org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/internal/tmf/ui/project/handlers/DeleteTraceHandler.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009, 2014 Ericsson, École Polytechnique de Montréal
   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  *   Francois Chouinard - Initial API and implementation
  11  *   Patrick Tasse - Close editors to release resources
  12  *   Geneviève Bastien - Moved the delete code to element model's classes
  13  *******************************************************************************/
  14
  15 package org.eclipse.linuxtools.internal.tmf.ui.project.handlers;
  16
  17 import java.util.Iterator;
  18
  19 import org.eclipse.core.commands.AbstractHandler;
  20 import org.eclipse.core.commands.ExecutionEvent;
  21 import org.eclipse.core.commands.ExecutionException;
  22 import org.eclipse.core.runtime.CoreException;
  23 import org.eclipse.jface.viewers.ISelection;
  24 import org.eclipse.jface.viewers.ISelectionProvider;
  25 import org.eclipse.jface.viewers.TreeSelection;
  26 import org.eclipse.linuxtools.internal.tmf.ui.Activator;
  27 import org.eclipse.linuxtools.tmf.ui.project.model.TmfTraceElement;
  28 import org.eclipse.swt.SWT;
  29 import org.eclipse.swt.widgets.Display;
  30 import org.eclipse.swt.widgets.MessageBox;
  31 import org.eclipse.swt.widgets.Shell;
  32 import org.eclipse.ui.IWorkbenchPage;
  33 import org.eclipse.ui.IWorkbenchPart;
  34 import org.eclipse.ui.IWorkbenchWindow;
  35 import org.eclipse.ui.PlatformUI;
  36
  37 /**
  38  * <b><u>DeleteTraceHandler</u></b>
  39  * <p>
  40  */
  41 public class DeleteTraceHandler extends AbstractHandler {
  42
  43     private TreeSelection fSelection = null;
  44
  45     // ------------------------------------------------------------------------
  46     // Validation
  47     // ------------------------------------------------------------------------
  48
  49     @Override
  50     public boolean isEnabled() {
  51
  52         // Check if we are closing down
  53         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  54         if (window == null) {
  55             return false;
  56         }
  57
  58         // Get the selection
  59         IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
  60         IWorkbenchPart part = page.getActivePart();
  61         if (part == null) {
  62             return false;
  63         }
  64         ISelectionProvider selectionProvider = part.getSite().getSelectionProvider();
  65         if (selectionProvider == null) {
  66             return false;
  67         }
  68         ISelection selection = selectionProvider.getSelection();
  69
  70         // Make sure selection contains only traces
  71         fSelection = null;
  72         if (selection instanceof TreeSelection) {
  73             fSelection = (TreeSelection) selection;
  74             Iterator<Object> iterator = fSelection.iterator();
  75             while (iterator.hasNext()) {
  76                 Object element = iterator.next();
  77                 if (!(element instanceof TmfTraceElement)) {
  78                     return false;
  79                 }
  80             }
  81         }
  82
  83         // If we get here, either nothing is selected or everything is a trace
  84         return !selection.isEmpty();
  85     }
  86
  87     // ------------------------------------------------------------------------
  88     // Execution
  89     // ------------------------------------------------------------------------
  90
  91     @Override
  92     public Object execute(ExecutionEvent event) throws ExecutionException {
  93
  94         // Check if we are closing down
  95         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  96         if (window == null) {
  97             return null;
  98         }
  99
 100         // Confirm the operation
 101         Shell shell = window.getShell();
 102         MessageBox confirmOperation = new MessageBox(shell, SWT.ICON_QUESTION | SWT.CANCEL | SWT.OK);
 103         confirmOperation.setText(Messages.DeleteDialog_Title);
 104         confirmOperation.setMessage(Messages.DeleteTraceHandler_Message);
 105         if (confirmOperation.open() != SWT.OK) {
 106             return null;
 107         }
 108
 109         Iterator<Object> iterator = fSelection.iterator();
 110         while (iterator.hasNext()) {
 111             Object element = iterator.next();
 112             if (element instanceof TmfTraceElement) {
 113                 final TmfTraceElement trace = (TmfTraceElement) element;
 114                 try {
 115                     trace.delete(null);
 116                 } catch (final CoreException e) {
 117                     Display.getDefault().asyncExec(new Runnable() {
 118                         @Override
 119                         public void run() {
 120                             final MessageBox mb = new MessageBox(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell());
 121                             mb.setText(Messages.DeleteTraceHandler_Error + ' ' + trace.getName());
 122                             mb.setMessage(e.getMessage());
 123                             mb.open();
 124                         }
 125                     });
 126                     Activator.getDefault().logError("Error deleting trace: " + trace.getName(), e); //$NON-NLS-1$
 127                 }
 128             }
 129         }
 130
 131         return null;
 132     }
 133 }