private void HandleModifierPressed(object sender, ModifierPressedEventArgs e)
{
switch (e.Modifier)
{
case Modifier.Equal:
if (parenClosed)
{
current = parenStack[0];
this.view.Display = current.Result.ToString("0.####");
mode = Mode.Replace;
parenClosed = false;
break;
}
current.RightOperand = storedOperation;
this.view.Display = current.Result.ToString("0.####");
mode = Mode.Replace;
break;
case Modifier.Period:
current = storedOperation;
this.view.Display = current.Result.ToString("0.####");
mode = Mode.Replace;
entry = Entry.Decimal;
break;
case Modifier.Invert:
storedOperation = storedOperation.Result * -1;
current = storedOperation;
this.view.Display = current.Result.ToString("0.####");
break;
case Modifier.OpenParen:
parenStack.Add(current.Clone());
parenStackCount++;
mode = Mode.Replace;
this.view.Display = "0";
break;
case Modifier.ClosedParen:
parenStackCount--;
current.RightOperand = storedOperation;
parenStack[parenStackCount].RightOperand = current;
parenClosed = true;
mode = Mode.Replace;
this.view.Display = current.Result.ToString("0.####");
break;
}
}
private void HandleModifierPressed(object sender, ModifierPressedEventArgs e)
{
switch (e.Modifier)
{
case Modifier.Clear:
this.view.Display = "";
mode = Mode.Replace;
current = 0;
storedOperation = 0;
parenStack = new Stack <Operation>();
parenFlag = false;
break;
case Modifier.Equal:
if (parenFlag)
{
this.view.Display = current.Result.ToString("0.####");
mode = Mode.Replace;
parenFlag = false;
break;
}
if (equalFlag)
{
UpdateCurrentOperands(current, current.Result, storedOperation);
}
current.RightOperand = storedOperation;
this.view.Display = current.Result.ToString("0.####");
equalFlag = true;
mode = Mode.Replace;
break;
case Modifier.Period:
current = storedOperation;
this.view.Display = current.Result.ToString("0.");
mode = Mode.Replace;
entry = Entry.Decimal;
break;
case Modifier.Invert:
if (current.GetType() == typeof(Constant))
{
current = current.Result * -1;
storedOperation = storedOperation.Result * -1;
}
else if (current.LeftOperand == null && current.RightOperand == null)
{
storedOperation = storedOperation.Result * -1;
}
else if (current.LeftOperand != null && current.RightOperand == null)
{
current.LeftOperand = current.LeftOperand.Result * -1;
storedOperation = current.LeftOperand;
}
else if (current.LeftOperand != null && current.RightOperand != null)
{
current = current.Result * -1;
}
this.view.Display = "-" + this.view.Display;
break;
case Modifier.OpenParen:
parenStack.Push(current.Clone());
current = 0;
mode = Mode.Replace;
this.view.Display = "0";
break;
case Modifier.ClosedParen:
current.RightOperand = storedOperation;
var old = parenStack.Pop();
old.RightOperand = current;
this.view.Display = current.Result.ToString("0.####");
current = old;
mode = Mode.Replace;
parenFlag = true;
break;
}
}