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package javax.swing;

import javax.swing.event.*;

A model that supports at most one indexed selection.
Author:
Dave Moore/**
 * A model that supports at most one indexed selection.
 *
 * @author Dave Moore
 */
public interface SingleSelectionModel {
    
Returns the model's selection.
See Also:
setSelectedIndex
Returns:
 the model's selection, or -1 if there is no selection/**
     * Returns the model's selection.
     *
     * @return  the model's selection, or -1 if there is no selection
     * @see     #setSelectedIndex
     */
    public int getSelectedIndex();

    
Sets the model's selected index to index.
Notifies any listeners if the model changes
Params:
index – an int specifying the model selection
See Also:
getSelectedIndex
addChangeListener/**
     * Sets the model's selected index to <I>index</I>.
     *
     * Notifies any listeners if the model changes
     *
     * @param index an int specifying the model selection
     * @see   #getSelectedIndex
     * @see   #addChangeListener
     */
    public void setSelectedIndex(int index);

    
Clears the selection (to -1).
/**
     * Clears the selection (to -1).
     */
    public void clearSelection();

    
Returns true if the selection model currently has a selected value.
Returns:
true if a value is currently selected/**
     * Returns true if the selection model currently has a selected value.
     * @return true if a value is currently selected
     */
    public boolean isSelected();

    
Adds listener as a listener to changes in the model.
Params:
listener – the ChangeListener to add/**
     * Adds <I>listener</I> as a listener to changes in the model.
     * @param listener the ChangeListener to add
     */
    void addChangeListener(ChangeListener listener);

    
Removes listener as a listener to changes in the model.
Params:
listener – the ChangeListener to remove/**
     * Removes <I>listener</I> as a listener to changes in the model.
     * @param listener the ChangeListener to remove
     */
    void removeChangeListener(ChangeListener listener);
}