bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/StaticTerminals.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.g2d.element.handler.impl;\r
  13 \r
  14 import java.awt.Shape;\r
  15 import java.awt.geom.AffineTransform;\r
  16 import java.util.ArrayList;\r
  17 import java.util.Collection;\r
  18 import java.util.HashMap;\r
  19 import java.util.Map;\r
  20 \r
  21 import org.simantics.g2d.diagram.handler.Topology.Terminal;\r
  22 import org.simantics.g2d.element.IElement;\r
  23 import org.simantics.g2d.element.handler.TerminalLayout;\r
  24 import org.simantics.g2d.element.handler.TerminalTopology;\r
  25 import org.simantics.g2d.utils.geom.DirectionSet;\r
  26 import org.simantics.utils.datastructures.ValueUtils;\r
  27 \r
  28 /**\r
  29  * \r
  30  * \r
  31  * Example:\r
  32  * \r
  33  *   TerminalHandler th = \r
  34  *      StaticTerminals.compile(\r
  35  *              topTerminal,    0.0, -10.0, DirectionSet.N,\r
  36  *              bottomTerminal, 0.0,  10.0, DirectionSet.S,\r
  37  *              leftTerminal,  -10.0,  0.0, DirectionSet.W,\r
  38  *          rightTerminal,  20.0,  0.0, DirectionSet.E);\r
  39  * \r
  40  * @author Toni Kalajainen\r
  41  */\r
  42 public class StaticTerminals implements TerminalLayout, TerminalTopology {\r
  43 \r
  44     private static final long serialVersionUID = -7324592260579191478L;\r
  45 \r
  46     /**\r
  47          * Compile terminal handler with static terminals.\r
  48          * The xytArray is an varargs array which consists of sequences of\r
  49          *  (terminal, x-position, y-position, DirectionSet).\r
  50          * \r
  51          * @param xytArray an array of (x, y, terminal) triples\r
  52          * @return terminal reference\r
  53          */\r
  54         public static TerminalLayout compile(Object ... xytArray)\r
  55         {\r
  56                 return new StaticTerminals(xytArray);\r
  57         }\r
  58         \r
  59         private class TerminalImpl implements Terminal {\r
  60                 double x, y;\r
  61                 DirectionSet ds;\r
  62                 Terminal t;\r
  63         }\r
  64         \r
  65         Map<Terminal, TerminalImpl> terminalMap = new HashMap<Terminal, TerminalImpl>();\r
  66         ArrayList<Terminal> terminals = new ArrayList<Terminal>();\r
  67         \r
  68         StaticTerminals(Object ... xytArray)\r
  69         {\r
  70                 assert(xytArray.length % 4 == 0);\r
  71                 for (int i=0; i<xytArray.length/4; i++)\r
  72                 {\r
  73                         TerminalImpl ti = new TerminalImpl();\r
  74                         ti.t = (Terminal) xytArray[i*4+0];\r
  75                         ti.x = ValueUtils.toDoubleScalar( xytArray[i*4+1] );\r
  76                         ti.y = ValueUtils.toDoubleScalar( xytArray[i*4+2] );\r
  77                         DirectionSet ds = (DirectionSet) xytArray[i*4+3];\r
  78                         ti.ds = ds;\r
  79                         terminals.add(ti.t);\r
  80                         terminalMap.put(ti.t, ti);\r
  81                 }\r
  82         }       \r
  83 \r
  84         @Override\r
  85         public AffineTransform getTerminalPosition(IElement node, Terminal t) {\r
  86                 TerminalImpl ti = terminalMap.get(t);\r
  87                 if (ti==null) return null;\r
  88                 AffineTransform result = new AffineTransform();\r
  89                 result.setToTranslation(ti.x, ti.y);\r
  90                 return result;\r
  91         }\r
  92 \r
  93         @Override\r
  94         public void getTerminals(IElement e, Collection<Terminal> result) {\r
  95                 result.addAll(terminals);\r
  96         }\r
  97 \r
  98         @Override\r
  99         public boolean getTerminalDirection(IElement node, Terminal t, DirectionSet directions) {\r
 100                 TerminalImpl ti = terminalMap.get(t);\r
 101                 if (ti==null) return false;\r
 102                 directions.addAll(ti.ds);\r
 103                 return true;\r
 104         }\r
 105 \r
 106         @Override\r
 107         public Shape getTerminalShape(IElement node, Terminal t) {\r
 108                 return null;\r
 109         }\r
 110         \r
 111 }\r