5. EXT: Scroll text

5.1. display.scroll full syntax

The use of the wait parameter is useful when wanting to scroll text and play sounds at the same time.

display.scroll(value, delay=150, \*, wait=True, loop=False, monospace=False)

Scrolls value horizontally on the display.

value can be an integer or float (a decimal) or a string.

The delay parameter controls how fast the text scrolls.

The default delay is 150ms. When no delay is specified the default of 150ms is used.

The use of \*, in the syntax is to indicate that for those parameters after it, wait, loop and monospace, the arguments must be specified using their keyword. e.g wait=True is needed; not simply True.

If wait is True, this function will block until the animation is finished. If wait is False, the animation will happen in the background.

If loop is True, the animation will repeat forever.

If monospace is True, the characters will all take up 5 pixel-columns in width, otherwise there will be exactly 1 blank pixel-column between each character as they scroll.

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Exercise

1. Experiment with the named parameters by trying them out with True or False to see what effect they have.

2. Experiment with scrolling text using wait=False and playing sounds.