Stopwatch

Update 1.1 The settings menu has been moved up in the code.

FEATURES

• Start / stop / reset using the Select button
• Two display formats:
  HH:MM:SS
  MM:SS:CC — minutes, seconds and hundredths of a second
• Customizable text color
• Real-time hundredths display when using MM:SS:CC
• Automatically centered on the display
• Uses now_ms() for accurate elapsed-time measurement
• Keeps the elapsed time when stopped
• Works swiftly, at 40 fps
  SETTINGS
  In code look for section ====== START OF USER SETTINGS ======
  1. Stopwatch color
  self.STOPWATCH_COLOR = 0xFFFFFF
  The color uses the 0xRRGGBB format.
  Examples:
  0xFFFFFF = White
  0xFF0000 = Red
  0x00FF00 = Green
  0x0000FF = Blue
  0xFFFF00 = Yellow

2. Display format
self.STOPWATCH_FORMAT = 0
Available formats:

• 0 = HH:MM:SS

• 1 = MM:SS:CC
  Example:
  00:05:32

• Format 0 displays hours, minutes and seconds.

• Format 1 displays minutes, seconds and hundredths of a second:
  05:32:47
  Here 47 means 47 hundredths of a second (0.47 s).

Controls
The Select button has three functions depending on the current state.

• Start = When the stopwatch is reset, pressing Select starts it.
• Stop = When the stopwatch is running, pressing Select stops it and saves the elapsed time.
• Reset = When the stopwatch is stopped, pressing Select resets the elapsed time to zero.
• After resetting, pressing Select starts the stopwatch again.
  P.S. I have no idea how to extend the control of the stopwatch, since my Ulanzi TC001 watch only allows me to set it up like this. I did not find an option to add a continue button. Because it is not possible for me to receive a signal, for example, by pressing the Select button for a long time and it is not possible to assign a reset in this way. Therefore, now there is an opportunity to just start, pause and reset by pressing the Select button.

Accuracy
The stopwatch calculates elapsed time using:
now_ms()
The display in MM:SS:CC mode shows hundredths of a second (00–99).
The internal timer still works with milliseconds; only the displayed value is converted to hundredths.

Display
The current value is automatically centered horizontally using:
text_ink_width(value)
This allows both display formats to remain centered despite having different widths.

GENERAL
The code contains explanations if you want to change something.

Vibecoded with ChatGPT, polished by Avemer.
And I'm a newbie, hope someone might find this script usefull!