/// <summary>
/// Add a decimal to the current string
/// </summary>
public void Decimal()
{
if (!CheckIfCanPressButton())
{
return;
}
AudioManager.Instance.PlayClip(buttonClick, transform.position, .3f, 1f);
if (lastAction == CalculatorAction.Error)
{
return;
}
if (lastAction == CalculatorAction.Equals || lastAction == CalculatorAction.Operator)
{
displayString.Clear();
displayString.Append("0");
}
if (displayString.ToString().Contains("."))
{
return;
}
else
{
displayString.Append(".");
UpdateDisplayText();
lastAction = CalculatorAction.Input;
}
}
public Button(CalculatorAction calculatorAction)
{
switch (calculatorAction)
{
case CalculatorAction.Equals:
DisplayText = "=";
break;
case CalculatorAction.Add:
DisplayText = "+";
break;
case CalculatorAction.Subtract:
DisplayText = "-";
break;
case CalculatorAction.Multiply:
DisplayText = "x";
break;
case CalculatorAction.Divide:
DisplayText = "÷";
break;
default:
throw new ArgumentException($"Not a valid CalculatorAction: {calculatorAction.ToString()}");
}
}
/// <summary>
/// Append a number string to the current string
/// </summary>
/// <param name="numberString"></param>
public void AppendNumberString(string numberString)
{
if (!CheckIfCanPressButton())
{
return;
}
AudioManager.Instance.PlayClip(buttonClick, transform.position, .3f, 1f);
if (lastAction == CalculatorAction.Error)
{
return;
}
if (lastAction != CalculatorAction.Input)
{
SetCurrentString(0);
}
bool hasDecimal = displayString.ToString().Contains(".");
int maxLength = hasDecimal ? maximumDisplayCharacters + 1 : maximumDisplayCharacters;
if (displayString.Length < maxLength)
{
if (ParseDisplayStringValue() == 0 && !displayString.ToString().Contains(".") || wipeOnNextInput)
{
displayString.Clear();
wipeOnNextInput = false;
}
displayString.Append(numberString);
UpdateDisplayText();
lastAction = CalculatorAction.Input;
}
}
// Set error state
private void Error()
{
displayString.Clear();
displayString.Append("Err");
UpdateDisplayText();
lastAction = CalculatorAction.Error;
wipeOnNextInput = true;
}
private void Calculate(CalculatorAction action)
{
if (!LastResult.HasValue)
{
return;
}
decimal result = Result;
if (action == CalculatorAction.Percentage)
{
result /= 100m;
}
try
{
switch (LastAction)
{
case CalculatorAction.Add:
Result = LastResult.Value + result;
break;
case CalculatorAction.Divide:
Result = LastResult.Value / result;
break;
case CalculatorAction.Multiply:
Result = LastResult.Value * result;
break;
case CalculatorAction.OneDividedBy:
Result = 1m / LastResult.Value;
break;
case CalculatorAction.SquareRoot:
Result = (decimal)Math.Sqrt((double)LastResult.Value);
break;
case CalculatorAction.Subtract:
Result = LastResult.Value - result;
break;
default:
throw new NotSupportedException();
}
}
catch
{
HaveError = true;
ClearAll();
}
LastAction = CalculatorAction.None;
LastResult = null;
_textResult = "0";
}
/// <summary>
/// Clear the current display
/// </summary>
public void Clear()
{
if (!CheckIfCanPressButton())
{
return;
}
AudioManager.Instance.PlayClip(buttonClick, transform.position, .3f, 1f);
SetCurrentString(0);
rightValue = 0f;
lastAction = CalculatorAction.Input;
}
/// <summary>
/// Process operator input
/// </summary>
private void ProcessOperator()
{
if (lastAction == CalculatorAction.Operator || lastAction == CalculatorAction.Error)
{
return;
}
else if (leftValueExists)
{
Calculate();
}
leftValue = ParseDisplayStringValue();
leftValueExists = true;
lastAction = CalculatorAction.Operator;
}
private string GetActionChar(CalculatorAction calculatorAction)
{
switch (calculatorAction)
{
case CalculatorAction.Add: return "+";
case CalculatorAction.Divide: return "/";
case CalculatorAction.Multiply: return "*";
case CalculatorAction.Negative: return "±";
case CalculatorAction.OneDividedBy: return "1/x";
case CalculatorAction.Percentage: return "%";
case CalculatorAction.SquareRoot: return "√";
case CalculatorAction.Subtract: return "-";
default:
throw new NotSupportedException();
}
}
/// <summary>
/// Square root button function
/// </summary>
public void SquareRoot()
{
if (!CheckIfCanPressButton())
{
return;
}
