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/* * Copyright (c) 1998, 2010, 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 javax.swing.*;import javax.swing.border.*;import javax.swing.plaf.*;import java.awt.*;import java.awt.event.*;  /** * BasicViewport implementation * * @author Rich Schiavi */public class BasicViewportUI extends ViewportUI {     // Shared UI object    private static ViewportUI viewportUI;     public static ComponentUI createUI(JComponent c) {        if(viewportUI == null) {            viewportUI = new BasicViewportUI();        }        return viewportUI;    }     public void installUI(JComponent c) {        super.installUI(c);        installDefaults(c);    }     public void uninstallUI(JComponent c) {        uninstallDefaults(c);        super.uninstallUI(c);    }     protected void installDefaults(JComponent c) {        LookAndFeel.installColorsAndFont(c,                                         "Viewport.background",                                         "Viewport.foreground",                                         "Viewport.font");        LookAndFeel.installProperty(c, "opaque", Boolean.TRUE);    }     protected void uninstallDefaults(JComponent c) {    }}