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

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