/*

 * Copyright (c) 1998, 2003, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

package javax.swing.plaf.basic;

import java.awt.*;

import java.io.*;

/**

  * Center-positioning layout manager.

  * @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);

        }

    }

}