qdialog.cpp

奇趣公司比较新的qt/emd版本

#ifdef Q_WS_X11
    // if the WM advertises that it will place the windows properly for us, let it do it :)
    if (X11->isSupportedByWM(ATOM(_NET_WM_FULL_PLACEMENT)))
        return;
#endif

    QPoint p(0, 0);
    int extraw = 0, extrah = 0, scrn = 0;
    if (w)
        w = w->window();
    QRect desk;
    if (w) {
        scrn = QApplication::desktop()->screenNumber(w);
    } else if (QApplication::desktop()->isVirtualDesktop()) {
        scrn = QApplication::desktop()->screenNumber(QCursor::pos());
    } else {
        scrn = QApplication::desktop()->screenNumber(this);
    }
    desk = QApplication::desktop()->availableGeometry(scrn);

    QWidgetList list = QApplication::topLevelWidgets();
    for (int i = 0; (extraw == 0 || extrah == 0) && i < list.size(); ++i) {
        QWidget * current = list.at(i);
        if (current->isVisible()) {
            int framew = current->geometry().x() - current->x();
            int frameh = current->geometry().y() - current->y();

            extraw = qMax(extraw, framew);
            extrah = qMax(extrah, frameh);
        }
    }

    // sanity check for decoration frames. With embedding, we
    // might get extraordinary values
    if (extraw == 0 || extrah == 0 || extraw >= 10 || extrah >= 40) {
        extrah = 40;
        extraw = 10;
    }

#ifndef Q_OS_TEMP
    if (w) {
        // Use mapToGlobal rather than geometry() in case w might
        // be embedded in another application
        QPoint pp = w->mapToGlobal(QPoint(0,0));
        p = QPoint(pp.x() + w->width()/2,
                    pp.y() + w->height()/ 2);
    } else {
        // p = middle of the desktop
        p = QPoint(desk.x() + desk.width()/2, desk.y() + desk.height()/2);
    }
#else
    p = QPoint(desk.x() + desk.width()/2, desk.y() + desk.height()/2);
#endif

    // p = origin of this
    p = QPoint(p.x()-width()/2 - extraw,
                p.y()-height()/2 - extrah);


    if (p.x() + extraw + width() > desk.x() + desk.width())
        p.setX(desk.x() + desk.width() - width() - extraw);
    if (p.x() < desk.x())
        p.setX(desk.x());

    if (p.y() + extrah + height() > desk.y() + desk.height())
        p.setY(desk.y() + desk.height() - height() - extrah);
    if (p.y() < desk.y())
        p.setY(desk.y());

    move(p);
}


/*!
    \obsolete

    If \a orientation is Qt::Horizontal, the extension will be displayed
    to the right of the dialog's main area. If \a orientation is
    Qt::Vertical, the extension will be displayed below the dialog's main
    area.

    Instead of using this functionality, we recommend that you simply call
    show() or hide() on the part of the dialog that you want to use as an
    extension. See the \l{Extension Example} for details.

    \sa setExtension()
*/
void QDialog::setOrientation(Qt::Orientation orientation)
{
    Q_D(QDialog);
    d->orientation = orientation;
}

/*!
    \obsolete

    Returns the dialog's extension orientation.

    Instead of using this functionality, we recommend that you simply call
    show() or hide() on the part of the dialog that you want to use as an
    extension. See the \l{Extension Example} for details.

    \sa extension()
*/
Qt::Orientation QDialog::orientation() const
{
    Q_D(const QDialog);
    return d->orientation;
}

/*!
    \obsolete

    Sets the widget, \a extension, to be the dialog's extension,
    deleting any previous extension. The dialog takes ownership of the
    extension. Note that if 0 is passed any existing extension will be
    deleted. This function must only be called while the dialog is hidden.

    Instead of using this functionality, we recommend that you simply call
    show() or hide() on the part of the dialog that you want to use as an
    extension. See the \l{Extension Example} for details.

    \sa showExtension(), setOrientation()
*/
void QDialog::setExtension(QWidget* extension)
{
    Q_D(QDialog);
    delete d->extension;
    d->extension = extension;

    if (!extension)
        return;

    if (extension->parentWidget() != this)
        extension->setParent(this);
    extension->hide();
}

/*!
    \obsolete

    Returns the dialog's extension or 0 if no extension has been
    defined.

    Instead of using this functionality, we recommend that you simply call
    show() or hide() on the part of the dialog that you want to use as an
    extension. See the \l{Extension Example} for details.

    \sa showExtension(), setOrientation()
*/
QWidget* QDialog::extension() const
{
    Q_D(const QDialog);
    return d->extension;
}


/*!
    \obsolete

    If \a showIt is true, the dialog's extension is shown; otherwise the
    extension is hidden.

    Instead of using this functionality, we recommend that you simply call
    show() or hide() on the part of the dialog that you want to use as an
    extension. See the \l{Extension Example} for details.

