org.eclipse.tracecompass.tmf.ui/src/org/eclipse/tracecompass/internal/tmf/ui/project/handlers/OpenExperimentHandler.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  *   Geneviève Bastien - Experiment instantiates with an experiment type
  12  *******************************************************************************/
  13
  14 package org.eclipse.tracecompass.internal.tmf.ui.project.handlers;
  15
  16 import org.eclipse.core.commands.AbstractHandler;
  17 import org.eclipse.core.commands.ExecutionEvent;
  18 import org.eclipse.core.commands.ExecutionException;
  19 import org.eclipse.jface.viewers.ISelection;
  20 import org.eclipse.jface.viewers.ISelectionProvider;
  21 import org.eclipse.jface.viewers.TreeSelection;
  22 import org.eclipse.tracecompass.tmf.ui.project.model.TmfExperimentElement;
  23 import org.eclipse.tracecompass.tmf.ui.project.model.TmfOpenTraceHelper;
  24 import org.eclipse.ui.IWorkbenchPage;
  25 import org.eclipse.ui.IWorkbenchPart;
  26 import org.eclipse.ui.IWorkbenchWindow;
  27 import org.eclipse.ui.PlatformUI;
  28
  29 /**
  30  * <b><u>OpenExperimentHandler</u></b>
  31  * <p>
  32  */
  33 public class OpenExperimentHandler extends AbstractHandler {
  34
  35     private TmfExperimentElement fExperiment = null;
  36
  37     // ------------------------------------------------------------------------
  38     // Validation
  39     // ------------------------------------------------------------------------
  40
  41     @Override
  42     public boolean isEnabled() {
  43
  44         // Check if we are closing down
  45         final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  46         if (window == null) {
  47             return false;
  48         }
  49
  50         // Get the selection
  51         final IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
  52         final IWorkbenchPart part = page.getActivePart();
  53         if (part == null) {
  54             return false;
  55         }
  56         final ISelectionProvider selectionProvider = part.getSite().getSelectionProvider();
  57         if (selectionProvider == null) {
  58             return false;
  59         }
  60         final ISelection selection = selectionProvider.getSelection();
  61
  62         // Make sure there is only one selection and that it is an experiment
  63         fExperiment = null;
  64         if (selection instanceof TreeSelection) {
  65             final TreeSelection sel = (TreeSelection) selection;
  66             // There should be only one item selected as per the plugin.xml
  67             final Object element = sel.getFirstElement();
  68             if (element instanceof TmfExperimentElement) {
  69                 fExperiment = (TmfExperimentElement) element;
  70             }
  71         }
  72
  73         // We only enable opening from the Traces folder for now
  74         return ((fExperiment != null) && (fExperiment.getTraces().size() > 0));
  75     }
  76
  77     // ------------------------------------------------------------------------
  78     // Execution
  79     // ------------------------------------------------------------------------
  80
  81     @Override
  82     public Object execute(final ExecutionEvent event) throws ExecutionException {
  83
  84         // Check if we are closing down
  85         final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  86         if (window == null) {
  87             return null;
  88         }
  89
  90         // Check that the experiment is valid
  91         if (fExperiment == null) {
  92             return null;
  93         }
  94
  95         TmfOpenTraceHelper.openTraceFromElement(fExperiment);
  96         return null;
  97     }
  98
  99 }