eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/media/e4/MediaViewPartE4.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.editor.view.media.e4;
  11
  12 import javax.annotation.PostConstruct;
  13 import javax.inject.Inject;
  14 import javax.inject.Named;
  15
  16 import org.eclipse.e4.core.di.annotations.Optional;
  17 import org.eclipse.e4.ui.model.application.ui.basic.MPart;
  18 import org.eclipse.e4.ui.services.EMenuService;
  19 import org.eclipse.e4.ui.services.IServiceConstants;
  20 import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
  21 import org.eclipse.jface.viewers.AbstractTreeViewer;
  22 import org.eclipse.jface.viewers.ISelectionChangedListener;
  23 import org.eclipse.jface.viewers.IStructuredSelection;
  24 import org.eclipse.jface.viewers.StructuredSelection;
  25 import org.eclipse.jface.viewers.TreeNode;
  26 import org.eclipse.jface.viewers.TreeViewer;
  27 import org.eclipse.swt.SWT;
  28 import org.eclipse.swt.widgets.Composite;
  29 import org.eclipse.swt.widgets.Tree;
  30
  31 import eu.etaxonomy.cdm.model.description.IDescribable;
  32 import eu.etaxonomy.taxeditor.editor.MultiPageTaxonEditor;
  33 import eu.etaxonomy.taxeditor.editor.l10n.Messages;
  34 import eu.etaxonomy.taxeditor.editor.view.descriptive.DescriptiveViewPart;
  35 import eu.etaxonomy.taxeditor.editor.view.media.MediaContentProvider;
  36 import eu.etaxonomy.taxeditor.editor.view.media.MediaLabelProvider;
  37 import eu.etaxonomy.taxeditor.model.AbstractUtility;
  38 import eu.etaxonomy.taxeditor.model.IPartContentHasDetails;
  39 import eu.etaxonomy.taxeditor.model.IPartContentHasMedia;
  40 import eu.etaxonomy.taxeditor.model.IPartContentHasSupplementalData;
  41 import eu.etaxonomy.taxeditor.view.e4.AbstractCdmEditorPartE4;
  42 import eu.etaxonomy.taxeditor.view.e4.details.DetailsPartE4;
  43 import eu.etaxonomy.taxeditor.view.e4.supplementaldata.SupplementalDataPartE4;
  44
  45 /**
  46  *
  47  * @author pplitzner
  48  * @since Aug 14, 2017
  49  *
  50  */
  51 public class MediaViewPartE4 extends AbstractCdmEditorPartE4
  52         implements IPartContentHasDetails, IPartContentHasSupplementalData {
  53
  54     private ISelectionChangedListener selectionChangedListener;
  55
  56         @Inject
  57         private ESelectionService selService;
  58
  59         @PostConstruct
  60         public void create(Composite parent, EMenuService menuService) {
  61
  62                 TreeViewer treeViewer = new TreeViewer(new Tree(parent, SWT.H_SCROLL
  63                                 | SWT.V_SCROLL | SWT.FULL_SELECTION));
  64
  65                 treeViewer.setContentProvider(new MediaContentProvider());
  66                 treeViewer.setLabelProvider(new MediaLabelProvider());
  67                 treeViewer.setAutoExpandLevel(2);
  68                 viewer = treeViewer;
  69
  70                 // Propagate selection from viewer
  71         selectionChangedListener = (event -> selService.setSelection(AbstractUtility.getElementsFromSelectionChangedEvent(event)));
  72         viewer.addSelectionChangedListener(selectionChangedListener);
  73
  74         //create context menu
  75         menuService.registerContextMenu(viewer.getControl(), "eu.etaxonomy.taxeditor.editor.popupmenu.mediaview");
  76
  77         }
  78
  79         @Inject
  80         @Optional
  81         public void selectionChanged(
  82                 @Named(IServiceConstants.ACTIVE_SELECTION)Object selection,
  83                 @Named(IServiceConstants.ACTIVE_PART)MPart activePart,
  84                 MPart thisPart){
  85             if(activePart==thisPart){
  86                 return;
  87             }
  88
  89             Object partObject = createPartObject(activePart);
  90
  91             if (partObject instanceof DetailsPartE4 || partObject instanceof SupplementalDataPartE4
  92                     || partObject instanceof DescriptiveViewPart) {
  93                 // do not show empty page as these views are also used to edit the
  94                 // description selected in this view
  95                 return;
  96             }
  97
  98             if(partObject instanceof IPartContentHasMedia && ((IPartContentHasMedia) partObject).canAttachMedia()){
  99                 IStructuredSelection structuredSelection = createSelection(selection);
 100                 if(structuredSelection==null || structuredSelection.isEmpty()){
 101                     showEmptyPage();
 102                     return;
 103                 }
 104
 105                 Object firstElement = structuredSelection.getFirstElement();
 106                 if (partObject instanceof MultiPageTaxonEditor){
 107                     if (firstElement != ((MultiPageTaxonEditor)partObject).getTaxon()){
 108                         showEmptyPage();
 109                         return;
 110                     }
 111                 }
 112                 if(firstElement instanceof TreeNode){
 113                     showViewer(new StructuredSelection(((TreeNode) firstElement).getValue()), activePart, viewer);
 114                     return;
 115                 }
 116                 else if(firstElement!=null
 117                         && firstElement instanceof IDescribable<?>){
 118                     showViewer(structuredSelection, activePart, viewer);
 119                     return;
 120                 }
 121             }
 122             showEmptyPage();
 123             return;
 124         }
 125
 126         /** {@inheritDoc} */
 127         @Override
 128         public void changed(Object object) {
 129             ((AbstractTreeViewer) viewer).expandToLevel(2);
 130             viewer.refresh();
 131             if(object != null){
 132                 StructuredSelection selection = new StructuredSelection(object);
 133                 viewer.setSelection(selection, true);
 134             }
 135             super.changed(object);
 136         }
 137
 138         @Override
 139         protected String getViewName() {
 140                 return Messages.MediaViewPart_MEDIA;
 141         }
 142
 143 }