gerrit.simantics Code Review - simantics/sysdyn.git/blob

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management in\r
   3  * 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.sysdyn.ui.trend.chart.element;\r
  13 \r
  14 import java.awt.datatransfer.Transferable;\r
  15 import java.awt.datatransfer.UnsupportedFlavorException;\r
  16 import java.awt.dnd.DnDConstants;\r
  17 import java.awt.dnd.DropTargetDragEvent;\r
  18 import java.awt.geom.AffineTransform;\r
  19 import java.io.IOException;\r
  20 \r
  21 import org.eclipse.jface.viewers.IStructuredSelection;\r
  22 import org.simantics.db.ReadGraph;\r
  23 import org.simantics.db.Resource;\r
  24 import org.simantics.db.Session;\r
  25 import org.simantics.db.common.request.UnaryRead;\r
  26 import org.simantics.db.exception.DatabaseException;\r
  27 import org.simantics.diagram.adapter.GraphToDiagramSynchronizer;\r
  28 import org.simantics.g2d.dnd.DnDHints;\r
  29 import org.simantics.g2d.dnd.ElementClassDragItem;\r
  30 import org.simantics.g2d.dnd.IDnDContext;\r
  31 import org.simantics.g2d.dnd.IDropTargetParticipant;\r
  32 import org.simantics.g2d.element.ElementHints;\r
  33 import org.simantics.modeling.ui.diagramEditor.PopulateElementDropParticipant;\r
  34 import org.simantics.sysdyn.JFreeChartResource;\r
  35 import org.simantics.ui.dnd.LocalObjectTransfer;\r
  36 import org.simantics.ui.dnd.LocalObjectTransferable;\r
  37 import org.simantics.ui.utils.AdaptionUtils;\r
  38 \r
  39 /**\r
  40  * Drop participant for dropping chart definitions into diagrams\r
  41  * @author Teemu Lempinen\r
  42  *\r
  43  */\r
  44 public class PopulateChartDropParticipant extends PopulateElementDropParticipant implements IDropTargetParticipant {\r
  45 \r
  46     public PopulateChartDropParticipant(GraphToDiagramSynchronizer synchronizer) {\r
  47         super(synchronizer);\r
  48     }\r
  49 \r
  50     @Override\r
  51     public void dragEnter(DropTargetDragEvent dtde, final IDnDContext dp) {\r
  52         Transferable tr = dtde.getTransferable();\r
  53         if (tr.isDataFlavorSupported(LocalObjectTransferable.FLAVOR)) {\r
  54 \r
  55             Session session = synchronizer.getSession();\r
  56 \r
  57             Object obj = null;\r
  58 \r
  59             try {\r
  60                 obj = tr.getTransferData(LocalObjectTransferable.FLAVOR);\r
  61                 \r
  62                 // Create a structural selection from transfer data\r
  63                 if (!(obj instanceof IStructuredSelection)) {\r
  64                     obj = LocalObjectTransfer.getTransfer().getObject();\r
  65                 }\r
  66 \r
  67                 if (obj instanceof IStructuredSelection) {\r
  68 \r
  69                     IStructuredSelection sel = (IStructuredSelection) obj;\r
  70                     \r
  71                     // Can drop only one chart at the time\r
  72                     if (sel.size() == 1) {\r
  73                         \r
  74                         // Get the chart definition\r
  75                         Resource chart = AdaptionUtils.adaptToSingle(sel, Resource.class);\r
  76                         if (chart == null)\r
  77                             return;\r
  78 \r
  79                         ElementClassDragItem item = session.syncRequest(new UnaryRead<Resource,ElementClassDragItem>(chart) {\r
  80 \r
  81                             @Override\r
  82                             public ElementClassDragItem perform(ReadGraph graph) throws DatabaseException {\r
  83                                 if(graph.isInstanceOf(parameter, JFreeChartResource.getInstance(graph).Chart)) {\r
  84                                     ElementClassDragItem item = new ElementClassDragItem(ChartElementFactory.create(graph, parameter));\r
  85                                     AffineTransform initialTr = AffineTransform.getScaleInstance(1, 1);\r
  86                                     item.getHintContext().setHint(ElementHints.KEY_TRANSFORM, initialTr);\r
  87                                     return item;\r
  88                                 } else {\r
  89                                     return null;\r
  90                                 }\r
  91 \r
  92                             }\r
  93                         });\r
  94 \r
  95                         if(item != null) {\r
  96                             dp.add(item);\r
  97                             dp.getHints().setHint(DnDHints.KEY_DND_GRID_COLUMNS, Integer.valueOf(1));\r
  98                         }\r
  99 \r
 100                     }\r
 101 \r
 102                 }\r
 103 \r
 104             } catch (UnsupportedFlavorException e) {\r
 105                 e.printStackTrace();\r
 106             } catch (IOException e) {\r
 107                 e.printStackTrace();\r
 108             } catch (DatabaseException e) {\r
 109                 e.printStackTrace();\r
 110             }\r
 111 \r
 112         }\r
 113 \r
 114         dtde.acceptDrag(DnDConstants.ACTION_COPY);\r
 115     }\r
 116 }\r