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

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