private void addToolStripMenuItem_Click(object sender, EventArgs e)
{
char newVariable = CreateVariableDialog.EnterVariable();
if (newVariable != '\0')
{
// find the index in the variable list at which to add the variable
int index = listBoxVariables.SelectedIndex != -1 ? listBoxVariables.SelectedIndex : DataSet.Variables.Length;
// check the data set does not already contain this variable
foreach (char existingVariable in listBoxVariables.Items)
{
if (existingVariable == newVariable)
{
MessageBox.Show("The variable " + newVariable + " already exists.", "Add Variable", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
}
// adds the variable to the data set
DataSet.AddVariable(
index,
newVariable,
0.0);
// adds the variable to the list box
listBoxVariables.Items.Insert(index, newVariable);
listBoxVariables.SelectedIndex = index;
}
}
/// <summary>
/// Prompts the user to enter a variable name.
/// </summary>
/// <param name="oneKey">Whether the dialog only requires a single key-press of input before automatically closing.</param>
/// <param name="defaultChar">The default character displayed to the user in the dialog window.</param>
/// <returns>Returns the character entered by the user. If the user cancels the interaction, the null character ('\0') is returned.</returns>
public static char EnterVariable(char defaultChar = '?', bool oneKey = true)
{
CreateVariableDialog dialog = new CreateVariableDialog(defaultChar, oneKey);
if (dialog.ShowDialog() == DialogResult.OK)
{
return(dialog.EnteredChar);
}
else
{
return('\0');
}
}
private void renameToolStripMenuItem_Click(object sender, EventArgs e)
{
int selectedIndex = listBoxVariables.SelectedIndex;
if (selectedIndex != -1)
{
// asks the user for the new name for the variable
char newName = CreateVariableDialog.EnterVariable(DataSet.Variables[selectedIndex]);
if (newName != '\0')
{
// renames the variable as long as the user did not close the dialog
// (ie. when null character is returned)
DataSet.Variables[selectedIndex] = newName;
listBoxVariables.Items.RemoveAt(selectedIndex);
listBoxVariables.Items.Insert(selectedIndex, newName.ToString());
}
}
}
/// <summary>
/// Initializes the handlers for the buttons on the form that add the appropriate event handlers
/// and keyboard shortcut handlers for all of the buttons on the form. This uses the
/// <see cref="CreateTokenButton"/> method to create the event handlers.
/// </summary>
private void InitializeButtons()
{
#region Digits
CreateTokenButton(button0, () => new DigitToken(0), "0 key", Keys.D0);
CreateTokenButton(button1, () => new DigitToken(1), "1 key", Keys.D1);
CreateTokenButton(button2, () => new DigitToken(2), "2 key", Keys.D2);
CreateTokenButton(button3, () => new DigitToken(3), "3 key", Keys.D3);
CreateTokenButton(button4, () => new DigitToken(4), "4 key", Keys.D4);
CreateTokenButton(button5, () => new DigitToken(5), "5 key", Keys.D5);
CreateTokenButton(button6, () => new DigitToken(6), "6 key", Keys.D6);
CreateTokenButton(button7, () => new DigitToken(7), "7 key", Keys.D7);
CreateTokenButton(button8, () => new DigitToken(8), "8 key", Keys.D8);
CreateTokenButton(button9, () => new DigitToken(9), "9 key", Keys.D9);
CreateTokenButton(buttonDecimalPoint, () => new SymbolicToken(SymbolicToken.SymbolicType.DecimalPoint), ". key", Keys.OemPeriod);
#endregion
#region Basic Operations
CreateTokenButton(buttonAdd, () => new OperationToken(OperationToken.OperationType.Add), "Plus Key", Keys.Oemplus, Keys.Shift);
CreateTokenButton(buttonSubtract, () => new OperationToken(OperationToken.OperationType.Subtract), "Minus Key", Keys.OemMinus);
