private void BtnNums_On_Click(object sender, RoutedEventArgs e)
{
Button button = e.Source as Button;
if (button != null)
{
if (button.Content.ToString() == ".")
{
if (!IsCalcInResetState && !ResultShowingInCalcInput && !BasicHelper.InputHasDecimal(CalcInput.Text))
{
CalcInput.Text += button.Content;
}
else if (IsCalcInResetState || ResultShowingInCalcInput)
{
CalcDisplay.Text = "";
CalcInput.Text = "0" + button.Content;
}
}
else
{
if (ResultShowingInCalcInput)
{
CalcInput.Text = "";
}
if (IsCalcInResetState)
{
CalcDisplay.Text = "";
if (button.Content.ToString() != "!")
{
CalcInput.Text = "";
}
}
var buttonContent = button.Content.ToString();
if (buttonContent == "0")
{
if (BasicHelper.ValidateInputOfZero(CalcInput.Text))
{
CalcInput.Text += button.Content;
}
}
else if (buttonContent == "√")
{
if (!InputHasRoot && !InputHasFactorial && BasicHelper.ValidateSqrtInput(CalcInput.Text))
{
CalcInput.Text += button.Content;
}
}
else if (buttonContent == "!")
{
if (!InputHasFactorial && !InputHasRoot && !BasicHelper.InputHasDecimal(CalcInput.Text))
{
if (BasicHelper.CheckIfANumberExistsBefore(CalcInput.Text))
{
CalcInput.Text += button.Content;
}
}
}
else
{
CalcInput.Text += button.Content;
}
}
if (CalcInput.Text.Contains("√"))
{
InputHasRoot = true;
}
if (CalcInput.Text.Contains("!"))
{
InputHasFactorial = true;
}
if (Operator == "^" && CalcInput.Text != "")
{
OperatorAllowed = false;
if (Char.IsDigit(CalcInput.Text[CalcInput.Text.Length - 1]) || CalcInput.Text[CalcInput.Text.Length - 1] == '!')
{
OnlyEqualSignAllowed = true;
}
}
else if (Operator == "^-" && CalcInput.Text != "")
{
OperatorAllowed = false;
if (Char.IsDigit(CalcInput.Text[CalcInput.Text.Length - 1]) || CalcInput.Text[CalcInput.Text.Length - 1] == '!')
{
OnlyEqualSignAllowed = true;
}
}
else if (Operator != "^-" && Operator != "^")
{
OperatorAllowed = true;
}
ResultShowingInCalcInput = false;
IsCalcInResetState = false;
}
}
