bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/widgets/Combo.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2012 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.browsing.ui.swt.widgets;\r
  13 \r
  14 import java.util.List;\r
  15 import java.util.Map;\r
  16 import java.util.concurrent.CopyOnWriteArrayList;\r
  17 import java.util.concurrent.atomic.AtomicBoolean;\r
  18 \r
  19 import org.eclipse.swt.events.ModifyListener;\r
  20 import org.eclipse.swt.widgets.Composite;\r
  21 import org.eclipse.swt.widgets.Control;\r
  22 import org.eclipse.swt.widgets.Display;\r
  23 import org.simantics.browsing.ui.swt.widgets.impl.ReadFactory;\r
  24 import org.simantics.browsing.ui.swt.widgets.impl.Widget;\r
  25 import org.simantics.browsing.ui.swt.widgets.impl.WidgetSupport;\r
  26 import org.simantics.db.management.ISessionContext;\r
  27 import org.simantics.db.procedure.Listener;\r
  28 import org.simantics.utils.datastructures.Pair;\r
  29 \r
  30 public class Combo extends WidgetImpl {\r
  31 \r
  32     private ReadFactory<?, Map<String, Object>> itemFactory;\r
  33     private ReadFactory<?, List<Pair<String, Object>>> itemFactory2;\r
  34     private ReadFactory<?, String> selectionFactory;\r
  35     private final CopyOnWriteArrayList<ModifyListener> modifyListeners = new CopyOnWriteArrayList<ModifyListener>();\r
  36     private List<Pair<String, Object>> itemList;\r
  37 \r
  38     final private Display display;\r
  39     final private org.eclipse.swt.widgets.Combo combo;\r
  40 \r
  41     public Combo(Composite parent, WidgetSupport support, int style) {\r
  42         super(support);\r
  43         this.display = parent.getDisplay();\r
  44         combo = new org.eclipse.swt.widgets.Combo(parent, style);\r
  45         combo.setData("org.simantics.browsing.ui.widgets.Combo", this);\r
  46         support.register(this);\r
  47     }\r
  48 \r
  49     public void setItemFactory(ReadFactory<?, Map<String, Object>> itemFactory) {\r
  50         if (this.itemFactory2 != null)\r
  51             throw new IllegalStateException("Cannot use both itemFactory and itemFactory2");\r
  52         this.itemFactory = itemFactory;\r
  53     }\r
  54 \r
  55     public void setItemFactory2(ReadFactory<?, List<Pair<String, Object>>> itemFactory) {\r
  56         if (this.itemFactory != null)\r
  57             throw new IllegalStateException("Cannot use both itemFactory and itemFactory2");\r
  58         this.itemFactory2 = itemFactory;\r
  59     }\r
  60 \r
  61     public void setSelectionFactory(ReadFactory<?, String> selectionFactory) {\r
  62         this.selectionFactory = selectionFactory;\r
  63     }\r
  64 \r
  65     public org.eclipse.swt.widgets.Combo getWidget() {\r
  66         return combo;\r
  67     }\r
  68 \r
  69     @Override\r
  70     public Control getControl() {\r
  71         return combo;\r
  72     }\r
  73 \r
  74     private AtomicBoolean inputDisposed;\r
  75 \r
  76     @Override\r
  77     public void setInput(ISessionContext context, Object input) {\r
  78 \r
  79         if (this.inputDisposed != null)\r
  80             this.inputDisposed.set(true);\r
  81         final AtomicBoolean inputDisposed = this.inputDisposed = new AtomicBoolean(false);\r
  82 \r
  83         if (modifyListeners != null) {\r
  84             for (ModifyListener listener : modifyListeners) {\r
  85                 if(listener instanceof Widget) {\r
  86                     ((Widget) listener).setInput(context, input);\r
  87                 }\r
  88             }\r
  89         }\r
  90 \r
  91         if(itemFactory != null) {\r
  92             itemFactory.listen(context, input, new Listener<Map<String, Object>>() {\r
  93 \r
  94                 @Override\r
  95                 public void exception(Throwable t) {\r
  96                     t.printStackTrace();\r
  97                 }\r
  98 \r
  99                 @Override\r
 100                 public void execute(final Map<String, Object> items) {\r
 101                     if(isDisposed()) return;\r
 102                     display.asyncExec(new Runnable() {\r
 103 \r
 104                         @Override\r
 105                         public void run() {\r
 106                             if(isDisposed()) return;\r
 107 //                            System.out.println("Combo received new items: " + items.size());\r
 108                             for(ModifyListener listener : modifyListeners) combo.removeModifyListener(listener);\r
 109                             combo.setData(items);\r
 110                             combo.clearSelection();\r
 111                             try {\r
 112                                 combo.removeAll();\r
 113                             } catch (Throwable t) {\r
 114                                 t.printStackTrace();\r
 115                             }\r
 116                             int index = 0;\r
 117                             for(String key : items.keySet()) {\r
 118 //                                System.out.println("-" + key);\r
 119                                 combo.add(key);\r
 120                                 combo.setData(key, index++);\r
 121                             }\r
 122                             String selectionKey = (String)combo.getData("_SelectionKey");\r
 123                             if(selectionKey != null) {\r
 124                                 Integer selectionIndex = (Integer)combo.getData(selectionKey);\r
 125                                 if(selectionIndex != null) combo.select(selectionIndex);\r
 126                             }\r
 127                             for(ModifyListener listener : modifyListeners) combo.addModifyListener(listener);\r
 128                             //label.setSize(200, 20);\r
 129 //                            label.getParent().layout();\r
 130 //                            label.getParent().getParent().layout();\r
 131                         }\r
 132 \r
 133                     });\r
 134                 }\r
 135 \r
