public MainViewModel()
{
Value = "0";
Number = new ParametrizedRelayCommand(
param =>
{
string newChar = param.ToString();
if (Value == "0" && newChar == "0")
{
Value = "0";
}
if (Value == "0")
{
Value = newChar;
}
else if (Value.EndsWith(".0") && newChar != "0")
{
Value = Value.Remove(Value.Length - 1, 1) + newChar;
}
else
{
Value += newChar;
}
},
param => true
);
Point = new RelayCommand(
() =>
{
Value += ".0";
Point.RaiseCanExecuteChanged();
},
() => (!Value.Contains("."))
);
Sign = new RelayCommand(
() => {
if (Value.StartsWith("-"))
{
Value = Value.Substring(1, Value.Length - 1);
}
else
{
Value = "-" + Value;
}
},
() => true
);
}
public MainViewModel()
{
NumberButton = new ParametrizedRelayCommand(
(param) =>
{
TextMessage += param;
},
() => { return(true); }
);
Sign = new RelayCommand(
() =>
{
if (TextMessage.Length > 0)
{
TextMessage = Convert.ToString((Convert.ToDouble(TextMessage) * (-1)));
}
},
() => { return(true); }
);
Point = new RelayCommand(
() =>
{
if ((!TextMessage.Contains(".")) && TextMessage.Length > 0)
{
TextMessage += ".";
}
},
() => { return(true); }
);
Reset = new RelayCommand(
() =>
{
TextMessage = "";
_storedValue = "";
},
() => { return(true); }
);
Result = new RelayCommand(
() =>
{
if (_operation == 1)
{
TextMessage = Convert.ToString(Convert.ToDouble(_storedValue) + Convert.ToDouble(TextMessage));
_operation = 0;
}
if (_operation == 2)
{
TextMessage = Convert.ToString(Convert.ToDouble(_storedValue) - Convert.ToDouble(TextMessage));
_operation = 0;
}
if (_operation == 3)
{
TextMessage = Convert.ToString(Convert.ToDouble(_storedValue) * Convert.ToDouble(TextMessage));
_operation = 0;
}
if (_operation == 4)
{
if (TextMessage == "0")
{
TextMessage = "Nonono Zero is not allowed!!!";
}
else
{
TextMessage = Convert.ToString(Convert.ToDouble(_storedValue) / Convert.ToDouble(TextMessage));
_operation = 0;
}
}
if (_function == 1)
{
TextMessage = Convert.ToString(Math.Pow(Convert.ToDouble(_storedValue), Convert.ToDouble(TextMessage)));
_function = 0;
}
if (_function == 2)
{
TextMessage = Convert.ToString(Math.Sqrt(Convert.ToDouble(_storedValue)));
_function = 0;
}
if (_function == 3)
{
TextMessage = Convert.ToString(Math.Log(Convert.ToDouble(TextMessage), Convert.ToDouble(_storedValue)));
_function = 0;
}
if (_function == 4)
{
TextMessage = Convert.ToString(Math.Sin(Convert.ToDouble(_storedValue)));
_function = 0;
}
},
() => { return(true); }
);
OperationButton = new ParametrizedRelayCommand(
(param) =>
{
_storedValue = TextMessage;
TextMessage = "";
if (Convert.ToString(param) == "+")
{
_operation = 1;
}
if (Convert.ToString(param) == "-")
{
_operation = 2;
}
if (Convert.ToString(param) == "*")
{
_operation = 3;
}
else if (Convert.ToString(param) == "/")
{
_operation = 4;
}
},
() => { return(true); }
);
FunctionButton = new ParametrizedRelayCommand(
(param) =>
{
_storedValue = TextMessage;
TextMessage = "";
if (Convert.ToString(param) == "X**Y")
{
_function = 1;
}
if (Convert.ToString(param) == "Sqrt")
{
_function = 2;
}
if (Convert.ToString(param) == "Log")
{
_function = 3;
}
if (Convert.ToString(param) == "Sin")
{
_function = 4;
}
},
() => { return(true); }
);
}
public VjuMoudl()
{
Point = new RelayCommand(
() =>
{
if (!(Text.Contains(".")) && Text.Length > 0)
{
Text += ".";
}
}
);
Sign = new RelayCommand(
() =>
{
Text = Convert.ToString((Convert.ToDouble(Text) + (-1)));
}
);
Reset = new RelayCommand(
() =>
{
Text = "";
_storedValue = "";
}
);
Number = new ParametrizedRelayCommand(
(param) =>
{
Text += param;
}
);
//operace (rychlá akce)
Operation = new ParametrizedRelayCommand(
(param) =>
