qwsmanager_qws.cpp

奇趣公司比较新的qt/emd版本

        if (g.y() > maxWindowRect.bottom())
            g.setY(maxWindowRect.bottom());
    }

    if (g == d->mousePos)
        return;

    if ( d->managed->isMaximized() )
        return;

    int x = d->managed->geometry().x();
    int y = d->managed->geometry().y();
    int w = d->managed->width();
    int h = d->managed->height();

    QRect geom(d->managed->geometry());

    QPoint delta = g - d->mousePos;
    d->mousePos = g;

    if (d->activeRegion == QDecoration::Title) {
        geom = QRect(x + delta.x(), y + delta.y(), w, h);
    } else {
        bool keepTop = true;
        bool keepLeft = true;
        switch (d->activeRegion) {
        case QDecoration::Top:
            geom.setTop(geom.top() + delta.y());
            keepTop = false;
            break;
        case QDecoration::Bottom:
            geom.setBottom(geom.bottom() + delta.y());
            keepTop = true;
            break;
        case QDecoration::Left:
            geom.setLeft(geom.left() + delta.x());
            keepLeft = false;
            break;
        case QDecoration::Right:
            geom.setRight(geom.right() + delta.x());
            keepLeft = true;
            break;
        case QDecoration::TopRight:
            geom.setTopRight(geom.topRight() + delta);
            keepLeft = true;
            keepTop = false;
            break;
        case QDecoration::TopLeft:
            geom.setTopLeft(geom.topLeft() + delta);
            keepLeft = false;
            keepTop = false;
            break;
        case QDecoration::BottomLeft:
            geom.setBottomLeft(geom.bottomLeft() + delta);
            keepLeft = false;
            keepTop = true;
            break;
        case QDecoration::BottomRight:
            geom.setBottomRight(geom.bottomRight() + delta);
            keepLeft = true;
            keepTop = true;
            break;
        default:
            return;
        }

        QSize newSize = QLayout::closestAcceptableSize(d->managed, geom.size());

        int dx = newSize.width() - geom.width();
        int dy = newSize.height() - geom.height();

        if (keepTop) {
            geom.setBottom(geom.bottom() + dy);
            d->mousePos.ry() += dy;
        } else {
            geom.setTop(geom.top() - dy);
            d->mousePos.ry() -= dy;
        }
        if (keepLeft) {
            geom.setRight(geom.right() + dx);
            d->mousePos.rx() += dx;
        } else {
            geom.setLeft(geom.left() - dx);
            d->mousePos.rx() -= dx;
        }
    }
    if (geom != d->managed->geometry()) {
        QApplication::sendPostedEvents();
        d->managed->setGeometry(geom);
    }
}

void QWSManager::paintEvent(QPaintEvent *)
{
     Q_D(QWSManager);
     d->dirtyRegion(QDecoration::All, QDecoration::Normal);
}

void QWSManagerPrivate::dirtyRegion(int decorationRegion,
                                    QDecoration::DecorationState state,
                                    const QRegion &clip)
{
    if (decorationRegion == QDecoration::All) {
        dirtyRegions.clear();
        dirtyStates.clear();
    }
    int i = dirtyRegions.indexOf(decorationRegion);
    if (i >= 0) {
        dirtyRegions.removeAt(i);
        dirtyStates.removeAt(i);
    }

    dirtyRegions.append(decorationRegion);
    dirtyStates.append(state);

    QTLWExtra *topextra = managed->d_func()->extra->topextra;
    QWidgetBackingStore *bs = topextra->backingStore;
    const QRect clipRect = managed->rect().translated(bs->topLevelOffset());
    QDecoration &dec = QApplication::qwsDecoration();
    QRegion decRegion = dec.region(managed, clipRect, decorationRegion);

    decRegion.translate(-bs->topLevelOffset());
    if (!clip.isEmpty())
        decRegion &= clip;
    managed->d_func()->dirtyWidget_sys(decRegion);
}

/*!
    \internal

    Paints all the dirty regions into \a pixmap.
    Returns the regions that have been repainted.
*/
void QWSManagerPrivate::paint(QPaintDevice *paintDevice, const QRegion &region)
{
    if (dirtyRegions.empty() || !paintDevice || !paintDevice->paintEngine())
        return;

    QTLWExtra *topextra = managed->d_func()->extra->topextra;
    Q_ASSERT(topextra && topextra->backingStore);
    QWidgetBackingStore *bs = topextra->backingStore;

    const QRect clipRect = managed->rect().translated(bs->topLevelOffset());
    QDecoration &dec = QApplication::qwsDecoration();

