public void UpdateTotal()
{
// Defaults
total = is_value ? value : 0;
valid_state = true;
if (script_digit_upper != null)
{
Operator upper_op = script_digit_upper.GetOperator();
if (script_digit_upper.GetIsValue() && !is_value)
{
// Above block is value and current block is operator, transfer total
valid_op = true;
total = script_digit_upper.GetTotal();
}
else if (!script_digit_upper.GetIsValue() && is_value && upper_op != Operator.invalid)
{
// Above block is operator and current block is value, perform operation and calculate new total
total = ApplyOperation(upper_op, script_digit_upper.GetTotal(), value);
}
else // Invalid placement
{
valid_state = false;
script_digit_upper.SetValidState(false);
script_digit_upper.UpdateColor();
UpdateColor();
return;
}
}
// Update lower block's total if exists
if (script_digit_lower != null)
{
script_digit_lower.UpdateTotal();
}
UpdateColor();
}
