qstylesheetstyle.cpp

奇趣公司比较新的qt/emd版本

        break;
    case TileMode_Repeat:
        if (!bi->topEdge.isNull())
            qDrawCenterTiledPixmap(p, topEdgeRect, bi->topEdge);
        if (!bi->bottomEdge.isNull())
            qDrawCenterTiledPixmap(p, bottomEdgeRect, bi->bottomEdge);
        if (bi->middleRect.isValid()) {
            if (bi->vertStretch == TileMode_Repeat) {
                qDrawCenterTiledPixmap(p, pr, bi->middle);
            } else if (bi->vertStretch == TileMode_Stretch) {
                QPixmap scaled = bi->middle.scaled(bi->middle.width(), int(pr.height()));
                qDrawCenterTiledPixmap(p, pr, scaled);
            }
        }
        break;
    case TileMode_Round:
        if (!bi->topEdge.isNull()) {
            int rwh = (int)pr.width()/ceil(pr.width()/bi->topEdge.width());
            QPixmap scaled = bi->topEdge.scaled(rwh, bi->topEdge.height());
            int blank = int(pr.width()) % rwh;
            p->drawTiledPixmap(QRectF(br.x() + l + blank/2, br.y(), pr.width() - blank, t),
                               scaled);
        }
        if (!bi->bottomEdge.isNull()) {
            int rwh = (int) pr.width()/ceil(pr.width()/bi->bottomEdge.width());
            QPixmap scaled = bi->bottomEdge.scaled(rwh, bi->bottomEdge.height());
            int blank = int(pr.width()) % rwh;
            p->drawTiledPixmap(QRectF(br.x() + l+ blank/2, br.y()+br.height()-b,
                                      pr.width() - blank, b), scaled);
        }
        break;
    default:
        break;
    }

    QRectF leftEdgeRect(br.x(), br.y() + t, l, pr.height());
    QRectF rightEdgeRect(br.x() + br.width()- r, br.y() + t, r, pr.height());

    switch (bi->vertStretch) {
    case TileMode_Stretch:
         if (bi->leftEdgeRect.isValid())
              p->drawPixmap(leftEdgeRect, pix, bi->leftEdgeRect);
        if (bi->rightEdgeRect.isValid())
            p->drawPixmap(rightEdgeRect, pix, bi->rightEdgeRect);
        break;
    case TileMode_Repeat:
        if (!bi->leftEdge.isNull())
            qDrawCenterTiledPixmap(p, leftEdgeRect, bi->leftEdge);
        if (!bi->rightEdge.isNull())
            qDrawCenterTiledPixmap(p, rightEdgeRect, bi->rightEdge);
        break;
    case TileMode_Round:
        if (!bi->leftEdge.isNull()) {
            int rwh = (int) pr.height()/ceil(pr.height()/bi->leftEdge.height());
            QPixmap scaled = bi->leftEdge.scaled(bi->leftEdge.width(), rwh);
            int blank = int(pr.height()) % rwh;
            p->drawTiledPixmap(QRectF(br.x(), br.y() + t + blank/2, l, pr.height() - blank),
                               scaled);
        }
        if (!bi->rightEdge.isNull()) {
            int rwh = (int) pr.height()/ceil(pr.height()/bi->rightEdge.height());
            QPixmap scaled = bi->rightEdge.scaled(bi->rightEdge.width(), rwh);
            int blank = int(pr.height()) % rwh;
            p->drawTiledPixmap(QRectF(br.x() + br.width() - r, br.y()+t+blank/2, r,
                                      pr.height() - blank), scaled);
        }
        break;
    default:
        break;
    }

    p->setRenderHint(QPainter::SmoothPixmapTransform, wasSmoothPixmapTransform);
    unsetClip(p);
}

QRect QRenderRule::originRect(const QRect &rect, Origin origin) const
{
    switch (origin) {
    case Origin_Padding:
        return paddingRect(rect);
    case Origin_Border:
        return borderRect(rect);
    case Origin_Content:
        return contentsRect(rect);
    case Origin_Margin:
    default:
        return rect;
    }
}

void QRenderRule::drawBackgroundImage(QPainter *p, const QRect &rect, QPoint off)
{
    if (!hasBackground())
        return;

    const QPixmap& bgp = background()->pixmap;
    if (bgp.isNull())
        return;

    setClip(p, borderRect(rect));

    if (background()->origin != background()->clip) {
        p->save();
        p->setClipRect(originRect(rect, background()->clip), Qt::IntersectClip);
    }

    if (background()->attachment == Attachment_Fixed)
        off = QPoint(0, 0);

