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.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> Service designed and implemented by " + "<a href='http://www.grnet.gr'>GRNET</a></p>");

                text.setStyleName("pithos-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;

                        }

        }

}