CreateTokenButton(buttonMultiply, () => new OperationToken(OperationToken.OperationType.Multiply), "Shift-8 (*)", Keys.D8, Keys.Shift);
CreateTokenButton(buttonDivide, () => new OperationToken(OperationToken.OperationType.Divide), "Backslash", Keys.Oem5);
#endregion
#region Roots
CreateTokenButton(buttonRoot, () => new RootToken(), "Ctrl-Shift-R", Keys.R, Keys.Control | Keys.Shift);
CreateTokenButton(buttonSqrt, () =>
{
var token = new RootToken();
token.Power.Add(new DigitToken(2));
return(token);
}, "Ctrl-R", Keys.R, Keys.Control);
#endregion
#region Trig
CreateTokenButton(buttonSin, () => new FunctionToken("sin"));
CreateTokenButton(buttonCos, () => new FunctionToken("cos"));
CreateTokenButton(buttonTan, () => new FunctionToken("tan"));
CreateTokenButton(buttonArcsin, () => new FunctionToken("sin`"));
CreateTokenButton(buttonArccos, () => new FunctionToken("cos`"));
CreateTokenButton(buttonArctan, () => new FunctionToken("tan`"));
#endregion
#region Logs
CreateTokenButton(buttonLogN, () => new LogToken(), "Ctrl-L", Keys.L, Keys.Control);
CreateTokenButton(buttonLogE, () =>
{
var token = new LogToken();
token.Base.Add(new ConstantToken(ConstantToken.ConstantType.E));
return(token);
}, "Ctrl-Shift-L", Keys.L, Keys.Shift | Keys.Control);
CreateTokenButton(buttonLog10, () =>
{
var token = new LogToken();
token.Base.Add(new DigitToken(1));
token.Base.Add(new DigitToken(0));
return(token);
});
#endregion
#region Exponents
CreateTokenButton(buttonExp, () => new ExpToken(), "Shift-6 (^)", Keys.D6, Keys.Shift);
CreateTokenButton(buttonSquare, () =>
{
var token = new ExpToken();
token.Power.Add(new DigitToken(2));
return(token);
}, "Alt-2", Keys.D2, Keys.Alt);
CreateTokenButton(buttonCube, () =>
{
var token = new ExpToken();
token.Power.Add(new DigitToken(3));
return(token);
}, "Alt-3", Keys.D3, Keys.Alt);
CreateTokenButton(buttonReciprocate, () =>
{
var token = new ExpToken();
token.Power.Add(new OperationToken(OperationToken.OperationType.Subtract));
token.Power.Add(new DigitToken(1));
return(token);
}, "Alt-Minus", Keys.OemMinus, Keys.Alt);
#endregion
#region Constants
CreateTokenButton(buttonPi, () => new ConstantToken(ConstantToken.ConstantType.Pi), "P", Keys.P);
CreateTokenButton(buttonE, () => new ConstantToken(ConstantToken.ConstantType.E), "E", Keys.E);
#endregion
#region Misc
CreateTokenButton(buttonFraction, () => new FractionToken(), "Forward-slash", Keys.OemQuestion);
CreateTokenButton(buttonAbsolute, () => new AbsoluteToken(), "|", Keys.Oem5, Keys.Shift);
CreateTokenButton(buttonBracket, () => new FunctionToken(""), "(", Keys.D9, Keys.Shift);
// CreateExpressionButton(buttonComma, () => new SymbolicToken(SymbolicToken.SymbolicType.Comma), ",", Keys.Oemcomma);
CreateTokenButton(buttonPercent, () => new SymbolicToken(SymbolicToken.SymbolicType.Percent), "%", Keys.D5, Keys.Shift);
CreateTokenButton(buttonSymbolicExp, () => new SymbolicToken(SymbolicToken.SymbolicType.Exp10), "Ctrl-E", Keys.E, Keys.Control);
#endregion
CreateTokenButton(buttonXVariable, () => new VariableToken('x'), "X", Keys.X);
CreateTokenButton(buttonYVariable, () => new VariableToken('y'), "Y", Keys.Y);
CreateTokenButton(buttonCustomVariable, () =>
{
// creates an EnterVariable dialog to allow the user to enter any variable
// character they want (that isn't 'x' or 'y')
char customVariable = CreateVariableDialog.EnterVariable();
if (customVariable != '\0')
{
return(new VariableToken(customVariable));
}
else
{
return(null);
}
}, "Hash", Keys.Oem7);
CreateTokenButton(buttonEquals, () => new SymbolicToken(SymbolicToken.SymbolicType.Equals), "Equals", Keys.Oemplus);
}
