alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

What this is

This file is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Other links

The source code

/*
 * Copyright (C) The Apache Software Foundation. All rights reserved.
 *
 * This software is published under the terms of the Apache Software
 * License version 1.1, a copy of which has been included with this
 * distribution in the LICENSE.txt file.
 */
package org.apache.log4j.lf5.viewer.categoryexplorer;

import javax.swing.*;
import javax.swing.event.TreeModelEvent;
import javax.swing.tree.TreePath;
import java.awt.event.MouseEvent;

/**
 * CategoryExplorerTree
 *
 * @author Michael J. Sikorsky
 * @author Robert Shaw
 * @author Brent Sprecher
 * @author Brad Marlborough
 */

// Contributed by ThoughtWorks Inc.

public class CategoryExplorerTree extends JTree {
  //--------------------------------------------------------------------------
  //   Constants:
  //--------------------------------------------------------------------------

  //--------------------------------------------------------------------------
  //   Protected Variables:
  //--------------------------------------------------------------------------
  protected CategoryExplorerModel _model;
  protected boolean _rootAlreadyExpanded = false;

  //--------------------------------------------------------------------------
  //   Private Variables:
  //--------------------------------------------------------------------------

  //--------------------------------------------------------------------------
  //   Constructors:
  //--------------------------------------------------------------------------

  /**
   * Construct a CategoryExplorerTree with a specific model.
   */
  public CategoryExplorerTree(CategoryExplorerModel model) {
    super(model);

    _model = model;
    init();
  }

  /**
   * Construct a CategoryExplorerTree and create a default CategoryExplorerModel.
   */
  public CategoryExplorerTree() {
    super();

    CategoryNode rootNode = new CategoryNode("Categories");

    _model = new CategoryExplorerModel(rootNode);

    setModel(_model);

    init();
  }

  //--------------------------------------------------------------------------
  //   Public Methods:
  //--------------------------------------------------------------------------

  public CategoryExplorerModel getExplorerModel() {
    return (_model);
  }

  public String getToolTipText(MouseEvent e) {

    try {
      return super.getToolTipText(e);
    } catch (Exception ex) {
      return "";
    }

  }

  //--------------------------------------------------------------------------
  //   Protected Methods:
  //--------------------------------------------------------------------------

  protected void init() {
    // Put visible lines on the JTree.
    putClientProperty("JTree.lineStyle", "Angled");

    // Configure the Tree with the appropriate Renderers and Editors.

    CategoryNodeRenderer renderer = new CategoryNodeRenderer();
    setEditable(true);
    setCellRenderer(renderer);

    CategoryNodeEditor editor = new CategoryNodeEditor(_model);

    setCellEditor(new CategoryImmediateEditor(this,
        new CategoryNodeRenderer(),
        editor));
    setShowsRootHandles(true);

    setToolTipText("");

    ensureRootExpansion();

  }

  protected void expandRootNode() {
    if (_rootAlreadyExpanded) {
      return;
    }
    _rootAlreadyExpanded = true;
    TreePath path = new TreePath(_model.getRootCategoryNode().getPath());
    expandPath(path);
  }

  protected void ensureRootExpansion() {
    _model.addTreeModelListener(new TreeModelAdapter() {
      public void treeNodesInserted(TreeModelEvent e) {
        expandRootNode();
      }
    });
  }

  //--------------------------------------------------------------------------
  //   Private Methods:
  //--------------------------------------------------------------------------

  //--------------------------------------------------------------------------
  //   Nested Top-Level Classes or Interfaces:
  //--------------------------------------------------------------------------

}






... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.