public void SetExpression(string key, string value, Calculator calc)
{
m_key = key;
m_expression = value;
if (calc != null)
{
m_tree = ExpressionTreeNode.Parse(m_expression, calc);
}
m_bufferSet = false;
//Find variable on forehand to make calculation faster.
int propIndex = m_key.LastIndexOf(Calculator.PROPERTY_CHAR);
string varName;
if (propIndex != -1)
{
varName = m_key.Substring(0, propIndex);
}
else
{
varName = m_key;
}
if (calc != null)
{
m_variable = calc.Variable(varName);
if (m_variable == null)
throw new System.Exception("Invalid variable key: " + key);
}
m_propName = m_key.Substring(propIndex + 1);
}
