public mypoint dpoint(float x, float y)
{
mypoint p = new mypoint();
p.xcord = x;
p.ycord = y;
p.p_color = Color.Black;
return(p);
}
public void Form1_MouseClick(object sender, MouseEventArgs e)
{
void delete(mypoint p)
{
this.coordinates.Remove(p);
this.Invalidate();
}
if (e.Button == MouseButtons.Left)
{
mypoint p = dpoint(e.X, e.Y);
this.coordinates.Add(p);
this.Invalidate();
}
if (e.Button == MouseButtons.Right)
{
float x = e.X;
float y = e.Y;
List <mypoint> temp = new List <mypoint>();
foreach (mypoint p in this.coordinates)
{
try
{
if (x > p.xcord - 20 && x < p.xcord + 20 && y > p.ycord - 20 && y < p.ycord + 20 && p.p_color == Color.Black)
{
p.p_color = Color.Red;
}
else if (x > p.xcord - 20 && x < p.xcord + 20 && y > p.ycord - 20 && y < p.ycord + 20 && p.p_color == Color.Red)
{
temp.Add(p);
}
}
catch (System.InvalidOperationException)
{
temp.Add(p);
}
}
foreach (mypoint p in temp)
{
this.coordinates.Remove(p);
}
}
this.Invalidate();
}