Pithos_GSS » GSS

/*

 * Copyright 2007, 2008, 2009, 2010 Electronic Business Systems Ltd.

 *

 * This file is part of GSS.

 *

 * GSS is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * GSS is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with GSS.  If not, see <http://www.gnu.org/licenses/>.

 */

package org.gss_project.gss.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("org/gss_project/gss/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);

        }

}