q3dockarea.cpp

奇趣公司比较新的qt/emd版本

/*!
    Removes the dock window \a w from the dock area. If \a
    makeFloating is true, \a w gets floated, and if \a swap is true,
    the orientation of \a w gets swapped. If \a fixNewLines is true
    (the default) newlines in the area will be fixed.

    You should never need to call this function yourself. Use
    Q3DockWindow::dock() and Q3DockWindow::undock() instead.
*/

void Q3DockArea::removeDockWindow(Q3DockWindow *w, bool makeFloating, bool swap, bool fixNewLines)
{
    w->removeEventFilter(this);
    Q3DockWindow *dockWindow = 0;
    int i = findDockWindow(w);
    if (i == -1)
        return;
    dockWindow = dockWindows.at(i);
    dockWindows.removeAt(i);
    QList<Q3DockWindow *> lineStarts = layout->lineStarts();
    if (fixNewLines && lineStarts.contains(dockWindow) && i < dockWindows.count())
        dockWindows.at(i)->setNewLine(true);
    if (makeFloating) {
        QWidget *p = parentWidget() ? parentWidget() : window();
        dockWindow->setParent(p, Qt::WType_Dialog | Qt::WStyle_Customize | Qt::WStyle_NoBorder | Qt::WStyle_Tool);
        dockWindow->move(0, 0);
    }
    if (swap)
        dockWindow->resize(dockWindow->height(), dockWindow->width());
    updateLayout();
    if (dockWindows.isEmpty())
        setSizePolicy(QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred));
}

int Q3DockArea::findDockWindow(Q3DockWindow *w)
{
    return dockWindows.indexOf(w);
}

void Q3DockArea::updateLayout()
{
    layout->invalidate();
    layout->activate();
}

/*! \reimp
 */

bool Q3DockArea::eventFilter(QObject *o, QEvent *e)
{
    if (e->type() == QEvent::Close) {
        if (qobject_cast<Q3DockWindow*>(o)) {
            o->removeEventFilter(this);
            QApplication::sendEvent(o, e);
            if (((QCloseEvent*)e)->isAccepted())
                removeDockWindow((Q3DockWindow*)o, false, false);
            return true;
        }
    }
    return false;
}

/*! \internal

    Invalidates the offset of the next dock window in the dock area.
 */

void Q3DockArea::invalidNextOffset(Q3DockWindow *dw)
{
    int i = dockWindows.indexOf(dw);
    if (i == -1 || i >= (int)dockWindows.count() - 1)
        return;
    if ((dw = dockWindows.at(++i)))
        dw->setOffset(0);
}

/*!
    \property Q3DockArea::count
    \brief the number of dock windows in the dock area
*/
int Q3DockArea::count() const
{
    return dockWindows.count();
}

/*!
    \property Q3DockArea::empty
    \brief whether the dock area is empty
*/

bool Q3DockArea::isEmpty() const
{
    return dockWindows.isEmpty();
}


/*!
    Returns a list of the dock windows in the dock area.
*/

QList<Q3DockWindow *> Q3DockArea::dockWindowList() const
{
    return dockWindows;
}

/*!
    Lines up the dock windows in this dock area to minimize wasted
    space. If \a keepNewLines is true, only space within lines is
    cleaned up. If \a keepNewLines is false the number of lines might
    be changed.
*/

void Q3DockArea::lineUp(bool keepNewLines)
{
    for (int i = 0; i < dockWindows.size(); ++i) {
        Q3DockWindow *dw = dockWindows.at(i);
        dw->setOffset(0);
        if (!keepNewLines)
            dw->setNewLine(false);
    }
    layout->activate();
}

Q3DockArea::DockWindowData *Q3DockArea::dockWindowData(Q3DockWindow *w)
{
    DockWindowData *data = new DockWindowData;
    data->index = findDockWindow(w);
    if (data->index == -1) {
        delete data;
        return 0;
    }
    QList<Q3DockWindow *> lineStarts = layout->lineStarts();
    int i = -1;
    for (int j = 0; j < dockWindows.size(); ++j) {
        Q3DockWindow *dw = dockWindows.at(j);
        if (lineStarts.contains(dw))
            ++i;
        if (dw == w)
            break;
    }
    data->line = i;
    data->offset = point_pos(QPoint(fix_x(w), w->y()), orientation());
    data->area = this;
    data->fixedExtent = w->fixedExtent();
    return data;
}

void Q3DockArea::dockWindow(Q3DockWindow *dockWindow, DockWindowData *data)
{
    if (!data)
        return;

    dockWindow->setParent(this);
    dockWindow->move(0, 0);

    dockWindow->installEventFilter(this);
    dockWindow->dockArea = this;
    dockWindow->updateGui();

