View Javadoc

    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  package org.apache.log4j.chainsaw;
    18
    19  import java.awt.event.ActionEvent;
    20
    21  import javax.swing.AbstractAction;
    22  import javax.swing.Action;
    23
    24  import org.apache.log4j.chainsaw.help.HelpManager;
    25
    26
    27  /**
    28   * @author psmith
    29   *
    30   */
    31  class CommonActions
    32  {
    33      private static CommonActions instance = null;
    34      private static Action SHOW_RELEASE_NOTE;
    35
    36
    37      private void initActions() {
    38          SHOW_RELEASE_NOTE = new AbstractAction("Release Notes") {
    39
    40              public void actionPerformed(ActionEvent e)
    41              {
    42                  HelpManager.getInstance().setHelpURL(ChainsawConstants.RELEASE_NOTES_URL);
    43
    44              }};
    45      }
    46
    47      static synchronized CommonActions getInstance() {
    48          if(instance==null) {
    49              instance = new CommonActions();
    50          }
    51          return instance;
    52      }
    53
    54      /**
    55       *
    56       */
    57      private CommonActions()
    58      {
    59          initActions();
    60      }
    61
    62      /**
    63       * @return
    64       */
    65      public Action getShowReleaseNotes()
    66      {
    67          return SHOW_RELEASE_NOTE;
    68      }
    69
    70  }