1 /*
   2  * Copyright (c) 1997, 1998, Oracle and/or its affiliates. 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.java.swing.plaf.motif;
  27 
  28 import sun.awt.AppContext;
  29 
  30 import javax.swing.*;
  31 import javax.swing.plaf.basic.BasicLabelUI;
  32 import javax.swing.plaf.ComponentUI;
  33 
  34 /**
  35  * A Motif {@literal L&F} implementation of LabelUI.
  36  * This merely sets up new default values in MotifLookAndFeel.
  37  * <p>
  38  * <strong>Warning:</strong>
  39  * Serialized objects of this class will not be compatible with
  40  * future Swing releases.  The current serialization support is appropriate
  41  * for short term storage or RMI between applications running the same
  42  * version of Swing.  A future release of Swing will provide support for
  43  * long term persistence.
  44  *
  45  * @author Amy Fowler
  46  */
  47 public class MotifLabelUI extends BasicLabelUI
  48 {
  49     private static final Object MOTIF_LABEL_UI_KEY = new Object();
  50 
  51     public static ComponentUI createUI(JComponent c) {
  52         AppContext appContext = AppContext.getAppContext();
  53         MotifLabelUI motifLabelUI =
  54                 (MotifLabelUI) appContext.get(MOTIF_LABEL_UI_KEY);
  55         if (motifLabelUI == null) {
  56             motifLabelUI = new MotifLabelUI();
  57             appContext.put(MOTIF_LABEL_UI_KEY, motifLabelUI);
  58         }
  59         return motifLabelUI;
  60     }
  61 }