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