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package javax.swing.colorchooser;

import java.awt.*;
import java.io.*;


Center-positioning layout manager.
Author:Tom Santos, Steve Wilson
/** * Center-positioning layout manager. * @author Tom Santos * @author Steve Wilson */
@SuppressWarnings("serial") // Same-version serialization only 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(); size.width += insets.left + insets.right; size.height += insets.top + insets.bottom; return size; } else { return new Dimension( 0, 0 ); } } public Dimension minimumLayoutSize(Container cont) { return preferredLayoutSize(cont); } public void layoutContainer(Container container) { try { Component c = container.getComponent( 0 ); c.setSize( c.getPreferredSize() ); Dimension size = c.getSize(); Dimension containerSize = container.getSize(); Insets containerInsets = container.getInsets(); containerSize.width -= containerInsets.left + containerInsets.right; containerSize.height -= containerInsets.top + containerInsets.bottom; int componentLeft = (containerSize.width / 2) - (size.width / 2); int componentTop = (containerSize.height / 2) - (size.height / 2); componentLeft += containerInsets.left; componentTop += containerInsets.top; c.setBounds( componentLeft, componentTop, size.width, size.height ); } catch( Exception e ) { } } }