    \sa show(), setExtension(), setOrientation()
*/
void QDialog::showExtension(bool showIt)
{
    Q_D(QDialog);
    d->doShowExtension = showIt;
    if (!d->extension)
        return;
    if (!testAttribute(Qt::WA_WState_Visible))
        return;
    if (d->extension->isVisible() == showIt)
        return;

    if (showIt) {
        d->size = size();
        d->min = minimumSize();
        d->max = maximumSize();
        if (layout())
            layout()->setEnabled(false);
        QSize s(d->extension->sizeHint()
                 .expandedTo(d->extension->minimumSize())
                 .boundedTo(d->extension->maximumSize()));
        if (d->orientation == Qt::Horizontal) {
            int h = qMax(height(), s.height());
            d->extension->setGeometry(width(), 0, s.width(), h);
            setFixedSize(width() + s.width(), h);
        } else {
            int w = qMax(width(), s.width());
            d->extension->setGeometry(0, height(), w, s.height());
            setFixedSize(w, height() + s.height());
        }
        d->extension->show();
#ifndef QT_NO_SIZEGRIP
        const bool sizeGripEnabled = isSizeGripEnabled();
        setSizeGripEnabled(false);
        d->sizeGripEnabled = sizeGripEnabled;
#endif
    } else {
        d->extension->hide();
        // workaround for CDE window manager that won't shrink with (-1,-1)
        setMinimumSize(d->min.expandedTo(QSize(1, 1)));
        setMaximumSize(d->max);
        resize(d->size);
        if (layout())
            layout()->setEnabled(true);
#ifndef QT_NO_SIZEGRIP
        setSizeGripEnabled(d->sizeGripEnabled);
#endif
    }
}


/*! \reimp */
QSize QDialog::sizeHint() const
{
    Q_D(const QDialog);
    if (d->extension)
        if (d->orientation == Qt::Horizontal)
            return QSize(QWidget::sizeHint().width(),
                        qMax(QWidget::sizeHint().height(),d->extension->sizeHint().height()));
        else
            return QSize(qMax(QWidget::sizeHint().width(), d->extension->sizeHint().width()),
                        QWidget::sizeHint().height());

    return QWidget::sizeHint();
}


/*! \reimp */
QSize QDialog::minimumSizeHint() const
{
    Q_D(const QDialog);
    if (d->extension)
        if (d->orientation == Qt::Horizontal)
            return QSize(QWidget::minimumSizeHint().width(),
                        qMax(QWidget::minimumSizeHint().height(), d->extension->minimumSizeHint().height()));
        else
            return QSize(qMax(QWidget::minimumSizeHint().width(), d->extension->minimumSizeHint().width()),
                        QWidget::minimumSizeHint().height());

    return QWidget::minimumSizeHint();
}

/*!
    \property QDialog::modal
    \brief whether show() should pop up the dialog as modal or modeless

    By default, this property is false and show() pops up the dialog
    as modeless. Setting his property to true is equivalent to setting
    QWidget::windowModality to Qt::ApplicationModal.

    exec() ignores the value of this property and always pops up the
    dialog as modal.

    \sa QWidget::windowModality, show(), exec()
*/

void QDialog::setModal(bool modal)
{
    setAttribute(Qt::WA_ShowModal, modal);
}


bool QDialog::isSizeGripEnabled() const
{
#ifndef QT_NO_SIZEGRIP
    Q_D(const QDialog);
    return !!d->resizer;
#else
    return false;
#endif
}


void QDialog::setSizeGripEnabled(bool enabled)
{
#ifdef QT_NO_SIZEGRIP
    Q_UNUSED(enabled);
#else
    Q_D(QDialog);
#ifndef QT_NO_SIZEGRIP
    d->sizeGripEnabled = enabled;
    if (enabled && d->doShowExtension)
        return;
#endif
    if (!enabled != !d->resizer) {
        if (enabled) {
            d->resizer = new QSizeGrip(this);
            // adjustSize() processes all events, which is suboptimal
            d->resizer->resize(d->resizer->sizeHint());
            if (isRightToLeft())
                d->resizer->move(rect().bottomLeft() -d->resizer->rect().bottomLeft());
            else
                d->resizer->move(rect().bottomRight() -d->resizer->rect().bottomRight());
            d->resizer->lower();
            d->resizer->show();
        } else {
            delete d->resizer;
            d->resizer = 0;
        }
    }
#endif //QT_NO_SIZEGRIP
}



/*! \reimp */
void QDialog::resizeEvent(QResizeEvent *)
{
#ifndef QT_NO_SIZEGRIP
    Q_D(QDialog);
    if (d->resizer) {
        if (isRightToLeft())
            d->resizer->move(rect().bottomLeft() -d->resizer->rect().bottomLeft());
        else
            d->resizer->move(rect().bottomRight() -d->resizer->rect().bottomRight());
        d->resizer->lower();
    }
#endif
}

/*! \fn void QDialog::finished(int result)
    \since 4.1

    This signal is emitted when the dialog's \a result code has been
    set, either by the user or by calling done(), accept(), or
    reject().

    Note that this signal is \e not emitted when hiding the dialog
    with hide() or setVisible(false). This includes deleting the
    dialog while it is visible.

    \sa accepted(), rejected()
*/

/*! \fn void QDialog::accepted()
    \since 4.1

    This signal is emitted when the dialog has been accepted either by
    the user or by calling accept() or done() with the
    QDialog::Accepted argument.

    Note that this signal is \e not emitted when hiding the dialog
    with hide() or setVisible(false). This includes deleting the
    dialog while it is visible.

    \sa finished(), rejected()
*/

/*! \fn void QDialog::rejected()
    \since 4.1

    This signal is emitted when the dialog has been rejected either by
    the user or by calling reject() or done() with the
    QDialog::Rejected argument.

    Note that this signal is \e not emitted when hiding the dialog
    with hide() or setVisible(false). This includes deleting the
    dialog while it is visible.

    \sa finished(), accepted()
*/