1 /*
   2  * Copyright (c) 1998, 2014, 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     private static final long serialVersionUID = 6948189423011048265L;
  39 
  40     public void addLayoutComponent(String name, Component comp) { }
  41     public void removeLayoutComponent(Component comp) { }
  42 
  43     public Dimension preferredLayoutSize( Container container ) {
  44         Component c = container.getComponent( 0 );
  45         if ( c != null ) {
  46             Dimension size = c.getPreferredSize();
  47             Insets insets = container.getInsets();
  48             size.width += insets.left + insets.right;
  49             size.height += insets.top + insets.bottom;
  50             return size;
  51         }
  52         else {
  53             return new Dimension( 0, 0 );
  54         }
  55     }
  56 
  57     public Dimension minimumLayoutSize(Container cont) {
  58         return preferredLayoutSize(cont);
  59     }
  60 
  61     public void layoutContainer(Container container) {
  62         try {
  63            Component c = container.getComponent( 0 );
  64 
  65            c.setSize( c.getPreferredSize() );
  66            Dimension size = c.getSize();
  67            Dimension containerSize = container.getSize();
  68            Insets containerInsets = container.getInsets();
  69            containerSize.width -= containerInsets.left + containerInsets.right;
  70            containerSize.height -= containerInsets.top + containerInsets.bottom;
  71            int componentLeft = (containerSize.width / 2) - (size.width / 2);
  72            int componentTop = (containerSize.height / 2) - (size.height / 2);
  73            componentLeft += containerInsets.left;
  74            componentTop += containerInsets.top;
  75 
  76             c.setBounds( componentLeft, componentTop, size.width, size.height );
  77          }
  78          catch( Exception e ) {
  79          }
  80     }
  81 }