org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/filter/DeleteHandler.java

   1 /*******************************************************************************
   2  * Copyright (c) 2013 Kalray
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Xavier Raynaud - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.tmf.ui.views.filter;
  14
  15 import org.eclipse.core.commands.AbstractHandler;
  16 import org.eclipse.core.commands.ExecutionEvent;
  17 import org.eclipse.core.commands.ExecutionException;
  18 import org.eclipse.jface.viewers.ISelection;
  19 import org.eclipse.jface.viewers.IStructuredSelection;
  20 import org.eclipse.linuxtools.tmf.core.filter.model.ITmfFilterTreeNode;
  21 import org.eclipse.ui.IWorkbenchPage;
  22 import org.eclipse.ui.IWorkbenchPart;
  23 import org.eclipse.ui.IWorkbenchWindow;
  24 import org.eclipse.ui.PlatformUI;
  25
  26 /**
  27  * Handler for delete command in filter view
  28  * @author Xavier Raynaud <xavier.raynaud@kalray.eu>
  29  * @since 2.2
  30  */
  31 public class DeleteHandler extends AbstractHandler {
  32
  33     @Override
  34     public Object execute(ExecutionEvent event) throws ExecutionException {
  35         // Check if we are closing down
  36         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  37         if (window == null) {
  38             return null;
  39         }
  40         IWorkbenchPage page = window.getActivePage();
  41         FilterView part = (FilterView) page.getActivePart();
  42         ISelection sel = part.getViewSite().getSelectionProvider().getSelection();
  43         if (sel instanceof IStructuredSelection) {
  44             IStructuredSelection selection = (IStructuredSelection) sel;
  45             Object o = selection.getFirstElement();
  46             if (o instanceof ITmfFilterTreeNode) {
  47                 ITmfFilterTreeNode node = (ITmfFilterTreeNode) o;
  48                 node = node.remove();
  49                 part.refresh();
  50             }
  51         }
  52         return null;
  53     }
  54
  55     @Override
  56     public boolean isEnabled() {
  57         // Check if we are closing down
  58         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  59         if (window == null) {
  60             return false;
  61         }
  62
  63         // Get the selection
  64         IWorkbenchPage page = window.getActivePage();
  65         IWorkbenchPart part = page.getActivePart();
  66         if (part instanceof FilterView) {
  67             FilterView tcv = (FilterView) part;
  68             ISelection selection = tcv.getSite().getSelectionProvider().getSelection();
  69             if (!selection.isEmpty()) {
  70                 return true;
  71             }
  72         }
  73         return false;
  74     }
  75 }