code.grnet.gr Git - pithos/blob - src/gr/ebs/gss/client/commands/ViewImageCommand.java

   1 /*
   2  * Copyright 2009 Electronic Business Systems Ltd.
   3  *
   4  * This file is part of GSS.
   5  *
   6  * GSS is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GSS is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 package gr.ebs.gss.client.commands;
  20
  21 import gr.ebs.gss.client.FileMenu;
  22
  23 import com.google.gwt.event.dom.client.ClickEvent;
  24 import com.google.gwt.event.dom.client.ClickHandler;
  25 import com.google.gwt.event.dom.client.ErrorEvent;
  26 import com.google.gwt.event.dom.client.ErrorHandler;
  27 import com.google.gwt.event.dom.client.LoadEvent;
  28 import com.google.gwt.event.dom.client.LoadHandler;
  29 import com.google.gwt.user.client.Command;
  30 import com.google.gwt.user.client.ui.DialogBox;
  31 import com.google.gwt.user.client.ui.Image;
  32 import com.google.gwt.user.client.ui.Label;
  33 import com.google.gwt.user.client.ui.PopupPanel;
  34 import com.google.gwt.user.client.ui.VerticalPanel;
  35
  36
  37 public class ViewImageCommand implements Command {
  38
  39         final FileMenu.Images newImages;
  40
  41         private PopupPanel containerPanel;
  42
  43         private String imageDownloadURL;
  44
  45         private Label errorLabel = new Label();
  46
  47         /**
  48          * @param _containerPanel
  49          * @param _newImages the images of all the possible delete dialogs
  50          */
  51         public ViewImageCommand(PopupPanel _containerPanel, final FileMenu.Images _newImages, String _imageDownloadURL) {
  52                 containerPanel = _containerPanel;
  53                 newImages = _newImages;
  54                 imageDownloadURL = _imageDownloadURL;
  55         }
  56
  57         @Override
  58         public void execute() {
  59                 containerPanel.hide();
  60
  61                 final Image image = new Image();
  62                 // Hook up a load handler, so that we can be informed if the image
  63                 // fails to load.
  64             image.addLoadHandler(new LoadHandler() {
  65
  66                         @Override
  67                         public void onLoad(LoadEvent event) {
  68                                 errorLabel.setText("");
  69                         }
  70                 });
  71                 image.addErrorHandler(new ErrorHandler() {
  72
  73                         @Override
  74                         public void onError(ErrorEvent event) {
  75                                 errorLabel.setText("An error occurred while loading.");
  76                         }
  77                 });
  78             image.setUrl(imageDownloadURL);
  79             final DialogBox imagePopup = new DialogBox(true, true);
  80             imagePopup.setAnimationEnabled(true);
  81             imagePopup.setText("Showing image in actual size");
  82             VerticalPanel imageViewPanel = new VerticalPanel();
  83             errorLabel.setText("loading image...");
  84             imageViewPanel.add(errorLabel);
  85             imageViewPanel.add(image);
  86             imagePopup.setWidget(imageViewPanel);
  87             image.setTitle("Click to close");
  88             image.addClickHandler(new ClickHandler() {
  89
  90                         @Override
  91                         public void onClick(ClickEvent event) {
  92                         imagePopup.hide();
  93                 }
  94             });
  95             imagePopup.setPopupPosition(0, 0);
  96             imagePopup.show();
  97         }
  98 }