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using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
namespace ABS.TreeNodeNavigator
{
#region DISCLAIMER
/* THE CLASS IS PROVIDED "AS IS". ANY ECONOMIC (OR OTHERWISE)
/* LOSS/DAMAGE INCURRED DIRECTLY OR INDIRECTLY BECAUSE OF THIS
/* CLASS IS TO BE BEARED BY THE USER. THE AUTHOR IS IN NO WAY
/* RESPONSIBLE FOR ANY SUCH LOSS/DAMAGE.*/
#endregion
#region class 'Navigator'
public sealed class Navigator
{
#region CLASS DESCRIPTION
/*
Name of class : ABS.TreeNodeNavigator.Navigator
Purpose : To navigate Treeview nodes across the tree hierarchy.
Class Variables : transactionStatus enum, db oracleDatabase
Fucntions : MoveUp()
MoveDown()
MoveRight()
MoveLeft()
Dependencies : System.Windows.Forms
Author : Siddhartha Sarkar
Creation Date : 1 August 2008
Version : Draft
Modification Hist :
Modified By Modified Date Description(Modified/Added Function Name)
*/
#endregion
#region"User defined variable"
private TreeNode trevViewNode = null;
private TreeView trvParent = null;
#endregion
#region "Property"
public TreeNode TreeViewNode
{
get
{
return trevViewNode;
}
set
{
trevViewNode = value;
if (trevViewNode.TreeView == null)
throw new Exception("The tree node that has been assigned does not belong to a treeview.\n" +
"Please assign the node to a treeview then assign it to the property of the navigator class.");
else
trvParent = trevViewNode.TreeView;
}
}
#endregion
#region "Function to Move a node of the treeview Up"
/// <summary>
/// Function to Move a node of the treevie to the left
/// </summary>
public void MoveUp()
{
try
{
if (trevViewNode == null)
throw new NullReferenceException("The Property 'TreeViewNode' hasn't been assigned. Please assing the treeview you want to operate on.");
else
{
if (trevViewNode.Index != 0 )
{
if (trevViewNode.Level > 0)
{
int index = trevViewNode.Index;
TreeNode parent = trevViewNode.Parent;
//assign
TreeNode[] tempNode = new TreeNode[] { (TreeNode)trevViewNode.PrevNode.Clone(), (TreeNode)trevViewNode.Clone() };
//remove
parent.Nodes.RemoveAt(trevViewNode.Index - 1);
parent.Nodes.RemoveAt(trevViewNode.Index);
//insert
parent.Nodes.Insert(index - 1, tempNode[1]);
parent.Nodes.Insert(index, tempNode[0]);
//select the node
trvParent.SelectedNode = tempNode[1];
}
else
{
int index = trevViewNode.Index;
//assign
TreeNode[] tempNode = new TreeNode[] { (TreeNode)trevViewNode.PrevNode.Clone(), (TreeNode)trevViewNode.Clone() };
//remove
trvParent.Nodes.RemoveAt(trevViewNode.Index - 1);
trvParent.Nodes.RemoveAt(trevViewNode.Index);
//insert
trvParent.Nodes.Insert(index - 1, tempNode[1]);
trvParent.Nodes.Insert(index, tempNode[0]);
//select the node
trvParent.SelectedNode = tempNode[1];
}
}
}
}
catch (NullReferenceException ex)
{
throw new Exception(ex.Message);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
#endregion
#region "Function to move a node of the treeview Right"
public void MoveRight()
{
try
{
if (trevViewNode == null)
throw new NullReferenceException("The Property 'TreeViewNode' hasn't been assigned. Please assing the treeview you want to operate on.");
else
{
if (trevViewNode.Index != 0)
{
if (trevViewNode.Parent != null)
{
int index = trevViewNode.Index;
TreeNode parent = trevViewNode.Parent;
TreeNode tempNode = (TreeNode)trevViewNode.Clone();
parent.Nodes[index - 1].Nodes.Add(tempNode);
trevViewNode.Remove();
//select the node
trvParent.SelectedNode = tempNode;
}
else
{
int index = trevViewNode.Index;
TreeView parent = trevViewNode.TreeView;
TreeNode tempNode = (TreeNode)trevViewNode.Clone();
trvParent.Nodes[index - 1].Nodes.Add(tempNode);
trevViewNode.Remove();
//select the node
trvParent.SelectedNode = tempNode;
}
}
}
}
catch (NullReferenceException ex)
{
throw new Exception(ex.Message);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
#endregion
#region "Function to move a node of the treeview Down"
public void MoveDown()
{
try
{
if (trevViewNode == null)
throw new NullReferenceException("The Property 'TreeViewNode' hasn't been assigned. Please assing the treeview you want to operate on.");
else
{
if (trevViewNode.NextNode != null)
{
if (trevViewNode.Level >= 1)
{
int index = trevViewNode.Index;
TreeNode parent = trevViewNode.Parent;
//assign
TreeNode[] tempNode = new TreeNode[] { (TreeNode)trevViewNode.Clone(), (TreeNode)trevViewNode.NextNode.Clone() };
//remove
trevViewNode.NextNode.Remove();
trevViewNode.Remove();
//insert
parent.Nodes.Insert(index, tempNode[1]);
parent.Nodes.Insert(index + 1, tempNode[0]);
//select the node required
trvParent.SelectedNode = tempNode[0];
}
else
{
int index = trevViewNode.Index;
//assign
TreeNode[] tempNode = new TreeNode[] { (TreeNode)trevViewNode.Clone(), (TreeNode)trevViewNode.NextNode.Clone() };
//remove
trevViewNode.NextNode.Remove();
trevViewNode.Remove();
//insert
trvParent.Nodes.Insert(index, tempNode[1]);
trvParent.Nodes.Insert(index + 1, tempNode[0]);
//select the node required
trvParent.SelectedNode = tempNode[0];
}
}
}
}
catch (NullReferenceException ex)
{
throw new Exception(ex.Message);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
#endregion
#region "Function to move a node of the treeview Left"
public void MoveLeft()
{
try
{
if (trevViewNode == null)
throw new NullReferenceException("The Property 'TreeViewNode' hasn't been assigned. Please assing the treeview you want to operate on.");
else
{
if (trevViewNode.Level >= 2)
{
TreeNode tempNode = (TreeNode)trevViewNode.Clone();
if (trevViewNode.Parent.NextNode != null)
trevViewNode.Parent.Parent.Nodes.Insert(trevViewNode.Parent.NextNode.Index, tempNode);
else
trevViewNode.Parent.Parent.Nodes.Add(tempNode);
trevViewNode.Remove();
//select the required node
trvParent.SelectedNode = tempNode;
}
else if (trevViewNode.Level == 1)
{
TreeNode tempNode = (TreeNode)trevViewNode.Clone();
if (trevViewNode.Parent.NextNode != null)
trevViewNode.TreeView.Nodes.Insert(trevViewNode.Parent.NextNode.Index, tempNode);
else
trevViewNode.TreeView.Nodes.Add(tempNode);
trevViewNode.Remove();
//select the node
trvParent.SelectedNode = tempNode;
}
//for level 0 nodes, no left movement.
}
}
catch (NullReferenceException ex)
{
throw new Exception(ex.Message);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
#endregion
}
#endregion
}
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Sid loves programming and has technical experience developing desktop based solutions using C#.Net, Winforms, WPF.
He has experience of Software services, I-Banks and Product development environments.
He also has a deep understanding of Product Development Lifecycle and Agile methodology of developing softwares.
Besides programming he is also fond of music, photography and cooking.
He lives in Bangalore.
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