    if (dockWindows.isEmpty()) {
        dockWindows.append(dockWindow);
    } else {
        QList<Q3DockWindow *> lineStarts = layout->lineStarts();
        int index = 0;
        if (lineStarts.count() > data->line)
            index = dockWindows.indexOf(lineStarts.at(data->line));
        if (index == -1)
            index = 0;
        bool firstTime = true;
        int offset = data->offset;
        for (int i = index; i < dockWindows.size(); ++i) {
            Q3DockWindow *dw = dockWindows.at(i);
            if (!firstTime && lineStarts.contains(dw))
                break;
            if (offset <
                 point_pos(fix_pos(dw), orientation()) + size_extent(dw->size(), orientation()) / 2)
                break;
            index++;
            firstTime = false;
        }
        if (index >= 0 && index < dockWindows.count() &&
             dockWindows.at(index)->newLine() && lineOf(index) == data->line) {
            dockWindows.at(index)->setNewLine(false);
            dockWindow->setNewLine(true);
        } else {
            dockWindow->setNewLine(false);
        }

        dockWindows.insert(index, dockWindow);
    }
    dockWindow->show();

    dockWindow->setFixedExtentWidth(data->fixedExtent.width());
    dockWindow->setFixedExtentHeight(data->fixedExtent.height());

    updateLayout();
    setSizePolicy(QSizePolicy(orientation() == Qt::Horizontal ? QSizePolicy::Expanding : QSizePolicy::Minimum,
                                orientation() == Qt::Vertical ? QSizePolicy::Expanding : QSizePolicy::Minimum));

}

/*!
    Returns true if dock window \a dw could be docked into the dock
    area; otherwise returns false.

    \sa setAcceptDockWindow()
*/

bool Q3DockArea::isDockWindowAccepted(Q3DockWindow *dw)
{
    if (!dw)
        return false;
    if (forbiddenWidgets.contains(dw))
        return false;

    Q3MainWindow *mw = qobject_cast<Q3MainWindow*>(parentWidget());
    if (!mw)
        return true;
    if (!mw->hasDockWindow(dw))
        return false;
    if (!mw->isDockEnabled(this))
        return false;
    if (!mw->isDockEnabled(dw, this))
        return false;
    return true;
}

/*!
    If \a accept is true, dock window \a dw can be docked in the dock
    area. If \a accept is false, dock window \a dw cannot be docked in
    the dock area.

    \sa isDockWindowAccepted()
*/

void Q3DockArea::setAcceptDockWindow(Q3DockWindow *dw, bool accept)
{
    if (accept)
        forbiddenWidgets.removeAll(dw);
    else if (forbiddenWidgets.contains(dw))
        forbiddenWidgets.append(dw);
}

void Q3DockArea::invalidateFixedSizes()
{
    for (int i = 0; i < dockWindows.size(); ++i) {
        Q3DockWindow *dw = dockWindows.at(i);
        if (orientation() == Qt::Horizontal)
            dw->setFixedExtentWidth(-1);
        else
            dw->setFixedExtentHeight(-1);
    }
}

int Q3DockArea::maxSpace(int hint, Q3DockWindow *dw)
{
    int index = findDockWindow(dw);
    if (index == -1 || index + 1 >= (int)dockWindows.count()) {
        if (orientation() == Qt::Horizontal)
            return dw->width();
        return dw->height();
    }

    Q3DockWindow *w = 0;
    int i = 0;
    do {
        w = dockWindows.at(index + (++i));
    } while (i + 1 < (int)dockWindows.count() && (!w || w->isHidden()));
    if (!w || !w->isResizeEnabled() || i >= (int)dockWindows.count()) {
        if (orientation() == Qt::Horizontal)
            return dw->width();
        return dw->height();
    }
    int min = 0;
    Q3ToolBar *tb = qobject_cast<Q3ToolBar*>(w);
    if (orientation() == Qt::Horizontal) {
        w->setFixedExtentWidth(-1);
        if (!tb)
            min = qMax(w->minimumSize().width(), w->minimumSizeHint().width());
        else
            min = w->sizeHint().width();
    } else {
        w->setFixedExtentHeight(-1);
        if (!tb)
            min = qMax(w->minimumSize().height(), w->minimumSizeHint().height());
        else
            min = w->sizeHint().height();
    }

    int diff = hint - (orientation() == Qt::Horizontal ? dw->width() : dw->height());

    if ((orientation() == Qt::Horizontal ? w->width() : w->height()) - diff < min)
        hint = (orientation() == Qt::Horizontal ? dw->width() : dw->height()) + (orientation() == Qt::Horizontal ? w->width() : w->height()) - min;

