qworkspace.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

    QPoint wpos(maxRect.left(), maxRect.top());

    bool firstPass = true;

    do {
        if (y + w->height() > maxRect.bottom()) {
            overlap = -1;
        } else if(x + w->width() > maxRect.right()) {
            overlap = -2;
        } else {
            overlap = 0;

            r1.setRect(x, y, w->width(), w->height());

            QWidget *l;
            QList<QWidget *>::Iterator it(widgets.begin());
            while (it != widgets.end()) {
                l = *it;
                ++it;

                if (maxWindow == l)
                    r2 = maxRestore;
                else
                    r2.setRect(l->x(), l->y(), l->width(), l->height());

                if (r2.intersects(r1)) {
                    r2.setCoords(qMax(r1.left(), r2.left()),
                                 qMax(r1.top(), r2.top()),
                                 qMin(r1.right(), r2.right()),
                                 qMin(r1.bottom(), r2.bottom())
                                );

                    overlap += (r2.right() - r2.left()) *
                               (r2.bottom() - r2.top());
                }
            }
        }

        if (overlap == 0) {
            wpos = QPoint(x, y);
            break;
        }

        if (firstPass) {
            firstPass = false;
            minOverlap = overlap;
        } else if (overlap >= 0 && overlap < minOverlap) {
            minOverlap = overlap;
            wpos = QPoint(x, y);
        }

        if (overlap > 0) {
            possible = maxRect.right();
            if (possible - w->width() > x) possible -= w->width();

            QWidget *l;
            QList<QWidget *>::Iterator it(widgets.begin());
            while (it != widgets.end()) {
                l = *it;
                ++it;
                if (maxWindow == l)
                    r2 = maxRestore;
                else
                    r2.setRect(l->x(), l->y(), l->width(), l->height());

                if((y < r2.bottom()) && (r2.top() < w->height() + y)) {
                    if(r2.right() > x)
                        possible = possible < r2.right() ?
                                   possible : r2.right();

                    if(r2.left() - w->width() > x)
                        possible = possible < r2.left() - w->width() ?
                                   possible : r2.left() - w->width();
                }
            }

            x = possible;
        } else if (overlap == -2) {
            x = maxRect.left();
            possible = maxRect.bottom();

            if (possible - w->height() > y) possible -= w->height();

            QWidget *l;
            QList<QWidget *>::Iterator it(widgets.begin());
            while (it != widgets.end()) {
                l = *it;
                ++it;
                if (maxWindow == l)
                    r2 = maxRestore;
                else
                    r2.setRect(l->x(), l->y(), l->width(), l->height());

                if(r2.bottom() > y)
                    possible = possible < r2.bottom() ?
                               possible : r2.bottom();

                if(r2.top() - w->height() > y)
                    possible = possible < r2.top() - w->height() ?
                               possible : r2.top() - w->height();
            }

            y = possible;
        }
    }
    while(overlap != 0 && overlap != -1);

    w->move(wpos);
    updateWorkspace();
}


void QWorkspacePrivate::insertIcon(QWidget* w)
{
    Q_Q(QWorkspace);
    if (!w || icons.contains(w))
        return;
    icons.append(w);
    if (w->parentWidget() != q) {
        w->setParent(q, 0);
        w->move(0,0);
    }
    QRect cr = updateWorkspace();
    int x = 0;
    int y = cr.height() - w->height();

    QList<QWidget *>::Iterator it(icons.begin());
    while (it != icons.end()) {
        QWidget* i = *it;
        ++it;
        if (x > 0 && x + i->width() > cr.width()){
            x = 0;
            y -= i->height();
        }

        if (i != w &&
            i->geometry().intersects(QRect(x, y, w->width(), w->height())))
            x += i->width();
    }
    w->move(x, y);

    if (q->isVisibleTo(q->parentWidget())) {
        w->show();
        w->lower();
    }
    updateWorkspace();
}


void QWorkspacePrivate::removeIcon(QWidget* w)
{
    if (icons.removeAll(w))
        w->hide();
}


