//Backspace Button, Remove Last Char
private void Back_Click(object sender, RoutedEventArgs e)
{
if (!isSecondNumber)
{
try
{
if (Num.Count() > 1)
{
string pointtest1 = Num.Substring(Num.Count() - 1);
if (pointtest1 == ",")
{
decimal1 = false;
}
Num = Num.Remove(Num.Count() - 1);
}
else
{
Num = "0";
}
}
catch
{
ArgumentOutOfRangeException ex = new ArgumentOutOfRangeException();
}
}
else
{
try
{
if (Num2.Count() > 1)
{
string pointtest2 = Num2.Substring(Num2.Count() - 1);
if (pointtest2 == ",")
{
decimal2 = false;
}
Num2 = Num2.Remove(Num2.Count() - 1);
}
else
{
Num2 = "0";
}
}
catch
{
ArgumentNullException ex = new ArgumentNullException();
}
}
}
//All Keyboard Hotkeys (Clone Functions inside Window Keydown Method)
private void Calc_KeyDown(object sender, KeyEventArgs e)
{
/*Operation/Function Keys*/
//Press Backspace Key
if (e.Key == Key.Back)
{
if (!isSecondNumber)
{
try
{
string pointtest1 = Num.Substring(Num.Count() - 1);
if (pointtest1 == ",")
{
decimal1 = false;
}
Num = Num.Remove(Num.Count() - 1);
}
catch
{
ArgumentOutOfRangeException ex = new ArgumentOutOfRangeException();
}
}
else
{
try
{
string pointtest2 = Num2.Substring(Num2.Count() - 1);
if (pointtest2 == ",")
{
decimal2 = false;
}
Num2 = Num2.Remove(Num2.Count() - 1);
}
catch
{
ArgumentNullException ex = new ArgumentNullException();
}
}
}
//Press + Key
if (e.Key == Key.Add)
{
Operation = "+";
if (!isSecondNumber)
{
isSecondNumber = true;
OnPropertyChanged();
}
else
{
if (Num2 != null)
{
Num = Calc;
Num2 = null;
decimal1 = false;
decimal2 = false;
OnPropertyChanged();
}
}
}
//Press - Key
if (e.Key == Key.Subtract)
{
Operation = "-";
if (!isSecondNumber)
{
isSecondNumber = true;
OnPropertyChanged();
}
else
{
if (Num2 != null)
{
Num = Calc;
Num2 = null;
decimal1 = false;
decimal2 = false;
OnPropertyChanged();
}
}
}
//Press * Key
if (e.Key == Key.Multiply)
{
Operation = "*";
if (!isSecondNumber)
{
isSecondNumber = true;
OnPropertyChanged();
}
else
{
if (Num2 != null)
{
Num = Calc;
Num2 = null;
decimal1 = false;
decimal2 = false;
OnPropertyChanged();
}
}
}
//Press / Key
if (e.Key == Key.Divide)
{
Operation = "÷";
if (!isSecondNumber)
{
isSecondNumber = true;
OnPropertyChanged();
}
else
{
if (Num2 != null)
{
Num = Calc;
Num2 = null;
decimal1 = false;
decimal2 = false;
OnPropertyChanged();
}
}
}
//Press P Key
if (e.Key == Key.P)
{
Operation = "P";
if (!isSecondNumber)
{
isSecondNumber = true;
OnPropertyChanged();
}
else
{
if (Num2 != null)
{
Num = Calc;
Num2 = null;
decimal1 = false;
decimal2 = false;
OnPropertyChanged();
}
}
}
//Press C Key
if (e.Key == Key.C)
{
isSecondNumber = false;
Num2 = "";
Num = "0";
Operation = "";
OnPropertyChanged();
}
//Press E Key
if (e.Key == Key.E)
{
if (isSecondNumber)
{
Num2 = "0";
OnPropertyChanged();
}
else
{
Num = "0";
OnPropertyChanged();
}
}
//Press , Key
if (e.Key == Key.Decimal)
{
if (!isSecondNumber)
{
if (!decimal1)
{
Num += ",";
decimal1 = true;
OnPropertyChanged();
}
}
else
{
if (!decimal2 && Num2 != null)
{
Num2 += ",";
decimal2 = true;
OnPropertyChanged();
}
}
}
//Press Enter Key
if (e.Key == Key.Enter)
{
if (Num2 != null)
{
Num = Calc;
Num2 = null;
Operation = "";
decimal1 = false;
decimal2 = false;
OnPropertyChanged();
}
}
/*Number Keys*/
//Press 0 Key
if (e.Key == Key.D0 || e.Key == Key.NumPad0)
{
AddNum("0");
}
//Press 1 Key
if (e.Key == Key.D1 || e.Key == Key.NumPad1)
{
AddNum("1");
}
//Press 2 Key
if (e.Key == Key.D2 || e.Key == Key.NumPad2)
{
AddNum("2");
}
//Press 3 Key
if (e.Key == Key.D3 || e.Key == Key.NumPad3)
{
AddNum("3");
}
//Press 4 Key
if (e.Key == Key.D4 || e.Key == Key.NumPad4)
{
AddNum("4");
}
//Press 5 Key
if (e.Key == Key.D5 || e.Key == Key.NumPad5)
{
AddNum("5");
}
//Press 6 Key
if (e.Key == Key.D6 || e.Key == Key.NumPad6)
{
AddNum("6");
}
//Press 7 Key
if (e.Key == Key.D7 || e.Key == Key.NumPad7)
{
AddNum("7");
}
//Press 8 Key
if (e.Key == Key.D8 || e.Key == Key.NumPad8)
{
AddNum("8");
}
//Press 9 Key
if (e.Key == Key.D9 || e.Key == Key.NumPad9)
{
AddNum("9");
}
}