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#!/usr/bin/python2
import powermate
import time
import os
EVENT_BUTTON_PRESS = 1
EVENT_RELATIVE_MOTION = 2
button_pressed = False
single_tap = False
mode = "nav"
current_event=(0,0,time.time())
last_event=current_event
skipped_event = 0
pressed_time = 0
button_held = False
led_brightness = 255
#pm = powermate.PowerMate("/dev/powermate")
pm = powermate.PowerMate()
pm.SetLEDState(led_brightness,0,0,0,0)
def runcmd(cmd):
# print cmd
os.system(cmd)
def volume_action(action):
global mode
global led_brightness
if action == "L" :
print "Volume down"
if action == "R" :
print "Volume UP"
if action == "tap" :
print "toggle mute"
if action == "double_tap" :
mode = "nav"
led_brightness = 500
print "mode is now nav"
return
def nav_action(action):
global mode
global led_brightness
keycmd = '''xdotool search --name "Mythtv Frontend" key %s'''
if action == "L" :
#print "prev"
cmd = keycmd %"Up"
runcmd(cmd)
if action == "R" :
#print "next"
cmd = keycmd %"Down"
runcmd(cmd)
if action == "LP" :
#print "back"
cmd = keycmd %"Left"
runcmd(cmd)
if action == "RP" :
#print "tab"
cmd = keycmd %"Right"
runcmd(cmd)
if action == "tap" :
#print "select"
cmd = keycmd %"Return"
runcmd(cmd)
if action == "double_tap" :
mode = "volume"
led_brightness = 10
print "mode is now vol"
if action == "button_held" :
cmd = keycmd %"Escape"
runcmd(cmd)
return
def act_on_event(action):
if mode == "volume":
volume_action(action)
elif mode == "nav":
nav_action(action)
event_stack=[current_event]
while 1:
#process_events = True
reset_lastevent = False
event = pm.WaitForEvent(2)
# print event
if event:
#event that happens after every button push, can be thrown away.
if event[2] == 0:
continue
elif single_tap:
pressed_diff = time.time() - pressed_time
#This takes care of the holding down the button for X amount of time
#print event, button_pressed, pressed_diff, current_event
#if pressed_diff >= 2 and button_pressed and current_event[0] == EVENT_BUTTON_PRESS:
if pressed_diff >= 2 and button_pressed :
act_on_event("button_held")
single_tap = False
pressed_time = 0
button_pressed = False
last_event_time = time.time()
last_event=(0,0,time.time())
pm.SetLEDState(led_brightness,0,0,0,0)
#print "resetting last event:", last_event
#This handles a single press of the button.
elif not button_pressed :
act_on_event("tap")
single_tap = False
last_event_time = time.time()
last_event=(0,0,time.time())
if event:
#print "processing:" , event
current_event = event[2],event[4],time.time()
last_event_time = last_event[2]
current_event_time = current_event[2]
last_event_only = last_event[0], last_event[1]
current_event_only = current_event[0], current_event[1]
repeat_rate = 10
repeat_time = .50
if last_event_only == current_event_only and current_event[0] == EVENT_RELATIVE_MOTION :
#check for time diff
event_time_diff = current_event_time - last_event_time
if skipped_event <= repeat_rate and event_time_diff <= repeat_time:
skipped_event = skipped_event + 1
#print "skipped a repeat event : %s" %skipped_event
continue
#event occured, reset skip counter
skipped_event = 0
#rotate dial
if current_event[0] == EVENT_RELATIVE_MOTION:
reset_lastevent = True
single_tap = False
if current_event[1] >= 0 :
if button_pressed :
#print "dial turned Counter clockwise and button is pressed"
act_on_event("RP")
else:
#print "dial turned Counter clockwise"
act_on_event("R")
if current_event[1] <=0 :
if button_pressed :
#print "dial turned clockwise and button is pressed"
act_on_event("LP")
else:
#print "dial turned clockwise"
act_on_event("L")
#button was pushed
if current_event[0] == EVENT_BUTTON_PRESS :
pm.SetLEDState(0,0,0,0,0)
if current_event[1] == 1:
button_pressed = True
pressed_time = current_event_time
tap_diff = current_event_time - last_event_time
#double tap
if tap_diff < 0.2 and last_event[0] == EVENT_BUTTON_PRESS:
act_on_event("double_tap")
single_tap = False
else:
single_tap = True
reset_lastevent = True
#button was released
elif current_event[1] == 0:
button_pressed = False
pressed_time = 0
pm.SetLEDState(led_brightness,0,0,0,0)
if reset_lastevent:
last_event = current_event
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