C++ QClipboardData::setSource方法代码示例

void QClipboard::setMimeData(QMimeData* src, Mode mode)
{
    if (mode != Clipboard) return;

    QClipboardData *d = clipboardData();

    /* Propagate text data to other QWSClients */

    QString newText;
    if( src != 0 )
	newText = src->text();
    QString oldText;
    if( d->source() != 0 )
	oldText = d->source()->text();

    d->setSource(src);

    if( oldText != newText ) {
	if( d->source() == 0 ) {
	    qwsSetClipboardText( QString() );
	} else {
	    qwsSetClipboardText( d->source()->text() );
	}
    }

    emitChanged(QClipboard::Clipboard);
}

const QMimeData* QClipboard::mimeData(Mode mode) const
{
    QClipboardData *d = 0;
    switch (mode) {
    case Selection:
        d = selectionData();
        break;
    case Clipboard:
        d = clipboardData();
        break;
    default:
        qWarning("QClipboard::mimeData: unsupported mode '%d'", mode);
        return 0;
    }

    if (! d->source() && ! timer_event_clear) {
        if (mode == Selection) {
            if (! selection_watcher)
                selection_watcher = new QClipboardWatcher(mode);
            d->setSource(selection_watcher);
        } else {
            if (! clipboard_watcher)
                clipboard_watcher = new QClipboardWatcher(mode);
            d->setSource(clipboard_watcher);
        }

        if (! timer_id) {
            // start a zero timer - we will clear cached data when the timer
            // times out, which will be the next time we hit the event loop...
            // that way, the data is cached long enough for calls within a single
            // loop/function, but the data doesn't linger around in case the selection
            // changes
            QClipboard *that = ((QClipboard *) this);
            timer_id = that->startTimer(0);
        }
    }

    return d->source();
}

const QMimeData* QClipboard::mimeData(Mode mode) const
{
    if (mode != Clipboard) return 0;

    QClipboardData *d = clipboardData();
    // Try and get data from QWSProperty if no mime data has been set on us.
    if( !d->source() ) {
	QString t = qwsClipboardText();
	if( !t.isEmpty() ) {
	    QMimeData* nd = new QMimeData;
	    nd->setText( t );
	    d->setSource( nd );
	}
    }
    return d->source();
}

bool QClipboard::event(QEvent *e)
{
    static bool recursionWatch = false;
    if (e->type() != QEvent::Clipboard || recursionWatch)
        return QObject::event(e);

    recursionWatch = true;
    QWSPropertyNotifyEvent *event = (QWSPropertyNotifyEvent *)(((QClipboardEvent *)e)->data());
    if (event && event->simpleData.state == QWSPropertyNotifyEvent::PropertyNewValue) {
	QClipboardData *d = clipboardData();
	QString t = qwsClipboardText();
	if( (d->source() == 0 && !t.isEmpty()) || (d->source() != 0 && d->source()->text() != t) ) {
	    if( !d->source() )
		d->setSource(new QMimeData);
	    d->source()->setText( t );
	    emitChanged(QClipboard::Clipboard);
	}
    }

    recursionWatch = false;
    return true;
}

void QClipboard::setMimeData(QMimeData* src, Mode mode)
{
    Atom atom, sentinel_atom;
    QClipboardData *d;
    switch (mode) {
    case Selection:
        atom = XA_PRIMARY;
        sentinel_atom = ATOM(_QT_SELECTION_SENTINEL);
        d = selectionData();
        break;

    case Clipboard:
        atom = ATOM(CLIPBOARD);
        sentinel_atom = ATOM(_QT_CLIPBOARD_SENTINEL);
        d = clipboardData();
        break;

    default:
        qWarning("QClipboard::setMimeData: unsupported mode '%d'", mode);
        return;
    }

    Display *dpy = X11->display;
    Window newOwner;

    if (! src) { // no data, clear clipboard contents
        newOwner = XNone;
        d->clear();
    } else {
        setupOwner();

        newOwner = owner->internalWinId();

        d->setSource(src);
        d->timestamp = X11->time;
    }

    Window prevOwner = XGetSelectionOwner(dpy, atom);
    // use X11->time, since d->timestamp == CurrentTime when clearing
    XSetSelectionOwner(dpy, atom, newOwner, X11->time);

    if (mode == Selection)
        emitChanged(QClipboard::Selection);
    else
        emitChanged(QClipboard::Clipboard);

    if (XGetSelectionOwner(dpy, atom) != newOwner) {
        qWarning("QClipboard::setData: Cannot set X11 selection owner for %s",
                 X11->xdndAtomToString(atom).data());
        d->clear();
        return;
    }

    // Signal to other Qt processes that the selection has changed
    Window owners[2];
    owners[0] = newOwner;
    owners[1] = prevOwner;
    XChangeProperty(dpy, QApplication::desktop()->screen(0)->internalWinId(),
                     sentinel_atom, XA_WINDOW, 32, PropModeReplace,
                     (unsigned char*)&owners, 2);
}