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    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 org.apache.log4j.chainsaw.help.HelpManager;
    20
    21  import javax.swing.*;
    22  import java.awt.event.ActionEvent;
    23
    24
    25  /**
    26   * @author psmith
    27   */
    28  class CommonActions {
    29      private static CommonActions instance = null;
    30      private static Action SHOW_RELEASE_NOTE;
    31
    32
    33      private void initActions() {
    34          SHOW_RELEASE_NOTE = new AbstractAction("Release Notes") {
    35
    36              public void actionPerformed(ActionEvent e) {
    37                  HelpManager.getInstance().setHelpURL(ChainsawConstants.RELEASE_NOTES_URL);
    38
    39              }
    40          };
    41      }
    42
    43      static synchronized CommonActions getInstance() {
    44          if (instance == null) {
    45              instance = new CommonActions();
    46          }
    47          return instance;
    48      }
    49
    50      /**
    51       *
    52       */
    53      private CommonActions() {
    54          initActions();
    55      }
    56
    57      /**
    58       * @return
    59       */
    60      public Action getShowReleaseNotes() {
    61          return SHOW_RELEASE_NOTE;
    62      }
    63
    64  }