private void DeregisterStart()
{
if (start != null)
{
start.Start.BackColor = Color.Khaki;
}
start = null;
}
private void DeregisterEnd()
{
if (end != null)
{
end.End.BackColor = Color.Khaki;
}
end = null;
}
public void RegisterEnd(TreeNodeControl c)
{
DeregisterEnd();
if (start == c)
{
return;
}
c.End.BackColor = Color.Red;
end = c;
if (start != null)
{
CreateEdge();
DeregisterStart();
DeregisterEnd();
start = end = null;
}
}