/// <summary>
/// Sets operator depending on pressed button.
/// </summary>
private void SetOperation(object sender, RoutedEventArgs e)
{
string buttonText = (sender as Button).Content.ToString();
OperatorType operation = InputValidator.ConvertToOperatorType(buttonText);
if (operationExecutor.State == ExecutorState.Error)
{
return;
}
if (operationExecutor.State == ExecutorState.SecondOperandInput)
{
CalculateResult(sender, e);
}
if (operationExecutor.State == ExecutorState.FirstOperandInput)
{
operationExecutor.FirstOperand = inputValidator.getInput();
}
if (operationExecutor.State == ExecutorState.ResultCalculated)
{
operationExecutor.SecondOperand = null;
operationExecutor.State = ExecutorState.OperatorGot;
}
operationExecutor.Operator = operation;
if (operation == OperatorType.Inversion || operation == OperatorType.SquareRoot)
{
CalculateResult(sender, e);
return;
}
SetSecondaryOutput(outputFormatter.MakeTempExpression(operationExecutor.FirstOperand,
operationExecutor.SecondOperand,
operationExecutor.Operator));
}
