eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/ui/section/media/ImageFileElement.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2007 EDIT
   4 * European Distributed Institute of Taxonomy
   5 * http://www.e-taxonomy.eu
   6 *
   7 * The contents of this file are subject to the Mozilla Public License Version 1.1
   8 * See LICENSE.TXT at the top of this package for the full license terms.
   9 */
  10
  11 package eu.etaxonomy.taxeditor.ui.section.media;
  12
  13 import java.io.IOException;
  14 import java.net.URI;
  15
  16 import org.apache.commons.io.FileUtils;
  17 import org.apache.http.HttpException;
  18 import org.eclipse.swt.events.SelectionListener;
  19
  20 import eu.etaxonomy.cdm.common.media.ImageInfo;
  21 import eu.etaxonomy.cdm.model.media.ImageFile;
  22 import eu.etaxonomy.taxeditor.ui.element.AbstractFormSection;
  23 import eu.etaxonomy.taxeditor.ui.element.CdmFormFactory;
  24 import eu.etaxonomy.taxeditor.ui.element.CdmPropertyChangeEvent;
  25 import eu.etaxonomy.taxeditor.ui.element.ICdmFormElement;
  26 import eu.etaxonomy.taxeditor.ui.element.ImageElement;
  27 import eu.etaxonomy.taxeditor.ui.element.KeyValueViewerElement;
  28 import eu.etaxonomy.taxeditor.ui.element.NumberWithLabelElement;
  29
  30 /**
  31  * @author n.hoffmann
  32  * @created Mar 26, 2010
  33  * @version 1.0
  34  */
  35 public class ImageFileElement extends MediaRepresentationPartElement<ImageFile> {
  36
  37         private NumberWithLabelElement text_height;
  38         private NumberWithLabelElement text_width;
  39         private KeyValueViewerElement element_keyValue;
  40         private ImageElement element_image;
  41
  42         public ImageFileElement(CdmFormFactory cdmFormFactory,
  43                         AbstractFormSection section, ImageFile element,
  44                         SelectionListener removeListener, int style) {
  45                 super(cdmFormFactory, section, element, removeListener, style);
  46         }
  47
  48         /** {@inheritDoc} */
  49         @Override
  50         public void createControls(ICdmFormElement formElement, int style) {
  51                 super.createControls(formElement, style);
  52
  53                 text_height = formFactory.createNumberTextWithLabelElement(formElement, "Height", null, style);
  54                 text_height.setEnabled(false);
  55                 text_width = formFactory.createNumberTextWithLabelElement(formElement, "Width", null, style);
  56                 text_width.setEnabled(false);
  57                 element_image = formFactory.createImageElement(formElement, null, style);
  58                 element_keyValue = formFactory.createKeyValueViewerElement(formElement, "Key", "Value", null);
  59         }
  60
  61         /** {@inheritDoc} */
  62         @Override
  63         public void setEntity(ImageFile entity) {
  64                 super.setEntity(entity);
  65                 text_height.setNumber(entity.getHeight());
  66                 text_width.setNumber(entity.getWidth());
  67                 try {
  68                         loadImage(entity.getUri(), false);
  69                 } catch (Exception e) {
  70                         handleException(e);
  71                 }
  72         }
  73
  74         private void loadImage(URI uri, boolean updateDimensions) throws IOException, HttpException{
  75                 element_image.initImageUri(uri);
  76
  77                 element_image.loadImage();
  78
  79
  80                 if(uri == null){
  81                         return;
  82                 }
  83
  84                 ImageInfo imageInfo = ImageInfo.NewInstanceWithMetaData(uri, 10000);
  85
  86                 element_keyValue.setInput(imageInfo.getMetaData());
  87
  88                 if(updateDimensions){
  89                         text_size.setText(FileUtils.byteCountToDisplaySize(imageInfo.getLength()));
  90                         // KLUDGE this is not save for very large files, because of the int cast.
  91                         // But then, I don't think we will handle such large files in the near future
  92                         getEntity().setSize((int) imageInfo.getLength());
  93
  94                         text_height.setNumber(imageInfo.getHeight());
  95                         getEntity().setHeight(imageInfo.getHeight());
  96
  97                         text_width.setNumber(imageInfo.getWidth());
  98                         getEntity().setWidth(imageInfo.getWidth());
  99                 }
 100
 101
 102         }
 103
 104         /** {@inheritDoc} */
 105         @Override
 106         public void handleEvent(Object eventSource) {
 107                 if(eventSource == text_uri){
 108                         try {
 109                             URI uri = text_uri.parseText();
 110                                 getEntity().setUri(uri);
 111                                 if(uri==null){
 112                                     //buffer URI if parsing error occurred
 113                                     MediaDetailElement parentMediaDetailElement = getParentMediaDetailElement();
 114                                     if(parentMediaDetailElement!=null){
 115                                         parentMediaDetailElement.setUriBuffer(text_uri.getText());
 116                                     }
 117                                 }
 118
 119                                 loadImage(getEntity().getUri(), true);
 120
 121                                 firePropertyChangeEvent(new CdmPropertyChangeEvent(this, null));
 122                         } catch (Exception e) {
 123                                 handleException(e);
 124                         } finally {
 125                                 firePropertyChangeEvent(this);
 126                         }
 127                 }
 128         }
 129
 130         protected void handleException(Exception e) {
 131                 element_image.unloadImage();
 132                 text_height.setNumber(0);
 133                 text_width.setNumber(0);
 134                 text_size.setNumber(0);
 135
 136                 element_image.loadImage();
 137         }
 138 }