eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/descriptiveDataSet/handler/DescriptiveDataSetRemoveTaxonHandler.java

   1
   2 package eu.etaxonomy.taxeditor.editor.descriptiveDataSet.handler;
   3
   4 import java.util.Collection;
   5
   6 import javax.inject.Named;
   7
   8 import org.eclipse.e4.core.di.annotations.CanExecute;
   9 import org.eclipse.e4.core.di.annotations.Execute;
  10 import org.eclipse.e4.ui.model.application.ui.basic.MPart;
  11 import org.eclipse.e4.ui.model.application.ui.menu.MMenuItem;
  12 import org.eclipse.e4.ui.services.IServiceConstants;
  13 import org.eclipse.jface.viewers.IStructuredSelection;
  14 import org.eclipse.jface.viewers.TreeSelection;
  15 import org.eclipse.jface.viewers.TreeViewer;
  16
  17 import eu.etaxonomy.cdm.persistence.dto.TaxonNodeDto;
  18 import eu.etaxonomy.taxeditor.editor.descriptiveDataSet.DescriptiveDataSetEditor;
  19
  20 public class DescriptiveDataSetRemoveTaxonHandler {
  21         @Execute
  22         public void execute(@Named(IServiceConstants.ACTIVE_PART)MPart activePart) {
  23             DescriptiveDataSetEditor editor = (DescriptiveDataSetEditor) activePart.getObject();
  24             editor.removeSelectedTaxonNodes();
  25         }
  26
  27
  28         @CanExecute
  29         public boolean canExecute(@Named(IServiceConstants.ACTIVE_SELECTION)IStructuredSelection selection,
  30                 @Named(IServiceConstants.ACTIVE_PART)MPart activePart,
  31                 MMenuItem menuItem) {
  32             boolean canExecute = false;
  33             TreeSelection sel= ((TreeViewer)((DescriptiveDataSetEditor)activePart.getObject()).getTaxonTreeViewer()).getSelection() instanceof TreeSelection ?(TreeSelection)((TreeViewer)((DescriptiveDataSetEditor)activePart.getObject()).getTaxonTreeViewer()).getSelection(): null;
  34             canExecute = !selection.isEmpty() && activePart.getObject() instanceof DescriptiveDataSetEditor && sel != null && sel.getFirstElement() instanceof TaxonNodeDto ;
  35             TreeViewer viewer = ((TreeViewer)((DescriptiveDataSetEditor)activePart.getObject()).getTaxonTreeViewer());
  36             Collection<TaxonNodeDto> input = (Collection<TaxonNodeDto>)viewer.getInput();
  37
  38             canExecute &= input.contains(sel.getFirstElement());
  39
  40             menuItem.setVisible(canExecute);
  41                 return canExecute;
  42         }
  43
  44 }