private void EquationButtonHandler(string expression)
{
if (!ValidateStr(mainDisplay) && !ValidateStr(secondNum))
{
if (expressionQueue == false)
{
secondNum = mainDisplay;
UpdateTextBoxes(firstNum, secondNum, expression);
}
else
{
string temp = expression;
expression = Equations.GetQueueExpression();
secondNum = mainDisplay;
UpdateTextBoxes(firstNum, secondNum, expression);
Equations.SetExpression(temp);
//expressionQueue = false;
}
}
else if (!ValidateStr(mainDisplay) && ValidateStr(secondNum))
{
firstNum = mainDisplay;
txtBox_History.Text = Equations.Builder(firstNum, expression);
if (ValidateStr(secondNum))
{
secondNum = mainDisplay;
}
mainDisplay = "";
Equations.SetExpression(expression);
expressionQueue = true;
}
else if (ValidateStr(mainDisplay))
{
Equations.SetExpression(expression);
expressionQueue = true;
}
//if (numSaved == false)
//{
// if (ValidateStr(firstNum)) firstNum = mainDisplay;
// txtBox_History.Text = Equations.Builder(firstNum, expression);
// numSaved = true;
// mainDisplay = "";
//}
//else
//{
// if (!ValidateStr(mainDisplay))
// {
// secondNum = mainDisplay;
// txtBox_History.Text = Equations.HistoryBuilder(firstNum, secondNum, expression);
// firstNum = txtBox_Equation.Text = Equations.Builder(firstNum, secondNum, expression);
// mainDisplay = "";
// }
//}
}
private void btn_Equals_Click(object sender, EventArgs e)
{
string lastExpression = expressionQueue == true?Equations.GetQueueExpression() : Equations.GetExpression();
if (!ValidateStr(firstNum) && ValidateStr(secondNum))
{
secondNum = mainDisplay;
}
if (ValidateStr(firstNum))
{
firstNum = mainDisplay;
}
if (!ValidateStr(firstNum) && !ValidateStr(secondNum) && !ValidateStr(lastExpression))
{
switch (lastExpression)
{
case "addition":
if (!ValidateStr(mainDisplay))
{
secondNum = mainDisplay;
}
UpdateTextBoxes(firstNum, secondNum, "addition");
break;
case "subtraction":
if (!ValidateStr(mainDisplay))
{
secondNum = mainDisplay;
}
UpdateTextBoxes(firstNum, secondNum, "subtraction");
break;
case "multiplication":
if (!ValidateStr(mainDisplay))
{
secondNum = mainDisplay;
}
UpdateTextBoxes(firstNum, secondNum, "multiplication");
break;
case "division":
if (!ValidateStr(mainDisplay))
{
secondNum = mainDisplay;
}
UpdateTextBoxes(firstNum, secondNum, "division");
break;
}
}
else if (!string.IsNullOrEmpty(firstNum) && string.IsNullOrEmpty(secondNum))
{
txtBox_History.Text = firstNum + " = ";
}
}