    QRect r = originRect(rect, background()->origin);
    QRect aligned = QStyle::alignedRect(Qt::LeftToRight, background()->position, bgp.size(), r);
    QRect inter = aligned.intersected(r);

    switch (background()->repeat) {
    case Repeat_Y:
        p->drawTiledPixmap(inter.x(), r.y(), inter.width(), r.height(), bgp,
                           inter.x() - aligned.x() + off.x(),
                           bgp.height() - int(aligned.y() - r.y()) % bgp.height() + off.y());
        break;
    case Repeat_X:
        p->drawTiledPixmap(r.x(), inter.y(), r.width(), inter.height(), bgp,
                           bgp.width() - int(aligned.x() - r.x())%bgp.width() + off.x(),
                           inter.y() - aligned.y() + off.y());
        break;
    case Repeat_XY:
        p->drawTiledPixmap(r, bgp,
                           QPoint(bgp.width() - int(aligned.x() - r.x())% bgp.width() + off.x(),
                                  bgp.height() - int(aligned.y() - r.y())%bgp.height() + off.y()));
        break;
    case Repeat_None:
    default:
        p->drawPixmap(inter.x(), inter.y(), bgp, inter.x() - aligned.x() + off.x(),
                      inter.y() - aligned.y() + off.y(), inter.width(), inter.height());
        break;
    }


    if (background()->origin != background()->clip)
        p->restore();

    unsetClip(p);
}

void QRenderRule::getRadii(const QRect &br, QSize *tlr, QSize *trr, QSize *blr, QSize *brr) const
{
    Q_ASSERT(hasBorder());
    const QSize *radii = border()->radii;
    *tlr = radii[0].expandedTo(QSize(0, 0));
    *trr = radii[1].expandedTo(QSize(0, 0));
    *blr = radii[2].expandedTo(QSize(0, 0));
    *brr = radii[3].expandedTo(QSize(0, 0));
    if (tlr->width() + trr->width() > br.width())
        *tlr = *trr = QSize(0, 0);
    if (blr->width() + brr->width() > br.width())
        *blr = *brr = QSize(0, 0);
    if (tlr->height() + blr->height() > br.height())
        *tlr = *blr = QSize(0, 0);
    if (trr->height() + brr->height() > br.height())
        *trr = *brr = QSize(0, 0);
}

void QRenderRule::drawBorder(QPainter *p, const QRect& rect)
{
    if (!hasBorder())
        return;

    const QRectF br(rect);
    if (border()->hasBorderImage()) {
        drawBorderImage(p, rect);
        return;
    }

    const BorderStyle *styles = border()->styles;
    const int *borders = border()->borders;
    const QBrush *colors = border()->colors;

    QSize tlr, trr, blr, brr;
    getRadii(rect, &tlr, &trr, &blr, &brr);

    bool wasAntialiased = p->renderHints() & QPainter::Antialiasing;
    p->setRenderHint(QPainter::Antialiasing);

    // Drawn in increasing order of precendence
    if (styles[BottomEdge] != BorderStyle_None) {
        qreal dw1 = (blr.width() || paintsOver(BottomEdge, LeftEdge)) ? 0 : borders[LeftEdge];
        qreal dw2 = (brr.width() || paintsOver(BottomEdge, RightEdge)) ? 0 : borders[RightEdge];
        qreal x1 = br.x() + blr.width();
        qreal y1 = br.y() + br.height() - borders[BottomEdge];
        qreal x2 = br.x() + br.width() - brr.width();
        qreal y2 = br.y() + br.height() ;

        qDrawEdge(p, x1, y1, x2, y2, dw1, dw2, BottomEdge, styles[BottomEdge], colors[BottomEdge]);
        if (blr.width() || brr.width())
            qDrawRoundedCorners(p, x1, y1, x2, y2, blr, brr, BottomEdge, styles[BottomEdge], colors[BottomEdge]);
    }
    if (styles[RightEdge] != BorderStyle_None) {
        qreal dw1 = (trr.height() || paintsOver(RightEdge, TopEdge)) ? 0 : borders[TopEdge];
        qreal dw2 = (brr.height() || paintsOver(RightEdge, BottomEdge)) ? 0 : borders[BottomEdge];
        qreal x1 = br.x() + br.width() - borders[RightEdge];
        qreal y1 = br.y() + trr.height();
        qreal x2 = br.x() + br.width();
        qreal y2 = br.y() + br.height() - brr.height();

        qDrawEdge(p, x1, y1, x2, y2, dw1, dw2, RightEdge, styles[RightEdge], colors[RightEdge]);
        if (trr.height() || brr.height())
            qDrawRoundedCorners(p, x1, y1, x2, y2, trr, brr, RightEdge, styles[RightEdge], colors[RightEdge]);
    }
    if (styles[LeftEdge] != BorderStyle_None) {
        qreal dw1 = (tlr.height() || paintsOver(LeftEdge, TopEdge)) ? 0 : borders[TopEdge];
        qreal dw2 = (blr.height() || paintsOver(LeftEdge, BottomEdge)) ? 0 : borders[BottomEdge];
        qreal x1 = br.x();
        qreal y1 = br.y() + tlr.height();
        qreal x2 = br.x() + borders[LeftEdge];
        qreal y2 = br.y() + br.height() - blr.height();

