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

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