pylcdproc/demo_bargraph at master · adicarlo/pylcdproc · GitHub

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#!/usr/bin/python3

import argparse
import pylcdproc
import getch
import sys

default_host = 'localhost'
default_port = 13666


def main():
    parser = argparse.ArgumentParser(description="Demonstrate the HBargraphLCD widget")
    parser.add_argument("initial", type=int, default=0, nargs='?', help="initial value")
    parser.add_argument("-H", "--host", default=default_host,
                        help="host to connect to (default: " + default_host + ")")
    parser.add_argument("-p", "--port", type=int, default=default_port,
                        help="port to connect to (default: " + str(default_port) + ")")
    parser.add_argument("-d", "--debug", action="store_true",
                        help="enable debugging")
    args = parser.parse_args()
    lcd = pylcdproc.HBargraphLCD("demo_bargraph", host=args.host, port=args.port, debug=args.debug)
    val = args.initial
    lcd.display(val)
    print("use left and right arrows to set bargraph value, currently", val)
    print("use 'x' or 'q' to quit")
    control = None
    while True:
        change = None
        key = getch.getch()
        if key == 'x' or key == 'q':
            print("exiting...")
            sys.exit(1)
        elif key == '[' or ord(key) == 27:
            control = True
            next
        elif key == 'C':
            change = 1
        elif key == 'D':
            change = -1
        else:
            ctrl = "ctrl" if control else ""
            print("unknown key:", ord(key), "'" + key + "'", ctrl)

        if control:             # reset control
            control = None


        if change:
            val += change
            print("new value:", val)
            lcd.display(val)


if __name__ == "__main__":
    main()