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loop.py
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loop.py
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#-*- coding:utf-8 -*-
"""
This file is part of OpenSesame.
OpenSesame is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenSesame is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OpenSesame. If not, see <http://www.gnu.org/licenses/>.
"""
from libopensesame.py3compat import *
from qdatamatrix import QDataMatrix
from pseudorandom import EnforceFailed
from libopensesame.loop import loop as loop_runtime
from libopensesame.exceptions import osexception
from libqtopensesame.items.qtitem import qtitem
from libqtopensesame.items.qtstructure_item import qtstructure_item
from libqtopensesame.widgets.loop_widget import loop_widget
from libqtopensesame.widgets.tree_item_item import tree_item_item
from libqtopensesame.misc.translate import translation_context
import math
_ = translation_context(u'loop', category=u'item')
class loop(qtstructure_item, qtitem, loop_runtime):
"""The GUI for the loop item"""
description = _(u'Repeatedly runs another item')
help_url = u'manual/structure/loop'
lazy_init = True
def __init__(self, name, experiment, string=None):
"""See qtitem."""
self.lock_cycles = False
loop_runtime.__init__(self, name, experiment, string)
qtstructure_item.__init__(self)
qtitem.__init__(self)
def init_edit_widget(self):
"""Builds the loop controls."""
qtitem.init_edit_widget(self, stretch=False)
self.loop_widget = loop_widget(self.experiment.main_window)
self.qdm = QDataMatrix(self.dm)
self.qdm.changed.connect(self._apply_table)
self.edit_vbox.addWidget(self.loop_widget)
self.edit_vbox.addWidget(self.qdm)
self.set_focus_widget(self.qdm)
self.auto_add_widget(self.loop_widget.ui.spinbox_repeat, u'repeat')
self.auto_add_widget(self.loop_widget.ui.combobox_order, u'order')
self.auto_add_widget(self.loop_widget.ui.combobox_source, u'source',
apply_func=self._apply_source)
self.auto_add_widget(
self.loop_widget.ui.edit_source_file, u'source_file')
self.auto_add_widget(self.loop_widget.ui.edit_break_if, u'break_if')
self.auto_add_widget(self.loop_widget.ui.checkbox_break_if_on_first,
u'break_if_on_first')
self.auto_add_widget(self.loop_widget.ui.checkbox_continuous,
u'continuous')
self.loop_widget.ui.combobox_item.activated.connect(self._apply_item)
self.loop_widget.ui.button_preview.clicked.connect(self._show_preview)
self.loop_widget.ui.button_wizard.clicked.connect(self._show_wizard)
def _show_wizard(self):
"""
desc:
Shows the full-factorial-design wizard.
"""
from libqtopensesame.dialogs.loop_wizard import loop_wizard
d = loop_wizard(self.main_window)
dm = d.exec_()
if dm is None:
return
dm.sorted = False
self.dm = dm
self.update()
def _show_preview(self):
"""
desc:
Shows a preview tab for the loop table.
"""
l = [_(u'# Preview of loop table'), u'\n\n']
try:
dm = self._create_live_datamatrix()
except (osexception, EnforceFailed) as e:
l.append(_(u'Failed to generate preview.'))
l.append(u'\n~~~ .python\n%s\n~~~' % e)
else:
l.append(u'\n\n<table><thead><tr>')
l.append(u''.join([u'<th>%s</th>' % column_name \
for column_name in dm.column_names]))
l.append(u'</tr></thead><tbody>')
for row in dm:
l.append(u'<tr>' \
+ u''.join([u'<th>%s</th>' % val for name, val in row]) \
+ u'</tr>')
l.append(u'</tbody></table>')
md = u'\n'.join(l)
self.tabwidget.open_markdown(md, title=u'Loop preview', icon=u'os-loop')
@qtstructure_item.clears_children_cache
def _apply_item(self, *args):
"""
desc:
Applies changes to the item combobox.
argument-list:
args: Dummy arguments passed by the signal-slot system.
"""
self._item = self.loop_widget.ui.combobox_item.selected_item
self.experiment.build_item_tree()
self.update_script()
def _update_item(self):
"""
desc:
Updates the item combobox.
"""
self.loop_widget.ui.combobox_item.select(self._item)
def _apply_table(self):
"""
desc:
Applies changes to the loop table.
"""
# QDataMatrix can create a new datamatrix object, and that's the one we
# have to use.
self.dm = self.qdm.dm
if not self.dm:
self.dm.length = 1
self.qdm.refresh()
if not self.dm.columns:
self.dm.empty_column = u''
self.qdm.refresh()
self.update_script()
def _apply_source(self):
"""
desc:
Applies changes to the source selector, if a file source is
selected.
