//Operator State
private void DigitPeriod_Button_MouseClick(object sender, MouseEventArgs e)
{
string input = DigitPeriod_Button.Text;
CalculatorState.getInstance().nextState(1, input);
textBox1.Text = CalculationState.getInstance().display();
}
protected void readOp(String input)
{
if (op == "")
{
op = input;
isOperand1Complete = true;
if (isCalculationComplete)
{
operand2 = "0";
isCalculationComplete = false;
isOperand2Complete = false;
}
}
else
{
if (!isCalculationComplete && isCalculationButtonPressed)
{
CalculatorState.getInstance().nextState(3, null);
}
op = input;
isOperand1Complete = true;
if (isCalculationComplete)
{
operand2 = "0";
isCalculationComplete = false;
isOperand2Complete = false;
}
}
}
//Special Functions
private void SQRTButton_MouseClick(object sender, MouseEventArgs e)
{
string input = SQRTButton.Text;
CalculatorState.getInstance().nextState(4, input);
textBox1.Text = SpecialOperationState.getInstance().display();
}
private void Digit7_Button_Click(object sender, EventArgs e)
{
string input = Digit7_Button.Text;
CalculatorState.getInstance().nextState(1, input);
textBox1.Text = CalculationState.getInstance().clearScreen();
textBox1.Text = CalculationState.getInstance().display();
}
public CalculatorState nextState(int state, string input)
{
switch (state)
{
case 0:
back.enter();
cal = back;
return(cal);
case 1:
digit.enter(input);
cal = digit;
return(cal);
case 2:
opr.enter(input);
cal = opr;
return(cal);
case 3:
isCalculationButtonPressed = true;
cs.enter();
cal = cs;
return(cal);
case 4:
sop.enter(input);
cal = sop;
return(cal);
case 5:
ces.enter();
cal = ces;
return(cal);
case 6:
clear.enter();
cal = clear;
return(cal);
default:
return(cal);
}
}
private void ClearButton_MouseClick(object sender, MouseEventArgs e)
{
CalculatorState.getInstance().nextState(6, null);
textBox1.Text = ClearState.getInstance().display();
}
private void ClearAll_MouseClick(object sender, MouseEventArgs e)
{
CalculatorState.getInstance().nextState(5, null);
textBox1.Text = ClearEverythingState.getInstance().display();
}
private void BackspaceButton_MouseClick(object sender, MouseEventArgs e)
{
CalculatorState.getInstance().nextState(0, null);
textBox1.Text = BackspaceState.getInstance().display();
}