When will a judge determine whether a defendant charged with crime is indigent?

As said in Williams v. Superior court (1964) 226 Cal.App.2d 666, 672, 38 Cal.Rptr. 291, the question of whether or not a person charged with crime is in a position to hire an attorney "is frequently a complex one." The court further said in considering whether persons charged with crime are indigent, "Obviously, this situation is one which should be handled by the judges who have charge of the courts where preliminary examinations and trials are held. Trial judges are in the best possible position administratively to decide the question involved, because the facts involved in each case must determine the answer." (p. 672, 38 Cal.Rptr. p. 294.)