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.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.jface.text.BadLocationException;\r
  10 import org.eclipse.jface.text.IDocument;\r
  11 import org.eclipse.swt.SWT;\r
  12 import org.eclipse.swt.events.FocusAdapter;\r
  13 import org.eclipse.swt.events.FocusEvent;\r
  14 import org.eclipse.swt.events.FocusListener;\r
  15 import org.eclipse.swt.events.KeyListener;\r
  16 import org.eclipse.swt.events.ModifyListener;\r
  17 import org.eclipse.swt.graphics.Point;\r
  18 import org.eclipse.swt.widgets.Composite;\r
  19 import org.eclipse.swt.widgets.Label;\r
  20 import org.simantics.db.Builtins;\r
  21 import org.simantics.db.ReadGraph;\r
  22 import org.simantics.db.Resource;\r
  23 import org.simantics.db.WriteGraph;\r
  24 import org.simantics.db.common.request.WriteRequest;\r
  25 import org.simantics.db.exception.DatabaseException;\r
  26 import org.simantics.db.request.Read;\r
  27 import org.simantics.sysdyn.SysdynResource;\r
  28 import org.simantics.ui.SimanticsUI;\r
  29 \r
  30 public class BasicExpression implements IExpression {\r
  31     \r
  32     private ExpressionField expression;\r
  33     protected Resource expressionType;\r
  34     private Point caretPosition; // Bug or something in source viewer's text widget. Cursor goes to 0, 0 on focus lost\r
  35     \r
  36     @Override\r
  37     public void createExpressionFields(Composite parent, Map<String, Object> data) {\r
  38         GridLayoutFactory.fillDefaults().numColumns(2).applyTo(parent);\r
  39         String equation = data.get("equation") != null ? (String)data.get("equation") : "";\r
  40         \r
  41         Label l = new Label(parent, SWT.NONE);\r
  42         l.setText("=");\r
  43         \r
  44         expression = new ExpressionField(parent, SWT.BORDER);\r
  45         expression.setExpression(equation);\r
  46         GridDataFactory.fillDefaults().grab(true, true).applyTo(expression);\r
  47         \r
  48         expression.getSourceViewer().getTextWidget().addFocusListener(new FocusAdapter() {\r
  49 \r
  50             @Override\r
  51             public void focusLost(FocusEvent e) {\r
  52                 caretPosition = expression.getSelection();\r
  53             }\r
  54         });\r
  55     }\r
  56 \r
  57     @Override\r
  58     public void focus() {\r
  59         if(this.expression != null && caretPosition != null) {\r
  60             this.expression.focus();\r
  61             expression.getSourceViewer().getTextWidget().setSelection(caretPosition.x, caretPosition.x + caretPosition.y);\r
  62         }\r
  63         \r
  64     }\r
  65 \r
  66     @Override\r
  67     public List<ExpressionField> getExpressionFields() {\r
  68         return Arrays.asList(this.expression);\r
  69     }\r
  70 \r
  71     @Override\r
  72     public void readData(final Resource variable, Map<String, Object> data) {\r
  73         String equation = null;\r
  74         if (variable != null && data.get("equation") == null && expressionType != null) {\r
  75             try {\r
  76                 equation = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
  77 \r
  78                     @Override\r
  79                     public String perform(ReadGraph graph) throws DatabaseException {\r
  80                         SysdynResource sr = SysdynResource.getInstance(graph);\r
  81                         Resource expression = graph.getPossibleObject(variable, sr.HasExpression);\r
  82                         if (expression != null && graph.isInstanceOf(expression, expressionType)) {\r
  83                             return graph.getRelatedValue(expression, sr.HasEquation);\r
  84                         } else {\r
  85                             return "";\r
  86                         }\r
  87                     }\r
  88 \r
  89                 });\r
  90             } catch (DatabaseException e1) {\r
  91                 e1.printStackTrace();\r
  92             }\r
  93             data.put("equation", equation);\r
  94         }\r
  95     }\r
  96 \r
  97     @Override\r
  98     public void replaceSelection(String var) {\r
  99         if(expression != null) {\r
 100             IDocument doc = expression.getDocument();\r
 101             try {\r
 102                 Point selection = expression.getSelection();\r
 103                 doc.replace(selection.x, selection.y, var);\r
 104                 expression.setSelection(selection.x + var.length());\r
 105             } catch (BadLocationException e) {\r
 106                 e.printStackTrace();\r
 107             }\r
 108         }\r
 109     }\r
 110 \r
 111     @Override\r
 112     public void save(final Resource variable, Map<String, Object> data) {\r
 113         final String currentText = expression.getExpression();\r
 114         if(currentText != null && expressionType != null) {\r
 115             data.put("equation", currentText);\r
 116             SimanticsUI.getSession().asyncRequest(new WriteRequest() {\r
 117                 @Override\r
 118                 public void perform(WriteGraph g)\r
 119                 throws DatabaseException {\r
 120                     SysdynResource sr = SysdynResource.getInstance(g);\r
 121                     Resource expression = g.getPossibleObject(variable, sr.HasExpression);\r
 122                     Builtins b = g.getBuiltins();\r
 123                     if(expression != null) {\r
 124                         g.deny(variable, sr.HasExpression);\r
 125                     }\r
 126                     expression = g.newResource();\r
 127                     g.claim(expression, b.InstanceOf, null, expressionType);\r
 128                     g.claim(variable, sr.HasExpression, expression);\r
 129                     g.claimValue(expression, sr.HasEquation, currentText);\r
 130                 }\r
 131 \r
 132             });\r
 133         }\r
 134         expression.setExpression(currentText);\r
 135     }\r
 136 \r
 137     @Override\r
 138     public void updateData(Map<String, Object> data) {\r
 139         if(this.expression != null && this.expression.getExpression() != null)\r
 140             data.put("equation", this.expression.getExpression());\r
 141     }\r
 142 \r
 143     @Override\r
 144     public void addKeyListener(KeyListener listener) {\r
 145         this.expression.getSourceViewer().getTextWidget().addKeyListener(listener);\r
 146         \r
 147     }\r
 148 \r
 149     @Override\r
 150     public void addModifyListener(ModifyListener listener) {\r
 151         this.expression.getSourceViewer().getTextWidget().addModifyListener(listener);\r
 152         \r
 153     }\r
 154     \r
 155     @Override\r
 156     public void addFocusListener(FocusListener listener) {\r
 157         this.expression.getSourceViewer().getTextWidget().addFocusListener(listener);\r
 158     }\r
 159 }\r