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Java > Open Source Codes > org > eclipse > ui > internal > navigator > filters > ToggleFilterAction


1 /*******************************************************************************
2  * Copyright (c) 2006 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  ******************************************************************************/

11
12 package org.eclipse.ui.internal.navigator.filters;
13
14 import org.eclipse.core.runtime.Assert;
15 import org.eclipse.jface.action.Action;
16 import org.eclipse.jface.action.IAction;
17 import org.eclipse.jface.viewers.StructuredSelection;
18 import org.eclipse.jface.viewers.ViewerFilter;
19 import org.eclipse.ui.internal.navigator.NavigatorFilterService;
20 import org.eclipse.ui.navigator.CommonViewer;
21 import org.eclipse.ui.navigator.ICommonFilterDescriptor;
22
23 /**
24  * @since 3.2
25  *
26  */

27 public class ToggleFilterAction extends Action implements IAction {
28
29     private ICommonFilterDescriptor descriptor;
30
31     private NavigatorFilterService filterService;
32
33     private CommonViewer commonViewer;
34
35     protected ToggleFilterAction(CommonViewer aCommonViewer,
36             NavigatorFilterService aFilterService,
37             ICommonFilterDescriptor aFilterDescriptor) {
38         Assert.isNotNull(aCommonViewer);
39         Assert.isNotNull(aFilterService);
40         Assert.isNotNull(aFilterDescriptor);
41
42         commonViewer = aCommonViewer;
43         filterService = aFilterService;
44         descriptor = aFilterDescriptor;
45
46         setChecked(filterService.isActive(descriptor.getId()));
47         setText(descriptor.getName());
48     }
49
50     /*
51      * (non-Javadoc)
52      *
53      * @see org.eclipse.jface.action.Action#run()
54      */

55     public void run() {
56
57         boolean toMakeActive = !isChecked();
58
59         filterService.setActive(descriptor.getId(), toMakeActive);
60         filterService.persistFilterActivationState();
61
62         ViewerFilter viewerFilter = filterService.getViewerFilter(descriptor);
63         if (toMakeActive) {
64             commonViewer.addFilter(viewerFilter);
65         } else {
66             commonViewer.removeFilter(viewerFilter);
67         }
68
69         // the action providers may no longer be enabled, so we
70
// reset the selection.
71
commonViewer.setSelection(StructuredSelection.EMPTY);
72
73         setChecked(toMakeActive);
74
75     }
76 }
77
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