eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/descriptiveDataSet/character/CharacterDragListener.java

   1 /**
   2 * Copyright (C) 2017 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 package eu.etaxonomy.taxeditor.editor.descriptiveDataSet.character;
  10
  11 import java.util.Collection;
  12
  13 import org.eclipse.jface.viewers.IStructuredSelection;
  14 import org.eclipse.jface.viewers.TreeSelection;
  15 import org.eclipse.jface.viewers.TreeViewer;
  16 import org.eclipse.swt.dnd.DragSourceEvent;
  17
  18 import eu.etaxonomy.cdm.model.description.Character;
  19 import eu.etaxonomy.cdm.model.description.FeatureNode;
  20 import eu.etaxonomy.taxeditor.featuretree.CharacterTransfer;
  21 import eu.etaxonomy.taxeditor.featuretree.e4.FeatureNodeDragListener;
  22
  23 /**
  24  * @author pplitzner
  25  * @since Jun 2, 2017
  26  *
  27  */
  28 public class CharacterDragListener extends FeatureNodeDragListener {
  29
  30     private TreeViewer structureViewer;
  31     private TreeViewer propertyViewer;
  32
  33     public CharacterDragListener(TreeViewer structureViewer, TreeViewer propertyViewer) {
  34         super(propertyViewer);
  35         this.structureViewer = structureViewer;
  36         this.propertyViewer = propertyViewer;
  37     }
  38
  39     @Override
  40     public void dragSetData(DragSourceEvent event) {
  41         TreeSelection structureSelection = (TreeSelection) structureViewer.getSelection();
  42         TreeSelection propertySelection = (TreeSelection) propertyViewer.getSelection();
  43         if(structureSelection!=null && propertySelection!=null
  44                 && !structureSelection.isEmpty() && !propertySelection.isEmpty()){
  45             //create all possible characters
  46             Collection<Character> characters = CharacterEditor.createCharacters(structureSelection, propertySelection);
  47
  48             if (CharacterTransfer.getInstance().isSupportedType(event.dataType)) {
  49                 event.data = characters;
  50             }
  51         }
  52     }
  53
  54     /**
  55      * Method declared on DragSourceListener
  56      */
  57     @Override
  58     public void dragStart(DragSourceEvent event) {
  59         event.doit =
  60                 !structureViewer.getSelection().isEmpty()
  61                 && !propertyViewer.getSelection().isEmpty()
  62                 && ((IStructuredSelection) structureViewer.getSelection()).toList()
  63                 .stream().allMatch(element -> element instanceof FeatureNode)
  64                 && ((IStructuredSelection) propertyViewer.getSelection()).toList()
  65                 .stream().allMatch(element -> element instanceof FeatureNode);
  66     }
  67
  68 }