AudioManager.Instance.PlayClip(buttonClick, transform.position, .3f, 1f);
if (lastAction == CalculatorAction.Error)
{
return;
}
lastAction = CalculatorAction.Input;
SetCurrentString(System.Math.Sqrt(ParseDisplayStringValue()));
wipeOnNextInput = true;
}
/// <summary>
/// Memory recall button function
/// </summary>
public void MemoryRecall()
{
if (!CheckIfCanPressButton())
{
return;
}
AudioManager.Instance.PlayClip(buttonClick, transform.position, .3f, 1f);
if (lastAction == CalculatorAction.Error)
{
return;
}
if (memoryExists)
{
SetCurrentString(memoryValue);
lastAction = CalculatorAction.Input;
wipeOnNextInput = true;
}
}
/// <summary>
/// Clear the current display and stored values
/// </summary>
public void AllClear()
{
if (!CheckIfCanPressButton())
{
return;
}
AudioManager.Instance.PlayClip(buttonClick, transform.position, .3f, 1f);
leftValue = 0f;
leftValueExists = false;
rightValue = 0f;
memoryValue = 0f;
memoryExists = false;
SetCurrentString(0);
lastAction = CalculatorAction.None;
activeOperator = CalculatorOperator.None;
}
private void AddAction(CalculatorAction action)
{
if (LastAction != CalculatorAction.None)
{
Calculate(CalculatorAction.Perform);
}
LastAction = action;
LastResult = Result;
Result = 0m;
switch (action)
{
case CalculatorAction.OneDividedBy:
case CalculatorAction.SquareRoot:
Calculate(CalculatorAction.Perform);
break;
}
}
/// <summary>
/// Flip the sign button function
/// </summary>
public void FlipSign()
{
if (!CheckIfCanPressButton())
{
return;
}
AudioManager.Instance.PlayClip(buttonClick, transform.position, .3f, 1f);
if (lastAction == CalculatorAction.Error)
{
return;
}
double v = ParseDisplayStringValue();
if (v == 0f)
{
// Do nothing
}
else if (v < 0f)
{
displayString.Remove(0, 1);
UpdateDisplayText();
lastAction = CalculatorAction.Input;
}
else
{
if (displayString.Length > maximumDisplayCharacters - 1)
{
if (!displayString.ToString().Contains("."))
{
Error();
return;
}
}
displayString.Insert(0, "-");
UpdateDisplayText();
lastAction = CalculatorAction.Input;
}
}
private string GetActionChar(CalculatorAction calculatorAction)
{
switch (calculatorAction)
{
case CalculatorAction.Add: return("+");
case CalculatorAction.Divide: return("/");
case CalculatorAction.Multiply: return("*");
case CalculatorAction.Negative: return("±");
case CalculatorAction.OneDividedBy: return("1/x");
case CalculatorAction.Percentage: return("%");
case CalculatorAction.SquareRoot: return("√");
case CalculatorAction.Subtract: return("-");
default:
throw new NotSupportedException();
}
}
public void OperationAction(CalculatorAction action)
{
//This function would need to be fleshed out a bit to get postfix calculation working
}
public void Perform(CalculatorAction action)
{
_calculator.PerformAction(action);
}
internal Calculator()
{
_lastAction = CalculatorAction.None;
_result = 0;
}
internal void PerformAction(CalculatorAction action)
{
HaveError = false;
switch (action)
{
case CalculatorAction.Add:
case CalculatorAction.Divide:
case CalculatorAction.Multiply:
case CalculatorAction.OneDividedBy:
case CalculatorAction.SquareRoot:
case CalculatorAction.Subtract:
AddAction(action);
break;
case CalculatorAction.Negative: PerformNegative(); break;
case CalculatorAction.Percentage:
case CalculatorAction.Perform:
Calculate(action);
break;
case CalculatorAction.Add0: AddCharacter("0"); break;
case CalculatorAction.Add1: AddCharacter("1"); break;
case CalculatorAction.Add2: AddCharacter("2"); break;
case CalculatorAction.Add3: AddCharacter("3"); break;
case CalculatorAction.Add4: AddCharacter("4"); break;
case CalculatorAction.Add5: AddCharacter("5"); break;
case CalculatorAction.Add6: AddCharacter("6"); break;
case CalculatorAction.Add7: AddCharacter("7"); break;
case CalculatorAction.Add8: AddCharacter("8"); break;
case CalculatorAction.Add9: AddCharacter("9"); break;
case CalculatorAction.AddDecimal: AddCharacter("."); break;
case CalculatorAction.Backspace: RemoveCharacter(); break;
case CalculatorAction.MemoryAdd: MemoryAdd(); break;
case CalculatorAction.MemoryClear: MemoryClear(); break;
case CalculatorAction.MemoryRecall: MemoryRecall(); break;
