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

   1 /*******************************************************************************\r
   2  * Copyright (c) 2010 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.equation.expressions;\r
  13 \r
  14 import java.util.Arrays;\r
  15 import java.util.List;\r
  16 import java.util.Map;\r
  17 \r
  18 import org.eclipse.jface.layout.GridDataFactory;\r
  19 import org.eclipse.jface.layout.GridLayoutFactory;\r
  20 import org.eclipse.jface.text.BadLocationException;\r
  21 import org.eclipse.jface.text.IDocument;\r
  22 import org.eclipse.swt.SWT;\r
  23 import org.eclipse.swt.graphics.Point;\r
  24 import org.eclipse.swt.widgets.Composite;\r
  25 import org.eclipse.swt.widgets.Label;\r
  26 import org.simantics.db.ReadGraph;\r
  27 import org.simantics.db.Resource;\r
  28 import org.simantics.db.WriteGraph;\r
  29 import org.simantics.db.common.request.WriteRequest;\r
  30 import org.simantics.db.exception.DatabaseException;\r
  31 import org.simantics.db.request.Read;\r
  32 import org.simantics.layer0.Layer0;\r
  33 import org.simantics.sysdyn.SysdynResource;\r
  34 import org.simantics.ui.SimanticsUI;\r
  35 \r
  36 public class ConstantExpressionViewFactor implements IExpressionViewFactor {\r
  37 \r
  38     private Label equationLabel;\r
  39     private ExpressionField expression;\r
  40 \r
  41     @Override\r
  42     public void createView(Composite parent, Map<String, Object> data) {\r
  43 \r
  44         final String equation = data.get("equation") != null ? (String)data.get("equation") : "";\r
  45 \r
  46         GridLayoutFactory.fillDefaults().numColumns(2).spacing(3, 3).applyTo(parent);\r
  47         equationLabel = new Label(parent, SWT.NONE);\r
  48         equationLabel.setFont(FONT);\r
  49         equationLabel.setText("=");\r
  50         GridDataFactory.fillDefaults().applyTo(equationLabel);\r
  51 \r
  52 \r
  53         expression = new ExpressionField(parent, SWT.BORDER);\r
  54         expression.setFont(FONT);\r
  55         expression.setExpression(equation);\r
  56         GridDataFactory.fillDefaults().grab(true, true).applyTo(expression);\r
  57     }\r
  58 \r
  59     @Override\r
  60     public void focus() {\r
  61         if(this.expression != null) this.expression.focus();\r
  62     }\r
  63 \r
  64     @Override\r
  65     public void readData(final Resource variable, Map<String, Object> data) {\r
  66         String equation = null;        \r
  67         if (variable != null && data.get("equation") == null) {\r
  68             try {\r
  69                 equation = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
  70 \r
  71                     @Override\r
  72                     public String perform(ReadGraph graph) throws DatabaseException {\r
  73                         SysdynResource sr = SysdynResource.getInstance(graph);\r
  74                         Resource expression = graph.getPossibleObject(variable, sr.HasExpression);\r
  75                         if (expression != null && graph.isInstanceOf(expression, sr.ConstantExpression)) {\r
  76                             return graph.getRelatedValue(expression, sr.HasEquation);\r
  77                         } else {\r
  78                             return "";\r
  79                         }\r
  80                     }\r
  81 \r
  82                 });\r
  83             } catch (DatabaseException e1) {\r
  84                 e1.printStackTrace();\r
  85             }\r
  86             data.put("equation", equation);\r
  87         } \r
  88     }\r
  89 \r
  90     @Override\r
  91     public void replaceSelection(String var) {\r
  92         if(expression != null) {\r
  93             IDocument doc = expression.getDocument();\r
  94             try {\r
  95                 Point selection = expression.getSelection();\r
  96                 doc.replace(selection.x, selection.y, var);\r
  97                 expression.setSelection(selection.x + var.length());\r
  98             } catch (BadLocationException e) {\r
  99                 e.printStackTrace();\r
 100             }\r
 101         }\r
 102     }\r
 103 \r
 104     @Override\r
 105     public void writeData(final Resource variable, Map<String, Object> data) {\r
 106         final String currentText = expression.getExpression();\r
 107         if(currentText != null) {\r
 108             SimanticsUI.getSession().asyncRequest(new WriteRequest() {\r
 109 \r
 110                 @Override\r
 111                 public void perform(WriteGraph g)\r
 112                 throws DatabaseException {\r
 113                     SysdynResource sr = SysdynResource.getInstance(g);\r
 114                     Resource expression = g.getPossibleObject(variable, sr.HasExpression);\r
 115                     Layer0 l0 = Layer0.getInstance(g);\r
 116                     if(expression != null) {\r
 117                         g.deny(variable, sr.HasExpression);\r
 118                     }\r
 119                     expression = g.newResource();\r
 120                     g.claim(expression, l0.InstanceOf, null, sr.ConstantExpression);\r
 121                     g.claim(variable, sr.HasExpression, expression);\r
 122                     g.claimLiteral(expression, sr.HasEquation, currentText);\r
 123                 }\r
 124 \r
 125             });\r
 126         }        \r
 127     }\r
 128 \r
 129     @Override\r
 130     public void updateData(Map<String, Object> data) {\r
 131         if(this.expression != null && this.expression.getExpression() != null)\r
 132             data.put("equation", this.expression.getExpression());        \r
 133     }\r
 134 \r
 135     @Override\r
 136     public List<ExpressionField> getExpressionFields() {\r
 137         return Arrays.asList(this.expression);\r
 138     }\r
 139 \r
 140 }\r