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package javax.swing.plaf;

import javax.swing.JComboBox;

Pluggable look and feel interface for JComboBox.
Author:
Arnaud Weber, Tom Santos/**
 * Pluggable look and feel interface for JComboBox.
 *
 * @author Arnaud Weber
 * @author Tom Santos
 */
public abstract class ComboBoxUI extends ComponentUI {

    
Constructor for subclasses to call.
/**
     * Constructor for subclasses to call.
     */
    protected ComboBoxUI() {}

    
Set the visibility of the popup
Params:
c – a JComboBox
v – a boolean determining the visibilty of the popup/**
     * Set the visibility of the popup
     *
     * @param c a {@code JComboBox}
     * @param v a {@code boolean} determining the visibilty of the popup
     */
    public abstract void setPopupVisible( JComboBox<?> c, boolean v );

    
Determine the visibility of the popup
Params:
c – a JComboBox
Returns:
true if popup of the JComboBox is visible/**
     * Determine the visibility of the popup
     *
     * @param c a {@code JComboBox}
     * @return true if popup of the {@code JComboBox} is visible
     */
    public abstract boolean isPopupVisible( JComboBox<?> c );

    
Determine whether or not the combo box itself is traversable
Params:
c – a JComboBox
Returns:
true if the given JComboBox is traversable/**
     * Determine whether or not the combo box itself is traversable
     *
     * @param c a {@code JComboBox}
     * @return true if the given {@code JComboBox} is traversable
     */
    public abstract boolean isFocusTraversable( JComboBox<?> c );
}