Synnefo » Pithos Web Client

/*

 * Copyright 2011 GRNET S.A. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or

 * without modification, are permitted provided that the following

 * conditions are met:

 *

 *   1. Redistributions of source code must retain the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer.

 *

 *   2. Redistributions in binary form must reproduce the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer in the documentation and/or other materials

 *      provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * The views and conclusions contained in the software and

 * documentation are those of the authors and should not be

 * interpreted as representing official policies, either expressed

 * or implied, of GRNET S.A.

 */

package gr.grnet.pithos.web.client;

import com.google.gwt.resources.client.ClientBundle;

import com.google.gwt.resources.client.ImageResource;

import com.google.gwt.user.client.ui.AbstractImagePrototype;

import com.google.gwt.user.client.ui.Composite;

import com.google.gwt.user.client.ui.HTML;

import com.google.gwt.user.client.ui.HasHorizontalAlignment;

import com.google.gwt.user.client.ui.VerticalPanel;

/**

 * The 'loading' indicator widget implementation.

 */

public class LoadingIndicator extends Composite {

        public static final String DEFAULT_MESSAGE="Please Wait";

        HTML messageLabel;

        /**

         * An image bundle for this widgets images.

         */

        public interface Images extends ClientBundle {

                @Source("gr/grnet/pithos/resources/ajax-loader.gif")

                ImageResource loading();

        }

        /**

         * The widget's constructor that creates a spinning indicator image.

         */

        public LoadingIndicator(Images images) {

                VerticalPanel vp = new VerticalPanel();

                //vp.setHorizontalAlignment(HorizontalAlignmentConstant.CENTER);

                HTML inner = new HTML(AbstractImagePrototype.create(images.loading()).getHTML());

                vp.add(inner);

                vp.add(messageLabel = new HTML(DEFAULT_MESSAGE) );

                vp.setCellHorizontalAlignment(inner, HasHorizontalAlignment.ALIGN_CENTER);

                vp.setCellHorizontalAlignment(messageLabel, HasHorizontalAlignment.ALIGN_CENTER);

                initWidget(vp);

        }

        /**

         * Modify the message.

         *

         * @param message the message to set

         */

        public void setMessage(String message) {

                messageLabel.setHTML(message);

        }

        public void clearMessage(){

                setMessage(DEFAULT_MESSAGE);

        }

        public void show(String msg){

                if(msg==null)

                        setMessage(DEFAULT_MESSAGE);

                else

                        setMessage(msg);

                this.setVisible(true);

        }

        public void hide(){

                setMessage(DEFAULT_MESSAGE);

                this.setVisible(false);

        }

}