OpenHardwareMonitor-retired: External/Aga.Controls/Tree/IncrementalSearch.cs@5715aefd2bcc

     1 using System;

     2 using System.Collections.Generic;

     3 using System.Text;

     4 using Aga.Controls.Tree.NodeControls;

     5 using System.ComponentModel;

     6 using System.Drawing;

     7 using System.Windows.Forms;

     9 namespace Aga.Controls.Tree

    10 {

    11 	internal class IncrementalSearch

    12 	{

    13 		private const int SearchTimeout = 300; //end of incremental search timeot in msec

    15 		private TreeViewAdv _tree;

    16 		private TreeNodeAdv _currentNode;

    17 		private string _searchString = "";

    18 		private DateTime _lastKeyPressed = DateTime.Now;

    20 		public IncrementalSearch(TreeViewAdv tree)

    21 		{

    22 			_tree = tree;

    23 		}

    25 		public void Search(Char value)

    26 		{

    27 			if (!Char.IsControl(value))

    28 			{

    29 				Char ch = Char.ToLowerInvariant(value);

    30 				DateTime dt = DateTime.Now;

    31 				TimeSpan ts = dt - _lastKeyPressed;

    32 				_lastKeyPressed = dt;

    33 				if (ts.TotalMilliseconds < SearchTimeout)

    34 				{

    35 					if (_searchString == value.ToString())

    36 						FirstCharSearch(ch);

    37 					else

    38 						ContinuousSearch(ch);

    39 				}

    40 				else

    41 				{

    42 					FirstCharSearch(ch);

    43 				}

    44 			}

    45 		}

    47 		private void ContinuousSearch(Char value)

    48 		{

    49 			if (value == ' ' && String.IsNullOrEmpty(_searchString))

    50 				return; //Ingnore leading space

    52 			_searchString += value;

    53 			DoContinuousSearch();

    54 		}

    56 		private void FirstCharSearch(Char value)

    57 		{

    58 			if (value == ' ')

    59 				return;

    61 			_searchString = value.ToString();

    62 			TreeNodeAdv node = null;

    63 			if (_tree.SelectedNode != null)

    64 				node = _tree.SelectedNode.NextVisibleNode;

    65 			if (node == null)

    66 				node = _tree.Root.NextVisibleNode;

    68 			if (node != null)

    69 				foreach (string label in IterateNodeLabels(node))

    70 				{

    71 					if (label.StartsWith(_searchString))

    72 					{

    73 						_tree.SelectedNode = _currentNode;

    74 						return;

    75 					}

    76 				}

    77 		}

    79 		public virtual void EndSearch()

    80 		{

    81 			_currentNode = null;

    82 			_searchString = "";

    83 		}

    85 		protected IEnumerable<string> IterateNodeLabels(TreeNodeAdv start)

    86 		{

    87 			_currentNode = start;

    88 			while(_currentNode != null)

    89 			{

    90 				foreach (string label in GetNodeLabels(_currentNode))

    91 					yield return label;

    93 				_currentNode = _currentNode.NextVisibleNode;

    94 				if (_currentNode == null)

    95 					_currentNode = _tree.Root;

    97 				if (start == _currentNode)

    98 					break;

    99 			}

   100 		}

   102 		private IEnumerable<string> GetNodeLabels(TreeNodeAdv node)

   103 		{

   104 			foreach (NodeControl nc in _tree.NodeControls)

   105 			{

   106 				BindableControl bc = nc as BindableControl;

   107 				if (bc != null && bc.IncrementalSearchEnabled)

   108 				{

   109 					object obj = bc.GetValue(node);

   110 					if (obj != null)

   111 						yield return obj.ToString().ToLowerInvariant();

   112 				}

   113 			}

   114 		}

   116 		private bool DoContinuousSearch()

   117 		{

   118 			bool found = false;

   119 			if (!String.IsNullOrEmpty(_searchString))

   120 			{

   121 				TreeNodeAdv node = null;

   122 				if (_tree.SelectedNode != null)

   123 					node = _tree.SelectedNode;

   124 				if (node == null)

   125 					node = _tree.Root.NextVisibleNode;

   127 				if (!String.IsNullOrEmpty(_searchString))

   128 				{

   129 					foreach (string label in IterateNodeLabels(node))

   130 					{

   131 						if (label.StartsWith(_searchString))

   132 						{

   133 							found = true;

   134 							_tree.SelectedNode = _currentNode;

   135 							break;

   136 						}

   137 					}

   138 				}

   139 			}

   140 			return found;

   141 		}

   143 	}

   144 }

author	sl
	Thu, 01 Jan 2015 23:35:49 +0100
changeset 405	5715aefd2bcc
permissions	-rw-r--r--