/// <summary>
/// OnFractionToggle() - Toggles display between fractional and floating point affecting the
/// display fields of input and result. Displays either the "/" key or the "." depending
/// whether using fractions or decimals.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
/// Side Effects:
/// Changes GLOBALS Fraction_class instance InBound and its display string sbInBound.
/// Changes GLOBALS Fraction_class instance Accumulator and display string sbAccumulator.
///
private void OnFractionToggle(object sender, EventArgs e)
{
string workString = this.FindByName <Button>("DotSlash").Text;
workString = workString == "/" ? "." : "/";
this.FindByName <Button>("DotSlash").Text = workString;
if (workString == ".")
{
displayToggle = DisplayToggle.floating;
this.FindByName <Button>("FractionToggle").Text = "Fraction";
this.FindByName <Button>("SpaceBar").IsVisible = false;
InBound.Parse(this.FindByName <Label>("Input").Text);
sbInBound.Clear();
sbInBound.Append(InBound.ToDisplayFloat(" "));
this.FindByName <Label>("Input").Text = sbInBound.ToString();
this.FindByName <Label>("Input").FontSize =
shrinkLabel(this.FindByName <Label>("Input"), 8, 60, sbInBound.ToString());
sbAccumulator.Clear();
sbAccumulator.Append(Accumulator.ToDisplayFloat(" "));
Accumulator.Parse(sbAccumulator.ToString());
this.FindByName <Label>("Result").Text = sbAccumulator.ToString();
this.FindByName <Label>("Result").FontSize =
shrinkLabel(this.FindByName <Label>("Result"), 16, 30, sbInBound.ToString());
}
else
{
displayToggle = DisplayToggle.fractional;
this.FindByName <Button>("FractionToggle").Text = "Decimal";
this.FindByName <Button>("SpaceBar").IsVisible = true;
sbInBound.Clear();
sbInBound.Append(InBound.ToDisplayFraction(" "));
InBound.Parse(sbInBound.ToString());
this.FindByName <Label>("Input").Text = sbInBound.ToString();
this.FindByName <Label>("Input").FontSize =
shrinkLabel(this.FindByName <Label>("Input"), 8, 60, sbInBound.ToString());
sbAccumulator.Clear(); // whats the best way to set stringbuilder?
sbAccumulator.Append(Accumulator.ToDisplayFraction(" "));
Accumulator.Parse(sbAccumulator.ToString());
this.FindByName <Label>("Result").Text = sbAccumulator.ToString();
this.FindByName <Label>("Result").FontSize =
shrinkLabel(this.FindByName <Label>("Result"), 16, 30, sbInBound.ToString());
}
}
// try/catch?
private void OnOperatorPressed(object sender, EventArgs e)
{
// procedurally there's no input yet, maybe better way to do this
if (this.FindByName <Label>("Input").Text is null || this.FindByName <Label>("Input").Text.Trim().Length == 0)
{
lastOperator = (sender as Button).Text.ToCharArray()[0];
return;
}
//
if (InBound.Parse(sbInBound.ToString()) == false)
{
this.FindByName <Label>("Input").Text = String.Empty; // nasty error response.
sbInBound.Clear();
return;
}
sbInBound.Clear();
this.FindByName <Label>("Input").Text = sbInBound.ToString();
UndoAccum.SetValueTo(Accumulator);
switch (lastOperator)
{
case '+':
Accumulator.Add(InBound);
break;
case '-':
Accumulator.Subtract(InBound);
break;
case '/':
Accumulator.DivideBy(InBound);
break;
case '*':
Accumulator.MultiplyBy(InBound);
break;
case '=':
if (Accumulator.ToDisplayFloat("0") == "0")
{
Accumulator.SetValueTo(InBound);
}
break;
case '%':
Accumulator.Modulus(InBound);
break;
default:
//-- Accumulator.SetValueTo(InBound);
break;
}
;
lastOperator = (sender as Button).Text.ToCharArray()[0];
sbAccumulator.Clear(); // whats the best way to set stringbuilder?
if (displayToggle == DisplayToggle.fractional)
{
sbAccumulator.Append(Accumulator.ToDisplayFraction());
}
else
{
sbAccumulator.Append(Accumulator.ToDisplayFloat());
}
this.FindByName <Label>("Result").Text = sbAccumulator.ToString();
this.FindByName <Label>("Result").FontSize =
shrinkLabel(this.FindByName <Label>("Result"), 16, 30, sbAccumulator.ToString());
}