bundles/org.simantics.spreadsheet.ui/src/org/simantics/spreadsheet/ui/PopulateSheetDropParticipant.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.spreadsheet.ui;
  13
  14 import java.awt.geom.AffineTransform;
  15 import java.util.Collections;
  16 import java.util.List;
  17
  18 import org.eclipse.jface.viewers.IStructuredSelection;
  19 import org.simantics.databoard.Bindings;
  20 import org.simantics.databoard.util.URIStringUtils;
  21 import org.simantics.db.ReadGraph;
  22 import org.simantics.db.Resource;
  23 import org.simantics.db.Session;
  24 import org.simantics.db.exception.DatabaseException;
  25 import org.simantics.db.request.Read;
  26 import org.simantics.diagram.adapter.GraphToDiagramSynchronizer;
  27 import org.simantics.diagram.participant.PopulateSelectionDropParticipant;
  28 import org.simantics.g2d.dnd.ElementClassDragItem;
  29 import org.simantics.g2d.element.ElementHints;
  30 import org.simantics.layer0.Layer0;
  31 import org.simantics.spreadsheet.resource.SpreadsheetResource;
  32 import org.simantics.utils.ui.ISelectionUtils;
  33
  34 public class PopulateSheetDropParticipant extends PopulateSelectionDropParticipant {
  35
  36     public PopulateSheetDropParticipant(GraphToDiagramSynchronizer synchronizer) {
  37         super(synchronizer);
  38     }
  39
  40     @Override
  41     public List<ElementClassDragItem> getElements(Session session, IStructuredSelection selection) throws DatabaseException {
  42
  43         final Resource resource = ISelectionUtils.filterSingleSelection(selection, Resource.class);
  44         if(resource == null) return Collections.emptyList();
  45
  46         return session.syncRequest(new Read<List<ElementClassDragItem>>() {
  47
  48             @Override
  49             public List<ElementClassDragItem> perform(ReadGraph graph) throws DatabaseException {
  50
  51                 SpreadsheetResource sr = SpreadsheetResource.getInstance(graph);
  52                 if(graph.isInstanceOf(resource, sr.Spreadsheet)) {
  53                     Layer0 L0 = Layer0.getInstance(graph);
  54                     ElementClassDragItem item = new ElementClassDragItem(SheetFactory.createSheetClass(sr.SpreadsheetElement));
  55                     item.getHintContext().setHint(SheetClass.KEY_SHEET, resource);
  56                     String rvi = "/" + URIStringUtils.escape((String)graph.getPossibleRelatedValue(resource, L0.HasName, Bindings.STRING));
  57                     item.getHintContext().setHint(SheetClass.KEY_RVI, rvi);
  58                     item.getHintContext().setHint(ElementHints.KEY_TRANSFORM, AffineTransform.getScaleInstance(1,1));
  59                     return Collections.singletonList(item);
  60                 } else {
  61                     return Collections.emptyList();
  62                 }
  63
  64             }
  65
  66         });
  67
  68     }
  69
  70 }