Synnefo

/*

 * Copyright 2007, 2008, 2009 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 gr.ebs.gss.client;

import com.google.gwt.core.client.GWT;

import com.google.gwt.dom.client.NativeEvent;

import com.google.gwt.event.dom.client.ClickEvent;

import com.google.gwt.event.dom.client.ClickHandler;

import com.google.gwt.event.dom.client.KeyCodes;

import com.google.gwt.user.client.Event.NativePreviewEvent;

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

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

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 'about' dialog box.

 */

public class AboutDialog extends DialogBox {

        /**

         * The widget constructor.

         */

        public AboutDialog() {

                // Set the dialog's caption.

                Configuration conf = (Configuration) GWT.create(Configuration.class);

                String service = conf.serviceName();

                setText("About " + service);

                setAnimationEnabled(true);

                // A VerticalPanel that contains the 'about' label and the 'OK' button.

                final VerticalPanel outer = new VerticalPanel();

                // Create the 'about' text and set the style.

                final HTML text = new HTML("This is the Web client for the " + service +

                                        " service. You can use it to store, retrieve and share " +

                                        "files in the " + service + " server grid. <p>Pithos version: " +

                                        conf.version() + "<br> A GRNET service designed and implemented by " + "<a href='http://www.grnet.gr'>GRNET</a>" + " and " +

                                        "<a href='http://www.ebs.gr' target='about'>EBS</a></p>");

                text.setStyleName("gss-AboutText");

                outer.add(text);

                // Create the 'OK' button, along with a listener that hides the dialog

                // when the button is clicked.

                final Button confirm = new Button("Close", new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                hide();

                        }

                });

                outer.add(confirm);

                outer.setCellHorizontalAlignment(confirm, HasHorizontalAlignment.ALIGN_CENTER);

                outer.setSpacing(8);

                setWidget(outer);

        }

        @Override

        protected void onPreviewNativeEvent(NativePreviewEvent preview) {

                super.onPreviewNativeEvent(preview);

                NativeEvent evt = preview.getNativeEvent();

                if (evt.getType().equals("keydown"))

                        // Use the popup's key preview hooks to close the dialog when

                        // either enter or escape is pressed.

                        switch (evt.getKeyCode()) {

                                case KeyCodes.KEY_ENTER:

                                case KeyCodes.KEY_ESCAPE:

                                        hide();

                                        break;

                        }

        }

}