org.gss_project.gss.web.client.commands.ViewImageCommand.java Source code

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Here is the source code for org.gss_project.gss.web.client.commands.ViewImageCommand.java

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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();
    }
}