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.simantics.db.Builtins;\r
  16 import org.simantics.db.ReadGraph;\r
  17 import org.simantics.db.Resource;\r
  18 import org.simantics.db.WriteGraph;\r
  19 import org.simantics.db.common.request.WriteRequest;\r
  20 import org.simantics.db.exception.DatabaseException;\r
  21 import org.simantics.db.request.Read;\r
  22 import org.simantics.sysdyn.SysdynResource;\r
  23 import org.simantics.ui.SimanticsUI;\r
  24 \r
  25 public class AuxiliaryExpressionViewFactor implements IExpressionViewFactor {\r
  26     \r
  27     private Label equationLabel;\r
  28     private ExpressionField expression;\r
  29     private Point lastSelection = new Point(0,0);\r
  30     \r
  31     @Override\r
  32     public void createView(Composite parent, Map<String, Object> data) {\r
  33 \r
  34         final String equation = data.get("equation") != null ? (String)data.get("equation") : "";\r
  35         \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 ExpressionField(parent, SWT.BORDER);\r
  44         expression.setFont(FONT);\r
  45         expression.setExpression(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 focusGained(FocusEvent e){\r
  52                 \r
  53             }\r
  54 \r
  55             @Override\r
  56             public void focusLost(FocusEvent e) {\r
  57                 lastSelection = expression.getSelection();      \r
  58             }\r
  59         });\r
  60         \r
  61     }\r
  62 \r
  63     @Override\r
  64     public void readData(final Resource variable, Map<String, Object> data) {\r
  65         String equation = null;        \r
  66         if (variable != null && data.get("equation") == null) {\r
  67             try {\r
  68                 equation = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
  69 \r
  70                     @Override\r
  71                     public String perform(ReadGraph graph) throws DatabaseException {\r
  72                         SysdynResource sr = SysdynResource.getInstance(graph);\r
  73                         Resource expression = graph.getPossibleObject(variable, sr.HasExpression);\r
  74                         if (expression != null && graph.isInstanceOf(expression, sr.NormalExpression)) {\r
  75                             return graph.getRelatedValue(expression, sr.HasEquation);\r
  76                         } else {\r
  77                             return "";\r
  78                         }\r
  79                     }\r
  80 \r
  81                 });\r
  82             } catch (DatabaseException e1) {\r
  83                 e1.printStackTrace();\r
  84             }\r
  85             data.put("equation", equation);\r
  86         }         \r
  87     }\r
  88 \r
  89     @Override\r
  90     public void writeData(final Resource variable, Map<String, Object> data) {\r
  91         final String currentText = expression.getExpression();\r
  92         if(currentText != null) {\r
  93             data.put("equation", currentText);\r
  94             SimanticsUI.getSession().asyncRequest(new WriteRequest() {\r
  95                 @Override\r
  96                 public void perform(WriteGraph g)\r
  97                 throws DatabaseException {\r
  98                     SysdynResource sr = SysdynResource.getInstance(g);\r
  99                     Resource expression = g.getPossibleObject(variable, sr.HasExpression);\r
 100                     Builtins b = g.getBuiltins();\r
 101                     if(expression != null) {\r
 102                         g.deny(variable, sr.HasExpression);\r
 103                     }\r
 104                     expression = g.newResource();\r
 105                     g.claim(expression, b.InstanceOf, sr.NormalExpression);\r
 106                     g.claim(variable, sr.HasExpression, expression);\r
 107                     g.claimValue(expression, sr.HasEquation, currentText);\r
 108                 }\r
 109 \r
 110             });\r
 111         }        \r
 112     }\r
 113 \r
 114     @Override\r
 115     public void focus() {\r
 116         if(this.expression != null) this.expression.forceFocus();\r
 117     }\r
 118 \r
 119     @Override\r
 120     public void replaceSelection(String var) {\r
 121         if(this.expression != null) {\r
 122             String oldExpression = expression.getExpression();\r
 123             if(lastSelection == null)\r
 124                 lastSelection = new Point(0,0);\r
 125             String newExpression = oldExpression.substring(0, lastSelection.x) + var + oldExpression.substring(lastSelection.y);\r
 126             expression.setExpression(newExpression);\r
 127             expression.setSelection(lastSelection.x + var.length());\r
 128         }\r
 129     }\r
 130 \r
 131     @Override\r
 132     public void updateData(Map<String, Object> data) {\r
 133         if(this.expression != null && this.expression.getExpression() != null)\r
 134             data.put("equation", this.expression.getExpression());\r
 135     }\r
 136 \r
 137     @Override\r
 138     public List<ExpressionField> getExpressionFields() {\r
 139         return Arrays.asList(this.expression);\r
 140     }\r
 141 }\r