public LinjeModel(LinjeViewModel lvm, NodModelBase n1, NodModelBase n2)
{
LinjeViewModel = lvm;
Nod1 = n1;
Nod2 = n2;
SetOnPropertyChanged();
}
private void Line_MouseDown(object sender, MouseButtonEventArgs e)
{
Line line = sender as Line;
LinjeViewModel l = line.DataContext as LinjeViewModel;
l.Split(e.GetPosition(this));
e.Handled = true;
}