jdk/src/share/classes/javax/swing/plaf/basic/BasicViewportUI.java

/*
 * Copyright 1998-2003 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.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) {
        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) {
    }
}