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

   1 package org.simantics.sysdyn.ui.properties.widgets.expressions;\r
   2 \r
   3 import java.util.Arrays;\r
   4 import java.util.Collection;\r
   5 import java.util.List;\r
   6 import java.util.Map;\r
   7 \r
   8 import org.eclipse.jface.layout.GridDataFactory;\r
   9 import org.eclipse.jface.layout.GridLayoutFactory;\r
  10 import org.eclipse.jface.text.BadLocationException;\r
  11 import org.eclipse.jface.text.IDocument;\r
  12 import org.eclipse.swt.SWT;\r
  13 import org.eclipse.swt.events.FocusAdapter;\r
  14 import org.eclipse.swt.events.FocusEvent;\r
  15 import org.eclipse.swt.events.FocusListener;\r
  16 import org.eclipse.swt.events.KeyListener;\r
  17 import org.eclipse.swt.events.ModifyListener;\r
  18 import org.eclipse.swt.graphics.Point;\r
  19 import org.eclipse.swt.widgets.Composite;\r
  20 import org.eclipse.swt.widgets.Label;\r
  21 import org.eclipse.swt.widgets.Text;\r
  22 import org.simantics.db.Builtins;\r
  23 import org.simantics.db.ReadGraph;\r
  24 import org.simantics.db.Resource;\r
  25 import org.simantics.db.WriteGraph;\r
  26 import org.simantics.db.common.request.WriteRequest;\r
  27 import org.simantics.db.exception.DatabaseException;\r
  28 import org.simantics.db.request.Read;\r
  29 import org.simantics.sysdyn.SysdynResource;\r
  30 import org.simantics.ui.SimanticsUI;\r
  31 \r
  32 public class StockExpression implements IExpression {\r
  33 \r
  34     private Text integral;\r
  35     private ExpressionField expression;\r
  36     private Point caretPosition; // Bug or something in source viewer's text widget. Cursor goes to 0, 0 on focus lost\r
  37     \r
  38     @Override\r
  39     public void createExpressionFields(Composite parent, Map<String, Object> data) {\r
  40         GridLayoutFactory.fillDefaults().numColumns(2).applyTo(parent);\r
  41         String initialEquation = data.get("initialEquation") != null ? (String)data.get("initialEquation") : "";\r
  42         String integralEquation = data.get("integral") != null ? (String)data.get("integral") : "";\r
  43 \r
  44         \r
  45         Label label = new Label(parent, SWT.NONE);\r
  46         label.setText("Integral");\r
  47         \r
  48         integral = new Text(parent, SWT.MULTI | SWT.V_SCROLL | SWT.BORDER);\r
  49         integral.setEditable(false);\r
  50         integral.setText(integralEquation);\r
  51         GridDataFactory.fillDefaults().grab(true, true).applyTo(integral);\r
  52         \r
  53         \r
  54         label = new Label(parent, SWT.NONE);\r
  55         label.setText("Initial\nValue");\r
  56         \r
  57         expression = new ExpressionField(parent, SWT.BORDER);\r
  58         expression.setExpression(initialEquation);\r
  59         \r
  60         GridDataFactory.fillDefaults().grab(true, true).applyTo(expression);\r
  61         \r
  62         expression.getSourceViewer().getTextWidget().addFocusListener(new FocusAdapter() {\r
  63 \r
  64             @Override\r
  65             public void focusLost(FocusEvent e) {\r
  66                 caretPosition = expression.getSelection();\r
  67             }\r
  68         });\r
  69         \r
  70     }\r
  71 \r
  72     @Override\r
  73     public void focus() {\r
  74         if(this.expression != null && caretPosition != null) {\r
  75             this.expression.focus();\r
  76             expression.getSourceViewer().getTextWidget().setSelection(caretPosition.x, caretPosition.x + caretPosition.y);\r
  77         }\r
  78         \r
  79     }\r
  80 \r
  81     @Override\r
  82     public List<ExpressionField> getExpressionFields() {\r
  83         return Arrays.asList(this.expression);\r
  84     }\r
  85 \r
  86     @Override\r
  87     public void readData(final Resource variable, Map<String, Object> data) {\r
  88         String initialEquation = null;\r
  89 \r
  90         if (variable != null && data.get("initialEquation") == null) {\r
  91             try {\r
  92                 initialEquation = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
  93 \r
  94                     @Override\r
  95                     public String perform(ReadGraph graph) throws DatabaseException {\r
  96                         SysdynResource sr = SysdynResource.getInstance(graph);\r
  97                         Resource expression = graph.getPossibleObject(variable, sr.HasExpression);\r
  98                         if (expression != null && graph.isInstanceOf(expression, sr.StockExpression)) {\r
  99                             return graph.getRelatedValue(expression, sr.HasInitialEquation);\r
 100                         } else {\r
 101                             return "";\r
 102                         }\r
 103                     }\r
 104 \r
 105                 });\r
 106             } catch (DatabaseException e1) {\r
 107                 e1.printStackTrace();\r
 108             }\r
 109             data.put("initialEquation", initialEquation);\r
 110         }\r
 111 \r
 112         data.put("integral", getIntegral(variable));\r
 113         \r
 114     }\r
 115 \r
 116     @Override\r
 117     public void replaceSelection(String var) {\r
 118         if(expression != null) {\r
