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External/Aga.Controls/Tree/Node.cs
author Stephane Lenclud
Sat, 30 Jan 2016 23:01:51 +0100
branchMiniDisplay
changeset 454 f84878f52cd9
permissions -rw-r--r--
Disabling Nuvoton NCT6791D because of fan full speed bug on Asus Z97 WS. 
     1 using System;

     2 using System.Collections.Generic;

     3 using System.Text;

     4 using System.Collections.ObjectModel;

     5 using System.Windows.Forms;

     6 using System.Drawing;

     7 

     8 namespace Aga.Controls.Tree

     9 {

    10 	public class Node

    11 	{

    12 		#region NodeCollection

    13 

    14 		private class NodeCollection : Collection<Node>

    15 		{

    16 			private Node _owner;

    17 

    18 			public NodeCollection(Node owner)

    19 			{

    20 				_owner = owner;

    21 			}

    22 

    23 			protected override void ClearItems()

    24 			{

    25 				while (this.Count != 0)

    26 					this.RemoveAt(this.Count - 1);

    27 			}

    28 

    29 			protected override void InsertItem(int index, Node item)

    30 			{

    31 				if (item == null)

    32 					throw new ArgumentNullException("item");

    33 

    34 				if (item.Parent != _owner)

    35 				{

    36 					if (item.Parent != null)

    37 						item.Parent.Nodes.Remove(item);

    38 					item._parent = _owner;

    39 					item._index = index;

    40 					for (int i = index; i < Count; i++)

    41 						this[i]._index++;

    42 					base.InsertItem(index, item);

    43 

    44 					TreeModel model = _owner.FindModel();

    45 					if (model != null)

    46 						model.OnNodeInserted(_owner, index, item);

    47 				}

    48 			}

    49 

    50 			protected override void RemoveItem(int index)

    51 			{

    52 				Node item = this[index];

    53 				item._parent = null;

    54 				item._index = -1;

    55 				for (int i = index + 1; i < Count; i++)

    56 					this[i]._index--;

    57 				base.RemoveItem(index);

    58 

    59 				TreeModel model = _owner.FindModel();

    60 				if (model != null)

    61 					model.OnNodeRemoved(_owner, index, item);

    62 			}

    63 

    64 			protected override void SetItem(int index, Node item)

    65 			{

    66 				if (item == null)

    67 					throw new ArgumentNullException("item");

    68 

    69 				RemoveAt(index);

    70 				InsertItem(index, item);

    71 			}

    72 		}

    73 

    74 		#endregion

    75 

    76 		#region Properties

    77 

    78 		private TreeModel _model;

    79 		internal TreeModel Model

    80 		{

    81 			get { return _model; }

    82 			set { _model = value; }

    83 		}

    84 

    85 		private NodeCollection _nodes;

    86 		public Collection<Node> Nodes

    87 		{

    88 			get { return _nodes; }

    89 		}

    90 

    91 		private Node _parent;

    92 		public Node Parent

    93 		{

    94 			get { return _parent; }

    95 			set 

    96 			{

    97 				if (value != _parent)

    98 				{

    99 					if (_parent != null)

   100 						_parent.Nodes.Remove(this);

   101 

   102 					if (value != null)

   103 						value.Nodes.Add(this);

   104 				}

   105 			}

   106 		}

   107 

   108 		private int _index = -1;

   109 		public int Index

   110 		{

   111 			get

   112 			{

   113 				return _index;

   114 			}

   115 		}

   116 

   117 		public Node PreviousNode

   118 		{

   119 			get

   120 			{

   121 				int index = Index;

   122 				if (index > 0)

   123 					return _parent.Nodes[index - 1];

   124 				else

   125 					return null;

   126 			}

   127 		}

   128 

   129 		public Node NextNode

   130 		{

   131 			get

   132 			{

   133 				int index = Index;

   134 				if (index >= 0 && index < _parent.Nodes.Count - 1)

   135 					return _parent.Nodes[index + 1];

   136 				else

   137 					return null;

   138 			}

   139 		}

   140 

   141 		private string _text;

   142 		public virtual string Text

   143 		{

   144 			get { return _text; }

   145 			set 

   146 			{

   147 				if (_text != value)

   148 				{

   149 					_text = value;

   150 					NotifyModel();

   151 				}

   152 			}

   153 		}

   154 

   155 		private CheckState _checkState;

   156 		public virtual CheckState CheckState

   157 		{

   158 			get { return _checkState; }

   159 			set 

   160 			{

   161 				if (_checkState != value)

   162 				{

   163 					_checkState = value;

   164 					NotifyModel();

   165 				}

   166 			}

   167 		}

   168 

   169 		private Image _image;

   170 		public Image Image

   171 		{

   172 			get { return _image; }

   173 			set 

   174 			{

   175 				if (_image != value)

   176 				{

   177 					_image = value;

   178 					NotifyModel();

   179 				}

   180 			}

   181 		}

   182 

   183 		private object _tag;

   184 		public object Tag

   185 		{

   186 			get { return _tag; }

   187 			set { _tag = value; }

   188 		}

   189 

   190 		public bool IsChecked

   191 		{

   192 			get 

   193 			{ 

   194 				return CheckState != CheckState.Unchecked;

   195 			}

   196 			set 

   197 			{

   198 				if (value)

   199 					CheckState = CheckState.Checked;

   200 				else

   201 					CheckState = CheckState.Unchecked;

   202 			}

   203 		}

   204 

   205 		public virtual bool IsLeaf

   206 		{

   207 			get

   208 			{

   209 				return false;

   210 			}

   211 		}

   212 

   213 		#endregion

   214 

   215 		public Node()

   216 			: this(string.Empty)

   217 		{

   218 		}

   219 

   220 		public Node(string text)

   221 		{

   222 			_text = text;

   223 			_nodes = new NodeCollection(this);

   224 		}

   225 

   226 		public override string ToString()

   227 		{

   228 			return Text;

   229 		}

   230 

   231 		private TreeModel FindModel()

   232 		{

   233 			Node node = this;

   234 			while (node != null)

   235 			{

   236 				if (node.Model != null)

   237 					return node.Model;

   238 				node = node.Parent;

   239 			}

   240 			return null;

   241 		}

   242 

   243 		protected void NotifyModel()

   244 		{

   245 			TreeModel model = FindModel();

   246 			if (model != null && Parent != null)

   247 			{

   248 				TreePath path = model.GetPath(Parent);

   249 				if (path != null)

   250 				{

   251 					TreeModelEventArgs args = new TreeModelEventArgs(path, new int[] { Index }, new object[] { this });

   252 					model.OnNodesChanged(args);

   253 				}

   254 			}

   255 		}

   256 	}

   257 }
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