qworkspace.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

bool QWorkspace::eventFilter(QObject *o, QEvent * e)
{
    Q_D(QWorkspace);
    static QTime* t = 0;
    static QWorkspace* tc = 0;
    if (o == d->maxtools) {
        switch (e->type()) {
        case QEvent::MouseButtonPress:
            {
                QMenuBar* b = (QMenuBar*)o->parent();
                if (!t)
                    t = new QTime;
                if (tc != this || t->elapsed() > QApplication::doubleClickInterval()) {
                    if (isRightToLeft()) {
                        QPoint p = b->mapToGlobal(QPoint(b->x() + b->width(), b->y() + b->height()));
                        p.rx() -= d->popup->sizeHint().width();
                        d->_q_popupOperationMenu(p);
                    } else {
                        d->_q_popupOperationMenu(b->mapToGlobal(QPoint(b->x(), b->y() + b->height())));
                    }
                    t->start();
                    tc = this;
                } else {
                    tc = 0;
                    closeActiveWindow();
                }
                return true;
            }
        default:
            break;
        }
        return QWidget::eventFilter(o, e);
    }
    switch (e->type()) {
    case QEvent::HideToParent:
        break;
    case QEvent::ShowToParent:
        if (QWorkspaceChild *c = qobject_cast<QWorkspaceChild*>(o))
            if (!d->focus.contains(c))
                d->focus.append(c);
        d->updateWorkspace();
        break;
    case QEvent::WindowTitleChange:
        if (!d->inTitleChange) {
            if (o == window())
                d->topTitle = window()->windowTitle();
            if (d->maxWindow && d->maxWindow->windowWidget() && d->topTitle.size()) {
                d->inTitleChange = true;
                window()->setWindowTitle(tr("%1 - [%2]")
                                         .arg(d->topTitle).arg(d->maxWindow->windowWidget()->windowTitle()));
                d->inTitleChange = false;
            }
        }
        break;

    case QEvent::ModifiedChange:
        if (o == d->maxWindow)
            window()->setWindowModified(d->maxWindow->isWindowModified());
        break;

    case QEvent::Close:
        if (o == window())
        {
            QList<QWorkspaceChild *>::Iterator it(d->windows.begin());
            while (it != d->windows.end()) {
                QWorkspaceChild* c = *it;
                ++it;
                if (c->shademode)
                    c->showShaded();
            }
        } else if (qobject_cast<QWorkspaceChild*>(o)) {
            d->popup->hide();
        }
        d->updateWorkspace();
        break;
    default:
        break;
    }
    return QWidget::eventFilter(o, e);
}

static QMenuBar *findMenuBar(QWidget *w)
{
    // don't search recursively to avoid finding a menubar of a
    // mainwindow that happens to be a workspace window (like
    // a mainwindow in designer)
    QList<QObject *> children = w->children();
    for (int i = 0; i < children.count(); ++i) {
        QMenuBar *bar = qobject_cast<QMenuBar *>(children.at(i));
        if (bar)
            return bar;
    }
    return 0;
}

void QWorkspacePrivate::showMaximizeControls()
{
    Q_Q(QWorkspace);
    Q_ASSERT(maxWindow);

    // merge windowtitle and modified state
    if (!topTitle.size())
        topTitle = q->window()->windowTitle();

    if (maxWindow->windowWidget()) {
        QString docTitle = maxWindow->windowWidget()->windowTitle();
        if (topTitle.size() && docTitle.size()) {
            inTitleChange = true;
            q->window()->setWindowTitle(QWorkspace::tr("%1 - [%2]").arg(topTitle).arg(docTitle));
            inTitleChange = false;
        }
        q->window()->setWindowModified(maxWindow->windowWidget()->isWindowModified());
    }
    
    if (!q->style()->styleHint(QStyle::SH_Workspace_FillSpaceOnMaximize, 0, q)) {
        QMenuBar* b = 0;

