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.events.KeyAdapter;\r
  11 import org.eclipse.swt.events.KeyEvent;\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 ConstantExpressionViewFactor 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 \r
  38         GridDataFactory.fillDefaults().grab(true, true).applyTo(parent);\r
  39         GridLayoutFactory.fillDefaults().numColumns(2).spacing(3, 3).applyTo(parent);\r
  40         equationLabel = new Label(parent, SWT.NONE);\r
  41         equationLabel.setFont(FONT);\r
  42         equationLabel.setText("=");\r
  43         GridDataFactory.fillDefaults().applyTo(equationLabel);\r
  44 \r
  45 \r
  46         expression = new Text(parent, SWT.MULTI | SWT.V_SCROLL | SWT.BORDER);\r
  47         expression.setFont(FONT);\r
  48         expression.setText(equation);\r
  49         GridDataFactory.fillDefaults().grab(true, true).applyTo(expression);\r
  50 \r
  51         expression.addFocusListener(new FocusAdapter() {\r
  52 \r
  53             @Override\r
  54             public void focusLost(FocusEvent e) {\r
  55                 lastSelection = expression.getSelection();\r
  56             }\r
  57         });\r
  58 \r
  59         expression.addKeyListener(new KeyAdapter() {          \r
  60 \r
  61             @Override\r
  62             public void keyPressed(KeyEvent e) {\r
  63                 if(e.keyCode == SWT.ESC) {\r
  64                     expression.setText(equation);\r
  65                 }\r
  66             }\r
  67 \r
  68         });\r
  69 \r
  70 \r
  71     }\r
  72 \r
  73     @Override\r
  74     public void focus() {\r
  75         if(this.expression != null) this.expression.forceFocus();\r
  76     }\r
  77 \r
  78     @Override\r
  79     public void readData(final Resource variable, Map<String, Object> data) {\r
  80         String equation = null;        \r
  81         if (variable != null && data.get("equation") == null) {\r
  82             try {\r
  83                 equation = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
  84 \r
  85                     @Override\r
  86                     public String perform(ReadGraph graph) throws DatabaseException {\r
  87                         SysdynResource sr = SysdynResource.getInstance(graph);\r
  88                         Resource expression = graph.getPossibleObject(variable, sr.HasExpression);\r
  89                         if (expression != null && graph.isInstanceOf(expression, sr.ConstantExpression)) {\r
  90                             return graph.getRelatedValue(expression, sr.HasEquation);\r
  91                         } else {\r
  92                             return "";\r
  93                         }\r
  94                     }\r
  95 \r
  96                 });\r
  97             } catch (DatabaseException e1) {\r
  98                 e1.printStackTrace();\r
  99             }\r
 100             data.put("equation", equation);\r
 101         } \r
 102     }\r
 103 \r
 104     @Override\r
 105     public void replaceSelection(String var) {\r
 106         if(this.expression != null) {\r
 107             String oldExpression = expression.getText();\r
 108             if(lastSelection == null)\r
 109                 lastSelection = new Point(0,0);\r
 110             String newExpression = oldExpression.substring(0, lastSelection.x) + var + oldExpression.substring(lastSelection.y);\r
 111             expression.setText(newExpression);\r
 112             expression.setSelection(lastSelection.x + var.length());\r
 113         }\r
 114     }\r
 115 \r
 116     @Override\r
 117     public void writeData(final Resource variable, Map<String, Object> data) {\r
 118         final String currentText = expression.getText();\r
 119         if(currentText != null) {\r
 120             SimanticsUI.getSession().asyncRequest(new WriteRequest() {\r
 121 \r
 122                 @Override\r
 123                 public void perform(WriteGraph g)\r
 124                 throws DatabaseException {\r
 125                     SysdynResource sr = SysdynResource.getInstance(g);\r
 126                     Resource expression = g.getPossibleObject(variable, sr.HasExpression);\r
 127                     Builtins b = g.getBuiltins();\r
 128                     if(expression != null) {\r
 129                         g.deny(variable, sr.HasExpression);\r
 130                     }\r
 131                     expression = g.newResource();\r
 132                     g.claim(expression, b.InstanceOf, sr.ConstantExpression);\r
 133                     g.claim(variable, sr.HasExpression, expression);\r
 134                     g.claimValue(expression, sr.HasEquation, currentText);\r
 135                 }\r
 136 \r
 137             });\r
 138         }        \r
 139     }\r
 140 \r
 141     @Override\r
 142     public void updateData(Map<String, Object> data) {\r
 143         if(this.expression != null && this.expression.getText() != null)\r
 144             data.put("equation", this.expression.getText());        \r
 145     }\r
 146 \r
 147 }\r