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

   1 package org.simantics.sysdyn.ui.equation.expressions;\r
   2 \r
   3 import java.util.Collection;\r
   4 import java.util.Map;\r
   5 \r
   6 import org.eclipse.jface.layout.GridDataFactory;\r
   7 import org.eclipse.jface.layout.GridLayoutFactory;\r
   8 import org.eclipse.swt.SWT;\r
   9 import org.eclipse.swt.events.FocusAdapter;\r
  10 import org.eclipse.swt.events.FocusEvent;\r
  11 import org.eclipse.swt.events.KeyAdapter;\r
  12 import org.eclipse.swt.events.KeyEvent;\r
  13 import org.eclipse.swt.graphics.Point;\r
  14 import org.eclipse.swt.widgets.Composite;\r
  15 import org.eclipse.swt.widgets.Label;\r
  16 import org.eclipse.swt.widgets.Text;\r
  17 import org.simantics.db.Builtins;\r
  18 import org.simantics.db.ReadGraph;\r
  19 import org.simantics.db.Resource;\r
  20 import org.simantics.db.WriteGraph;\r
  21 import org.simantics.db.common.request.WriteRequest;\r
  22 import org.simantics.db.exception.DatabaseException;\r
  23 import org.simantics.db.request.Read;\r
  24 import org.simantics.sysdyn.SysdynResource;\r
  25 import org.simantics.ui.SimanticsUI;\r
  26 \r
  27 public class StockExpressionViewFactor implements IExpressionViewFactor {\r
  28 \r
  29     Label integralLabel;\r
  30     Text integral;\r
  31     Label equationLabel;\r
  32     Text expression;\r
  33     Point lastSelection = new Point(0,0);\r
  34 \r
  35     @Override\r
  36     public void createView(Composite parent, Map<String, Object> data) {\r
  37 \r
  38         final String initialEquation = data.get("initialEquation") != null ? (String)data.get("initialEquation") : "";\r
  39         final String integralEquation = data.get("integral") != null ? (String)data.get("integral") : "";\r
  40 \r
  41         GridDataFactory.fillDefaults().grab(true, true).applyTo(parent);\r
  42         GridLayoutFactory.fillDefaults().numColumns(2).spacing(3, 3).applyTo(parent);\r
  43 \r
  44         integralLabel = new Label(parent, SWT.NONE);\r
  45         integralLabel.setFont(FONT);\r
  46         integralLabel.setText("Integral");\r
  47         GridDataFactory.fillDefaults().applyTo(integralLabel);\r
  48 \r
  49         integral = new Text(parent, SWT.MULTI | SWT.V_SCROLL | SWT.BORDER);\r
  50         integral.setEditable(false);\r
  51         integral.setFont(FONT);\r
  52         integral.setText(integralEquation);\r
  53         GridDataFactory.fillDefaults().grab(true, true).applyTo(integral);\r
  54 \r
  55         equationLabel = new Label(parent, SWT.NONE);\r
  56         equationLabel.setFont(FONT);\r
  57         equationLabel.setText("Initial\nValue");\r
  58         GridDataFactory.fillDefaults().applyTo(equationLabel);\r
  59 \r
  60 \r
  61         expression = new Text(parent, SWT.MULTI | SWT.V_SCROLL | SWT.BORDER);\r
  62         expression.setFont(FONT);\r
  63         expression.setText(initialEquation);\r
  64         GridDataFactory.fillDefaults().grab(true, true).applyTo(expression);\r
  65 \r
  66         expression.addFocusListener(new FocusAdapter() {\r
  67 \r
  68             @Override\r
  69             public void focusLost(FocusEvent e) {\r
  70                 lastSelection = expression.getSelection();\r
  71             }\r
  72         });\r
  73 \r
  74         expression.addKeyListener(new KeyAdapter() {          \r
  75 \r
  76             @Override\r
  77             public void keyPressed(KeyEvent e) {\r
  78                 if(e.keyCode == SWT.ESC) {\r
  79                     expression.setText(initialEquation);\r
  80                 }                \r
  81             }\r
  82 \r
  83         });\r
  84 \r
  85     }\r
  86 \r
  87     @Override\r
  88     public void readData(final Resource variable, Map<String, Object> data) {\r
  89         String initialEquation = null;\r
  90 \r
  91         if (variable != null && data.get("initialEquation") == null) {\r
  92             try {\r
  93                 initialEquation = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
  94 \r
  95                     @Override\r
  96                     public String perform(ReadGraph graph) throws DatabaseException {\r
  97                         SysdynResource sr = SysdynResource.getInstance(graph);\r
