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

   1 package org.simantics.sysdyn.ui.equation.expressions;\r
   2 \r
   3 import java.util.Arrays;\r
   4 import java.util.List;\r
   5 import java.util.Map;\r
   6 \r
   7 import org.eclipse.jface.layout.GridDataFactory;\r
   8 import org.eclipse.jface.layout.GridLayoutFactory;\r
   9 import org.eclipse.swt.SWT;\r
  10 import org.eclipse.swt.events.FocusAdapter;\r
  11 import org.eclipse.swt.events.FocusEvent;\r
  12 import org.eclipse.swt.graphics.Point;\r
  13 import org.eclipse.swt.widgets.Composite;\r
  14 import org.eclipse.swt.widgets.Label;\r
  15 import org.eclipse.swt.widgets.Text;\r
  16 import org.simantics.db.Builtins;\r
  17 import org.simantics.db.ReadGraph;\r
  18 import org.simantics.db.Resource;\r
  19 import org.simantics.db.WriteGraph;\r
  20 import org.simantics.db.common.request.WriteRequest;\r
  21 import org.simantics.db.exception.DatabaseException;\r
  22 import org.simantics.db.request.Read;\r
  23 import org.simantics.sysdyn.SysdynResource;\r
  24 import org.simantics.ui.SimanticsUI;\r
  25 \r
  26 public class AuxiliaryExpressionViewFactor implements IExpressionViewFactor {\r
  27     \r
  28     private Label equationLabel;\r
  29     private Text expression;\r
  30     private Point lastSelection = new Point(0,0);\r
  31     \r
  32     @Override\r
  33     public void createView(Composite parent, Map<String, Object> data) {\r
  34 \r
  35         final String equation = data.get("equation") != null ? (String)data.get("equation") : "";\r
  36         \r
  37         GridLayoutFactory.fillDefaults().numColumns(2).spacing(3, 3).applyTo(parent);\r
  38         equationLabel = new Label(parent, SWT.NONE);\r
  39         equationLabel.setFont(FONT);\r
  40         equationLabel.setText("=");\r
  41         GridDataFactory.fillDefaults().applyTo(equationLabel);\r
  42 \r
  43 \r
  44         expression = new Text(parent, SWT.MULTI | SWT.V_SCROLL | SWT.BORDER);\r
  45         expression.setFont(FONT);\r
  46         expression.setText(equation);\r
  47         GridDataFactory.fillDefaults().grab(true, true).applyTo(expression);\r
  48 \r
  49         expression.addFocusListener(new FocusAdapter() {\r
  50 \r
  51             @Override\r
  52             public void focusGained(FocusEvent e){\r
  53                 \r
  54             }\r
  55 \r
  56             @Override\r
  57             public void focusLost(FocusEvent e) {\r
  58                 lastSelection = expression.getSelection();      \r
  59             }\r
  60         });\r
  61         \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.NormalExpression)) {\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 writeData(final Resource variable, Map<String, Object> data) {\r
  92         final String currentText = expression.getText();\r
  93         if(currentText != null) {\r
  94             data.put("equation", currentText);\r
  95             SimanticsUI.getSession().asyncRequest(new WriteRequest() {\r
  96                 @Override\r
  97                 public void perform(WriteGraph g)\r
  98                 throws DatabaseException {\r
  99                     SysdynResource sr = SysdynResource.getInstance(g);\r
 100                     Resource expression = g.getPossibleObject(variable, sr.HasExpression);\r
 101                     Builtins b = g.getBuiltins();\r
 102                     if(expression != null) {\r
 103                         g.deny(variable, sr.HasExpression);\r
 104                     }\r
 105                     expression = g.newResource();\r
 106                     g.claim(expression, b.InstanceOf, sr.NormalExpression);\r
 107                     g.claim(variable, sr.HasExpression, expression);\r
 108                     g.claimValue(expression, sr.HasEquation, currentText);\r
 109                 }\r
 110 \r
 111             });\r
 112         }        \r
 113     }\r
 114 \r
 115     @Override\r
 116     public void focus() {\r
 117         if(this.expression != null) this.expression.forceFocus();\r
 118     }\r
 119 \r
 120     @Override\r
 121     public void replaceSelection(String var) {\r
 122         if(this.expression != null) {\r
 123             String oldExpression = expression.getText();\r
 124             if(lastSelection == null)\r
 125                 lastSelection = new Point(0,0);\r
 126             String newExpression = oldExpression.substring(0, lastSelection.x) + var + oldExpression.substring(lastSelection.y);\r
 127             expression.setText(newExpression);\r
 128             expression.setSelection(lastSelection.x + var.length());\r
 129         }\r
 130     }\r
 131 \r
 132     @Override\r
 133     public void updateData(Map<String, Object> data) {\r
 134         if(this.expression != null && this.expression.getText() != null)\r
 135             data.put("equation", this.expression.getText());\r
 136     }\r
 137 \r
 138     @Override\r
 139     public List<Text> getExpressionFields() {\r
 140         return Arrays.asList(this.expression);\r
 141     }\r
 142 }\r