private void node_Down(object sender, MouseEventArgs e)
{
if (canDraw)
{
node1 = (RoundButton)sender;
}
}
private void panel1_Click(object sender, EventArgs e)
{
if (canDraw)
{
nrNodes++;
Point newLocation = new Point(clickX - sizeOfNode / 2, clickY - sizeOfNode / 2);
string nameNode = string.Format("node{0}", nrNodes);
nodes[nrNodes] = new RoundButton
{
Location = newLocation,
Name = string.Format(nameNode),
Text = nrNodes.ToString(),
Size = new Size(sizeOfNode, sizeOfNode),
FlatStyle = FlatStyle.Flat,
BackColor = Color.FromName("Aqua")
};
nodes[nrNodes].MouseDown += new MouseEventHandler(node_Down);
nodes[nrNodes].MouseUp += new MouseEventHandler(node_Up);
panel1.Controls.Add(nodes[nrNodes]);
Console.WriteLine("Node Location: " + newLocation);
}
}
public edge(RoundButton node1, RoundButton node2, int newWeight) : this()
{
this.firstNode = node1;
this.secondNode = node2;
this.weight = newWeight;
}
private void node_Up(object sender, MouseEventArgs e)
{
if (canDraw)
{
Point upLocation = e.Location;
upLocation.X += node1.Location.X;
upLocation.Y += node1.Location.Y;
//check if you released mouseBtn inside an existing node
for (int i = 1; i <= nrNodes; ++i)
{
int trX = nodes[i].Location.X;
int trY = nodes[i].Location.Y;
Rectangle currNode = new Rectangle(trX, trY, sizeOfNode, sizeOfNode);
if (currNode.Contains(upLocation))
{
node2 = nodes[i];
break;
}
}
//if you released mouseBtn inside an existing node2, different from node1
if (node2 != null && node2 != node1)
{
//check if an edge between node1 and node2 already exists
bool gtg = true;
for (int i = 0; i < edges.Count; i++)
{
if ((edges[i].firstNode == node1 && edges[i].secondNode == node2) ||
(edges[i].firstNode == node2 && edges[i].secondNode == node1))
{
gtg = false;
}
}
//if an edge between node1 and node2 doesn't already exist
if (gtg)
{
//generate an edge with a random weight
Random rnd = new Random();
int newWeight = rnd.Next(1, 100);
edge newEdge = new edge(node1, node2, newWeight);
//memorize the edge
edges.Add(newEdge);
//draw an edge between node1 and node2
DrawEdge(newEdge, Color.Black);
//update Form Edges with the newEdge
frmEdges.AddRow(newEdge);
}
}
//else, if you released mouseBtn in an empty space of the Drawing Area
else if (panel1.Bounds.Contains(upLocation.X + panel1.Bounds.X, upLocation.Y + panel1.Bounds.Y))
{
//move node1 to the new location
node1.Location = new Point(upLocation.X - sizeOfNode / 2, upLocation.Y - sizeOfNode / 2);
//and redraw the edges
redrawEdges(Color.WhiteSmoke);
}
//reset node1 and node2 to null
node1 = node2 = null;
}
}