/*! \reimp  */
void QWorkspace::resizeEvent(QResizeEvent *)
{
    Q_D(QWorkspace);
    if (d->maxWindow) {
        d->maxWindow->adjustToFullscreen();
        if (d->maxWindow->windowWidget())
            d->maxWindow->windowWidget()->overrideWindowState(Qt::WindowMaximized);
    }
    d->updateWorkspace();
}

/*! \reimp */
void QWorkspace::showEvent(QShowEvent *e)
{
    Q_D(QWorkspace);
    if (d->maxWindow)
        d->showMaximizeControls();
    QWidget::showEvent(e);
    if (d->becomeActive) {
        d->activateWindow(d->becomeActive);
        d->becomeActive = 0;
    } else if (d->windows.count() > 0 && !d->active) {
        d->activateWindow(d->windows.first()->windowWidget());
    }

//     // force a frame repaint - this is a workaround for what seems to be a bug
//     // introduced when changing the QWidget::show() implementation. Might be
//     // a windows bug as well though.
//     for (int i = 0; i < d->windows.count(); ++i) {
// 	QWorkspaceChild* c = d->windows.at(i);
//         c->update(c->rect());
//     }

    d->updateWorkspace();
}

/*! \reimp */
void QWorkspace::hideEvent(QHideEvent *)
{
    Q_D(QWorkspace);
    if (!isVisible())
        d->hideMaximizeControls();
}

/*! \reimp */
void QWorkspace::paintEvent(QPaintEvent *)
{
    Q_D(QWorkspace);

    if (d->background.style() != Qt::NoBrush) {
        QPainter p(this);
        p.fillRect(0, 0, width(), height(), d->background);
    }
}

void QWorkspacePrivate::minimizeWindow(QWidget* w)
{
    QWorkspaceChild* c = findChild(w);

    if (!w || !(w->windowFlags() & Qt::WindowMinimizeButtonHint))
        return;

    if (c) {
        bool wasMax = false;
        if (c == maxWindow) {
            wasMax = true;
            maxWindow = 0;
            hideMaximizeControls();
            for (QList<QWorkspaceChild *>::Iterator it(windows.begin()); it != windows.end(); ++it) {
                QWorkspaceChild* c = *it;
                if (c->titlebar)
                    c->titlebar->setMovable(true);
                c->widgetResizeHandler->setActive(true);
            }
        }
        c->hide();
        if (wasMax)
            c->setGeometry(maxRestore);
        if (!focus.contains(c))
            focus.append(c);
        insertIcon(c->iconWidget());

        if (!maxWindow)
            activateWindow(w);

        updateWorkspace();

        w->overrideWindowState(Qt::WindowMinimized);
        c->overrideWindowState(Qt::WindowMinimized);
    }
}

void QWorkspacePrivate::normalizeWindow(QWidget* w)
{
    Q_Q(QWorkspace);
    QWorkspaceChild* c = findChild(w);
    if (!w)
        return;
    if (c) {
        w->overrideWindowState(Qt::WindowNoState);
        hideMaximizeControls();
        if (q->style()->styleHint(QStyle::SH_Workspace_FillSpaceOnMaximize, 0, q) || !maxWindow) {
            if (w->minimumSize() != w->maximumSize())
                c->widgetResizeHandler->setActive(true);
            if (c->titlebar)
                c->titlebar->setMovable(true);
        }
        w->overrideWindowState(Qt::WindowNoState);
        c->overrideWindowState(Qt::WindowNoState);

        if (c == maxWindow) {
            c->setGeometry(maxRestore);
            maxWindow = 0;
        } else {
            if (c->iconw)
                removeIcon(c->iconw->parentWidget());
            c->show();
        }

        hideMaximizeControls();
        for (QList<QWorkspaceChild *>::Iterator it(windows.begin()); it != windows.end(); ++it) {
            QWorkspaceChild* c = *it;
            if (c->titlebar)
                c->titlebar->setMovable(true);
            if (c->childWidget && c->childWidget->minimumSize() != c->childWidget->maximumSize())
                c->widgetResizeHandler->setActive(true);
        }
        activateWindow(w, true);
        updateWorkspace();
    }
}

void QWorkspacePrivate::maximizeWindow(QWidget* w)
{
    Q_Q(QWorkspace);
    QWorkspaceChild* c = findChild(w);

