/* * @(#)CenterLayout.java	1.12 03/12/19 * * Copyright 2004 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */package javax.swing.plaf.basic;import java.awt.*;import java.io.*;/**  * Center-positioning layout manager.  * @version 1.12 12/19/03  * @author Tom Santos  * @author Steve Wilson  */class CenterLayout implements LayoutManager, Serializable {    public void addLayoutComponent(String name, Component comp) { }    public void removeLayoutComponent(Component comp) { }    public Dimension preferredLayoutSize( Container container ) {	Component c = container.getComponent( 0 );	if ( c != null ) {            Dimension size = c.getPreferredSize();            Insets insets = container.getInsets();            return new Dimension(size.width + insets.left + insets.right,                                 size.height + insets.top + insets.bottom);	}	else {	    return new Dimension( 0, 0 );	}    }    public Dimension minimumLayoutSize(Container cont) {    	return preferredLayoutSize(cont);    }    public void layoutContainer(Container container) {        if (container.getComponentCount() > 0) {            Component c = container.getComponent(0);            Dimension pref = c.getPreferredSize();            int containerWidth = container.getWidth();            int containerHeight = container.getHeight();            Insets containerInsets = container.getInsets();            containerWidth -= containerInsets.left +                              containerInsets.right;            containerHeight -= containerInsets.top +                               containerInsets.bottom;            int left = (containerWidth - pref.width) / 2 +                            containerInsets.left;            int right = (containerHeight - pref.height) / 2 +                            containerInsets.top;            c.setBounds(left, right, pref.width, pref.height);        }    }}