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

   1 /*******************************************************************************
   2  * Copyright (c) 2009, 2013 Ericsson
   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  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.internal.tmf.ui.project.handlers;
  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.ISelectionProvider;
  20 import org.eclipse.jface.viewers.TreeSelection;
  21 import org.eclipse.linuxtools.tmf.ui.project.model.TmfExperimentElement;
  22 import org.eclipse.linuxtools.tmf.ui.project.model.TmfOpenTraceHelper;
  23 import org.eclipse.ui.IWorkbenchPage;
  24 import org.eclipse.ui.IWorkbenchPart;
  25 import org.eclipse.ui.IWorkbenchWindow;
  26 import org.eclipse.ui.PlatformUI;
  27
  28 /**
  29  * <b><u>OpenExperimentHandler</u></b>
  30  * <p>
  31  */
  32 public class OpenExperimentHandler extends AbstractHandler {
  33
  34     private TmfExperimentElement fExperiment = null;
  35
  36     // ------------------------------------------------------------------------
  37     // Validation
  38     // ------------------------------------------------------------------------
  39
  40     @Override
  41     public boolean isEnabled() {
  42
  43         // Check if we are closing down
  44         final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  45         if (window == null) {
  46             return false;
  47         }
  48
  49         // Get the selection
  50         final IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
  51         final IWorkbenchPart part = page.getActivePart();
  52         if (part == null) {
  53             return false;
  54         }
  55         final ISelectionProvider selectionProvider = part.getSite().getSelectionProvider();
  56         if (selectionProvider == null) {
  57             return false;
  58         }
  59         final ISelection selection = selectionProvider.getSelection();
  60
  61         // Make sure there is only one selection and that it is an experiment
  62         fExperiment = null;
  63         if (selection instanceof TreeSelection) {
  64             final TreeSelection sel = (TreeSelection) selection;
  65             // There should be only one item selected as per the plugin.xml
  66             final Object element = sel.getFirstElement();
  67             if (element instanceof TmfExperimentElement) {
  68                 fExperiment = (TmfExperimentElement) element;
  69             }
  70         }
  71
  72         // We only enable opening from the Traces folder for now
  73         return ((fExperiment != null) && (fExperiment.getTraces().size() > 0));
  74     }
  75
  76     // ------------------------------------------------------------------------
  77     // Execution
  78     // ------------------------------------------------------------------------
  79
  80     @Override
  81     public Object execute(final ExecutionEvent event) throws ExecutionException {
  82
  83         // Check if we are closing down
  84         final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  85         if (window == null) {
  86             return null;
  87         }
  88
  89         // Check that the experiment is valid
  90         if (fExperiment == null) {
  91             return null;
  92         }
  93
  94         TmfOpenTraceHelper.openExperimentFromElement(fExperiment);
  95         return null;
  96     }
  97
  98 }