/* Dodaje znak do dzialania */
public void AddSignToEquation(char Operator)
{
if (true == CurrentEquationState[CurrentEquationState.Length - 1].IsMathematicalOperator())
{
CurrentEquationState = CurrentEquationState.Remove(CurrentEquationState.Length - 1, 1);
}
CurrentEquationState += Operator;
ChangeWordButton(this, new MyEventArgs("false"));
UpdateDisplay(this, eUpdateArgs);
}
/* Usuwa ostatni wprowadzony znak */
public void DeleteLastSignInEquation()
{
if (CurrentEquationState != "0" && CurrentEquationState.Length > 1)
{
CurrentEquationState = CurrentEquationState.Remove(CurrentEquationState.Length - 1);
}
else if (CurrentEquationState != "0" && CurrentEquationState.Length == 1)
{
CurrentEquationState = "0";
}
if (false == CurrentEquationState.IsThereAnyMathematicalOperatorInString())
{
ChangeWordButton(this, new MyEventArgs("true"));
}
UpdateDisplay(this, eUpdateArgs);
}