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/*
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* Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javax.swing.event;
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import java.util.EventObject;
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import javax.swing.tree.TreePath;
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/**
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* An event that characterizes a change in the current
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* selection. The change is based on any number of paths.
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* TreeSelectionListeners will generally query the source of
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* the event for the new selected status of each potentially
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* changed row.
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* <p>
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* <strong>Warning:</strong>
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* Serialized objects of this class will not be compatible with
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* future Swing releases. The current serialization support is
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* appropriate for short term storage or RMI between applications running
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* the same version of Swing. As of 1.4, support for long term storage
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* of all JavaBeans™
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* has been added to the <code>java.beans</code> package.
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* Please see {@link java.beans.XMLEncoder}.
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*
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* @see TreeSelectionListener
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* @see javax.swing.tree.TreeSelectionModel
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*
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* @author Scott Violet
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*/
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@SuppressWarnings("serial") // Same-version serialization only
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public class TreeSelectionEvent extends EventObject
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{
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/** Paths this event represents. */
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protected TreePath[] paths;
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/** For each path identifies if that path is in fact new. */
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protected boolean[] areNew;
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/** leadSelectionPath before the paths changed, may be null. */
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protected TreePath oldLeadSelectionPath;
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/** leadSelectionPath after the paths changed, may be null. */
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protected TreePath newLeadSelectionPath;
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/**
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* Represents a change in the selection of a TreeSelectionModel.
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* paths identifies the paths that have been either added or
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* removed from the selection.
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*
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* @param source source of event
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* @param paths the paths that have changed in the selection
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*/
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public TreeSelectionEvent(Object source, TreePath[] paths,
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boolean[] areNew, TreePath oldLeadSelectionPath,
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TreePath newLeadSelectionPath)
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{
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super(source);
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this.paths = paths;
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this.areNew = areNew;
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this.oldLeadSelectionPath = oldLeadSelectionPath;
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this.newLeadSelectionPath = newLeadSelectionPath;
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}
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/**
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* Represents a change in the selection of a TreeSelectionModel.
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* path identifies the path that have been either added or
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* removed from the selection.
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*
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* @param source source of event
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* @param path the path that has changed in the selection
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* @param isNew whether or not the path is new to the selection, false
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* means path was removed from the selection.
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*/
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public TreeSelectionEvent(Object source, TreePath path, boolean isNew,
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TreePath oldLeadSelectionPath,
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TreePath newLeadSelectionPath)
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{
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super(source);
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paths = new TreePath[1];
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paths[0] = path;
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areNew = new boolean[1];
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areNew[0] = isNew;
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this.oldLeadSelectionPath = oldLeadSelectionPath;
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this.newLeadSelectionPath = newLeadSelectionPath;
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}
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/**
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* Returns the paths that have been added or removed from the
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* selection.
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*/
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public TreePath[] getPaths()
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{
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int numPaths;
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TreePath[] retPaths;
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numPaths = paths.length;
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retPaths = new TreePath[numPaths];
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System.arraycopy(paths, 0, retPaths, 0, numPaths);
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return retPaths;
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}
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/**
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* Returns the first path element.
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*/
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public TreePath getPath()
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{
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return paths[0];
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}
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/**
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* Returns whether the path identified by {@code getPath} was
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* added to the selection. A return value of {@code true}
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* indicates the path identified by {@code getPath} was added to
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* the selection. A return value of {@code false} indicates {@code
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* getPath} was selected, but is no longer selected.
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*
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* @return {@code true} if {@code getPath} was added to the selection,
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* {@code false} otherwise
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*/
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public boolean isAddedPath() {
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return areNew[0];
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}
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/**
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* Returns whether the specified path was added to the selection.
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* A return value of {@code true} indicates the path identified by
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* {@code path} was added to the selection. A return value of
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* {@code false} indicates {@code path} is no longer selected. This method
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* is only valid for the paths returned from {@code getPaths()}; invoking
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* with a path not included in {@code getPaths()} throws an
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* {@code IllegalArgumentException}.
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*
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* @param path the path to test
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* @return {@code true} if {@code path} was added to the selection,
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* {@code false} otherwise
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* @throws IllegalArgumentException if {@code path} is not contained
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* in {@code getPaths}
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* @see #getPaths
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*/
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public boolean isAddedPath(TreePath path) {
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for(int counter = paths.length - 1; counter >= 0; counter--)
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if(paths[counter].equals(path))
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return areNew[counter];
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throw new IllegalArgumentException("path is not a path identified by the TreeSelectionEvent");
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}
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/**
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* Returns whether the path at {@code getPaths()[index]} was added
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* to the selection. A return value of {@code true} indicates the
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* path was added to the selection. A return value of {@code false}
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* indicates the path is no longer selected.
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*
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* @param index the index of the path to test
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* @return {@code true} if the path was added to the selection,
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* {@code false} otherwise
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* @throws IllegalArgumentException if index is outside the range of
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* {@code getPaths}
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* @see #getPaths
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*
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* @since 1.3
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*/
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public boolean isAddedPath(int index) {
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if (paths == null || index < 0 || index >= paths.length) {
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throw new IllegalArgumentException("index is beyond range of added paths identified by TreeSelectionEvent");
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}
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return areNew[index];
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}
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/**
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* Returns the path that was previously the lead path.
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*/
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public TreePath getOldLeadSelectionPath() {
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return oldLeadSelectionPath;
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}
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/**
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* Returns the current lead path.
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*/
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public TreePath getNewLeadSelectionPath() {
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return newLeadSelectionPath;
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}
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/**
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* Returns a copy of the receiver, but with the source being newSource.
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*/
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public Object cloneWithSource(Object newSource) {
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// Fix for IE bug - crashing
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return new TreeSelectionEvent(newSource, paths,areNew,
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oldLeadSelectionPath,
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newLeadSelectionPath);
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}
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}
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