 136                 @Override\r
 137                 public boolean isDisposed() {\r
 138                     return combo.isDisposed() || inputDisposed.get();\r
 139                 }\r
 140 \r
 141             });\r
 142         }\r
 143 \r
 144         if(itemFactory2 != null) {\r
 145             itemFactory2.listen(context, input, new Listener<List<Pair<String, Object>>>() {\r
 146 \r
 147                 @Override\r
 148                 public void exception(Throwable t) {\r
 149                     t.printStackTrace();\r
 150                 }\r
 151 \r
 152                 @Override\r
 153                 public void execute(final List<Pair<String, Object>> items) {\r
 154                     if(isDisposed()) return;\r
 155                     display.asyncExec(new Runnable() {\r
 156 \r
 157                         @Override\r
 158                         public void run() {\r
 159                             if(isDisposed()) return;\r
 160 //                            System.out.println("Combo received new items: " + items.size());\r
 161                             itemList = items;\r
 162                             for(ModifyListener listener : modifyListeners) combo.removeModifyListener(listener);\r
 163                             combo.setData(items);\r
 164                             combo.clearSelection();\r
 165                             try {\r
 166                                 combo.removeAll();\r
 167                             } catch (Throwable t) {\r
 168                                 t.printStackTrace();\r
 169                             }\r
 170                             if (items != null) {\r
 171                                 int index = 0;\r
 172                                 for(Pair<String, Object> key : items) {\r
 173 //                                    System.out.println("-" + key);\r
 174                                     combo.add(key.first);\r
 175                                     combo.setData(key.first, index++);\r
 176                                 }\r
 177                                 String selectionKey = (String)combo.getData("_SelectionKey");\r
 178                                 if(selectionKey != null) {\r
 179                                     Integer selectionIndex = (Integer)combo.getData(selectionKey);\r
 180                                     if(selectionIndex != null) combo.select(selectionIndex);\r
 181                                 }\r
 182                             }\r
 183                             for(ModifyListener listener : modifyListeners) combo.addModifyListener(listener);\r
 184                             //label.setSize(200, 20);\r
 185 //                                                      label.getParent().layout();\r
 186 //                                                      label.getParent().getParent().layout();\r
 187                         }\r
 188 \r
 189                     });\r
 190                 }\r
 191 \r
 192                 @Override\r
 193                 public boolean isDisposed() {\r
 194                     return combo.isDisposed() || inputDisposed.get();\r
 195                 }\r
 196 \r
 197             });\r
 198         }\r
 199 \r
 200         if(selectionFactory != null) {\r
 201             selectionFactory.listen(context, input, new Listener<String>() {\r
 202 \r
 203                 @Override\r
 204                 public void exception(Throwable t) {\r
 205                     t.printStackTrace();\r
 206                 }\r
 207 \r
 208                 @Override\r
 209                 public void execute(final String selectionKey) {\r
 210                     if(isDisposed()) return;\r
 211                     display.asyncExec(new Runnable() {\r
 212 \r
 213                         @Override\r
 214                         public void run() {\r
 215                             if(isDisposed()) return;\r
 216                             if(selectionKey == null) return;\r
 217 //                            System.out.println("Combo received new selection key: " + selectionKey);\r
 218                             for(ModifyListener listener : modifyListeners) combo.removeModifyListener(listener);\r
 219                             combo.setData("_SelectionKey", selectionKey);\r
 220                             Integer selectionIndex = (Integer)combo.getData(selectionKey);\r
 221                             if(selectionIndex != null) combo.select(selectionIndex);\r
 222                             for(ModifyListener listener : modifyListeners) combo.addModifyListener(listener);\r
 223                         }\r
 224 \r
 225                     });\r
 226                 }\r
 227 \r
 228                 @Override\r
 229                 public boolean isDisposed() {\r
 230                     return combo.isDisposed() || inputDisposed.get();\r
 231                 }\r
 232 \r
 233             });\r
 234         }\r
 235 \r
 236     }\r
 237 \r
 238     public synchronized void addModifyListener(ModifyListener listener) {\r
 239         modifyListeners.add(listener);\r
 240         combo.addModifyListener(listener);\r
 241     }\r
 242 \r
 243     /**\r
 244      * @param index\r
 245      * @return\r
 246      * @throws IndexOutOfBoundsException if index is outside widget bounds\r
 247      */\r
 248     @SuppressWarnings("unchecked")\r
 249     public <T> Pair<String, T> getData(int index) {\r
 250         if (itemFactory != null)\r
 251             new IllegalStateException("this method is only useful when used with Combo.setItemFactory2").printStackTrace();\r
 252         if (index == -1)\r
 253             return null;\r
 254         return (Pair<String, T>) itemList.get(index);\r
 255     }\r
 256 \r
 257     /**\r
 258      * @return selected combo list item or <code>null</code> if no item is\r
 259      *         selected\r
 260      */\r
 261     public <T> Pair<String, T> getSelectedData() {\r
 262         return getData(combo.getSelectionIndex());\r
 263     }\r
 264 \r
 265 }\r