private void HandleDigitCommand(DigitCommand digitCommand)
{
// Scenarios
// If accumulator has zero and digit is zero then ignore.
// If accumulator has zero and digit is non zero, then replace
// Else append
var cpu = this.Calculator.CPU;
if (cpu.Accumulator.ToString() == "0" && digitCommand.Digit == 0)
{
return;
}
if (cpu.Accumulator.ToString() == "0" && digitCommand.Digit != 0)
{
cpu.Accumulator.SetValue(digitCommand.Digit);
}
else
{
cpu.Accumulator.Append(digitCommand.Digit.ToString());
}
}
private void RaiseAllCanExecute()
{
DigitCommand.RaiseCanExecuteChanged();
ClearCommand.RaiseCanExecuteChanged();
SubmitCommand.RaiseCanExecuteChanged();
}