/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
    * 
    *      http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.log4j.lf5.viewer.categoryexplorer;
  
  import java.awt.Component;
  import java.awt.event.MouseEvent;
  import java.util.EventObject;
  
  import javax.swing.JTable;
  import javax.swing.JTree;
  import javax.swing.event.CellEditorListener;
  import javax.swing.event.ChangeEvent;
  import javax.swing.event.EventListenerList;
  import javax.swing.table.TableCellEditor;
  import javax.swing.tree.TreeCellEditor;
  
  /**
   * CategoryAbstractCellEditor.  Base class to handle the some common
   * details of cell editing.
   *
   * @author Michael J. Sikorsky
   * @author Robert Shaw
   */
  
  // Contributed by ThoughtWorks Inc.
  
  public class CategoryAbstractCellEditor implements TableCellEditor, TreeCellEditor {
    //--------------------------------------------------------------------------
    //   Constants:
    //--------------------------------------------------------------------------
  
    //--------------------------------------------------------------------------
    //   Protected Variables:
    //--------------------------------------------------------------------------
    protected EventListenerList _listenerList = new EventListenerList();
    protected Object _value;
    protected ChangeEvent _changeEvent = null;
    protected int _clickCountToStart = 1;
  
    //--------------------------------------------------------------------------
    //   Private Variables:
    //--------------------------------------------------------------------------
  
    //--------------------------------------------------------------------------
    //   Constructors:
    //--------------------------------------------------------------------------
  
    //--------------------------------------------------------------------------
    //   Public Methods:
    //--------------------------------------------------------------------------
  
    public Object getCellEditorValue() {
      return _value;
    }
  
    public void setCellEditorValue(Object value) {
      _value = value;
    }
  
    public void setClickCountToStart(int count) {
      _clickCountToStart = count;
    }
  
    public int getClickCountToStart() {
      return _clickCountToStart;
    }
  
    public boolean isCellEditable(EventObject anEvent) {
      if (anEvent instanceof MouseEvent) {
        if (((MouseEvent) anEvent).getClickCount() < _clickCountToStart) {
          return false;
        }
      }
      return true;
    }
  
    public boolean shouldSelectCell(EventObject anEvent) {
      if (this.isCellEditable(anEvent)) {
        if (anEvent == null ||
            ((MouseEvent) anEvent).getClickCount() >= _clickCountToStart) {
          return true;
        }
      }
      return false;
    }
 
   public boolean stopCellEditing() {
     fireEditingStopped();
     return true;
   }
 
   public void cancelCellEditing() {
     fireEditingCanceled();
   }
 
   public void addCellEditorListener(CellEditorListener l) {
     _listenerList.add(CellEditorListener.class, l);
   }
 
   public void removeCellEditorListener(CellEditorListener l) {
     _listenerList.remove(CellEditorListener.class, l);
   }
 
   public Component getTreeCellEditorComponent(
       JTree tree, Object value,
       boolean isSelected,
       boolean expanded,
       boolean leaf, int row) {
     return null;
   }
 
   public Component getTableCellEditorComponent(
       JTable table, Object value,
       boolean isSelected,
       int row, int column) {
     return null;
   }
 
   //--------------------------------------------------------------------------
   //   Protected Methods:
   //--------------------------------------------------------------------------
   protected void fireEditingStopped() {
     Object[] listeners = _listenerList.getListenerList();
 
     for (int i = listeners.length - 2; i >= 0; i -= 2) {
       if (listeners[i] == CellEditorListener.class) {
         if (_changeEvent == null) {
           _changeEvent = new ChangeEvent(this);
         }
 
         ((CellEditorListener) listeners[i + 1]).editingStopped(_changeEvent);
       }
     }
   }
 
   protected void fireEditingCanceled() {
     Object[] listeners = _listenerList.getListenerList();
 
     for (int i = listeners.length - 2; i >= 0; i -= 2) {
       if (listeners[i] == CellEditorListener.class) {
         if (_changeEvent == null) {
           _changeEvent = new ChangeEvent(this);
         }
 
         ((CellEditorListener) listeners[i + 1]).editingCanceled(_changeEvent);
       }
     }
   }
 
   //--------------------------------------------------------------------------
   //   Private Methods:
   //--------------------------------------------------------------------------
 
   //--------------------------------------------------------------------------
   //   Nested Top-Level Classes or Interfaces:
   //--------------------------------------------------------------------------
 
 }