case CalculatorAction.MemorySet: MemorySet(); break;
case CalculatorAction.MemorySubtract: MemorySubtract(); break;
case CalculatorAction.Clear: ClearAll(); break;
case CalculatorAction.ClearEntry: ClearEntry(); break;
default:
throw new NotSupportedException();
}
}
internal void PerformAction(CalculatorAction action)
{
HaveError = false;
switch (action)
{
case CalculatorAction.Add:
case CalculatorAction.Divide:
case CalculatorAction.Multiply:
case CalculatorAction.OneDividedBy:
case CalculatorAction.SquareRoot:
case CalculatorAction.Subtract:
AddAction(action);
break;
case CalculatorAction.Negative: PerformNegative(); break;
case CalculatorAction.Percentage:
case CalculatorAction.Perform:
Calculate(action);
break;
case CalculatorAction.Add0: AddCharacter("0"); break;
case CalculatorAction.Add1: AddCharacter("1"); break;
case CalculatorAction.Add2: AddCharacter("2"); break;
case CalculatorAction.Add3: AddCharacter("3"); break;
case CalculatorAction.Add4: AddCharacter("4"); break;
case CalculatorAction.Add5: AddCharacter("5"); break;
case CalculatorAction.Add6: AddCharacter("6"); break;
case CalculatorAction.Add7: AddCharacter("7"); break;
case CalculatorAction.Add8: AddCharacter("8"); break;
case CalculatorAction.Add9: AddCharacter("9"); break;
case CalculatorAction.AddDecimal: AddCharacter("."); break;
case CalculatorAction.Backspace: RemoveCharacter(); break;
case CalculatorAction.MemoryAdd: MemoryAdd(); break;
case CalculatorAction.MemoryClear: MemoryClear(); break;
case CalculatorAction.MemoryRecall: MemoryRecall(); break;
case CalculatorAction.MemorySet: MemorySet(); break;
case CalculatorAction.MemorySubtract: MemorySubtract(); break;
case CalculatorAction.Clear: ClearAll(); break;
case CalculatorAction.ClearEntry: ClearEntry(); break;
default:
throw new NotSupportedException();
}
}
public void Perform(CalculatorAction action)
{
_calculator.PerformAction(action);
}
private void AddAction(CalculatorAction action)
{
if (LastAction != CalculatorAction.None)
Calculate(CalculatorAction.Perform);
LastAction = action;
LastResult = Result;
Result = 0m;
switch (action)
{
case CalculatorAction.OneDividedBy:
case CalculatorAction.SquareRoot:
Calculate(CalculatorAction.Perform);
break;
}
}
// Calculate the expression
private void Calculate()
{
if (activeOperator == CalculatorOperator.None)
{
return;
}
switch (lastAction)
{
case CalculatorAction.Operator:
rightValue = leftValue;
break;
case CalculatorAction.Input:
rightValue = ParseDisplayStringValue();
break;
case CalculatorAction.Equals:
// rightValue stays the same
break;
case CalculatorAction.None:
return;
}
// Set lastAction early in case Error happens in SetCurrentString()
// so that Error state can propagate
lastAction = CalculatorAction.Equals;
switch (activeOperator)
{
case CalculatorOperator.Add:
leftValue += rightValue;
SetCurrentString(leftValue);
break;
case CalculatorOperator.Subtract:
leftValue -= rightValue;
SetCurrentString(leftValue);
break;
case CalculatorOperator.Multiply:
leftValue *= rightValue;
SetCurrentString(leftValue);
break;
case CalculatorOperator.Divide:
if (rightValue != 0f)
{
leftValue /= rightValue;
}
else
{
Error();
return;
}
SetCurrentString(leftValue);
break;
}
}
private void Calculate(CalculatorAction action)
{
if (!LastResult.HasValue)
return;
decimal result = Result;
if (action == CalculatorAction.Percentage)
result /= 100m;
try
{
switch (LastAction)
{
case CalculatorAction.Add:
Result = LastResult.Value + result;
break;
case CalculatorAction.Divide:
Result = LastResult.Value / result;
break;
case CalculatorAction.Multiply:
Result = LastResult.Value * result;
break;
case CalculatorAction.OneDividedBy:
Result = 1m / LastResult.Value;
break;
case CalculatorAction.SquareRoot:
Result = (decimal)Math.Sqrt((double)LastResult.Value);
break;
case CalculatorAction.Subtract:
Result = LastResult.Value - result;
break;
default:
throw new NotSupportedException();
}
}
catch
{
HaveError = true;
ClearAll();
}
LastAction = CalculatorAction.None;
LastResult = null;
_textResult = "0";
}
internal Calculator()
{
_lastAction = CalculatorAction.None;
_result = 0;
}