public void Accept(iPhoneVisitor visitor)
{
if (visitor != null)
{
visitor.Visit(this);
}
}
private void btnVisit_Click(object sender, EventArgs e)
{
iPhoneElement element = (iPhoneElement)lbElements.SelectedItem;
iPhoneVisitor visitor = (iPhoneVisitor)lbVisitors.SelectedItem;
if (visitor == null || element == null)
{
MessageBox.Show("please select a visitor and element");
return;
}
element.Accept(visitor);
}