        // Do a breadth-first search first on every parent,
        QWidget* w = q->parentWidget();
        while (w) {
            b = findMenuBar(w);
            if (b)
                break;
            w = w->parentWidget();
        }

        // last attempt.
        if (!b)
            b = findMenuBar(q->window());

        if (!b)
            return;

        if (!maxcontrols) {
            maxmenubar = b;
            maxcontrols = new QFrame(q->window());
            maxcontrols->setObjectName(QLatin1String("qt_maxcontrols"));
            QHBoxLayout* l = new QHBoxLayout(maxcontrols);
            l->setMargin(maxcontrols->frameWidth());
            l->setSpacing(0);
            if (maxWindow->windowWidget() &&
                (maxWindow->windowWidget()->windowFlags() & Qt::WindowMinimizeButtonHint)) {
                QToolButton* iconB = new QToolButton(maxcontrols);
                iconB->setObjectName(QLatin1String("iconify"));
#ifndef QT_NO_TOOLTIP
                iconB->setToolTip(QWorkspace::tr("Minimize"));
#endif
                l->addWidget(iconB);
                iconB->setFocusPolicy(Qt::NoFocus);
                QPixmap pm = q->style()->standardPixmap(QStyle::SP_TitleBarMinButton);
                iconB->setIcon(pm);
                iconB->setIconSize(pm.size());
                QObject::connect(iconB, SIGNAL(clicked()),
                                 q, SLOT(_q_minimizeActiveWindow()));
            }

            QToolButton* restoreB = new QToolButton(maxcontrols);
            restoreB->setObjectName(QLatin1String("restore"));
#ifndef QT_NO_TOOLTIP
            restoreB->setToolTip(QWorkspace::tr("Restore Down"));
#endif
            l->addWidget(restoreB);
            restoreB->setFocusPolicy(Qt::NoFocus);
            QPixmap pm = q->style()->standardPixmap(QStyle::SP_TitleBarNormalButton);
            restoreB->setIcon(pm);
            restoreB->setIconSize(pm.size());
            QObject::connect(restoreB, SIGNAL(clicked()),
                             q, SLOT(_q_normalizeActiveWindow()));

            l->addSpacing(2);
            QToolButton* closeB = new QToolButton(maxcontrols);
            closeB->setObjectName(QLatin1String("close"));
#ifndef QT_NO_TOOLTIP
            closeB->setToolTip(QWorkspace::tr("Close"));
#endif
            l->addWidget(closeB);
            closeB->setFocusPolicy(Qt::NoFocus);
            pm = q->style()->standardPixmap(QStyle::SP_TitleBarCloseButton);
            closeB->setIcon(pm);
            closeB->setIconSize(pm.size());
            QObject::connect(closeB, SIGNAL(clicked()),
                             q, SLOT(closeActiveWindow()));

            maxcontrols->setFixedSize(maxcontrols->minimumSizeHint());
        }

        b->setCornerWidget(maxcontrols);
        maxcontrols->show();
        if (!active && becomeActive) {
            active = (QWorkspaceChild*)becomeActive->parentWidget();
            active->setActive(true);
            becomeActive = 0;
            emit q->windowActivated(active->windowWidget());
        }
        if (active) {
            if (!maxtools) {
                maxtools = new QLabel(q->window());
                maxtools->setObjectName(QLatin1String("qt_maxtools"));
                maxtools->installEventFilter(q);
            }
            if (active->windowWidget() && !active->windowWidget()->windowIcon().isNull()) {
                QIcon icon = active->windowWidget()->windowIcon();
                int iconSize = maxcontrols->size().height();
                maxtools->setPixmap(icon.pixmap(QSize(iconSize, iconSize)));
            } else {
                QPixmap pm = q->style()->standardPixmap(QStyle::SP_TitleBarMenuButton);
                if (pm.isNull()) {
                    pm = QPixmap(14,14);
                    pm.fill(Qt::black);
                }
                maxtools->setPixmap(pm);
            }
            b->setCornerWidget(maxtools, Qt::TopLeftCorner);
            maxtools->show();
        }
    }
}


