firePropertyChange(HORIZONTAL_TEXT_POSITION_CHANGED_PROPERTY,
                           oldValue,
                           horizontalTextPosition);
        revalidate();
        repaint();
    }
    
    /**
     * Returns the amount of space between the text and the icon
     * displayed in this button.
     *
     * @return an int equal to the number of pixels between the text
     *         and the icon.
     * @since 1.4
     * @see #setIconTextGap
     */
    public int getIconTextGap() {
        return iconTextGap;
    }

    /**
     * If both the icon and text properties are set, this property
     * defines the space between them.  
     * <p>
     * The default value of this property is 4 pixels.
     * <p>
     * This is a JavaBeans bound property.
     * 
     * @since 1.4
     * @see #getIconTextGap
     * @beaninfo
     *        bound: true
     *    attribute: visualUpdate true
     *  description: If both the icon and text properties are set, this
     *               property defines the space between them.
     */
    public void setIconTextGap(int iconTextGap) {
        int oldValue = this.iconTextGap;
        this.iconTextGap = iconTextGap;
	iconTextGapSet = true;
        firePropertyChange("iconTextGap", oldValue, iconTextGap);
        if (iconTextGap != oldValue) {
            revalidate();
            repaint();
        }
    }

    /**
     * Verify that the {@code key} argument is a legal value for the
     * {@code horizontalAlignment} and {@code horizontalTextPosition}
     * properties. Valid values are:
     * <ul>
     *   <li>{@code SwingConstants.RIGHT}
     *   <li>{@code SwingConstants.LEFT}
     *   <li>{@code SwingConstants.CENTER}
     *   <li>{@code SwingConstants.LEADING}
     *   <li>{@code SwingConstants.TRAILING}
     * </ul>
     *
     * @param key the property value to check
     * @param exception the message to use in the
     *        {@code IllegalArgumentException} that is thrown for an invalid
     *        value
     * @exception IllegalArgumentException if key is not one of the legal
     *		  values listed above
     * @see #setHorizontalTextPosition
     * @see #setHorizontalAlignment
     */
    protected int checkHorizontalKey(int key, String exception) {
        if ((key == LEFT) ||
            (key == CENTER) ||
            (key == RIGHT) ||
            (key == LEADING) ||
            (key == TRAILING)) {
            return key;
        } else {
            throw new IllegalArgumentException(exception);
        }
    }
    
    /**
     * Verify that the {@code key} argument is a legal value for the
     * vertical properties. Valid values are:
     * <ul>
     *   <li>{@code SwingConstants.CENTER}
     *   <li>{@code SwingConstants.TOP}
     *   <li>{@code SwingConstants.BOTTOM}
     * </ul>
     *  
     * @param key the property value to check
     * @param exception the message to use in the
     *        {@code IllegalArgumentException} that is thrown for an invalid
     *        value
     * @exception IllegalArgumentException if key is not one of the legal
     *		  values listed above
     */
    protected int checkVerticalKey(int key, String exception) {
        if ((key == TOP) || (key == CENTER) || (key == BOTTOM)) {
            return key;
        } else {