eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/media/MediaViewLabelProvider.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2017 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 package eu.etaxonomy.taxeditor.editor.view.media;
  11
  12 import java.io.InputStream;
  13 import java.net.URI;
  14 import java.util.List;
  15 import java.util.Set;
  16
  17 import org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider.IStyledLabelProvider;
  18 import org.eclipse.jface.viewers.LabelProvider;
  19 import org.eclipse.jface.viewers.StyledString;
  20 import org.eclipse.swt.SWT;
  21 import org.eclipse.swt.graphics.GC;
  22 import org.eclipse.swt.graphics.Image;
  23 import org.eclipse.swt.widgets.Display;
  24
  25 import eu.etaxonomy.cdm.common.UriUtils;
  26 import eu.etaxonomy.cdm.model.common.IdentifiableEntity;
  27 import eu.etaxonomy.cdm.model.media.Media;
  28 import eu.etaxonomy.cdm.model.media.MediaRepresentation;
  29 import eu.etaxonomy.cdm.model.media.MediaRepresentationPart;
  30 import eu.etaxonomy.taxeditor.preference.PreferencesUtil;
  31
  32 /**
  33  * @author k.luther
  34  * @date 11.10.2017
  35  *
  36  */
  37 public class MediaViewLabelProvider extends LabelProvider implements IStyledLabelProvider {
  38
  39     /**
  40      * {@inheritDoc}
  41      */
  42     @Override
  43     public String getText(Object element) {
  44         return getStyledText(element).getString();
  45     }
  46
  47     @Override
  48     public StyledString getStyledText(Object element) {
  49         if (element instanceof IdentifiableEntity) {
  50             IdentifiableEntity<?> identifiableEntity= (IdentifiableEntity<?>) element;
  51             if(identifiableEntity.getId()==0){
  52                 return new StyledString(identifiableEntity.generateTitle());
  53             }
  54             else{
  55                 return new StyledString(identifiableEntity.getTitleCache());
  56             }
  57         }
  58         return null;
  59     }
  60
  61     @Override
  62     public Image getImage(Object element) {
  63         Image image = null;
  64         if (element instanceof Media && PreferencesUtil.isShowMediaPreview()){
  65             Set<MediaRepresentation> representations = ((Media)element).getRepresentations();
  66             if(representations.iterator().hasNext()){
  67                 MediaRepresentation rep = representations.iterator().next();
  68                 List<MediaRepresentationPart> parts = rep.getParts();
  69                 MediaRepresentationPart smallestPart = null;
  70                 for (MediaRepresentationPart part: parts){
  71                     if (smallestPart != null){
  72                         if (smallestPart.getSize() != null && part.getSize() != null) {
  73                             if (smallestPart.getSize() > part.getSize()){
  74                                 smallestPart = part;
  75                             }
  76                         }
  77                     }else{
  78                         smallestPart = part;
  79                     }
  80
  81                 }
  82                 URI uri = parts.get(0).getUri();
  83                 if (uri == null){
  84                     return null;
  85                 }
  86                 InputStream imageStream;
  87                 try {
  88                     imageStream = UriUtils.getInputStream(uri);
  89                     image = new Image(Display.getCurrent(), imageStream);
  90                     int height = image.getBounds().height;
  91                     int width = image.getBounds().width;
  92                     int scale = 50;
  93                     if (height>width){
  94                         width = width/(height/scale);
  95                         height = scale;
  96                     }else{
  97                         height = height/(width/scale);
  98                         width = scale;
  99                     }
 100                     Image scaled = new Image(Display.getDefault(), scale, scale);
 101
 102                     GC gc = new GC(scaled);
 103                     gc.setAntialias(SWT.ON);
 104                     gc.setInterpolation(SWT.HIGH);
 105
 106
 107                     gc.drawImage(image, 0, 0,
 108                     image.getBounds().width, image.getBounds().height,
 109                     0, 0, width, height);
 110
 111                     gc.dispose();
 112                     image.dispose(); // don't forget about me!
 113                     return scaled;
 114
 115                 } catch (Exception e) {
 116                     // TODO Auto-generated catch block
 117                    return null;
 118                 }
 119
 120             }
 121
 122         }
 123         return image;
 124     }
 125
 126     @Override
 127     public void dispose() {
 128         // garbage collection system resources
 129
 130     }
 131
 132
 133
 134 }