private void DrawEdge(GraphPoint PointA, GraphPoint PointB, int weight, Color color)
{
Graphics g = CreateGraphics();
Pen p = new Pen(color);
g.DrawLine(p, PointB.X + 10, PointB.Y + 10, PointA.X + 10, PointA.Y + 10);
//Label weight
if (weight != -1)
{
int xMid = Math.Abs((PointB.X + 10) - (PointA.X + 10)) / 2;
int yMid = Math.Abs((PointB.Y + 10) - (PointA.Y + 10)) / 2;
Point choosenPoint = new Point();
if (PointB.X > PointA.X)
{
choosenPoint.X = PointA.X + xMid - 5;
}
else
{
choosenPoint.X = PointB.X + xMid - 5;
}
if (PointB.Y > PointA.Y)
{
choosenPoint.Y = PointA.Y + yMid - 5;
}
else
{
choosenPoint.Y = PointB.Y + yMid - 5;
}
g.DrawString(weight.ToString(), new Font("Arial", 8), new SolidBrush(Color.Blue), choosenPoint);
}
}
private void DrawNumber(GraphPoint vertex)
{
Graphics g = Graphics.FromImage(vertex.Image);
g.DrawString(vertex.number.ToString(), new Font("Microsoft Sans Serif", 30), Brushes.Black,
new Point(80, 80));
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
i++;
GraphPoint vertex = new GraphPoint(e.X - 10, e.Y - 10, i);
MyGraph.AddVertex(vertex);
vertex.Click += new System.EventHandler(this.picturePoint_click); // += add to event
this.Controls.Add(vertex);
DrawNumber(vertex);
}
void picturePoint_click(object sender, EventArgs e)
{
var pic = sender as GraphPoint;
if (pic.status) //Unselect button
{
pic.Image = new Bitmap(@"img\button.png");
pic.status = false;
DrawNumber(pic);
}
else //Find out if another button was selected and is waiting for connection
{
GraphPoint buttonThatWasFinded = Graph.vertices.Find(x => x.status == true);
if (buttonThatWasFinded != null) //if YES then make connection
{
//Make edge
//Random weight
Random rand = new Random();
int weight = rand.Next(1, 100);
//Draw Edge and lable weight
DrawEdge(pic, buttonThatWasFinded, weight, Color.Black);
//set default status
buttonThatWasFinded.status = false;
pic.status = false;
buttonThatWasFinded.Image = new Bitmap(@"img\button.png");
//add edge in graph list
MyGraph.AddEdge(pic, buttonThatWasFinded, weight);
DrawNumber(pic);
DrawNumber(buttonThatWasFinded);
}
else //if NO then denote this button as selected
{
pic.status = true;
pic.Image = new Bitmap(@"img\buttonPressed.png");
DrawNumber(pic);
}
}
}
