eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/key/polytomous/handler/DeleteNodeHandler.java

   1 /**
   2  * Copyright (C) 2007 EDIT
   3  * European Distributed Institute of Taxonomy
   4  * http://www.e-taxonomy.eu
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version 1.1
   7  * See LICENSE.TXT at the top of this package for the full license terms.
   8  */
   9
  10 package eu.etaxonomy.taxeditor.editor.key.polytomous.handler;
  11
  12 import org.eclipse.core.commands.ExecutionEvent;
  13 import org.eclipse.core.commands.ExecutionException;
  14 import org.eclipse.core.commands.common.NotDefinedException;
  15 import org.eclipse.core.commands.operations.AbstractOperation;
  16 import org.eclipse.core.commands.operations.IUndoContext;
  17 import org.eclipse.core.runtime.IStatus;
  18 import org.eclipse.core.runtime.Status;
  19 import org.eclipse.jface.dialogs.MessageDialog;
  20 import org.eclipse.jface.viewers.IStructuredSelection;
  21 import org.eclipse.ui.IEditorPart;
  22 import org.eclipse.ui.handlers.HandlerUtil;
  23
  24 import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
  25 import eu.etaxonomy.cdm.model.description.PolytomousKeyNode;
  26 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  27 import eu.etaxonomy.taxeditor.editor.key.KeyEditor;
  28 import eu.etaxonomy.taxeditor.editor.key.polytomous.IPolytomousKeyEditorPage;
  29 import eu.etaxonomy.taxeditor.editor.key.polytomous.PolytomousKeyEditorLabels;
  30 import eu.etaxonomy.taxeditor.editor.key.polytomous.PolytomousKeyListEditor;
  31 import eu.etaxonomy.taxeditor.editor.key.polytomous.operation.DeleteNodeOperation;
  32 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  33 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  34
  35 /**
  36  * @author n.hoffmann
  37  * @created Dec 6, 2010
  38  * @version 1.0
  39  */
  40 public class DeleteNodeHandler extends AbstractPolytomousKeyNodeHandler {
  41
  42
  43     PolytomousKeyNode nodeToBeDeleted;
  44     /**
  45      * @param label
  46      */
  47     public DeleteNodeHandler(String label) {
  48         super(label);
  49
  50     }
  51
  52
  53
  54     public DeleteNodeHandler() {
  55         super(PolytomousKeyEditorLabels.DELETE_NODE_POLYTOMOUS_KEY_NODE_LABEL);
  56     }
  57
  58         /*
  59          * (non-Javadoc)
  60          *
  61          * @see
  62          * org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.
  63          * ExecutionEvent)
  64          */
  65         @Override
  66         public Object execute(ExecutionEvent event) throws ExecutionException {
  67                 IEditorPart editor = HandlerUtil.getActiveEditor(event);
  68
  69                 if (editor.isDirty()){
  70                         boolean proceed = MessageDialog.openQuestion(null,
  71                                         "Save changes", "You have made changes that must be saved before you can delete the node. Would you like to proceed?");
  72                         if (!proceed) {
  73                                 return null;
  74                         }else{
  75                                 editor.doSave(EditorUtil.getMonitor());
  76                         }
  77                 }
  78                 if (editor instanceof KeyEditor) {
  79                         IPolytomousKeyEditorPage editorPage = (IPolytomousKeyEditorPage) ((KeyEditor) editor)
  80                                         .getActiveEditor();
  81
  82                         IStructuredSelection selection = (IStructuredSelection) HandlerUtil
  83                                         .getCurrentSelection(event);
  84
  85                         if (selection.getFirstElement() instanceof PolytomousKeyNode) {
  86                                 try {
  87                                         String label = event.getCommand().getName();
  88                                         IUndoContext undoContext = EditorUtil.getUndoContext();
  89
  90                                         for (Object element : selection.toArray()) {
  91                                                 PolytomousKeyNode keyNode = HibernateProxyHelper.deproxy(element, PolytomousKeyNode.class);
  92
  93                                                 AbstractPostOperation operation = new DeleteNodeOperation(
  94                                                                 label, undoContext, keyNode, editorPage);
  95                                                 EditorUtil.executeOperation(operation);
  96                                         }
  97
  98                                 } catch (NotDefinedException e) {
  99                                         MessagingUtils.warn(getClass(), "Command name not set.");
 100                                 }
 101                         } else {
 102                         MessageDialog.openInformation(
 103                                 EditorUtil.getShell(),
 104                                 "No Key Node Selected",
 105                                 "Please right-click on a specific key node to delete a key node.");
 106                         }
 107                 }
 108
 109                 return null;
 110         }
 111
 112     /**
 113      * {@inheritDoc}
 114      */
 115     @Override
 116     public IStatus allowOperations(ExecutionEvent event) {
 117         IEditorPart editor = HandlerUtil.getActiveEditor(event);
 118
 119         if (editor instanceof KeyEditor) {
 120             editorPage = (IPolytomousKeyEditorPage) ((KeyEditor) editor)
 121                     .getActiveEditor();
 122
 123             if (editorPage instanceof PolytomousKeyListEditor) {
 124                 PolytomousKeyListEditor klEditor = (PolytomousKeyListEditor) editorPage;
 125                 IStructuredSelection selection = (IStructuredSelection) HandlerUtil.getCurrentSelection(event);
 126                     if (selection.getFirstElement() instanceof PolytomousKeyNode) {
 127                         nodeToBeDeleted = (PolytomousKeyNode) selection.getFirstElement();
 128                     } else {
 129                         return new Status(IStatus.ERROR,
 130                                 "unknown",
 131                                 PolytomousKeyEditorLabels.NO_KEY_NODE_FOR_CHILD_SELECTED_MESSAGE);
 132                     }
 133                 }
 134
 135         }
 136         return Status.OK_STATUS;
 137     }
 138
 139     /**
 140      * {@inheritDoc}
 141      */
 142     @Override
 143     public AbstractOperation prepareOperation(ExecutionEvent event) {
 144         IUndoContext undoContext = EditorUtil.getUndoContext();
 145         String label = "";
 146         try {
 147             label = event.getCommand().getName();
 148         } catch (NotDefinedException e) {
 149             MessagingUtils.warn(getClass(), "Command name not set.");
 150         }
 151         return new DeleteNodeOperation(label, undoContext, nodeToBeDeleted, editorPage);
 152     }
 153
 154     /**
 155      * {@inheritDoc}
 156      */
 157     @Override
 158     public void onComplete() {
 159         // TODO Auto-generated method stub
 160
 161     }
 162
 163 }