    diff = hint - (orientation() == Qt::Horizontal ? dw->width() : dw->height());
    if (orientation() == Qt::Horizontal)
        w->setFixedExtentWidth(w->width() - diff);
    else
        w->setFixedExtentHeight(w->height() - diff);
    return hint;
}

void Q3DockArea::setFixedExtent(int d, Q3DockWindow *dw)
{
    QList<Q3DockWindow *> lst;
    for (int i = 0; i < dockWindows.size(); ++i) {
        Q3DockWindow *w = dockWindows.at(i);
        if (w->isHidden())
            continue;
        if (orientation() == Qt::Horizontal) {
            if (dw->y() != w->y())
                continue;
        } else {
            if (dw->x() != w->x())
                continue;
        }
        if (orientation() == Qt::Horizontal)
            d = qMax(d, w->minimumHeight());
        else
            d = qMax(d, w->minimumWidth());
        if (w->isResizeEnabled())
            lst.append(w);
    }
    for (int i = 0; i < lst.size(); ++i) {
        Q3DockWindow *w = lst.at(i);
        if (orientation() == Qt::Horizontal)
            w->setFixedExtentHeight(d);
        else
            w->setFixedExtentWidth(d);
    }
}

bool Q3DockArea::isLastDockWindow(Q3DockWindow *dw)
{
    int i = dockWindows.indexOf(dw);
    if (i == -1 || i >= (int)dockWindows.count() - 1)
        return true;
    Q3DockWindow *w = 0;
    if ((w = dockWindows.at(++i))) {
        if (orientation() == Qt::Horizontal && dw->y() < w->y())
            return true;
        if (orientation() == Qt::Vertical && dw->x() < w->x())
            return true;
    } else {
        return true;
    }
    return false;
}

#ifndef QT_NO_TEXTSTREAM

/*!
    \relates Q3DockArea

    Writes the layout of the dock windows in dock area \a dockArea to
    the text stream \a ts.
*/

QTextStream &operator<<(QTextStream &ts, const Q3DockArea &dockArea)
{
    QString str;
    QList<Q3DockWindow *> l = dockArea.dockWindowList();

    for (int i = 0; i < l.size(); ++i) {
        Q3DockWindow *dw = l.at(i);
        str += QLatin1Char('[') + QString(dw->windowTitle()) + QLatin1Char(',') + QString::number((int)dw->offset()) +
               QLatin1Char(',') + QString::number((int)dw->newLine()) + QLatin1Char(',') + QString::number(dw->fixedExtent().width()) +
               QLatin1Char(',') + QString::number(dw->fixedExtent().height()) + QLatin1Char(',') + QString::number((int)!dw->isHidden()) + QLatin1Char(']');
    }
    ts << str << endl;

    return ts;
}

/*!
    \relates Q3DockArea

    Reads the layout description of the dock windows in dock area \a
    dockArea from the text stream \a ts and restores it. The layout
    description must have been previously written by the operator<<()
    function.
*/

QTextStream &operator>>(QTextStream &ts, Q3DockArea &dockArea)
{
    QString s = ts.readLine();

    QString name, offset, newLine, width, height, visible;

    enum State { Pre, Name, Offset, NewLine, Width, Height, Visible, Post };
    int state = Pre;
    QChar c;
    QList<Q3DockWindow *> l = dockArea.dockWindowList();

    for (int i = 0; i < s.length(); ++i) {
        c = s[i];
        if (state == Pre && c == QLatin1Char('[')) {
            state++;
            continue;
        }
        if (c == QLatin1Char(',') &&
             (state == Name || state == Offset || state == NewLine || state == Width || state == Height)) {
            state++;
            continue;
        }
        if (state == Visible && c == QLatin1Char(']')) {
            for (int j = 0; j < l.size(); ++j) {
                Q3DockWindow *dw = l.at(j);
                if (QString(dw->windowTitle()) == name) {
                    dw->setNewLine((bool)newLine.toInt());
                    dw->setOffset(offset.toInt());
                    dw->setFixedExtentWidth(width.toInt());
                    dw->setFixedExtentHeight(height.toInt());
                    if (!(bool)visible.toInt())
                        dw->hide();
                    else
                        dw->show();
                    break;
                }
            }

            name = offset = newLine = width = height = visible = QLatin1String("");

            state = Pre;
            continue;
        }
        if (state == Name)
            name += c;
        else if (state == Offset)
            offset += c;
        else if (state == NewLine)
            newLine += c;
        else if (state == Width)
            width += c;
        else if (state == Height)
            height += c;
        else if (state == Visible)
            visible += c;
    }

    dockArea.QWidget::layout()->invalidate();
    dockArea.QWidget::layout()->activate();
    return ts;
}
#endif

#endif //QT_NO_MAINWINDOW