GUI/TreeModel.cs
author moel.mich
Sat, 05 Jun 2010 18:59:54 +0000
changeset 133 9ad699538c89
child 344 3145aadca3d2
permissions -rw-r--r--
Fixed Issue 65.
     1 /*
     2   
     3   Version: MPL 1.1/GPL 2.0/LGPL 2.1
     4 
     5   The contents of this file are subject to the Mozilla Public License Version
     6   1.1 (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.mozilla.org/MPL/
    10 
    11   Software distributed under the License is distributed on an "AS IS" basis,
    12   WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
    13   for the specific language governing rights and limitations under the License.
    14 
    15   The Original Code is the Open Hardware Monitor code.
    16 
    17   The Initial Developer of the Original Code is 
    18   Michael Möller <m.moeller@gmx.ch>.
    19   Portions created by the Initial Developer are Copyright (C) 2009-2010
    20   the Initial Developer. All Rights Reserved.
    21 
    22   Contributor(s):
    23 
    24   Alternatively, the contents of this file may be used under the terms of
    25   either the GNU General Public License Version 2 or later (the "GPL"), or
    26   the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
    27   in which case the provisions of the GPL or the LGPL are applicable instead
    28   of those above. If you wish to allow use of your version of this file only
    29   under the terms of either the GPL or the LGPL, and not to allow others to
    30   use your version of this file under the terms of the MPL, indicate your
    31   decision by deleting the provisions above and replace them with the notice
    32   and other provisions required by the GPL or the LGPL. If you do not delete
    33   the provisions above, a recipient may use your version of this file under
    34   the terms of any one of the MPL, the GPL or the LGPL.
    35  
    36 */
    37 
    38 using System;
    39 using System.Collections;
    40 using System.Collections.Generic;
    41 using System.Collections.ObjectModel;
    42 using Aga.Controls.Tree;
    43 
    44 namespace OpenHardwareMonitor.GUI {
    45   public class TreeModel : ITreeModel {
    46 
    47     private Node root;
    48     private bool forceVisible = false;
    49 
    50     public TreeModel() {
    51       root = new Node();
    52       root.Model = this;
    53     }
    54 
    55     public TreePath GetPath(Node node) {
    56       if (node == root)
    57         return TreePath.Empty;
    58       else {
    59         Stack<object> stack = new Stack<object>();
    60         while (node != root) {
    61           stack.Push(node);
    62           node = node.Parent;
    63         }
    64         return new TreePath(stack.ToArray());
    65       }
    66     }
    67 
    68     public Collection<Node> Nodes {
    69       get { return root.Nodes; }
    70     }
    71 
    72     private Node GetNode(TreePath treePath) {
    73       Node parent = root;
    74       foreach (object obj in treePath.FullPath) {
    75         Node node = obj as Node;
    76         if (node == null || node.Parent != parent)
    77           return null;
    78         parent = node;
    79       }
    80       return parent;
    81     }
    82 
    83     public IEnumerable GetChildren(TreePath treePath) {
    84       Node node = GetNode(treePath);
    85       if (node != null) {
    86         foreach (Node n in node.Nodes)
    87           if (forceVisible || n.IsVisible)
    88             yield return n;
    89       } else {
    90         yield break;
    91       }
    92     }
    93 
    94     public bool IsLeaf(TreePath treePath) {
    95       return false;
    96     }
    97 
    98     public bool ForceVisible {
    99       get {
   100         return forceVisible;
   101       }
   102       set {
   103         if (value != forceVisible) {
   104           forceVisible = value;
   105           OnStructureChanged(root);
   106         }
   107       }
   108     }
   109 
   110     #pragma warning disable 67
   111     public event EventHandler<TreeModelEventArgs> NodesChanged;
   112     public event EventHandler<TreePathEventArgs> StructureChanged;
   113     public event EventHandler<TreeModelEventArgs> NodesInserted;
   114     public event EventHandler<TreeModelEventArgs> NodesRemoved;
   115     #pragma warning restore 67
   116 
   117     public void OnNodeChanged(Node parent, int index, Node node) {
   118       if (NodesChanged != null && parent != null) {
   119         TreePath path = GetPath(parent);
   120         if (path != null) 
   121           NodesChanged(this, new TreeModelEventArgs(
   122             path, new int[] { index }, new object[] { node }));
   123       }
   124     }
   125 
   126     public void OnStructureChanged(Node node) {
   127       if (StructureChanged != null)
   128         StructureChanged(this,
   129           new TreeModelEventArgs(GetPath(node), new object[0]));
   130     }
   131 
   132     public void OnNodeInserted(Node parent, int index, Node node) {
   133       if (NodesInserted != null) {
   134         TreeModelEventArgs args = new TreeModelEventArgs(GetPath(parent),
   135           new int[] { index }, new object[] { node });
   136         NodesInserted(this, args);
   137       }
   138 
   139     }
   140 
   141     public void OnNodeRemoved(Node parent, int index, Node node) {
   142       if (NodesRemoved != null) {
   143         TreeModelEventArgs args = new TreeModelEventArgs(GetPath(parent), 
   144           new int[] { index }, new object[] { node });
   145         NodesRemoved(this, args);
   146       }
   147     }
   148 
   149   }
   150 }