private void NumberPassing(string value)
{
if (state == StateOfCalc.OPERATIONSET)
{
state = StateOfCalc.SECTOSET;
InsertedValue = String.Empty;
}
else if (state == StateOfCalc.RESULT)
{
InsertedValue = String.Empty;
state = StateOfCalc.FIRSTTOSET;
}
if ("," == value)
{
if (InsertedValue.Contains(","))
{
return;
}
else if (InsertedValue == String.Empty)
{
InsertedValue = "0,";
return;
}
}
InsertedValue += value;
}
private void SetOperation(string obj)
{
switch (state)
{
case StateOfCalc.FIRSTTOSET:
if (InsertedValue != String.Empty)
{
number1 = ParsetoDouble(InsertedValue);
state = StateOfCalc.OPERATIONSET;
SetOperationOfCalc(obj);
}
break;
case StateOfCalc.OPERATIONSET:
SetOperationOfCalc(obj);
break;
case StateOfCalc.SECTOSET:
operation = Operation.NONE;
state = StateOfCalc.FIRSTTOSET;
break;
}
InsertedValue = String.Empty;
}
private void SetOperationOfCalc(string obj)
{
switch (obj)
{
case "+":
operation = Operation.ADD;
state = StateOfCalc.OPERATIONSET;
break;
case "-":
operation = Operation.SUB;
state = StateOfCalc.OPERATIONSET;
break;
case "*":
operation = Operation.MUL;
state = StateOfCalc.OPERATIONSET;
break;
case "/":
operation = Operation.DIV;
state = StateOfCalc.OPERATIONSET;
break;
case "C":
operation = Operation.NONE;
state = StateOfCalc.FIRSTTOSET;
break;
}
}
private void operationBtn_Click(object sender, EventArgs e)
{
Button btn = sender as Button;
switch (state)
{
case StateOfCalc.FIRSTTOSET:
if (InsertedValue != String.Empty)
{
number1 = ParsetoDouble(InsertedValue);
state = StateOfCalc.OPERATIONSET;
SetOperationOfCalc(btn.Text);
}
break;
case StateOfCalc.OPERATIONSET:
SetOperationOfCalc(btn.Text);
break;
case StateOfCalc.SECTOSET:
operation = Operation.NONE;
state = StateOfCalc.FIRSTTOSET;
break;
}
InsertedValue = String.Empty;
}
private void num_Click(object sender, EventArgs e)
{
Button btn = sender as Button;
if (state == StateOfCalc.OPERATIONSET)
{
state = StateOfCalc.SECTOSET;
InsertedValue = String.Empty;
}
else if (state == StateOfCalc.RESULT)
{
InsertedValue = String.Empty;
state = StateOfCalc.FIRSTTOSET;
}
if ("," == btn.Text)
{
if (InsertedValue.Contains(","))
{
return;
}
else if (InsertedValue == String.Empty)
{
InsertedValue = "0,";
return;
}
}
InsertedValue += btn.Text;
}
private void CalculateResult()
{
if (state == StateOfCalc.SECTOSET)
{
number2 = ParsetoDouble(InsertedValue);
try
{
switch (operation)
{
case Operation.ADD:
InsertedValue = calcEngine.Addition(number1, number2).Result.ToString();
break;
case Operation.SUB:
InsertedValue = calcEngine.Subtraction(number1, number2).Result.ToString();
break;
case Operation.MUL:
InsertedValue = calcEngine.Multiplication(number1, number2).Result.ToString();
break;
case Operation.DIV:
if (number2.Equals(0))
{
InsertedValue = "Can't div by ZERO";
return;
}
InsertedValue = calcEngine.Division(number1, number2).Result.ToString();
break;
}
state = StateOfCalc.RESULT;
}
catch (Exception e)
{
MessagingCenter.Send(new MessagingCenterAlert
{
Title = "Error",
Message = e.Message,
Cancel = "OK"
}, "message");
}
}
}
private void CalculateResult()
{
if (state == StateOfCalc.SECTOSET)
{
number2 = ParsetoDouble(InsertedValue);
try
{
switch (operation)
{
case Operation.ADD:
InsertedValue = calcEngine.Addition(number1, number2).Result.ToString();
break;
case Operation.SUB:
InsertedValue = calcEngine.Subtraction(number1, number2).Result.ToString();
break;
case Operation.MUL:
InsertedValue = calcEngine.Multiplication(number1, number2).Result.ToString();
break;
case Operation.DIV:
if (number2.Equals(0))
{
InsertedValue = "Can't div by ZERO";
return;
}
InsertedValue = calcEngine.Division(number1, number2).Result.ToString();
break;
}
state = StateOfCalc.RESULT;
}
catch (Exception e)
{
}
}
}
