PROMS/Volian.Controls.Library/vlnTreeView3.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Text;
+using System.Windows.Forms;
+using VEPROMS.CSLA.Library;
+
+namespace Volian.Controls.Library
+{
+	//public delegate void vlnTreeViewEvent(object sender, vlnTreeEventArgs args);
+	//public delegate bool vlnTreeViewBoolEvent(object sender, vlnTreeEventArgs args);
+	//public delegate TreeNode vlnTreeViewTreeNodeEvent(object sender, vlnTreeEventArgs args);
+	//public delegate void vlnTreeViewDDEvent(object sender, System.Windows.Forms.DragEventArgs args);
+	public partial class vlnTreeView3 : TreeView
+	{
+		private static readonly log4net.ILog _MyLog = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
+		#region Events
+		public event vlnTreeViewEvent NodeSelectionChange;
+		private void OnNodeSelectionChange(object sender, vlnTreeEventArgs args)
+		{
+			if (NodeSelectionChange != null) NodeSelectionChange(sender, args);
+		}
+		#endregion
+		#region Business Methods
+		#endregion
+		#region Constructors
+		public vlnTreeView3()
+		{
+			InitializeComponent();
+			base.AfterSelect += new TreeViewEventHandler(tv_AfterSelect);
+		}
+		private void tv_AfterSelect(object sender, TreeViewEventArgs e)
+		{
+			OnNodeSelectionChange(sender, new vlnTreeEventArgs(e.Node));
+		}
+		#endregion
+		private static TreeNode GetTreeNodeFromData(IDataObject datobj)
+		{
+			foreach (string s in datobj.GetFormats())
+			{
+				try
+				{
+					return (TreeNode)datobj.GetData(s);
+				}
+				catch (Exception ex)
+				{
+					if (_MyLog.IsErrorEnabled) _MyLog.Error("GetTreeNodeFromData", ex);
+				}
+			}
+			return null;
+		}
+		private TreeNode Clone(TreeNode tn)
+		{
+
+			TreeNode tmp = (TreeNode)tn.Clone();
+			ExpandMatch(tmp, tn);
+			return tmp;
+		}
+		private void ExpandMatch(TreeNode tn1, TreeNode tn2)
+		{
+			if (tn2.IsExpanded) tn1.Expand();
+			foreach (TreeNode tc in tn2.Nodes) ExpandMatch(tn1.Nodes[tc.Index], tc);
+		}
+		private bool IsChild(TreeNode parent, TreeNode child)
+		{
+			if (parent.Equals(child)) return true;// Check against self
+			foreach (TreeNode tc in parent.Nodes) if (IsChild(tc, child)) return true;//Check all children
+			return false;// Must not be a child at this level
+		}
+	}
+}