    if (!w || !(w->windowFlags() & Qt::WindowMaximizeButtonHint))
        return;

    if (!c || c == maxWindow)
        return;

    bool updatesEnabled = q->updatesEnabled();
    q->setUpdatesEnabled(false);

    if (c->iconw && icons.contains(c->iconw->parentWidget()))
        normalizeWindow(w);
    QRect r(c->geometry());
    QWorkspaceChild *oldMaxWindow = maxWindow;
    maxWindow = c;
    c->adjustToFullscreen();
    c->show();
    c->internalRaise();
    if (oldMaxWindow != c) {
        if (oldMaxWindow) {
            oldMaxWindow->setGeometry(maxRestore);
            oldMaxWindow->overrideWindowState(Qt::WindowNoState);
            if(oldMaxWindow->windowWidget())
                oldMaxWindow->windowWidget()->overrideWindowState(Qt::WindowNoState);
        }
        maxRestore = r;
    }

    activateWindow(w);
    showMaximizeControls();
    if(q->style()->styleHint(QStyle::SH_Workspace_FillSpaceOnMaximize, 0, q)) {
        if (!active && becomeActive) {
            active = (QWorkspaceChild*)becomeActive->parentWidget();
            active->setActive(true);
            becomeActive = 0;
            emit q->windowActivated(active->windowWidget());
        }
        c->widgetResizeHandler->setActive(false);
        if (c->titlebar)
            c->titlebar->setMovable(false);
    }
    updateWorkspace();

    w->overrideWindowState(Qt::WindowMaximized);
    c->overrideWindowState(Qt::WindowMaximized);
    q->setUpdatesEnabled(updatesEnabled);
}

void QWorkspacePrivate::showWindow(QWidget* w)
{
    if (w->isMinimized() && (w->windowFlags() & Qt::WindowMinimizeButtonHint))
        minimizeWindow(w);
    else if ((maxWindow || w->isMaximized()) && w->windowFlags() & Qt::WindowMaximizeButtonHint)
        maximizeWindow(w);
    else if (w->windowFlags() & Qt::WindowMaximizeButtonHint)
        normalizeWindow(w);
    else
        w->parentWidget()->show();
    if (maxWindow)
        maxWindow->internalRaise();
    updateWorkspace();
}


QWorkspaceChild* QWorkspacePrivate::findChild(QWidget* w)
{
    QList<QWorkspaceChild *>::Iterator it(windows.begin());
    while (it != windows.end()) {
        QWorkspaceChild* c = *it;
        ++it;
        if (c->windowWidget() == w)
            return c;
    }
    return 0;
}

/*!
    Returns a list of all visible or minimized child windows. If \a
    order is CreationOrder (the default), the windows are listed in
    the order in which they were inserted into the workspace. If \a
    order is StackingOrder, the windows are listed in their stacking
    order, with the topmost window as the last item in the list.
*/
QWidgetList QWorkspace::windowList(WindowOrder order) const
{
    Q_D(const QWorkspace);
    QWidgetList windows;
    if (order == StackingOrder) {
        QObjectList cl = children();
        for (int i = 0; i < cl.size(); ++i) {
            QWorkspaceChild *c = qobject_cast<QWorkspaceChild*>(cl.at(i));
            if (c && c->isWindowOrIconVisible())
                windows.append(c->windowWidget());
        }
    } else {
        QList<QWorkspaceChild *>::ConstIterator it(d->windows.begin());
        while (it != d->windows.end()) {
            QWorkspaceChild* c = *it;
            ++it;
            if (c && c->isWindowOrIconVisible())
                windows.append(c->windowWidget());
        }
    }
    return windows;
}


/*! \reimp */
bool QWorkspace::event(QEvent *e)
{
    Q_D(QWorkspace);
    if (e->type() == QEvent::Shortcut) {
        QShortcutEvent *se = static_cast<QShortcutEvent *>(e);
        const char *theSlot = d->shortcutMap.value(se->shortcutId(), 0);
        if (theSlot)
            QMetaObject::invokeMethod(this, theSlot);
    } else if (e->type() == QEvent::FocusIn || e->type() == QEvent::FocusOut){
        return true;
    }
    return QWidget::event(e);
}

/*! \reimp */