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