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

   1 package org.simantics.sysdyn.ui.equation.expressions;\r
   2 \r
   3 import java.util.Map;\r
   4 \r
   5 import org.eclipse.jface.layout.GridDataFactory;\r
   6 import org.eclipse.jface.layout.GridLayoutFactory;\r
   7 import org.eclipse.swt.SWT;\r
   8 import org.eclipse.swt.events.FocusAdapter;\r
   9 import org.eclipse.swt.events.FocusEvent;\r
  10 import org.eclipse.swt.graphics.Point;\r
  11 import org.eclipse.swt.widgets.Composite;\r
  12 import org.eclipse.swt.widgets.Label;\r
  13 import org.eclipse.swt.widgets.Text;\r
  14 import org.simantics.db.Builtins;\r
  15 import org.simantics.db.ReadGraph;\r
  16 import org.simantics.db.Resource;\r
  17 import org.simantics.db.WriteGraph;\r
  18 import org.simantics.db.common.request.WriteRequest;\r
  19 import org.simantics.db.exception.DatabaseException;\r
  20 import org.simantics.db.request.Read;\r
  21 import org.simantics.sysdyn.SysdynResource;\r
  22 import org.simantics.ui.SimanticsUI;\r
  23 \r
  24 public class AuxiliaryExpressionViewFactor implements IExpressionViewFactor {\r
  25     \r
  26     private Label equationLabel;\r
  27     private Text expression;\r
  28     private Point lastSelection = new Point(0,0);\r
  29     \r
  30     @Override\r
  31     public void createView(Composite parent, Map<String, Object> data) {\r
  32 \r
  33         final String equation = data.get("equation") != null ? (String)data.get("equation") : "";\r
  34         \r
  35         GridDataFactory.fillDefaults().grab(true, true).applyTo(parent);\r
  36         GridLayoutFactory.fillDefaults().numColumns(2).spacing(3, 3).applyTo(parent);\r
  37         equationLabel = new Label(parent, SWT.NONE);\r
  38         equationLabel.setFont(FONT);\r
  39         equationLabel.setText("=");\r
  40         GridDataFactory.fillDefaults().applyTo(equationLabel);\r
  41 \r
  42 \r
  43         expression = new Text(parent, SWT.MULTI | SWT.V_SCROLL | SWT.BORDER);\r
  44         expression.setFont(FONT);\r
  45         expression.setText(equation);\r
  46         GridDataFactory.fillDefaults().grab(true, true).applyTo(expression);\r
  47 \r
  48         expression.addFocusListener(new FocusAdapter() {\r
  49 \r
  50             @Override\r
  51             public void focusLost(FocusEvent e) {\r
  52                 lastSelection = expression.getSelection();      \r
  53             }\r
  54         });\r
  55         \r
  56         expression.addKeyListener(new ExpressionFieldKeyListener(equation));\r
  57     }\r
  58 \r
  59     @Override\r
  60     public void readData(final Resource variable, Map<String, Object> data) {\r
  61         String equation = null;        \r
  62         if (variable != null && data.get("equation") == null) {\r
  63             try {\r
  64                 equation = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
  65 \r
  66                     @Override\r
  67                     public String perform(ReadGraph graph) throws DatabaseException {\r
  68                         SysdynResource sr = SysdynResource.getInstance(graph);\r
  69                         Resource expression = graph.getPossibleObject(variable, sr.HasExpression);\r
  70                         if (expression != null && graph.isInstanceOf(expression, sr.NormalExpression)) {\r
  71                             return graph.getRelatedValue(expression, sr.HasEquation);\r
  72                         } else {\r
  73                             return "";\r
  74                         }\r
  75                     }\r
  76 \r
  77                 });\r
  78             } catch (DatabaseException e1) {\r
  79                 e1.printStackTrace();\r
  80             }\r
  81             data.put("equation", equation);\r
  82         }         \r
  83     }\r
  84 \r
  85     @Override\r
  86     public void writeData(final Resource variable, Map<String, Object> data) {\r
  87         final String currentText = expression.getText();\r
  88         if(currentText != null) {\r
  89             data.put("equation", currentText);\r
  90             SimanticsUI.getSession().asyncRequest(new WriteRequest() {\r
  91                 @Override\r
  92                 public void perform(WriteGraph g)\r
  93                 throws DatabaseException {\r
  94                     SysdynResource sr = SysdynResource.getInstance(g);\r
  95                     Resource expression = g.getPossibleObject(variable, sr.HasExpression);\r
  96                     Builtins b = g.getBuiltins();\r
  97                     if(expression != null) {\r
  98                         g.deny(variable, sr.HasExpression);\r
  99                     }\r
 100                     expression = g.newResource();\r
 101                     g.claim(expression, b.InstanceOf, sr.NormalExpression);\r
 102                     g.claim(variable, sr.HasExpression, expression);\r
 103                     g.claimValue(expression, sr.HasEquation, currentText);\r
 104                 }\r
 105 \r
 106             });\r
 107         }        \r
 108     }\r
 109 \r
 110     @Override\r
 111     public void focus() {\r
 112         if(this.expression != null) this.expression.forceFocus();\r
 113     }\r
 114 \r
 115     @Override\r
 116     public void replaceSelection(String var) {\r
 117         if(this.expression != null) {\r
 118             String oldExpression = expression.getText();\r
 119             if(lastSelection == null)\r
 120                 lastSelection = new Point(0,0);\r
 121             String newExpression = oldExpression.substring(0, lastSelection.x) + var + oldExpression.substring(lastSelection.y);\r
 122             expression.setText(newExpression);\r
 123             expression.setSelection(lastSelection.x + var.length());\r
 124         }\r
 125     }\r
 126 \r
 127     @Override\r
 128     public void updateData(Map<String, Object> data) {\r
 129         if(this.expression != null && this.expression.getText() != null)\r
 130             data.put("equation", this.expression.getText());\r
 131     }\r
 132 }\r