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 ConstantExpressionViewFactor 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 \r
  36         GridDataFactory.fillDefaults().grab(true, true).applyTo(parent);\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 focusLost(FocusEvent e) {\r
  53                 lastSelection = expression.getSelection();\r
  54             }\r
  55         });\r
  56 \r
  57         expression.addKeyListener(new ExpressionFieldKeyListener(equation));\r
  58 \r
  59 \r
  60     }\r
  61 \r
  62     @Override\r
  63     public void focus() {\r
  64         if(this.expression != null) this.expression.forceFocus();\r
  65     }\r
  66 \r
  67     @Override\r
  68     public void readData(final Resource variable, Map<String, Object> data) {\r
  69         String equation = null;        \r
  70         if (variable != null && data.get("equation") == null) {\r
  71             try {\r
  72                 equation = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
  73 \r
  74                     @Override\r
  75                     public String perform(ReadGraph graph) throws DatabaseException {\r
  76                         SysdynResource sr = SysdynResource.getInstance(graph);\r
  77                         Resource expression = graph.getPossibleObject(variable, sr.HasExpression);\r
  78                         if (expression != null && graph.isInstanceOf(expression, sr.ConstantExpression)) {\r
  79                             return graph.getRelatedValue(expression, sr.HasEquation);\r
  80                         } else {\r
  81                             return "";\r
  82                         }\r
  83                     }\r
  84 \r
  85                 });\r
  86             } catch (DatabaseException e1) {\r
  87                 e1.printStackTrace();\r
  88             }\r
  89             data.put("equation", equation);\r
  90         } \r
  91     }\r
  92 \r
  93     @Override\r
  94     public void replaceSelection(String var) {\r
  95         if(this.expression != null) {\r
  96             String oldExpression = expression.getText();\r
  97             if(lastSelection == null)\r
  98                 lastSelection = new Point(0,0);\r
  99             String newExpression = oldExpression.substring(0, lastSelection.x) + var + oldExpression.substring(lastSelection.y);\r
 100             expression.setText(newExpression);\r
 101             expression.setSelection(lastSelection.x + var.length());\r
 102         }\r
 103     }\r
 104 \r
 105     @Override\r
 106     public void writeData(final Resource variable, Map<String, Object> data) {\r
 107         final String currentText = expression.getText();\r
 108         if(currentText != null) {\r
 109             SimanticsUI.getSession().asyncRequest(new WriteRequest() {\r
 110 \r
 111                 @Override\r
 112                 public void perform(WriteGraph g)\r
 113                 throws DatabaseException {\r
 114                     SysdynResource sr = SysdynResource.getInstance(g);\r
 115                     Resource expression = g.getPossibleObject(variable, sr.HasExpression);\r
 116                     Builtins b = g.getBuiltins();\r
 117                     if(expression != null) {\r
 118                         g.deny(variable, sr.HasExpression);\r
 119                     }\r
 120                     expression = g.newResource();\r
 121                     g.claim(expression, b.InstanceOf, sr.ConstantExpression);\r
 122                     g.claim(variable, sr.HasExpression, expression);\r
 123                     g.claimValue(expression, sr.HasEquation, currentText);\r
 124                 }\r
 125 \r
 126             });\r
 127         }        \r
 128     }\r
 129 \r
 130     @Override\r
 131     public void updateData(Map<String, Object> data) {\r
 132         if(this.expression != null && this.expression.getText() != null)\r
 133             data.put("equation", this.expression.getText());        \r
 134     }\r
 135 \r
 136 }\r