 119             IDocument doc = expression.getDocument();\r
 120             try {\r
 121                 Point selection = expression.getSelection();\r
 122                 doc.replace(selection.x, selection.y, var);\r
 123                 expression.setSelection(selection.x + var.length());\r
 124             } catch (BadLocationException e) {\r
 125                 e.printStackTrace();\r
 126             }\r
 127         }\r
 128     }\r
 129 \r
 130     @Override\r
 131     public void save(final Resource variable, Map<String, Object> data) {\r
 132         final String currentText = expression.getExpression();\r
 133         if(currentText != null) {\r
 134             SimanticsUI.getSession().asyncRequest(new WriteRequest() {\r
 135 \r
 136                 @Override\r
 137                 public void perform(WriteGraph g)\r
 138                 throws DatabaseException {\r
 139                     SysdynResource sr = SysdynResource.getInstance(g);\r
 140                     Resource expression = g.getPossibleObject(variable, sr.HasExpression);\r
 141                     Builtins b = g.getBuiltins();\r
 142                     if(expression != null) {\r
 143                         g.deny(variable, sr.HasExpression);\r
 144                     }\r
 145                     expression = g.newResource();\r
 146                     g.claim(expression, b.InstanceOf, null, sr.StockExpression);\r
 147                     g.claim(variable, sr.HasExpression, expression);\r
 148                     g.claimValue(expression, sr.HasInitialEquation, currentText);\r
 149                 }\r
 150 \r
 151             });\r
 152         }\r
 153         expression.setExpression(currentText);\r
 154     }\r
 155 \r
 156     @Override\r
 157     public void updateData(Map<String, Object> data) {\r
 158         if(this.expression != null && this.expression.getExpression() != null)\r
 159             data.put("initialEquation", this.expression.getExpression());\r
 160         if(this.integral != null && this.integral.getText() != null)\r
 161             data.put("integral", this.integral.getText());\r
 162     }\r
 163     \r
 164     \r
 165     private String getIntegral(final Resource variable) {\r
 166         String integral = "";\r
 167         try {\r
 168             integral = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
 169 \r
 170                 @Override\r
 171                 public String perform(ReadGraph graph) throws DatabaseException {\r
 172                     SysdynResource sr = SysdynResource.getInstance(graph);\r
 173                     Builtins b = graph.getBuiltins();\r
 174                     Collection<Resource> heads = graph.getObjects(variable, sr.IsHeadOf);\r
 175                     Collection<Resource> tails = graph.getObjects(variable, sr.IsTailOf);\r
 176 \r
 177                     StringBuilder builder = new StringBuilder();\r
 178                     builder.append("");\r
 179                     for (Resource r : heads) {\r
 180                         if(graph.isInstanceOf(r, sr.Flow)) {\r
 181                             Resource tail = graph.getPossibleObject(r, sr.HasTail);\r
 182                             if(tail != null) {\r
 183                                 Object name = graph.getPossibleRelatedValue(tail, b.HasName);\r
 184                                 if (name != null) \r
 185                                     builder.append(" + " + name);\r
 186                                 \r
 187                             }\r
 188                         }\r
 189                     }\r
 190                     for (Resource r : tails) {\r
 191                         if(graph.isInstanceOf(r, sr.Flow)) {\r
 192                             Resource head = graph.getPossibleObject(r, sr.HasHead);\r
 193                             if(head != null) {\r
 194                                 Object name = graph.getPossibleRelatedValue(head, b.HasName);\r
 195                                 if (name != null)\r
 196                                     builder.append(" - " + name);\r
 197                             }\r
 198                         }\r
 199                     }\r
 200                     if (builder.indexOf(" + ") == 0)\r
 201                         builder.delete(0, 3);\r
 202                     return builder.toString().trim();\r
 203                 }\r
 204 \r
 205             });\r
 206         } catch (DatabaseException e) {\r
 207             e.printStackTrace();\r
 208         }\r
 209         return integral;\r
 210     }\r
 211 \r
 212     @Override\r
 213     public void addKeyListener(KeyListener listener) {\r
 214         this.expression.getSourceViewer().getTextWidget().addKeyListener(listener);\r
 215         \r
 216     }\r
 217 \r
 218     @Override\r
 219     public void addModifyListener(ModifyListener listener) {\r
 220         this.expression.getSourceViewer().getTextWidget().addModifyListener(listener);\r
 221         \r
 222     }\r
 223     \r
 224     @Override\r
 225     public void addFocusListener(FocusListener listener) {\r
 226         this.expression.getSourceViewer().getTextWidget().addFocusListener(listener);\r
 227     }\r
 228 \r
 229 }\r