001/*
002 * This library is part of OpenCms -
003 * the Open Source Content Management System
004 *
005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * For further information about Alkacon Software, please see the
018 * company website: http://www.alkacon.com
019 *
020 * For further information about OpenCms, please see the
021 * project website: http://www.opencms.org
022 *
023 * You should have received a copy of the GNU Lesser General Public
024 * License along with this library; if not, write to the Free Software
025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
026 */
027
028package org.opencms.ui.client;
029
030import com.vaadin.client.communication.MessageSender;
031import com.vaadin.client.ui.VDragAndDropWrapper;
032import com.vaadin.client.ui.draganddropwrapper.DragAndDropWrapperConnector;
033
034/**
035 * Overrides VDragAndDropWrapper to solve RPC issue.
036 */
037public class CmsVDragAndDropWrapper extends VDragAndDropWrapper {
038
039    /**
040     * @see com.vaadin.client.ui.VDragAndDropWrapper#startNextUpload()
041     */
042    @Override
043    public void startNextUpload() {
044
045        // Workaround for mysterious bug where RPC calls would sometimes not be
046        // sent to the server after an upload until another UI event
047        // (e.g. mousemove) happened
048
049        final DragAndDropWrapperConnector connector = (DragAndDropWrapperConnector)getConnector();
050        final MessageSender sender = connector.getConnection().getMessageSender();
051        sender.sendInvocationsToServer();
052        super.startNextUpload();
053    }
054}