    QWSWindowSurface *surface;
    surface = static_cast<QWSWindowSurface*>(bs->windowSurface);
    const QRegion clippedRegion = region & surface->clipRegion();

    const QRegion surfaceClip = clippedRegion.translated(bs->topLevelOffset());

    paintDevice->paintEngine()->setSystemClip(surfaceClip);

    QPainter *painter = 0;

    const int numDirty = dirtyRegions.size();
    for (int i = 0; i < numDirty; ++i) {
        int r = dirtyRegions.at(i);
        QDecoration::DecorationState state = dirtyStates.at(i);

        QRegion clipRegion = dec.region(managed, clipRect, r);
        if (!clipRegion.isEmpty()) {
            if (!painter) {
                painter = new QPainter(paintDevice);
                painter->setFont(qApp->font());
                painter->translate(bs->topLevelOffset());
            }
            clipRegion.translate(-bs->topLevelOffset());
            painter->setClipRegion(clipRegion);
            dec.paint(painter, managed, r, state);
        }
    }
    dirtyRegions.clear();
    dirtyStates.clear();
    delete painter;
}

bool QWSManager::repaintRegion(int decorationRegion, QDecoration::DecorationState state)
{
    Q_D(QWSManager);

    d->dirtyRegion(decorationRegion, state);
    return true;
}

void QWSManager::menu(const QPoint &pos)
{
#ifdef QT_NO_MENU
    Q_UNUSED(pos);
#else
    Q_D(QWSManager);
    if (d->popup)
        delete d->popup;

    // Basic window operation menu
    d->popup = new QMenu();
    QApplication::qwsDecoration().buildSysMenu(d->managed, d->popup);
    connect(d->popup, SIGNAL(triggered(QAction*)), SLOT(menuTriggered(QAction*)));

    d->popup->popup(pos);
#endif // QT_NO_MENU
}

void QWSManager::menuTriggered(QAction *action)
{
#ifdef QT_NO_MENU
    Q_UNUSED(action);
#else
    Q_D(QWSManager);
    QApplication::qwsDecoration().menuTriggered(d->managed, action);
    d->popup->deleteLater();
    d->popup = 0;
#endif
}

void QWSManager::startMove()
{
    Q_D(QWSManager);
    d->mousePos = QCursor::pos();
    d->activeRegion = QDecoration::Title;
    d->active = d->managed;
    d->managed->grabMouse();
}

void QWSManager::startResize()
{
    Q_D(QWSManager);
    d->activeRegion = QDecoration::BottomRight;
    d->active = d->managed;
    d->managed->grabMouse();
}

void QWSManager::maximize()
{
    Q_D(QWSManager);
    // find out how much space the decoration needs
    const int screen = QApplication::desktop()->screenNumber(d->managed);
    const QRect desk = QApplication::desktop()->availableGeometry(screen);
    QRect dummy(0, 0, 1, 1);
    QRect nr;
    QRegion r = QApplication::qwsDecoration().region(d->managed, dummy);
    if (r.isEmpty()) {
        nr = desk;
    } else {
        r += dummy; // make sure we get the full window region in case of 0 width borders
        QRect rect = r.boundingRect();
        nr = QRect(desk.x()-rect.x(), desk.y()-rect.y(),
                desk.width() - (rect.width()==1 ? 0 : rect.width()-1), // ==1 -> dummy
                desk.height() - (rect.height()==1 ? 0 : rect.height()-1));
    }
    d->managed->setGeometry(nr);
}

bool QWSManagerPrivate::newCachedRegion(const QPoint &pos)
{
    // Check if anything has changed that would affect the region caching
    if (managed->windowFlags() == cached_region.windowFlags
        && managed->geometry() == cached_region.windowGeometry
        && cached_region.region.contains(pos))
        return false;

    // Update the cached region
    int reg = QApplication::qwsDecoration().regionAt(managed, pos);
    if (QWidget::mouseGrabber())
        reg = QDecoration::None;

    previousRegionType = cached_region.regionType;
    cached_region.regionType = reg;
    cached_region.region = QApplication::qwsDecoration().region(managed, managed->geometry(),
                                                                reg);
    // Make room for borders around the widget, even if the decoration doesn't have a frame.
    if (reg && !(reg & int(QDecoration::Borders))) {
        cached_region.region -= QApplication::qwsDecoration().region(managed, managed->geometry(), QDecoration::Borders);
    }
    cached_region.windowFlags = managed->windowFlags();
    cached_region.windowGeometry = managed->geometry();
//    QRect rec = cached_region.region.boundingRect();
//    qDebug("Updated cached region: 0x%04x (%d, %d)  (%d, %d,  %d, %d)",
//           reg, pos.x(), pos.y(), rec.x(), rec.y(), rec.right(), rec.bottom());
    return true;
}

#endif //QT_NO_QWS_MANAGER