        qDrawEdge(p, x1, y1, x2, y2, dw1, dw2, LeftEdge, styles[LeftEdge], colors[LeftEdge]);
        if (tlr.height() || blr.height())
            qDrawRoundedCorners(p, x1, y1, x2, y2, tlr, blr, LeftEdge, styles[LeftEdge], colors[LeftEdge]);
    }
    if (styles[TopEdge] != BorderStyle_None) {
        qreal dw1 = (tlr.width() || paintsOver(TopEdge, LeftEdge)) ? 0 : borders[LeftEdge];
        qreal dw2 = (trr.width() || paintsOver(TopEdge, RightEdge)) ? 0 : borders[RightEdge];
        qreal x1 = br.x() + tlr.width();
        qreal y1 = br.y();
        qreal x2 = br.left() + br.width() - trr.width();
        qreal y2 = br.y() + borders[TopEdge];

        qDrawEdge(p, x1, y1, x2, y2, dw1, dw2, TopEdge, styles[TopEdge], colors[TopEdge]);
        if (tlr.width() || trr.width())
            qDrawRoundedCorners(p, x1, y1, x2, y2, tlr, trr, TopEdge, styles[TopEdge], colors[TopEdge]);
    }

    p->setRenderHint(QPainter::Antialiasing, wasAntialiased);
}

QPainterPath QRenderRule::borderClip(QRect r)
{
    if (!hasBorder())
        return QPainterPath();

    QSize tlr, trr, blr, brr;
    getRadii(r, &tlr, &trr, &blr, &brr);
    if (tlr.isNull() && trr.isNull() && blr.isNull() && brr.isNull())
        return QPainterPath();

    const QRectF rect(r);
    const int *borders = border()->borders;
    QPainterPath path;
    qreal curY = rect.y() + borders[TopEdge]/2.0;
    path.moveTo(rect.x() + tlr.width(), curY);
    path.lineTo(rect.right() - trr.width(), curY);
    qreal curX = rect.right() - borders[RightEdge]/2.0;
    path.arcTo(curX - 2*trr.width() + borders[RightEdge], curY,
               trr.width()*2 - borders[RightEdge], trr.height()*2 - borders[TopEdge], 90, -90);

    path.lineTo(curX, rect.bottom() - brr.height());
    curY = rect.bottom() - borders[BottomEdge]/2.0;
    path.arcTo(curX - 2*brr.width() + borders[RightEdge], curY - 2*brr.height() + borders[BottomEdge],
               brr.width()*2 - borders[RightEdge], brr.height()*2 - borders[BottomEdge], 0, -90);

    path.lineTo(rect.x() + blr.width(), curY);
    curX = rect.left() + borders[LeftEdge]/2.0;
    path.arcTo(curX, rect.bottom() - 2*blr.height() + borders[BottomEdge]/2,
               blr.width()*2 - borders[LeftEdge], blr.height()*2 - borders[BottomEdge], 270, -90);

    path.lineTo(curX, rect.top() + tlr.height());
    path.arcTo(curX, rect.top() + borders[TopEdge]/2,
               tlr.width()*2 - borders[LeftEdge], tlr.height()*2 - borders[TopEdge], 180, -90);

    path.closeSubpath();
    return path;
}

void QRenderRule::setClip(QPainter *p, const QRect &rect)
{
    if (clipset++)
        return;
    clipPath = borderClip(rect);
    if (!clipPath.isEmpty()) {
        p->save();
        p->setClipPath(clipPath);
    }
}

void QRenderRule::unsetClip(QPainter *p)
{
    if (--clipset)
        return;
    if (!clipPath.isEmpty())
        p->restore();
}

void QRenderRule::drawBackground(QPainter *p, const QRect& rect, const QPoint& off)
{
    setClip(p, borderRect(rect));
    QBrush brush = hasBackground() ? background()->brush : QBrush();
    if (brush.style() == Qt::NoBrush)
        brush = defaultBackground;

    if (brush.style() != Qt::NoBrush) {
        Origin origin = hasBackground() ? background()->clip : Origin_Border;
        // ### fix for  gradients
        p->fillRect(originRect(rect, origin), brush);
    }

    drawBackgroundImage(p, rect, off);
    unsetClip(p);
}

void QRenderRule::drawFrame(QPainter *p, const QRect& rect)
{
    drawBackground(p, rect);
    if (hasBorder())
        drawBorder(p, borderRect(rect));
}

void QRenderRule::drawImage(QPainter *p, const QRect &rect)
{
    if (!hasImage())
        return;
    img->icon.paint(p, rect, img->alignment);
}

void QRenderRule::drawRule(QPainter *p, const QRect& rect)
{
    drawFrame(p, rect);
    drawImage(p, contentsRect(rect));
}

// *shudder* , *horror*, *whoa* <-- what you might feel when you see the functions below
void QRenderRule::configurePalette(QPalette *p, QPalette::ColorRole fr, QPalette::ColorRole br)
{
    if (bg && bg->brush.style() != Qt::NoBrush) {
        if (br != QPalette::NoRole)
            p->setBrush(br, bg->brush);
        p->setBrush(QPalette::Window, bg->brush);
    }

    if (!hasPalette())
        return;

    if (pal->foreground.style() != Qt::NoBrush) {
        if (fr != QPalette::NoRole)
            p->setBrush(fr, pal->foreground);
        p->setBrush(QPalette::WindowText, pal->foreground);
        p->setBrush(QPalette::Text, pal->foreground);
    }