bundles/org.simantics.document.linking.ui/src/org/simantics/document/linking/ge/MultiSelectionProvider.java

   1 package org.simantics.document.linking.ge;\r
   2 \r
   3 import java.util.ArrayList;\r
   4 import java.util.List;\r
   5 \r
   6 import org.eclipse.jface.viewers.ISelection;\r
   7 import org.eclipse.jface.viewers.ISelectionChangedListener;\r
   8 import org.eclipse.jface.viewers.ISelectionProvider;\r
   9 import org.eclipse.jface.viewers.SelectionChangedEvent;\r
  10 \r
  11 /**\r
  12  * Selection Provider for providing slections from multiple GraphExplorers attached to the same site\r
  13  * .\r
  14  * @author Marko Luukkainen <marko.luukkainen@vtt.fi>\r
  15  *\r
  16  */\r
  17 public class MultiSelectionProvider implements ISelectionProvider, ISelectionChangedListener {\r
  18         \r
  19         private List<ISelectionProvider> selectionProviders = new ArrayList<ISelectionProvider>();\r
  20         private List<ISelectionChangedListener> listeners = new ArrayList<ISelectionChangedListener>();\r
  21         private ISelection selection;\r
  22         \r
  23         @Override\r
  24         public void addSelectionChangedListener(ISelectionChangedListener listener) {\r
  25                 listeners.add(listener);\r
  26                 \r
  27         }\r
  28         @Override\r
  29         public void removeSelectionChangedListener(\r
  30                         ISelectionChangedListener listener) {\r
  31                 listeners.remove(listener);\r
  32                 \r
  33         }\r
  34         \r
  35         @Override\r
  36         public ISelection getSelection() {\r
  37                 return selection;\r
  38         }\r
  39         \r
  40         @Override\r
  41         public void setSelection(ISelection selection) {\r
  42                 this.selection = selection;\r
  43                 // TODO : should we pass the selection to selectionProviders? \r
  44         }\r
  45         \r
  46         @Override\r
  47         public void selectionChanged(SelectionChangedEvent event) {\r
  48                 this.selection = event.getSelection();\r
  49                 SelectionChangedEvent fireEvent = new SelectionChangedEvent(this, selection);\r
  50                 for (ISelectionChangedListener l : listeners) {\r
  51                         l.selectionChanged(fireEvent);\r
  52                 }\r
  53                 \r
  54         }\r
  55         \r
  56         public void addSelectionProvider(ISelectionProvider provider) {\r
  57                 selectionProviders.add(provider);\r
  58                 provider.addSelectionChangedListener(this);\r
  59         }\r
  60         \r
  61         public void removeSelectionProvider(ISelectionProvider provider) {\r
  62                 selectionProviders.remove(provider);\r
  63                 provider.removeSelectionChangedListener(this);\r
  64         }\r
  65 \r
  66 }\r