bundles/org.simantics.document.swt.core/src/org/simantics/document/swt/core/widget/ComboWidget.java

   1 package org.simantics.document.swt.core.widget;\r
   2 \r
   3 import java.util.Arrays;\r
   4 import java.util.List;\r
   5 \r
   6 import org.eclipse.swt.SWT;\r
   7 import org.eclipse.swt.events.ModifyEvent;\r
   8 import org.eclipse.swt.events.ModifyListener;\r
   9 import org.eclipse.swt.widgets.Combo;\r
  10 import org.eclipse.swt.widgets.Composite;\r
  11 import org.simantics.document.server.JSONObject;\r
  12 import org.simantics.document.server.handler.AbstractEventHandler;\r
  13 import org.simantics.document.server.io.CommandContextImpl;\r
  14 import org.simantics.document.swt.core.SWTDocument;\r
  15 import org.simantics.document.swt.core.base.LeafWidgetManager;\r
  16 import org.simantics.document.swt.core.bean.StringList;\r
  17 \r
  18 public class ComboWidget extends LeafWidgetManager<Combo> {\r
  19         \r
  20         private ModifyListener modifyListener = null;\r
  21 \r
  22         private StringList extractAvailable(Object o) {\r
  23                 if(o instanceof StringList) return (StringList)o;\r
  24                 if(o instanceof List) return new StringList((List)o);\r
  25                 if(o instanceof String[]) return new StringList((String[])o);\r
  26                 throw new IllegalArgumentException("Unaccepted format for available " + o.getClass().getName());\r
  27         }\r
  28         \r
  29         @Override\r
  30         protected void doUpdateProperties(SWTDocument document, Combo combo, JSONObject object) {\r
  31 \r
  32                 if(combo.isDisposed()) return;\r
  33                 \r
  34                 if(modifyListener != null)\r
  35                         combo.removeModifyListener(modifyListener);\r
  36                 \r
  37                 StringList availableList = extractAvailable(object.getJSONField("available"));\r
  38                 String selected = object.getJSONField("selected");\r
  39 \r
  40                 String[] available = availableList.strings;\r
  41                 String[] current = combo.getItems();\r
  42                 \r
  43                 if(!Arrays.equals(available, current)) {\r
  44                 combo.clearSelection();\r
  45                 combo.removeAll();\r
  46                 for(String key : available) {\r
  47                         combo.add(key);\r
  48                 }\r
  49                 }\r
  50                 \r
  51                 int index = 0;\r
  52                 for(;index<available.length;index++) if(available[index].equals(selected)) break;\r
  53 \r
  54                 if(index == available.length) {\r
  55                         combo.clearSelection();\r
  56                 } else {\r
  57                         combo.select(index);\r
  58                 }\r
  59 \r
  60                 if(modifyListener != null)\r
  61                         combo.addModifyListener(modifyListener);\r
  62 \r
  63         }\r
  64 \r
  65         @Override\r
  66         protected Combo doCreateControl(final SWTDocument document, Composite parent, JSONObject object) {\r
  67                 final Combo combo = new Combo(parent, SWT.READ_ONLY);\r
  68                 final AbstractEventHandler onModify = object.getJSONField("onModify");\r
  69                 if(onModify != null) {\r
  70                         modifyListener = new ModifyListener() {\r
  71                                 \r
  72                                 @Override\r
  73                                 public void modifyText(ModifyEvent e) {\r
  74                                         String[] items = combo.getItems();\r
  75                                         int index = combo.getSelectionIndex();\r
  76                                         if(index >=0 && index < items.length) {\r
  77                                 CommandContextImpl parameters = new CommandContextImpl();\r
  78                                 parameters.putString("selected", items[index]);\r
  79                                                 document.post(onModify, parameters);\r
  80                                         }\r
  81                                         \r
  82                                 }\r
  83                                 \r
  84                         };\r
  85                         combo.addModifyListener(modifyListener);\r
  86                 }\r
  87                 return combo;\r
  88         }\r
  89         \r
  90 }\r