| /* |
| * Copyright (c) 1998, 2014, 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 |
| * questions. |
| */ |
| |
| package javax.swing.plaf.basic; |
| |
| |
| import java.awt.*; |
| import java.io.*; |
| |
| /** |
| * 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(); |
| |
| 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); |
| } |
| } |
| } |