JProtocolTree


1   /*  
2       =========================================================================
3       Package ui - Implements user interface components
4   
5       This module is developed and maintained by PlanetaMessenger.org. 
6       Specs, New and updated versions can be found in 
7       http://www.planetamessenger.org
8       If you want contact the Team please send a email to Project Manager
9       Leidson Campos Alves Ferreira at leidson@planetamessenger.org
10  
11      Copyright (C) since 2001 by PlanetaMessenger.org
12  
13      This program is free software; you can redistribute it and/or modify
14      it under the terms of the GNU General Public License as published by
15      the Free Software Foundation; either version 2 of the License, or
16      (at your option) any later version.
17  
18      This program is distributed in the hope that it will be useful,
19      but WITHOUT ANY WARRANTY; without even the implied warranty of
20      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21      GNU General Public License for more details.
22  
23      You should have received a copy of the GNU General Public License
24      along with this program; if not, write to the Free Software
25      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26  
27      =========================================================================
28  */
29  /**
30   *
31   * $Id: JProtocolTree.java,v 1.21 2007/01/28 17:39:20 popolony2k Exp $
32   * $Author: popolony2k $
33   * $Name:  $
34   * $Revision: 1.21 $
35   * $State: Exp $
36   *
37   */
38  
39  package org.planetamessenger.mos.ui;
40  
41  import java.lang.*;
42  import javax.swing.*;
43  import javax.swing.tree.*;
44  import org.planetamessenger.mos.engine.*;
45  
46  
47  public class JProtocolTree extends JTree {
48    
49    DefaultTreeModel           treeModel          = null;
50    DefaultMutableTreeNode     rootNode           = null;
51    
52    
53  
54    /**
55     * Constructor. Creates and initializes a JTree component.
56     * @param strRootLabel The Root label of this Tree component;
57     */
58    public JProtocolTree( java.lang.String   strRootLabel ) {
59      
60      super();
61      putClientProperty( "JTree.lineStyle", "Angled" );
62      renewRenderer();
63      rootNode  = new DefaultMutableTreeNode( new JProtocolTreeItem( strRootLabel, null, -1 ) );
64      treeModel = new DefaultTreeModel( rootNode );
65      setModel( treeModel );
66    }
67    
68    /**
69     * Constructor. Initialize all class data.
70     */
71    public JProtocolTree()  {
72      
73      this( "" );
74    }
75  
76    /**
77     * Renew the object renderer. Call this method
78     * is nice when user changes current look-and-feel 
79     * to avoid non-consistent tree item updates, because
80     * all items was draw with old look-and-feel scheme.
81     */
82    public void renewRenderer()  {
83  
84      DefaultTreeCellRenderer     renderer;
85  
86      setCellRenderer( new JTreeCellRenderer() );
87      renderer = ( DefaultTreeCellRenderer ) getCellRenderer();
88      renderer.setLeafIcon( null );
89      renderer.setOpenIcon( null );
90      renderer.setClosedIcon( null );
91    }
92  
93    /**
94     * Add a new node to this Tree component.
95     * @param item The item that will be added to tree.
96     */
97    public void addNode( JProtocolTreeItem item ) {
98      
99      DefaultMutableTreeNode newNode = new DefaultMutableTreeNode( item );
100     rootNode.add( newNode );
101     reload( rootNode );
102   }
103   
104   /**
105    * Remove the specified node of tree component.
106    * @param item The item that will be removed to tree.
107    */
108   public boolean removeNode( JProtocolTreeItem item )  {
109 
110     int      nChildCount = treeModel.getChildCount( rootNode );
111     int      nCount      = 0;
112     boolean  bRemoved    = false;
113 
114     while( nCount < treeModel.getChildCount( rootNode ) )  {
115       DefaultMutableTreeNode node    = ( DefaultMutableTreeNode ) treeModel.getChild( rootNode, nCount );
116       JProtocolTreeItem      tmpItem = ( JProtocolTreeItem ) node.getUserObject();
117 
118       if( tmpItem.getPluginId() == item.getPluginId() )  {
119         rootNode.remove( node );
120         bRemoved = true;
121         nCount  = 0;
122       }
123       else
124         nCount++;
125     }
126 
127     reload( rootNode );
128     
129     return bRemoved;
130   }
131   
132   /**
133    * Return the number of Tree child items.
134    */
135   public int getChildCount()  {
136     
137     return treeModel.getChildCount( rootNode );
138   }
139 
140   /**
141    * Update the root item label tree component.
142    * @param strRootLabel The new root item label;
143    */
144   public void updateRootTreeLabel( String   strRootLabel )  {
145 
146     JProtocolTreeItem      item = ( JProtocolTreeItem ) rootNode.getUserObject();
147 
148     item.setText( strRootLabel );
149     reload();
150   }
151 
152   /**
153    * Reload complete tree node and it's childs from root node.
154    * @param The node to reload;
155    */
156   public void reload()  {
157     
158     reload( rootNode );
159   }
160 
161   /**
162    * Reload complete tree node and it's childs.
163    * @param The node to reload;
164    */
165   public void reload( TreeNode node )  {
166     
167     treeModel.reload( node );
168   }
169 
170   /**
171    * Update complete tree node and it's childs.
172    */
173   public void refresh() {
174 
175     refresh( rootNode );
176   }
177 
178   /**
179    * Update a tree node and it's childs.
180    * @param node The node to refresh;
181    */
182   private void refresh( TreeNode node ) {
183     
184     treeModel.nodeChanged( node );
185     
186     for( int nCount = 0; nCount < node.getChildCount(); nCount++ )
187       refresh( node.getChildAt( nCount ) );
188   }
189 
190   /**
191    *=========================================================================
192    * JTreeCellRenderer class implementation
193    * This is a new cell renderer implementation Protocol tree component.
194    *=========================================================================
195    */
196   private class JTreeCellRenderer  extends DefaultTreeCellRenderer {
197 
198     /**
199      * Overrides the Cell renderer method of this JTreeCellRenderer.<br>
200      * Show the check icon (disable option) when plugin is selected to be installed;
201      * See JDK API for the parameters.
202      */
203     public java.awt.Component   getTreeCellRendererComponent( javax.swing.JTree   tree, java.lang.Object   objValue, boolean bSelected, boolean bExpanded, boolean bIsLeaf, int nRow, boolean bHasFocus ) {
204 
205       super.getTreeCellRendererComponent( tree, objValue, bSelected, bExpanded, bIsLeaf, nRow, bHasFocus );
206       
207       try  {
208 
209         DefaultMutableTreeNode   node = ( DefaultMutableTreeNode ) objValue;
210         JProtocolTreeItem        item = ( JProtocolTreeItem ) node.getUserObject();
211 
212         // Add/remove the checked icon
213         if( item.getPluginId() >= 0 )  {
214           if( item.getInstall() )
215             setIcon( JSharedObjects.getResources().getIcon( JResources.INSTALL_PLUGIN_ICON ) );
216           else
217             setIcon( JSharedObjects.getResources().getIcon( JResources.UNINSTALL_PLUGIN_ICON ) );
218         }
219       } catch( Exception   e )  {
220         System.err.println( "JProtocolTree.JTreeCellRenderer.getTreeCellRendererComponent() - Invalid item object. Ignoring event" );
221       }
222 
223       return this;
224     }
225   }  // JTreeCellRenderer Class
226 }
227 
228 // JProtocolTree Class
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