redirect_keys.py

from subprocess import Popen, PIPE

TOP_LEFT = '00,00,00,00,00,01,00,11,01,01,00,00,00'
BOT_LEFT = '00,00,00,00,00,01,00,10,01,01,00,00,00'
TOP_RIGT = '00,00,00,00,00,01,00,15,01,01,00,00,00'
BOT_RIGT = '00,00,00,00,00,01,00,16,01,01,00,00,00'
END = '00,00,00,00,00,00,00,00,00,00,00,00,00'

A = '''keydown Control_L
key z
keyup Control_L
'''
B = '''keydown Control_L
key r
keyup Control_L
'''
C = '''keydown Control_L
key w
keyup Control_L
'''
D = '''keydown Control_L
key u
keyup Control_L
'''


def keypress(sequence):
    p = Popen(['xte'], stdin=PIPE)
    p.communicate(input=bytes(sequence, 'utf-8'))


def process_wacom():
    with open('/dev/input/by-id/usb-Wacom_Co._Ltd._Intuos_PS-event-if01', 'rb') as input:
        array = ''
        while True:
            byte = input.read(1)
            array += ',{0:02x}'.format(byte[0])
            if array.endswith(END):
                print(array)
                if TOP_LEFT in array:
                    print('TOP LEFT')
                    keypress(A)
                if BOT_LEFT in array:
                    print('BOTTOM LEFT')
                    keypress(B)
                if TOP_RIGT in array:
                    print('TOP RIGHT')
                    keypress(C)
                if BOT_RIGT in array:
                    print('BOTTOM RIGHT')
                    keypress(D)
                array = ''


if __name__ == '__main__':
    print('Starting redirection')
    try:
        process_wacom()
    except IOError:
        print('Tablet is not available...')