{
_storedValue = Text;
Text = "";
if (Convert.ToString(param) == "+")
{
_oper = 1;
}
if (Convert.ToString(param) == "-")
{
_oper = 2;
}
if (Convert.ToString(param) == "*")
{
_oper = 3;
}
if (Convert.ToString(param) == "/")
{
_oper = 4;
}
}
);
Function = new ParametrizedRelayCommand(
(param) =>
{
_storedValue = Text;
if (Convert.ToString(param) == "sin")
{
_func = 1;
}
if (Convert.ToString(param) == "cos")
{
_func = 2;
}
if (Convert.ToString(param) == "log")
{
_func = 3;
}
if (Convert.ToString(param) == "moc")
{
_func = 4;
}
}
);
Result = new RelayCommand(
() =>
{
if (_oper == 1)
{
Text = Convert.ToString(Convert.ToDouble(_storedValue) + Convert.ToDouble(Text));
}
if (_oper == 2)
{
Text = Convert.ToString(Convert.ToDouble(_storedValue) - Convert.ToDouble(Text));
}
if (_oper == 3)
{
Text = Convert.ToString(Convert.ToDouble(_storedValue) * Convert.ToDouble(Text));
}
if (_oper == 4)
{
if (Text == "0")
{
Text = "Nulou ne, takhle to nefunguje";
}
else
{
Text = Convert.ToString(Convert.ToDouble(_storedValue) / Convert.ToDouble(Text));
}
}
if (_func == 1)
{
Text = Convert.ToString(Math.Sin(Convert.ToDouble(Text)));
}
if (_func == 2)
{
Text = Convert.ToString(Math.Cos(Convert.ToDouble(Text)));
}
if (_func == 3)
{
Text = Convert.ToString(Math.Log(Convert.ToDouble(Text)));
}
if (_func == 4)
{
Text = Convert.ToString(Convert.ToDouble(Text) * Convert.ToDouble(Text));
}
}
);
}
public MainViewModel()
{
Value = "0";
Number = new ParametrizedRelayCommand(
param =>
{
string newChar = param.ToString();
if (Value == "0" && newChar == "0")
{
Value = "0";
}
else if (Value == "0")
{
Value = newChar;
}
else if (Value.EndsWith(".0") && newChar != "0")
{
Value = Value.Remove(Value.Length - 1, 1) + newChar;
}
else if (Value.EndsWith(".0") && newChar == "0")
{
Value = "0" + newChar;
}
else
{
Value += newChar;
}
},
param => true
);
Point = new RelayCommand(
() =>
{
Value += ".0";
Point.RaiseCanExecuteChanged();
},
() => (!Value.Contains("."))
);
Sign = new RelayCommand(
() =>
{
if (Value.StartsWith("-"))
{
Value = Value.Substring(1, Value.Length - 1);
}
else
{
Value = "-" + Value;
}
},
() => true
);
Reset = new RelayCommand(
() =>
{
Value = "0";
Point.RaiseCanExecuteChanged();
},
() => true
);
Operation = new ParametrizedRelayCommand(
param =>
{
Point.RaiseCanExecuteChanged();
switch (param)
{
case "+":
Value1 = Value;
Value = "0";
Oper = "+";
break;
case "-":
Value1 = Value;
Value = "0";
Oper = "-";
break;
case "*":
Value1 = Value;
Value = "0";
Oper = "*";
break;
case "/":
Value1 = Value;
Value = "0";
Oper = "/";
break;
case "^":
Value1 = Value;
Value = "0";
Oper = "^";
break;
case "√x":
Value1 = Value;
Oper = "√x";
break;
case "sin(x)":
Value1 = Value;
Oper = "sin(x)";
break;
case "cos(x)":
Value1 = Value;
Oper = "cos(x)";
break;
case "=":
Value2 = Value;
double x = Double.Parse(Value1);
double y = Double.Parse(Value2);
double result;
switch (Oper)
{
case "+":
result = x + y;
Value = result.ToString();
break;
case "-":
result = x - y;
Value = result.ToString();
break;
case "*":
result = x * y;
Value = result.ToString();
break;
case "/":
if (y == 0)
{
Value = "Dělení nulou";
}
else
{
result = x / y;
Value = result.ToString();
}
break;
case "^":
result = Math.Pow(x, y);
Value = result.ToString();
break;
case "√x":
if (x < 0)
{
Value = "Odmocnění záp**ného čísla";
}
else
{
result = Math.Sqrt(x);
Value = result.ToString();
}
break;
case "sin(x)":
result = Math.Sin(x);
Value = result.ToString();
break;
case "cos(x)":
result = Math.Cos(x);
Value = result.ToString();
break;
default:
break;
}
break;
default:
break;
}
},
param => true
);
}
