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# -*- python -*-
# This example demonstrates how settings can be stored
# and be transition from later.
import os
import time
uses_adhoc_opts = True
'''
:bool `True` if the configuration script parses the ad-hoc settings
'''
# Get --temperature from Blueshift ad-hoc settigns
temperature_to = int(parser.opts['--temperature'][0])
# Get old temperature setting
temperature_from = 6500
def env_(var, default):
if var not in os.environ:
return default
rc = os.environ[var]
if rc == '':
rc = default
return rc
storage_file = '/dev/shm/.blueshift-conf-%s-%s' % (env_('DISPLAY', 'tty'), os.environ['USER'])
if os.path.exists(storage_file):
with open(storage_file, 'rb') as file:
temperature_from = int(file.read().decode('utf-8', 'replace').split('\n')[0])
# Store new temperature
with open(storage_file, 'wb') as file:
file.write(str(temperature_to).encode('utf-8'))
file.flush()
# Calculate transition time
fadein_time = abs(temperature_to - temperature_from) * 5 / (6500 - 3700)
fadein_steps = fadein_time * 10
# Function for setting the colour temperature
def adjust(alpha):
temp = temperature_to * alpha + temperature_from * (1 - alpha)
start_over()
temperature(temp, lambda t : divide_by_maximum(cmf_10deg(t)))
(drm if ttymode else randr)(0)
# Perform transition
if not (panicgate or temperature_to == temperature_from):
signal.signal(signal.SIGTERM, signal_SIGTERM)
dtime = fadein_time / fadein_steps
df = 1 / fadein_steps
trans = 0
while running:
try:
trans += df
if trans > 1:
break
adjust(trans)
time.sleep(dtime)
except KeyboardInterrupt:
running = False
adjust(1)
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