public void Handle(NodeUpdate message)
{
Draw();
//System.Threading.Thread.Sleep(10);
if (message.From != null)
{
var actualNode = MyNodes.FirstOrDefault(x => x.Id == message.NodeId);
actualNode.Height += 5;
actualNode.Width += 5;
var nodeFrom = MyNodes.FirstOrDefault(x => x.Name == Convert.ToString(message.From.Value));
var nodeTo = MyNodes.FirstOrDefault(x => x.Name == Convert.ToString(message.NodeId));
LineModel line = new LineModel
{
Stroke = Brushes.Gray,
X1 = nodeFrom.X + (nodeFrom.Width / 2),
Y1 = nodeFrom.Y + (nodeFrom.Height / 2),
X2 = nodeTo.X + (nodeTo.Width / 2),
Y2 = nodeTo.Y + (nodeTo.Height / 2),
StrokeThickness = 3
};
path.Add(line);
MyLines.Add(line);
}
}
///////////////////////////////////////////////////////////////////////
// Internal Events
///////////////////////////////////////////////////////////////////////
private void AccountTLV_AfterSelect(object sender, TreeViewEventArgs e)
{
int accountID = -1;
int envelopeID = -1;
MyNodes nodeType = (this.accTLV.FocusedNode as BaseNode).NodeType;
switch (nodeType)
{
case MyNodes.AENode:
AENode aeNode = this.accTLV.FocusedNode as AENode;
accountID = aeNode.AccountID;
envelopeID = aeNode.EnvelopeID;
break;
case MyNodes.Account:
accountID = (this.accTLV.FocusedNode as AccountNode).AccountID;
break;
case MyNodes.Envelope:
envelopeID = (this.accTLV.FocusedNode as EnvelopeNode).EnvelopeID;
break;
case MyNodes.Root:
case MyNodes.AccountType:
case MyNodes.EnvelopeGroup:
break;
}
if (accountID != selectedAccountID || envelopeID != selectedEnvelopeID)
{
OnSelectedAccountEnvelopeChanged(new SelectedAccountEnvelopeChangedEventArgs(accountID, envelopeID));
}
}
/// <summary>
/// Function to set the key value pair in HashTable
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
public void set(string key, int value)
{
//Setting index value to hash function
int index = hash(key);
//If hash function is empty (nothing stored)
if (data[index] == null)
{
//Create a new key value node
data[index] = new MyNodes();
}
//Else, add Node to hash table at hash function index
data[index].Add(new MyNode(key, value));
}
public AddForm(MyNodes select = null)
{
InitializeComponent();
if (select != null)
{
newUser = select;
tb_name.Text = select.Text;
tb_email.Text = select.Email;
}
else
{
newUser = new MyNodes();
}
}
//O(1)
public object Get(string key)
{
int address = _hash(key);
MyNodes currentBucket = this.data[address];
if (currentBucket != null)
{
foreach (var node in currentBucket)
{
if (node.key == key)
{
return(node.value);
}
}
}
return(0);
}
private void AccountTLV_NotifyBeforeExpand(Node node, bool isExpanding)
{
if (!isExpanding || node.Nodes.Count > 0)
{
return;
}
MyNodes nodeType = (node as BaseNode).NodeType;
switch (nodeType)
{
case MyNodes.Root:
this.handleThisRootNode(node as RootNode);
break;
case MyNodes.AccountType:
this.handleThisTypeNode(node as TypeNode);
break;
case MyNodes.EnvelopeGroup:
this.handleThisGroupNode(node as GroupNode);
break;
case MyNodes.Account:
this.handleThisAccountNode(node as AccountNode);
break;
case MyNodes.Envelope:
this.handleThisEnvelopeNode(node as EnvelopeNode);
break;
}
if (node.Nodes.Count > 0)
{
node.HasChildren = true;
}
else
{
node.HasChildren = false;
}
}
private void OpenFile(object parameter)
{
OpenFileDialog opd = new OpenFileDialog();
opd.Filter = "XML File *.xml|*.xml";
try
{
if (opd.ShowDialog() == true)
{
XmlDocument xDoc = MLHelper.GetMLDocument(opd.FileName);
MLNode retNode = MLHelper.ParserML(xDoc.DocumentElement);
MyNodes.Add(retNode);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Parser Error!");
}
}
/////////////////////////////////////////////////////////////////// Algorithm Implementation Function /////////////////////////////////////////////////////////////////
private void BellmanFordAlgo(Graph graph, MyNodes sourceNode) // takes in a graph reference and a source node reference as argument
{
Dictionary <MyNodes, NodeValue> Distance = new Dictionary <MyNodes, NodeValue>(); // creates a dictionary of nodes as keys and nodevalues as values
for (int i = 0; i < graph.Nodelist.Count; i++)
{
NodeValue nodeValue = new NodeValue(graph.Nodelist[i], float.MaxValue); // creates node value with the cost of all nodes to max value and all prev nodes for that node as the node itself
Distance.Add(graph.Nodelist[i], nodeValue); // adds the node value to the dictionary.
}
Distance[sourceNode].Cost = 0; // changes the cost of the source node to 0;
for (int i = 0; i < graph.Nodelist.Count; i++) // for each vertice.
{
for (int j = 0; j < graph.Edgelist.Count; j++) // traverses each edge in the list
{
MyNodes startNode = graph.Edgelist[j].A;
MyNodes endtNode = graph.Edgelist[j].B;
float w = graph.Edgelist[j].weight;
if (Distance[startNode].Cost != float.MaxValue && ((Distance[startNode].Cost + w) < Distance[endtNode].Cost)) // checks if the edge originates from a source node and if the cost of destination node is higher than the cost of movement from source node
{
Distance[endtNode].Cost = Distance[startNode].Cost + w; // updates the cost if its higher than the traversal cost
Distance[endtNode].prevNode = startNode; // updates the previous node of the destination node as the source node of the edge.
