1 /*
   2  * Copyright (c) 1998, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package javax.swing.colorchooser;
  27 
  28 import java.awt.*;
  29 import java.io.*;
  30 
  31 
  32 /**
  33   * Center-positioning layout manager.
  34   * @author Tom Santos
  35   * @author Steve Wilson
  36   */
  37 class CenterLayout implements LayoutManager, Serializable {
  38     public void addLayoutComponent(String name, Component comp) { }
  39     public void removeLayoutComponent(Component comp) { }
  40 
  41     public Dimension preferredLayoutSize( Container container ) {
  42         Component c = container.getComponent( 0 );
  43         if ( c != null ) {
  44             Dimension size = c.getPreferredSize();
  45             Insets insets = container.getInsets();
  46             size.width += insets.left + insets.right;
  47             size.height += insets.top + insets.bottom;
  48             return size;
  49         }
  50         else {
  51             return new Dimension( 0, 0 );
  52         }
  53     }
  54 
  55     public Dimension minimumLayoutSize(Container cont) {
  56         return preferredLayoutSize(cont);
  57     }
  58 
  59     public void layoutContainer(Container container) {
  60         try {
  61            Component c = container.getComponent( 0 );
  62 
  63            c.setSize( c.getPreferredSize() );
  64            Dimension size = c.getSize();
  65            Dimension containerSize = container.getSize();
  66            Insets containerInsets = container.getInsets();
  67            containerSize.width -= containerInsets.left + containerInsets.right;
  68            containerSize.height -= containerInsets.top + containerInsets.bottom;
  69            int componentLeft = (containerSize.width / 2) - (size.width / 2);
  70            int componentTop = (containerSize.height / 2) - (size.height / 2);
  71            componentLeft += containerInsets.left;
  72            componentTop += containerInsets.top;
  73 
  74             c.setBounds( componentLeft, componentTop, size.width, size.height );
  75          }
  76          catch( Exception e ) {
  77          }
  78     }
  79 }