/// <summary>
/// Return the given pen button.
/// </summary>
/// <param name="button">Pen button to return.</param>
/// <exception cref="InvalidEnumArgumentException"><paramref name="button"/> is not a valid pen button.</exception>
public ButtonControl this[PenButton button]
{
get
{
switch (button)
{
case PenButton.Tip: return(tip);
case PenButton.Eraser: return(eraser);
case PenButton.BarrelFirst: return(firstBarrelButton);
case PenButton.BarrelSecond: return(secondBarrelButton);
case PenButton.BarrelThird: return(thirdBarrelButton);
case PenButton.BarrelFourth: return(fourthBarrelButton);
case PenButton.InRange: return(inRange);
default:
throw new InvalidEnumArgumentException(nameof(button), (int)button, typeof(PenButton));
}
}
}
/// <summary>
/// Set or unset the bit in <see cref="buttons"/> for the given <paramref name="button"/>.
/// </summary>
/// <param name="button">Button whose state to set.</param>
/// <param name="state">Whether the button is on or off.</param>
/// <returns>Same PenState with an updated <see cref="buttons"/> mask.</returns>
public PenState WithButton(PenButton button, bool state = true)
{
if (state)
{
buttons |= (ushort)(1 << (int)button);
}
else
{
buttons &= (ushort)~(1 << (int)button);
}
return(this);
}
/// <summary>
/// Set or unset the bit in <see cref="buttons"/> for the given <paramref name="button"/>.
/// </summary>
/// <param name="button">Button whose state to set.</param>
/// <param name="state">Whether the button is on or off.</param>
/// <returns>Same PenState with an updated <see cref="buttons"/> mask.</returns>
public PenState WithButton(PenButton button, bool state = true)
{
Debug.Assert((int)button < 16, $"Expected button < 16, so we fit into the 16 bit wide bitmask");
var bit = 1U << (int)button;
if (state)
{
buttons |= (ushort)bit;
}
else
{
buttons &= (ushort)~bit;
}
return(this);
}