touch-screen.py

import evdev
from evdev import InputDevice, categorize, ecodes, list_devices

devices = map(InputDevice, list_devices())
device=""
for dev in devices:
    if "Touchscreen" in dev.name:
        device = dev
print device                  

if device != "":
    for event in device.read_loop():
        if event.type == ecodes.EV_KEY:
            #print categorize(event)
            #print event.type, event.code, event.value
            if event.code == ecodes.BTN_TOUCH and event.value == 1:
                #print 'You touched me'
                fr = open('/tmp/marquee-mode', 'r')
                mode = fr.readline().replace('\n','')
                fr.close()
                fw = open('/tmp/marquee-mode', 'w')
                if mode == '1':
                    fw.write('2')
                elif mode == '2':
                    fw.write('1')
                fw.close()
                print mode