  98                         Resource expression = graph.getPossibleObject(variable, sr.HasExpression);\r
  99                         if (expression != null && graph.isInstanceOf(expression, sr.StockExpression)) {\r
 100                             return graph.getRelatedValue(expression, sr.HasInitialEquation);\r
 101                         } else {\r
 102                             return "";\r
 103                         }\r
 104                     }\r
 105 \r
 106                 });\r
 107             } catch (DatabaseException e1) {\r
 108                 e1.printStackTrace();\r
 109             }\r
 110             data.put("initialEquation", initialEquation);\r
 111         } \r
 112 \r
 113         data.put("integral", getIntegral(variable));\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.StockExpression);\r
 133                     g.claim(variable, sr.HasExpression, expression);\r
 134                     g.claimValue(expression, sr.HasInitialEquation, currentText);\r
 135                 }\r
 136 \r
 137             });\r
 138         }        \r
 139     }\r
 140 \r
 141     private String getIntegral(final Resource variable) {\r
 142         String integral = "";\r
 143         try {\r
 144             integral = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
 145 \r
 146                 @Override\r
 147                 public String perform(ReadGraph graph) throws DatabaseException {\r
 148                     SysdynResource sr = SysdynResource.getInstance(graph);\r
 149                     Builtins b = graph.getBuiltins();\r
 150                     Collection<Resource> heads = graph.getObjects(variable, sr.IsHeadOf);\r
 151                     Collection<Resource> tails = graph.getObjects(variable, sr.IsTailOf);\r
 152 \r
 153                     StringBuilder builder = new StringBuilder();\r
 154                     builder.append("");\r
 155                     for (Resource r : heads) {\r
 156                         if(graph.isInstanceOf(r, sr.Flow)) {\r
 157                             Resource tail = graph.getPossibleObject(r, sr.HasTail);\r
 158                             if(tail != null) {\r
 159                                 Object name = graph.getPossibleRelatedValue(tail, b.HasName);\r
 160                                 if (name != null) \r
 161                                     builder.append(" + " + name);\r
 162                             }\r
 163                         }  \r
 164                     }\r
 165                     for (Resource r : tails) {\r
 166                         if(graph.isInstanceOf(r, sr.Flow)) {\r
 167                             Resource head = graph.getPossibleObject(r, sr.HasHead);\r
 168                             if(head != null) {\r
 169                                 Object name = graph.getPossibleRelatedValue(head, b.HasName);\r
 170                                 if (name != null) \r
 171                                     builder.append(" - " + name);\r
 172                             }\r
 173                         }  \r
 174                     }\r
 175                     if (builder.indexOf(" + ") == 0)\r
 176                         builder.delete(0, 3);\r
 177                     return builder.toString().trim();\r
 178                 }\r
 179 \r
 180             });\r
 181         } catch (DatabaseException e) {\r
 182             e.printStackTrace();\r
 183         }      \r
 184         return integral;\r
 185     }\r
 186 \r
 187     @Override\r
 188     public void focus() {\r
 189         if(this.expression != null) this.expression.forceFocus();\r
 190     }\r
 191 \r
 192     @Override\r
 193     public void replaceSelection(String var) {\r
 194         if(this.expression != null) {\r
 195             String oldExpression = expression.getText();\r
 196             if(lastSelection == null)\r
 197                 lastSelection = new Point(0,0);\r
 198             String newExpression = oldExpression.substring(0, lastSelection.x) + var + oldExpression.substring(lastSelection.y);\r
 199             expression.setText(newExpression);      \r
 200             expression.setSelection(lastSelection.x + var.length());\r
 201         }\r
 202 \r
 203     }\r
 204 \r
 205 \r
 206 }\r