| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2003 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package javax.swing.plaf.basic; |
| 27 | |
| 28 | |
| 29 | import java.awt.*; |
| 30 | import java.io.*; |
| 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 | |
| 47 | return new Dimension(size.width + insets.left + insets.right, |
| 48 | size.height + insets.top + insets.bottom); |
| 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 | if (container.getComponentCount() > 0) { |
| 61 | Component c = container.getComponent(0); |
| 62 | Dimension pref = c.getPreferredSize(); |
| 63 | int containerWidth = container.getWidth(); |
| 64 | int containerHeight = container.getHeight(); |
| 65 | Insets containerInsets = container.getInsets(); |
| 66 | |
| 67 | containerWidth -= containerInsets.left + |
| 68 | containerInsets.right; |
| 69 | containerHeight -= containerInsets.top + |
| 70 | containerInsets.bottom; |
| 71 | |
| 72 | int left = (containerWidth - pref.width) / 2 + |
| 73 | containerInsets.left; |
| 74 | int right = (containerHeight - pref.height) / 2 + |
| 75 | containerInsets.top; |
| 76 | |
| 77 | c.setBounds(left, right, pref.width, pref.height); |
| 78 | } |
| 79 | } |
| 80 | } |