Mercurial > projects > dwt2

comparison org.eclipse.jface/src/org/eclipse/jface/viewers/ViewerFilter.d @ 12:bc29606a740c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
parents
children
comparison
equal deleted inserted replaced
11:43904fec5dca 12:bc29606a740c
1 /*******************************************************************************
2 * Copyright (c) 2000, 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 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module org.eclipse.jface.viewers.ViewerFilter;
14
15 import org.eclipse.jface.viewers.Viewer;
16 import org.eclipse.jface.viewers.TreePath;
17
18
19 import java.lang.all;
20 import java.util.ArrayList;
21 import java.util.Set;
22
23 /**
24 * A viewer filter is used by a structured viewer to
25 * extract a subset of elements provided by its content provider.
26 * <p>
27 * Subclasses must implement the <code>select</code> method
28 * and may implement the <code>isFilterProperty</code> method.
29 * </p>
30 * @see IStructuredContentProvider
31 * @see StructuredViewer
32 */
33 public abstract class ViewerFilter {
34 /**
35 * Creates a new viewer filter.
36 */
37 protected this() {
38 }
39
40 /**
41 * Filters the given elements for the given viewer.
42 * The input array is not modified.
43 * <p>
44 * The default implementation of this method calls
45 * <code>select</code> on each element in the array,
46 * and returns only those elements for which <code>select</code>
47 * returns <code>true</code>.
48 * </p>
49 * @param viewer the viewer
50 * @param parent the parent element
51 * @param elements the elements to filter
52 * @return the filtered elements
53 */
54 public Object[] filter(Viewer viewer, Object parent, Object[] elements) {
55 int size = elements.length;
56 ArrayList out_ = new ArrayList(size);
57 for (int i = 0; i < size; ++i) {
58 Object element = elements[i];
59 if (select(viewer, parent, element)) {
60 out_.add(element);
61 }
62 }
63 return out_.toArray();
64 }
65
66 /**
67 * Filters the given elements for the given viewer.
68 * The input array is not modified.
69 * <p>
70 * The default implementation of this method calls
71 * {@link #filter(Viewer, Object, Object[])} with the
72 * parent from the path. Subclasses may override
73 * </p>
74 * @param viewer the viewer
75 * @param parentPath the path of the parent element
76 * @param elements the elements to filter
77 * @return the filtered elements
78 * @since 3.2
79 */
80 public Object[] filter(Viewer viewer, TreePath parentPath, Object[] elements) {
81 return filter(viewer, parentPath.getLastSegment(), elements);
82 }
83
84 /**
85 * Returns whether this viewer filter would be affected
86 * by a change to the given property of the given element.
87 * <p>
88 * The default implementation of this method returns <code>false</code>.
89 * Subclasses should reimplement.
90 * </p>
91 *
92 * @param element the element
93 * @param property the property
94 * @return <code>true</code> if the filtering would be affected,
95 * and <code>false</code> if it would be unaffected
96 */
97 public bool isFilterProperty(Object element, String property) {
98 return false;
99 }
100
101 /**
102 * Returns whether the given element makes it through this filter.
103 *
104 * @param viewer the viewer
105 * @param parentElement the parent element
106 * @param element the element
107 * @return <code>true</code> if element is included in the
108 * filtered set, and <code>false</code> if excluded
109 */
110 public abstract bool select(Viewer viewer, Object parentElement,
111 Object element);
112 }