/*
 * Copyright (c) 1997, 2002, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package javax.swing;

import javax.swing.event.*;

/**
 * A model that supports at most one indexed selection.
 *
 * @author Dave Moore
 */
public interface SingleSelectionModel {
 /**
 * 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 <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).
 */
 public void clearSelection();

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

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

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