bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/diagramEditor/handlers/AlignVerticalHandler.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.modeling.ui.diagramEditor.handlers;
  13
  14 import java.util.ArrayList;
  15 import java.util.List;
  16
  17 import org.eclipse.core.commands.AbstractHandler;
  18 import org.eclipse.core.commands.ExecutionEvent;
  19 import org.eclipse.core.commands.ExecutionException;
  20 import org.eclipse.jface.viewers.ISelection;
  21 import org.eclipse.ui.handlers.HandlerUtil;
  22 import org.simantics.Simantics;
  23 import org.simantics.db.Resource;
  24 import org.simantics.db.WriteGraph;
  25 import org.simantics.db.common.request.WriteRequest;
  26 import org.simantics.db.exception.DatabaseException;
  27 import org.simantics.diagram.stubs.DiagramResource;
  28 import org.simantics.ui.utils.ResourceAdaptionUtils;
  29
  30 /**
  31  *
  32  * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
  33  *
  34  */
  35 public class AlignVerticalHandler extends AbstractHandler {
  36
  37         @Override
  38         public Object execute(ExecutionEvent event) throws ExecutionException {
  39
  40                 ISelection s = HandlerUtil.getCurrentSelectionChecked(event);
  41                 final Resource resources[] = ResourceAdaptionUtils.toResources(s);
  42
  43                 if (resources.length < 2)
  44                         return null;
  45
  46                 Simantics.getSession().asyncRequest(new WriteRequest() {
  47
  48                         @Override
  49                         public void perform(WriteGraph graph) throws DatabaseException {
  50                                 DiagramResource dr = DiagramResource.getInstance(graph);
  51
  52                                 List<Resource> elements = new ArrayList<Resource>();
  53                                 List<double[]> transforms = new ArrayList<double[]>();
  54                                 for (Resource r : resources) {
  55                                         //System.out.println(r + " " + GraphUtils.getReadableName(graph, r));
  56                                         if (graph.isInstanceOf(r, dr.Element) && !graph.isInstanceOf(r, dr.Connection)) {
  57                                                 double transform[] = graph.getPossibleRelatedValue(r, dr.HasTransform);
  58                                                 if (transform != null) {
  59                                                         elements.add(r);
  60                                                         transforms.add(transform);
  61                                                 }
  62                                         }
  63                                 }
  64                                 double mx = 0;
  65                                 double my = 0;
  66                                 for (double[] t : transforms) {
  67                                         mx += t[4];
  68                                         my += t[5];
  69                                 }
  70                                 mx /= transforms.size();
  71                                 my /= transforms.size();
  72
  73                                 // prevent moving symbols into the same position
  74                                 int count = 0;
  75                                 for (double t[] : transforms) {
  76                                         if (Math.abs(t[5] - my) < 0.1) {
  77                                                 count++;
  78                                         }
  79                                 }
  80                                 if (count > 1)
  81                                         return;
  82
  83                                 for (int i = 0; i < transforms.size(); i++) {
  84                                         Resource element = elements.get(i);
  85                                         double t[] = transforms.get(i);
  86                                         graph.claimLiteral(element, dr.HasTransform, new double[]{t[0],t[1],t[2],t[3],mx,t[5]});
  87                                 }
  88                         }
  89                 });
  90                 return null;
  91         }
  92
  93 }