taxeditor-navigation/src/main/java/eu/etaxonomy/taxeditor/navigation/NavigatorStateManager.java

   1
   2 package eu.etaxonomy.taxeditor.navigation;
   3
   4 import org.eclipse.core.runtime.IProgressMonitor;
   5 import org.eclipse.ui.IMemento;
   6
   7 import eu.etaxonomy.taxeditor.model.ContextListenerAdapter;
   8 import eu.etaxonomy.taxeditor.navigation.navigator.TaxonNavigator;
   9
  10 /**
  11  * <p>NavigatorStateManager class.</p>
  12  *
  13  * @author n.hoffmann
  14  * @created Apr 1, 2010
  15  * @version 1.0
  16  */
  17 public class NavigatorStateManager extends ContextListenerAdapter {
  18
  19         /**
  20          * {@inheritDoc}
  21          *
  22          * Tries to restore the state of the taxon editor and the navigator when a context starts.
  23          */
  24         @Override
  25         public void contextStart(IMemento memento, IProgressMonitor monitor) {
  26                 TaxonNavigator navigator = NavigationUtil.getNavigator(true);
  27                 if(navigator != null){
  28                         navigator.init();
  29                         navigator.restore(memento, monitor);
  30                 }
  31         }
  32
  33         /**
  34          * {@inheritDoc}
  35          *
  36          * If the context
  37          */
  38         @Override
  39         public void contextStop(IMemento memento, IProgressMonitor monitor) {
  40                 saveNavigatorState(memento, monitor);
  41                 clearNavigator();
  42         }
  43
  44         /* (non-Javadoc)
  45          * @see eu.etaxonomy.taxeditor.model.ContextListenerAdapter#workbenchShutdown(org.eclipse.ui.IMemento, org.eclipse.core.runtime.IProgressMonitor)
  46          */
  47         /** {@inheritDoc} */
  48         @Override
  49         public void workbenchShutdown(IMemento memento, IProgressMonitor monitor) {
  50                 saveNavigatorState(memento, monitor);
  51         }
  52
  53         /**
  54          * @param memento
  55          */
  56         private void saveNavigatorState(IMemento memento, IProgressMonitor monitor) {
  57                 TaxonNavigator navigator = NavigationUtil.getNavigator(false);
  58                 if(navigator != null){
  59                         navigator.save(memento, monitor);
  60                 }
  61         }
  62
  63         /**
  64          * Removes all content form the TaxonNavigator
  65          */
  66         private void clearNavigator() {
  67                 TaxonNavigator navigator = NavigationUtil.getNavigator(false);
  68                 if(navigator != null){
  69                         navigator.clear();
  70                 }
  71         }
  72
  73 }