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

   1 package org.simantics.sysdyn.ui.properties.widgets.arrays;\r
   2 \r
   3 \r
   4 import java.util.ArrayList;\r
   5 import java.util.List;\r
   6 \r
   7 import org.eclipse.swt.SWT;\r
   8 import org.eclipse.swt.events.SelectionAdapter;\r
   9 import org.eclipse.swt.events.SelectionEvent;\r
  10 import org.eclipse.swt.widgets.Combo;\r
  11 import org.eclipse.swt.widgets.Composite;\r
  12 import org.simantics.browsing.ui.NodeContext;\r
  13 import org.simantics.browsing.ui.common.modifiers.EnumeratedValue;\r
  14 import org.simantics.browsing.ui.common.modifiers.Enumeration;\r
  15 import org.simantics.browsing.ui.content.Labeler.CustomModifier;\r
  16 import org.simantics.db.Session;\r
  17 import org.simantics.db.WriteGraph;\r
  18 import org.simantics.db.common.request.WriteRequest;\r
  19 import org.simantics.db.exception.DatabaseException;\r
  20 import org.simantics.utils.ObjectUtils;\r
  21 \r
  22 public abstract class ComboBoxModifier<T> implements CustomModifier {\r
  23 \r
  24         private final Enumeration<T> enumeration;\r
  25         private final EnumeratedValue<T> value;\r
  26         private final List<String> values;\r
  27         private final Session session;\r
  28         private Combo combo;\r
  29         int select;\r
  30 \r
  31         public ComboBoxModifier(Session session, Enumeration<T> enumeration, T value) {\r
  32                 this(session, enumeration, enumeration.find(value));\r
  33         }\r
  34 \r
  35         public ComboBoxModifier(Session session, Enumeration<T> enumeration,\r
  36                         EnumeratedValue<T> value) {\r
  37                 if (session == null)\r
  38                         throw new NullPointerException("null session");\r
  39                 if (enumeration == null)\r
  40                         throw new NullPointerException("null enumeration");\r
  41                 if (enumeration.size() == 0)\r
  42                         throw new IllegalArgumentException("");\r
  43 \r
  44                 this.enumeration = enumeration;\r
  45                 this.value = value;\r
  46                 this.session = session;\r
  47 \r
  48                 select = 0;\r
  49                 boolean found = false;\r
  50                 \r
  51                 this.values = new ArrayList<String>();\r
  52                 for (EnumeratedValue<T> v : enumeration.values()) {\r
  53                         values.add(v.getName());\r
  54                         \r
  55                         if(v == value) \r
  56                                 found = true;\r
  57                         \r
  58                         if(found == false)\r
  59                                 select++;\r
  60                 }\r
  61         }\r
  62 \r
  63         @Override\r
  64         public Object createControl(Object parentControl, Object controlItem,\r
  65                         int columnIndex, NodeContext context) {\r
  66 \r
  67                 combo = new Combo((Composite) parentControl, SWT.DROP_DOWN\r
  68                                 | SWT.BORDER | SWT.READ_ONLY);\r
  69 \r
  70                 for (String item : values) {\r
  71                         combo.add(item);\r
  72                 }\r
  73                 \r
  74                 combo.addSelectionListener(new SelectionAdapter() {\r
  75                         @Override\r
  76                         public void widgetSelected(SelectionEvent e) {\r
  77                                 String index = ((Combo) e.getSource()).getText();\r
  78                                 modify(index);\r
  79                         }\r
  80                 });\r
  81                 \r
  82                 combo.select(select);\r
  83                 \r
  84                 return combo;\r
  85 \r
  86         }\r
  87 \r
  88         @Override\r
  89         public String getValue() {\r
  90                 return enumeration.values().get(0).getName();\r
  91         }\r
  92 \r
  93     @Override\r
  94     public final String isValid(String label) {\r
  95         if (enumeration.findByName(label) == null)\r
  96             return "Value '" + label + "' is not among the enumerated values " + enumeration.values();\r
  97         return null;\r
  98     }\r
  99 \r
 100         @Override\r
 101         public void modify(String label) {\r
 102                 \r
 103         int index = values.indexOf(label);\r
 104         if (index == -1)\r
 105             throw new IllegalArgumentException("Cannot modify enumeration with value '" + label + "', not among the enumerated values " + values);\r
 106                 \r
 107         EnumeratedValue<T> oldEnumValue = value;\r
 108         EnumeratedValue<T> newEnumValue = enumeration.values().get(index);\r
 109         \r
 110         final T oldObject = oldEnumValue != null ? oldEnumValue.getObject() : null;\r
 111         final T newObject = newEnumValue != null ? newEnumValue.getObject() : null;\r
 112         \r
 113         if (ObjectUtils.objectEquals(oldObject, newObject))\r
 114             return;\r
 115 \r
 116         try {\r
 117             session.getSession().syncRequest(new WriteRequest() {\r
 118                 @Override\r
 119                 public void perform(WriteGraph graph) throws DatabaseException {\r
 120                     modifyWithObject(graph, oldObject, newObject);\r
 121                 }\r
 122             });\r
 123         } catch (DatabaseException e) {\r
 124             handleException(e);\r
 125         }\r
 126         \r
 127                 combo.dispose();                \r
 128         }\r
 129         \r
 130         protected abstract void modifyWithObject(WriteGraph graph, T oldEnumObject, T enumObject) throws DatabaseException;\r
 131         \r
 132     protected void handleException(DatabaseException e) {\r
 133         throw new RuntimeException(e);\r
 134     }\r
 135 \r
 136 }\r