/*Allows the user to add a vertex to to the bst*/
public void add(int data)
{
if (root == null)
{
root = new BinaryNode(data);
root.setPositionX(1000);
root.setPositionY(80);
mainRoot = root;
graphNode(root.getPositionX(), root.getPositionY(), data, 0);
}
else
{
if (search(data) != null)
{
txtTitle.Text = ("No duplicate vertex allowed!");
}
else
{
add(data, root);
}
}
}