void QWorkspacePrivate::hideMaximizeControls()
{
    Q_Q(QWorkspace);
    if (!q->style()->styleHint(QStyle::SH_Workspace_FillSpaceOnMaximize, 0, q)) {
        if (maxmenubar) {
            maxmenubar->setCornerWidget(0, Qt::TopLeftCorner);
            maxmenubar->setCornerWidget(0, Qt::TopRightCorner);
        }
        delete maxcontrols;
        maxcontrols = 0;
        delete maxtools;
        maxtools = 0;
    }

    //unmerge the titlebar/modification state
    if (topTitle.size()) {
        inTitleChange = true;
        q->window()->setWindowTitle(topTitle);
        inTitleChange = false;
    }
    q->window()->setWindowModified(false);
}

/*!
    Closes the child window that is currently active.

    \sa closeAllWindows()
*/
void QWorkspace::closeActiveWindow()
{
    Q_D(QWorkspace);
    if (d->maxWindow && d->maxWindow->windowWidget())
        d->maxWindow->windowWidget()->close();
    else if (d->active && d->active->windowWidget())
        d->active->windowWidget()->close();
    d->updateWorkspace();
}

/*!
    Closes all child windows.

    If any child window fails to accept the close event, the remaining windows
    will remain open.

    \sa closeActiveWindow()
*/
void QWorkspace::closeAllWindows()
{
    Q_D(QWorkspace);
    bool did_close = true;
    QList<QWorkspaceChild *>::const_iterator it = d->windows.constBegin();
    while (it != d->windows.constEnd() && did_close) {
        QWorkspaceChild *c = *it;
        ++it;
        if (c->windowWidget() && !c->windowWidget()->isHidden())
            did_close = c->windowWidget()->close();
    }
}

void QWorkspacePrivate::_q_normalizeActiveWindow()
{
    if (maxWindow)
        maxWindow->showNormal();
    else if (active)
        active->showNormal();
}

void QWorkspacePrivate::_q_minimizeActiveWindow()
{
    if (maxWindow)
        maxWindow->showMinimized();
    else if (active)
        active->showMinimized();
}

void QWorkspacePrivate::_q_showOperationMenu()
{
    Q_Q(QWorkspace);
    if  (!active || !active->windowWidget())
        return;
    Q_ASSERT((active->windowWidget()->windowFlags() & Qt::WindowSystemMenuHint));
    QPoint p;
    QMenu *popup = active->titlebar->isTool() ? toolPopup : this->popup;
    if (q->isRightToLeft()) {
        p = QPoint(active->windowWidget()->mapToGlobal(QPoint(active->windowWidget()->width(),0)));
        p.rx() -= popup->sizeHint().width();
    } else {
        p = QPoint(active->windowWidget()->mapToGlobal(QPoint(0,0)));
    }
    if (!active->isVisible()) {
        p = active->iconWidget()->mapToGlobal(QPoint(0,0));
        p.ry() -= popup->sizeHint().height();
    }
    _q_popupOperationMenu(p);
}

void QWorkspacePrivate::_q_popupOperationMenu(const QPoint&  p)
{
    if (!active || !active->windowWidget() || !(active->windowWidget()->windowFlags() & Qt::WindowSystemMenuHint))
        return;
    if ((active->titlebar->isTool()))
        toolPopup->popup(p);
    else
        popup->popup(p);
}

void QWorkspacePrivate::_q_updateActions()
{
    Q_Q(QWorkspace);
    for (int i = 1; i < NCountAct-1; i++) {
        bool enable = active != 0;
        actions[i]->setEnabled(enable);
    }

    if (!active || !active->windowWidget())
        return;

