basicviewportui.java

来自「java jdk 1.4的源码」· Java 代码 · 共 56 行

/*
 * @(#)BasicViewportUI.java	1.7 03/01/23
 *
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

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
 *
 * @version 1.1 05/01/98
 * @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");
    }

    protected void uninstallDefaults(JComponent c) {
    }
}