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/*

 * Copyright 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 org.gss_project.gss.web.client.commands;

import org.gss_project.gss.web.client.FileMenu;

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

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

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

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

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

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

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

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

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

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

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

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

public class ViewImageCommand implements Command {

        final FileMenu.Images newImages;

        private PopupPanel containerPanel;

        private String imageDownloadURL;

        private Label errorLabel = new Label();

        /**

         * @param _containerPanel

         * @param _newImages the images of all the possible delete dialogs

         */

        public ViewImageCommand(PopupPanel _containerPanel, final FileMenu.Images _newImages, String _imageDownloadURL) {

                containerPanel = _containerPanel;

                newImages = _newImages;

                imageDownloadURL = _imageDownloadURL;

        }

        @Override

        public void execute() {

                containerPanel.hide();

                final Image image = new Image();

                // Hook up a load handler, so that we can be informed if the image

                // fails to load.

            image.addLoadHandler(new LoadHandler() {

                        @Override

                        public void onLoad(LoadEvent event) {

                                errorLabel.setText("");

                        }

                });

                image.addErrorHandler(new ErrorHandler() {

                        @Override

                        public void onError(ErrorEvent event) {

                                errorLabel.setText("An error occurred while loading.");

                        }

                });

            image.setUrl(imageDownloadURL);

            final DialogBox imagePopup = new DialogBox(true, true);

            imagePopup.setAnimationEnabled(true);

            imagePopup.setText("Showing image in actual size");

            VerticalPanel imageViewPanel = new VerticalPanel();

            errorLabel.setText("loading image...");

            imageViewPanel.add(errorLabel);

            imageViewPanel.add(image);

            imagePopup.setWidget(imageViewPanel);

            image.setTitle("Click to close");

            image.addClickHandler(new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                            imagePopup.hide();

                    }

            });

            imagePopup.setPopupPosition(0, 0);

            imagePopup.show();

        }

}