private void DeleteSelected()
{
var leftmost = Math.Min(_cursorIndex, _selectionOrigin);
var range = Math.Abs(_cursorIndex - _selectionOrigin);
DisplayString = DisplayString.Remove(leftmost, Math.Min(range, DisplayString.Length - leftmost));
_cursorIndex = leftmost;
_selectionActive = false;
AlignTextAndCursor();
}
public void TrimZeroes()
{
if (DisplayString.Contains(","))
{
while (DisplayString.EndsWith("0"))
{
DisplayString = DisplayString.Remove(DisplayString.Length - 1);
}
}
if (DisplayString.EndsWith(","))
{
DisplayString = DisplayString.Remove(DisplayString.Length - 1);
}
}
public bool Guess(char guess)
{
bool foundALetter = false;
for (int i = 0; i < hiddenString.Length; i++)
{
if (hiddenString[i] == guess)
{
DisplayString = DisplayString.Remove(i, 1);
DisplayString = DisplayString.Insert(i, guess.ToString());
foundALetter = true;
}
}
return(foundALetter);
}
public void Delete()
{
if (_selectionActive)
{
DeleteSelected();
}
else
{
if (_cursorIndex == DisplayString.Length)
{
return;
}
DisplayString = DisplayString.Remove(_cursorIndex, 1);
}
ClampCursor();
}
public void Backspace()
{
if (_selectionActive)
{
DeleteSelected();
}
else
{
if (_cursorIndex == 0)
{
return;
}
DisplayString = DisplayString.Remove(_cursorIndex - 1, 1);
_cursorIndex--;
}
ClampCursor();
}
// Нажатие оперирующих клавиш
private void ButtonOp_Click(object sender, RoutedEventArgs e)
{
switch ((sender as Button).Name)
{
case "btBack": // "<--"
if (!String.IsNullOrEmpty(DisplayString))
{
DisplayString = DisplayString.Remove(DisplayString.Length - 1);
if (DisplayString == "-")
{
DisplayString = "";
}
}
UpdateDisplayString();
break;
case "btC": // "C"
AllCleare();
break;
case "btCE": // "CE"
LastOperation = Operation.None;
DisplayString = LastValue;
UpdateDisplayString();
break;
case "btPM": // "+/-"
if (String.IsNullOrEmpty(DisplayString))
{
return;
}
if (DisplayString[0] == '-')
{
DisplayString = DisplayString.Replace("-", "");
}
else
{
DisplayString = DisplayString.Insert(0, "-");
}
UpdateDisplayString();
break;
case "btSqrt": // "Sqrt"
LastOperation = Operation.Sqrt;
LastValue = DisplayString;
Calculate();
LastValue = DisplayString;
LastOperation = Operation.None;
isCalculate = false;
isClearString = true;
break;
case "btPercent": // "%"
if (isCalculate)
{
Calculate();
LastOperation = Operation.Percent;
break;
}
LastOperation = Operation.Percent;
break;
case "btOneOver": // "1/x"
LastOperation = Operation.OneX;
LastValue = DisplayString;
Calculate();
LastValue = DisplayString;
LastOperation = Operation.None;
isCalculate = false;
isClearString = true;
break;
case "btDevide": // "/"
isClearString = true;
if (isCalculate)
{
Calculate();
LastOperation = Operation.Devide;
break;
}
LastOperation = Operation.Devide;
TempValue = "";
break;
case "btMultiply": // ""*
isClearString = true;
if (isCalculate)
{
Calculate();
LastOperation = Operation.Multiply;
break;
}
LastOperation = Operation.Multiply;
TempValue = "";
break;
case "btMinus": // "-"
isClearString = true;
if (isCalculate)
{
Calculate();
LastOperation = Operation.Minus;
break;
}
LastOperation = Operation.Minus;
TempValue = "";
break;
case "btPlus": // "+"
isClearString = true;
if (isCalculate)
{
Calculate();
LastOperation = Operation.Plus;
break;
}
LastOperation = Operation.Plus;
TempValue = "";
break;
case "btEqual": // "="
isClearString = true;
if (isCalculate)
{
TempValue = DisplayString;
Calculate();
AddDigit(DisplayString);
isCalculate = false;
isClearString = false;
DisplayString = "";
break;
}
else if (LastOperation != Operation.None)
{
if (!String.IsNullOrEmpty(DisplayString))
{
if (String.IsNullOrEmpty(TempValue))
{
TempValue = DisplayString;
}
AddDigit(DisplayString);
}
DisplayString = TempValue;
Calculate();
break;
}
break;
case "btMemClear": // "MC"
Memory = 0.0;
break;
case "btMemRead": // "MR"
DisplayString = Memory.ToString();
UpdateDisplayString();
break;
case "btMemSave": // "MS"
if (ValidateString(DisplayString))
{
Memory = StringToDigit(DisplayString);
DisplayString = "";
}
break;
case "btMemPlus": // "M+"
if (ValidateString(DisplayString))
{
Memory += StringToDigit(DisplayString);
}
break;
case "btMemMinus": // "M-"
if (ValidateString(DisplayString))
{
Memory -= StringToDigit(DisplayString);
}
break;
}
}