/// <summary>
/// Calculates result of inputted expression.
/// </summary>
private void CalculateResult(object sender, RoutedEventArgs e)
{
if (operationExecutor.State == ExecutorState.Error)
{
return;
}
if (operationExecutor.State == ExecutorState.FirstOperandInput)
{
operationExecutor.FirstOperand = inputValidator.getInput();
}
else
{
operationExecutor.SecondOperand = inputValidator.getInput();
}
double?result = operationExecutor.Calculate();
if (operationExecutor.State == ExecutorState.ResultCalculated)
{
SetMainOutput(outputFormatter.MakeResult(result.Value));
SetSecondaryOutput(outputFormatter.MakeTempExpression(operationExecutor.FirstOperand,
operationExecutor.SecondOperand,
operationExecutor.Operator));
}
else if (operationExecutor.State == ExecutorState.Error)
{
SetMainOutput(outputFormatter.PrintError());
SetSecondaryOutput("");
}
operationExecutor.FirstOperand = result;
}