    QWidget *windowWidget = active->windowWidget();
    bool canResize = windowWidget->maximumSize() != windowWidget->minimumSize();
    actions[QWorkspacePrivate::ResizeAct]->setEnabled(canResize);
    actions[QWorkspacePrivate::MinimizeAct]->setEnabled((windowWidget->windowFlags() & Qt::WindowMinimizeButtonHint));
    actions[QWorkspacePrivate::MaximizeAct]->setEnabled((windowWidget->windowFlags() & Qt::WindowMaximizeButtonHint) && canResize);

    if (active == maxWindow) {
        actions[QWorkspacePrivate::MoveAct]->setEnabled(false);
        actions[QWorkspacePrivate::ResizeAct]->setEnabled(false);
        actions[QWorkspacePrivate::MaximizeAct]->setEnabled(false);
        actions[QWorkspacePrivate::RestoreAct]->setEnabled(true);
    } else if (active->isVisible()){
        actions[QWorkspacePrivate::RestoreAct]->setEnabled(false);
    } else {
        actions[QWorkspacePrivate::MoveAct]->setEnabled(false);
        actions[QWorkspacePrivate::ResizeAct]->setEnabled(false);
        actions[QWorkspacePrivate::MinimizeAct]->setEnabled(false);
        actions[QWorkspacePrivate::RestoreAct]->setEnabled(true);
    }
    if (active->shademode) {
        actions[QWorkspacePrivate::ShadeAct]->setIcon(
            QIcon(q->style()->standardPixmap(QStyle::SP_TitleBarUnshadeButton)));
        actions[QWorkspacePrivate::ShadeAct]->setText(QWorkspace::tr("&Unshade"));
    } else {
        actions[QWorkspacePrivate::ShadeAct]->setIcon(
            QIcon(q->style()->standardPixmap(QStyle::SP_TitleBarShadeButton)));
        actions[QWorkspacePrivate::ShadeAct]->setText(QWorkspace::tr("Sh&ade"));
    }
    actions[QWorkspacePrivate::StaysOnTopAct]->setEnabled(!active->shademode && canResize);
    actions[QWorkspacePrivate::StaysOnTopAct]->setChecked(
        (active->windowWidget()->windowFlags() & Qt::WindowStaysOnTopHint));
}

void QWorkspacePrivate::_q_operationMenuActivated(QAction *action)
{
    if (!active)
        return;
    if(action == actions[QWorkspacePrivate::RestoreAct]) {
        active->showNormal();
    } else if(action == actions[QWorkspacePrivate::MoveAct]) {
        active->doMove();
    } else if(action == actions[QWorkspacePrivate::ResizeAct]) {
        if (active->shademode)
            active->showShaded();
        active->doResize();
    } else if(action == actions[QWorkspacePrivate::MinimizeAct]) {
        active->showMinimized();
    } else if(action == actions[QWorkspacePrivate::MaximizeAct]) {
        active->showMaximized();
    } else if(action == actions[QWorkspacePrivate::ShadeAct]) {
        active->showShaded();
    } else if(action == actions[QWorkspacePrivate::StaysOnTopAct]) {
        if(QWidget* w = active->windowWidget()) {
            if ((w->windowFlags() & Qt::WindowStaysOnTopHint)) {
                w->overrideWindowFlags(w->windowFlags() & ~Qt::WindowStaysOnTopHint);
            } else {
                w->overrideWindowFlags(w->windowFlags() | Qt::WindowStaysOnTopHint);
                w->parentWidget()->raise();
            }
        }
    }
}


void QWorkspacePrivate::hideChild(QWorkspaceChild *c)
{
    Q_Q(QWorkspace);

//     bool updatesEnabled = q->updatesEnabled();
//     q->setUpdatesEnabled(false);
    focus.removeAll(c);
    QRect restore;
    if (maxWindow == c)
        restore = maxRestore;
    if (active == c) {
        q->setFocus();
        q->activatePr