2 - pixmap->height()/2;
        else if ((flags & Qt::AlignBottom) == Qt::AlignBottom)
            y += h - pixmap->height();
        if ((flags & Qt::AlignRight) == Qt::AlignRight)
            x += w - pixmap->width();
        else if ((flags & Qt::AlignHCenter) == Qt::AlignHCenter)
            x += w/2 - pixmap->width()/2;
        else if ((flags & Qt::AlignLeft) != Qt::AlignLeft && QApplication::isRightToLeft())
            x += w - pixmap->width();
        result = QRect(x, y, pixmap->width(), pixmap->height());
    } else if (!text.isNull() && p) {
        result = p->boundingRect(QRect(x, y, w, h), flags, text.left(len));
        if (gs == Qt::WindowsStyle && !enabled) {
            result.setWidth(result.width()+1);
            result.setHeight(result.height()+1);
        }
    } else {
        result = QRect(x, y, w, h);
    }

    return result;
}

void qDrawArrow(QPainter *p, Qt::ArrowType type, Qt::GUIStyle style, bool down,
                 int x, int y, int w, int h,
                 const QPalette &pal, bool enabled)
{
    switch (style) {
        case Qt::WindowsStyle:
            qDrawWinArrow(p, type, down, x, y, w, h, pal, enabled);
            break;
#ifndef QT_NO_STYLE_MOTIF
        case Qt::MotifStyle:
            qDrawMotifArrow(p, type, down, x, y, w, h, pal, enabled);
            break;
#endif
        default:
            qWarning("qDrawArrow: Requested GUI style not supported");
    }
}

void qDrawItem(QPainter *p, Qt::GUIStyle gs,
                int x, int y, int w, int h,
                int flags,
                const QPalette &pal, bool enabled,
                const QPixmap *pixmap,
                const QString& text, int len , const QColor* penColor)
{
    p->setPen(penColor?*penColor:pal.foreground().color());
    if (pixmap) {
        QPixmap  pm(*pixmap);
        bool clip = (flags & Qt::TextDontClip) == 0;
        if (clip) {
            if (pm.width() < w && pm.height() < h)
                clip = false;
            else
                p->setClipRect(x, y, w, h);
        }
        if ((flags & Qt::AlignVCenter) == Qt::AlignVCenter)
            y += h/2 - pm.height()/2;
        else if ((flags & Qt::AlignBottom) == Qt::AlignBottom)
            y += h - pm.height();
        if ((flags & Qt::AlignRight) == Qt::AlignRight)
            x += w - pm.width();
        else if ((flags & Qt::AlignHCenter) == Qt::AlignHCenter)
            x += w/2 - pm.width()/2;
        else if (((flags & Qt::AlignLeft) != Qt::AlignLeft) && QApplication::isRightToLeft()) // Qt::AlignAuto && rightToLeft
            x += w - pm.width();

        if (!enabled) {
            if (pm.hasAlphaChannel()) {                        // pixmap with a mask
                pm = pm.mask();
            } else if (pm.depth() == 1) {        // monochrome pixmap, no mask
                ;
#ifndef QT_NO_IMAGE_HEURISTIC_MASK
            } else {                                // color pixmap, no mask
                QString k;
                k.sprintf("$qt-drawitem-%x", pm.serialNumber());
                if (!QPixmapCache::find(k, pm)) {
                    pm = pm.createHeuristicMask();
                    pm.setMask((QBitmap&)pm);
                    QPixmapCache::insert(k, pm);
                }
#endif
            }
            if (gs == Qt::WindowsStyle) {
                p->setPen(pal.light().color());
                p->drawPixmap(x+1, y+1, pm);
                p->setPen(pal.text().color());
            }
        }
        p->drawPixmap(x, y, pm);
        if (clip)
            p->setClipping(false);
    } else if (!text.isNull()) {
        if (gs == Qt::WindowsStyle && !enabled) {
            p->setPen(pal.light().color());
            p->drawText(x+1, y+1, w, h, flags, text.left(len));
            p->setPen(pal.text().color());
        }
        p->drawText(x, y, w, h, flags, text.left(len));
    }
}
#endif