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package javax.swing.event;

import java.util.EventObject;
import javax.swing.*;


An event that characterizes a change in selection. The change is limited to a a single inclusive interval. The selection of at least one index within the range will have changed. A decent ListSelectionModel implementation will keep the range as small as possible. ListSelectionListeners will generally query the source of the event for the new selected status of each potentially changed row. 

Warning:
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 java.beans package. Please see XMLEncoder. 
Author:
Hans Muller, Ray Ryan
See Also:
ListSelectionModel/**
 * An event that characterizes a change in selection. The change is limited to a
 * a single inclusive interval. The selection of at least one index within the
 * range will have changed. A decent {@code ListSelectionModel} implementation
 * will keep the range as small as possible. {@code ListSelectionListeners} 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&trade;
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author Hans Muller
 * @author Ray Ryan
 * @see ListSelectionModel
 */
@SuppressWarnings("serial") // Same-version serialization only
public class ListSelectionEvent extends EventObject
{
    private int firstIndex;
    private int lastIndex;
    private boolean isAdjusting;

    
Represents a change in selection status between firstIndex and lastIndex, inclusive. firstIndex is less than or equal to lastIndex. The selection of at least one index within the range will have changed. 
Params:
source – the Object on which the event initially occurred
firstIndex – the first index in the range, <= lastIndex
lastIndex – the last index in the range, >= firstIndex
isAdjusting – whether or not this is one in a series of
       multiple events, where changes are still being made/**
     * Represents a change in selection status between {@code firstIndex} and
     * {@code lastIndex}, inclusive. {@code firstIndex} is less than or equal to
     * {@code lastIndex}. The selection of at least one index within the range will
     * have changed.
     *
     * @param source the {@code Object} on which the event initially occurred
     * @param firstIndex the first index in the range, &lt;= lastIndex
     * @param lastIndex the last index in the range, &gt;= firstIndex
     * @param isAdjusting whether or not this is one in a series of
     *        multiple events, where changes are still being made
     */
    public ListSelectionEvent(Object source, int firstIndex, int lastIndex,
                              boolean isAdjusting)
    {
        super(source);
        this.firstIndex = firstIndex;
        this.lastIndex = lastIndex;
        this.isAdjusting = isAdjusting;
    }

    
Returns the index of the first row whose selection may have changed. getFirstIndex() <= getLastIndex() 
Returns:
the first row whose selection value may have changed,
        where zero is the first row/**
     * Returns the index of the first row whose selection may have changed.
     * {@code getFirstIndex() <= getLastIndex()}
     *
     * @return the first row whose selection value may have changed,
     *         where zero is the first row
     */
    public int getFirstIndex() { return firstIndex; }

    
Returns the index of the last row whose selection may have changed. getLastIndex() >= getFirstIndex() 
Returns:
the last row whose selection value may have changed,
        where zero is the first row/**
     * Returns the index of the last row whose selection may have changed.
     * {@code getLastIndex() >= getFirstIndex()}
     *
     * @return the last row whose selection value may have changed,
     *         where zero is the first row
     */
    public int getLastIndex() { return lastIndex; }

    
Returns whether or not this is one in a series of multiple events, where changes are still being made. See the documentation for ListSelectionModel.setValueIsAdjusting for more details on how this is used. 
Returns:
true if this is one in a series of multiple events, where changes are still being made/**
     * Returns whether or not this is one in a series of multiple events,
     * where changes are still being made. See the documentation for
     * {@link javax.swing.ListSelectionModel#setValueIsAdjusting} for
     * more details on how this is used.
     *
     * @return {@code true} if this is one in a series of multiple events,
     *         where changes are still being made
     */
    public boolean getValueIsAdjusting() { return isAdjusting; }

    
Returns a String that displays and identifies this object's properties. 
Returns:
a String representation of this object/**
     * Returns a {@code String} that displays and identifies this
     * object's properties.
     *
     * @return a String representation of this object
     */
    public String toString() {
        String properties =
            " source=" + getSource() +
            " firstIndex= " + firstIndex +
            " lastIndex= " + lastIndex +
            " isAdjusting= " + isAdjusting +
            " ";
        return getClass().getName() + "[" + properties + "]";
    }
}