Synnefo » Pithos

/*

 * 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.grnet.pithos.web.client;

import gr.grnet.pithos.web.client.animation.FadeIn;

import gr.grnet.pithos.web.client.animation.FadeOut;

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

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

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

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

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

import com.google.gwt.user.client.DOM;

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.HasVerticalAlignment;

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

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

/**

 * A panel that displays various system messages.

 */

public class MessagePanel extends Composite {

        /**

         * An image bundle for this widget's images.

         */

        public interface Images extends ClientBundle {

                @Source("gr/grnet/pithos/resources/messagebox_info.png")

                ImageResource info();

                @Source("gr/grnet/pithos/resources/messagebox_warning.png")

                ImageResource warn();

                @Source("gr/grnet/pithos/resources/messagebox_critical.png")

                ImageResource error();

        }

        /**

         * The widget's images.

         */

        public static Images images;

        /**

         * The system message to be displayed.

         */

        private HTML message = new HTML(" ");

        /**

         * A link to clear the displayed message.

         */

        private HTML clearMessageLink = new HTML("<a class='pithos-clearMessage' href='javascript:;'>Clear</a>");

        /**

         * The panel that contains the messages.

         */

        private HorizontalPanel inner = new HorizontalPanel();

        /**

         * The panel that enables special effects for this widget.

         */

        private SimplePanel simplePanel = new SimplePanel();

        /**

         * The widget's constructor.

         *

         * @param newImages a bundle that provides the images for this widget

         */

        public MessagePanel(final Images newImages) {

                images = newImages;

                buildPanel();

                simplePanel.setStyleName("effectPanel");

                inner.setStyleName("effectPanel-inner");

                DOM.setStyleAttribute(simplePanel.getElement(), "zoom", "1");

                simplePanel.add(inner);

                initWidget(simplePanel);

        }

        /**

         * Build the panel that contains the icon, the message and the 'clear' link.

         */

        private void buildPanel() {

                inner.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);

                inner.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);

                inner.setSpacing(4);

                inner.add(message);

                inner.add(clearMessageLink);

                inner.setCellVerticalAlignment(message, HasVerticalAlignment.ALIGN_MIDDLE);

                clearMessageLink.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                FadeOut anim = new FadeOut(simplePanel){

                                        @Override

                                        protected void onComplete() {

                                                super.onComplete();

                                                hideMessage();

                                        }

                                };

                                anim.run(500);

                        }

                });

        }

        /**

         * Display an error message.

         *

         * @param msg the message to display

         */

        public void displayError(final String msg) {

                GWT.log(msg, null);

                message = new HTML("<table class='pithos-errorMessage'><tr><td>" + AbstractImagePrototype.create(images.error()).getHTML() + "</td><td>" + msg + "</td></tr></table>");

                message.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                FadeOut anim = new FadeOut(simplePanel){

                                        @Override

                                        protected void onComplete() {

                                                super.onComplete();

                                                hideMessage();

                                        }

                                };

                                anim.run(500);

                        }

                });

                buildPanel();

                setVisible(true);

                FadeIn anim = new FadeIn(simplePanel);

                anim.run(500);

        }

        /**

         * Display a warning message.

         *

         * @param msg the message to display

         */

        public void displayWarning(final String msg) {

                message = new HTML("<table class='pithos-warnMessage'><tr><td>" + AbstractImagePrototype.create(images.warn()).getHTML() + "</td><td>" + msg + "</td></tr></table>");

                message.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                FadeOut anim = new FadeOut(simplePanel){

                                        @Override

                                        protected void onComplete() {

                                                super.onComplete();

                                                hideMessage();

                                        }

                                };

                                anim.run(500);

                        }

                });

                buildPanel();

                setVisible(true);

                FadeIn anim = new FadeIn(simplePanel);

                anim.run(500);

        }

        /**

         * Display an informational message.

         *

         * @param msg the message to display

         */

        public void displayInformation(final String msg) {

                message = new HTML("<table class='pithos-infoMessage'><tr><td>" + AbstractImagePrototype.create(images.info()).getHTML() + "</td><td>" + msg + "</td></tr></table>");

                message.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                FadeOut anim = new FadeOut(simplePanel){

                                        @Override

                                        protected void onComplete() {

                                                super.onComplete();

                                                hideMessage();

                                        }

                                };

                                anim.run(500);

                        }

                });

                buildPanel();

                setVisible(true);

                FadeIn anim = new FadeIn(simplePanel);

                anim.run(500);

        }

        /**

         * Clear the displayed message and hide the panel.

         */

        public void hideMessage() {

                inner.clear();

                message = new HTML(" ");

                this.setVisible(false);

        }

}