Nested loops emulation for OpenSesame

# Generated by OpenSesame 2.8.0 (Gutsy Gibson)
# Wed Mar  5 09:55:24 2014 (posix)
# <http://www.cogsci.nl/opensesame>

set mouse_backend "xpyriment"
set subject_parity "even"
set height "768"
set font_italic "no"
set canvas_backend "xpyriment"
set synth_backend "legacy"
set start "experiment"
set title "Nested loops"
set coordinates "relative"
set width "1024"
set sampler_backend "legacy"
set transparent_variables "no"
set foreground "white"
set font_bold "no"
set description "A template containing a practice and an experimental phase"
set background "black"
set font_size "18"
set keyboard_backend "legacy"
set font_family "mono"
set compensation "0"
set bidi "no"
set subject_nr "0"

define sequence dummy_sequence

define loop block_loop
	set repeat "4"
	set description "A single block of trials"
	set item "trial_sequence"
	set column_order "var1;var2"
	set cycles "1"
	set order "random"
	setcycle 0 var1 "=self.experiment.list1.pop()"
	setcycle 0 var2 "=self.experiment.list2.pop()"
	run trial_sequence

define sequence experiment
	set flush_keyboard "yes"
	set description "The main sequence of the experiment"
	run loop1 "never"
	run loop2 "never"
	run extract_loops "always"
	run block_loop "always"

define sequence trial_sequence
	set flush_keyboard "yes"
	set description "A single trial"
	run sketchpad "always"

define inline_script extract_loops
	set _run ""
	___prepare__
	from random import shuffle

	# Extract the column `var1` from the loop item `loop1` and save it as a list
	# as self.experiment.list1 (self.experiment == exp).
	loop1 = exp.items['loop1']
	exp.list1 = []
	for i in sorted(loop1.matrix):
		val = loop1.matrix[i]['var1']
		exp.list1.append(val)
	# Shuffle the list1, so that we will pop the items from it in a random order.
	shuffle(list1)


	# Extract the column `var2` from the loop item `loop2` and save it as a list
	# as self.experiment.list2 (self.experiment == exp).
	loop2 = exp.items['loop2']
	exp.list2 = []
	for i in sorted(loop2.matrix):
		val = loop2.matrix[i]['var2']
		exp.list2.append(val)
	# Reverse the list. This is necessary because we will `pop` from the list, which
	# means we start with the last item.
	list2.reverse()
	__end__
	set description "Executes Python code"

define loop loop2
	set repeat "1"
	set description "Repeatedly runs another item"
	set item "dummy_sequence"
	set break_if "always"
	set column_order "var2"
	set cycles "4"
	set order "random"
	setcycle 0 var2 "B1"
	setcycle 1 var2 "B2"
	setcycle 2 var2 "B3"
	setcycle 3 var2 "B4"
	run dummy_sequence

define loop loop1
	set repeat "1"
	set description "Repeatedly runs another item"
	set skip "0"
	set item "dummy_sequence"
	set break_if "always"
	set column_order "var1"
	set cycles "4"
	set order "sequential"
	setcycle 0 var1 "A1"
	setcycle 1 var1 "A2"
	setcycle 2 var1 "A3"
	setcycle 3 var1 "A4"
	run dummy_sequence

define sketchpad sketchpad
	set duration "keypress"
	set description "Displays stimuli"
	set start_response_interval "no"
	draw fixdot 0 0 color=white show_if="always"
	draw textline 0 -96 "[var1] [var2]" center=1 color=white font_family="mono" font_size=18 font_italic=no font_bold=no show_if="always" html="yes"