import pygame, sys
import random
from neurodot_present.present_lib import Screen, FixationCross, CheckerBoardFlasher, bell, UserEscape, run_start_sequence, run_stop_sequence
pygame.init()
TASK_DURATION = 30 #seconds
FC = FixationCross()
try:
#start sequence
run_start_sequence()
#setup task
CBF = CheckerBoardFlasher(flash_rate=0) #no flashing
CBF.setup_checkerboard(64)
black_SCR = Screen(color = "black",fixation_cross = FC)
#run sequence
CBF.run(duration = TASK_DURATION, vsync_value = 1)
black_SCR.run(duration = 1, vsync_value = 0)
bell()
black_SCR.run(duration = 5, vsync_value = 0)
black_SCR.run(duration = TASK_DURATION, vsync_value = 2)
black_SCR.run(duration = 1, vsync_value = 0)
bell()
except UserEscape:
print "User stopped the sequence"
except Exception, err:
raise err
finally:
FLASH_DURATION = 8 #seconds
PAUSE_DURATION_RANGE = (2.0,5.0)
FC = FixationCross()
#CBFs
try:
#start sequence
run_start_sequence()
#trials
for b in range(BLOCKS):
stims = REPITITIONS*zip(FLASH_RATES, VSYNC_VALUES)
random.shuffle(stims)
for flash_rate, vsync_value in stims:
CBF = CheckerBoardFlasher(flash_rate=flash_rate)
CBF.setup_checkerboard(nrows = CHECKERBOARD_NROWS, show_fixation_dot = True)
CBF.run(duration = FLASH_DURATION, vsync_value = vsync_value)
SCR = Screen(color = "black", fixation_cross = FC)
pause_duration = random.uniform(*PAUSE_DURATION_RANGE)
SCR.run(duration = pause_duration, vsync_value = 0)
except UserEscape as exc:
print exc
finally:
#stop sequence
run_stop_sequence()
#exit
print "Exiting the presentation"
pygame.quit()
sys.exit()