}
}
}
//foreach (KeyValuePair<MyNodes, NodeValue> pair in Distance)
//{
// Debug.Log("Coordinates: " + pair.Key.x + "," + pair.Key.y + "Cost: " + pair.Value.Cost);
//}
path = new Stack <MyNodes>(); // creates a stack for the path.
path.Push(Destination); // pushes the destination node as the first input.
while (Distance[path.Peek()].prevNode.ID != sourceNode.ID) // while the previous node is not the source node of the 1st node in stack
{
path.Push(Distance[path.Peek()].prevNode); // pushes in the previous node.
}
ShowPath = true; // gives the green light to start showing the path.
}
protected BaseNode(MyNodes nodeType, String name)
: base(name)
{
this.NodeType = nodeType;
}
//////////////////////////////////////////////////////////// User Input Functions //////////////////////////////////////////////////////////////////////////
void Update()
{
if (Input.GetKeyDown(KeyCode.Alpha1)) // these three modes let you choose what type of setting you wish to make for the grid
{
Debug.Log("Add Wall");
wallMode = true;
endMode = false;
startMode = false;
}
if (Input.GetKeyDown(KeyCode.Alpha2))
{
Debug.Log("Set source node");
wallMode = false;
endMode = false;
startMode = true;
}
if (Input.GetKeyDown(KeyCode.Alpha3))
{
Debug.Log("Set end node");
wallMode = false;
endMode = true;
startMode = false;
}
if (Input.GetMouseButtonDown(0) && wallMode)
{
x = (Input.mousePosition.x - Input.mousePosition.x % 50) / 50; //deciphers the coordinates on the grid where we click
y = (Input.mousePosition.y - Input.mousePosition.y % 50) / 50;
//Debug.Log(x + " " + y);
GameObject gO = Instantiate(buttonPrefab, GameObject.Find("Canvas").GetComponent <Transform>().Find("Buttons").GetComponent <Transform>()) as GameObject; // creates a button object on the grid to show a wall
gO.transform.position = Cm.ViewportToScreenPoint(new Vector3((x / 16) + 1 / 32f, (y / 12) + 1 / 24f, 0)); // places the object at the correct grid
foreach (MyNodes node in graph.Nodelist)
{
if (node.x == x && node.y == y)
{
if (!(notToUse.Contains(node.ID))) // checks which node has these coordinates and adds its ID to a list.
{
notToUse.Add(node.ID);
}
//graph.Nodelist.Remove(node); // attempts to remove that node from the list
// node.setUsability(0); // attempts to set usabilty as non usable
//Debug.Log("Unusable Node: " + node.x + "," + node.y + "-usability(" + node.isUsable + ")");
}
}
}
if (Input.GetMouseButtonDown(0) && endMode && !endpointExists) // while endmode is on, alllows you to set the destination only once
{
x = (Input.mousePosition.x - Input.mousePosition.x % 50) / 50; // this bit works the same as the wallmode except the prefab is different
y = (Input.mousePosition.y - Input.mousePosition.y % 50) / 50;
GameObject gO = Instantiate(endPrefab, GameObject.Find("Canvas").GetComponent <Transform>().Find("Buttons").GetComponent <Transform>()) as GameObject;
gO.transform.position = Cm.ViewportToScreenPoint(new Vector3((x / 16) + 1 / 32f, (y / 12) + 1 / 24f, 0));
endpointExists = true;
foreach (MyNodes node in graph.Nodelist)
{
if ((x == node.x) && (y == node.y))
{
Destination = node; // stores the reference to the node chosen to be the destination
Debug.Log("Destination Node Coordinates : " + Destination.x + "," + Destination.y);
}
}
}
if (Input.GetMouseButtonDown(0) && startMode && !startPointExists) // allows the setting of initial point
{
x = (Input.mousePosition.x - Input.mousePosition.x % 50) / 50; // this also works the same as the wall mode with different prefab
y = (Input.mousePosition.y - Input.mousePosition.y % 50) / 50;
GameObject gO = Instantiate(objectPrefab, GameObject.Find("Canvas").GetComponent <Transform>().Find("Buttons").GetComponent <Transform>()) as GameObject;
gO.transform.position = Cm.ViewportToScreenPoint(new Vector3((x / 16) + 1 / 32f, (y / 12) + 1 / 24f, 0));
startPointExists = true;
foreach (MyNodes node in graph.Nodelist)
{
if ((x == node.x) && (y == node.y))
{
Source = node; // stores the reference to the node chosen to be the source.
Debug.Log("Start Node Coordinates : " + Source.x + "," + Source.y);
}
}
}
if (Input.GetKeyDown(KeyCode.Space)) // initiates the creation of edges and applies the path finding algorithm function after that
{
//foreach (MyNodes node in graph.Nodelist)
//{
// Debug.Log("ID: " + node.ID + ", Coordinates: " +node.x + "," + node.y + " , Usability: " + node.isUsable);
//}
//foreach(int i in notToUse)
//{
// Debug.Log(i);
//}
CreateEdges();
BellmanFordAlgo(graph, Source);
}
}
public NodeValue(MyNodes prevnode, float cost)
{
prevNode = prevnode;
Cost = cost;
}
public MyEdges(MyNodes a, MyNodes b, float w)
{
weight = w;
A = a;
B = b;
}
public void Execute(int index)
{
ID = I * 12 + index;
NodeList[index] = new MyNodes(I, index, ID);
}