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1 | /********************************************************************** |
2 | * Copyright (c) 2012 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 | * Bernd Hufmann - Initial API and implementation | |
11 | **********************************************************************/ | |
12 | package org.eclipse.linuxtools.lttng.ui.views.control.handlers; | |
13 | ||
4775bcbf | 14 | import org.eclipse.core.commands.AbstractHandler; |
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15 | import org.eclipse.jface.viewers.ISelection; |
16 | import org.eclipse.jface.viewers.StructuredSelection; | |
17 | import org.eclipse.linuxtools.lttng.ui.views.control.ControlView; | |
18 | import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TargetNodeComponent; | |
19 | import org.eclipse.ui.IWorkbenchPage; | |
20 | import org.eclipse.ui.IWorkbenchPart; | |
21 | import org.eclipse.ui.IWorkbenchWindow; | |
22 | import org.eclipse.ui.PlatformUI; | |
23 | ||
24 | /** | |
25 | * <b><u>BaseNodeHandler</u></b> | |
26 | * <p> | |
27 | * Command handler implementation to delete a target host. | |
28 | * </p> | |
29 | */ | |
4775bcbf | 30 | abstract public class BaseNodeHandler extends AbstractHandler { |
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31 | |
32 | // ------------------------------------------------------------------------ | |
33 | // Attributes | |
34 | // ------------------------------------------------------------------------ | |
35 | /** | |
36 | * The target node component the command is to be executed on. | |
37 | */ | |
38 | protected TargetNodeComponent fTargetNode = null; | |
39 | ||
40 | // ------------------------------------------------------------------------ | |
41 | // Constructors | |
42 | // ------------------------------------------------------------------------ | |
43 | ||
44 | // ------------------------------------------------------------------------ | |
45 | // Accessors | |
46 | // ------------------------------------------------------------------------ | |
47 | public TargetNodeComponent getTargetNode() { | |
48 | return fTargetNode; | |
49 | } | |
50 | ||
51 | // ------------------------------------------------------------------------ | |
52 | // Operations | |
53 | // ------------------------------------------------------------------------ | |
54 | /* | |
55 | * (non-Javadoc) | |
4775bcbf | 56 | * @see org.eclipse.core.commands.AbstractHandler#isEnabled() |
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57 | */ |
58 | @Override | |
59 | public boolean isEnabled() { | |
60 | fTargetNode = null; | |
61 | ||
62 | // Check if we are closing down | |
63 | IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow(); | |
64 | if (window == null) { | |
65 | return false; | |
66 | } | |
67 | ||
68 | // Check if we are in the Project View | |
69 | IWorkbenchPage page = window.getActivePage(); | |
70 | if (page == null) { | |
71 | return false; | |
72 | } | |
73 | ||
74 | IWorkbenchPart part = page.getActivePart(); | |
75 | if (!(part instanceof ControlView)) { | |
76 | return false; | |
77 | } | |
78 | ||
79 | // Check if a project is selected | |
80 | ISelection selection = page.getSelection(ControlView.ID); | |
81 | if (selection instanceof StructuredSelection) { | |
82 | Object element = ((StructuredSelection) selection).getFirstElement(); | |
83 | fTargetNode = (element instanceof TargetNodeComponent) ? (TargetNodeComponent) element : null; | |
84 | } | |
85 | return fTargetNode != null; | |
86 | } | |
eb1bab5b | 87 | } |