"""
self.var.source = self.loop_widget.ui.combobox_source.currentText()
self._update_source()
self.update_script()
def _update_source(self):
"""
desc:
Update the file-source selector, hiding it when the loop table is
used as source.
"""
file_mode = self.var.get(u'source', _eval=False) != u'table'
self.loop_widget.ui.label_source_file.setVisible(file_mode)
self.loop_widget.ui.edit_source_file.setVisible(file_mode)
self.loop_widget.ui.spacer.setVisible(file_mode)
self.qdm.setVisible(not file_mode)
def _row_count_text(self, n):
"""
desc:
A descriptive text for the number of rows.
arguments:
n: The number of rows.
returns:
A descriptive text.
"""
if n == 1:
return _(u'one row occurs')
if n == 2:
return _(u'two rows occur')
return _(u'%s rows occur' % n)
def _time_count_text(self, n):
"""
desc:
A descriptive text for the number of times an item is executed.
arguments:
n: The number of times.
returns:
A descriptive text.
"""
if n == 0:
return _(u'never')
if n == 1:
return _(u'once')
if n == 2:
return _(u'twice')
return _(u'%s times' % n)
def _set_summary(self, msg):
"""
desc:
Sets the summary label.
arguments:
msg: The summary message.
"""
self.loop_widget.ui.label_summary.setText(msg)
def _update_summary(self):
"""
desc:
Generates a loop summary and sets the summary label.
"""
if self._item not in self.experiment.items:
self._set_summary(_(u'Warning: No item to run has been specified'))
return
repeat = self.var.get(u'repeat', _eval=False)
order = self.var.get(u'order', _eval=False)
if not isinstance(repeat, (float, int)) \
or order not in self.valid_orders:
self._set_summary(
_(u'Note: Order or repeat is unknown or variably defined'))
return
if self.var.get(u'source', _eval=False) != u'table':
self._set_summary(
_(u'Note: Loop data will be read from file'))
return
f, i = math.modf(repeat)
length = int(repeat*len(self.dm))
numrows = len(self.dm)
r_freq = int(i+1)
n_freq = int(f * numrows)
r_rare = int(i)
n_rare = numrows - n_freq
s = _(u'Summary: <b>%s</b> will be called <b>%s</b> in <b>%s</b> order.') \
% (self._item, self._time_count_text(length), order)
s += u' ' + _(u'The number of rows is %s.') % numrows
if n_freq == 0:
s += u' ' + _(u'All rows occur %s.') % self._time_count_text(r_rare)
elif n_rare == 0:
s += u' ' + _(u'All rows occur %s.') % self._time_count_text(r_freq)
else:
s += u' ' + _(u'This means that %s %s and %s %s.') \
% (self._row_count_text(n_freq), \
self._time_count_text(r_freq), \
self._row_count_text(n_rare), \
self._time_count_text(r_rare))
self._set_summary(s)
def edit_widget(self):
"""See qtitem."""
qtitem.edit_widget(self)
self.loop_widget.ui.combobox_item.exclude = self.parents()
self.loop_widget.ui.combobox_item.refresh()
self.loop_widget.ui.combobox_item.select(self._item)
self.qdm.dm = self.dm
self.qdm.refresh()
self._update_summary()
self._update_item()
self._update_source()
def update_script(self):
"""See qtitem."""
qtitem.update_script(self)
self._update_summary()
def build_item_tree(self, toplevel=None, items=[], max_depth=-1,
extra_info=None):
"""See qtitem."""
items.append(self.name)
widget = tree_item_item(self, extra_info=extra_info)
if toplevel is not None:
toplevel.addChild(widget)
if (max_depth < 0 or max_depth > 1) \
and self._item in self.experiment.items:
self.experiment.items[self._item].build_item_tree(widget, items,
max_depth=max_depth-1)
return items
@qtstructure_item.cached_children
def children(self):
"""See qtitem."""
if self._item not in self.experiment.items:
return []
return [self._item] + self.experiment.items[self._item].children()
def is_child_item(self, item):
"""See qtitem."""
return self._item == item or (self._item in self.experiment.items and \
self.experiment.items[self._item].is_child_item(item))
@qtstructure_item.clears_children_cache
def insert_child_item(self, item_name, index=0):
"""See qtitem."""
self._item = item_name
self.update()
self.main_window.set_unsaved(True)
@qtstructure_item.clears_children_cache
def remove_child_item(self, item_name, index=0):
"""See qtitem."""
if item_name == self._item:
self._item = u''
if not self.update():
self.extension_manager.fire(u'change_item', name=self.name)
self.main_window.set_unsaved(True)
@qtstructure_item.clears_children_cache
def rename(self, from_name, to_name):
"""See qtitem."""
qtitem.rename(self, from_name, to_name)
if self._item == from_name:
self._item = to_name
@qtstructure_item.clears_children_cache
def delete(self, item_name, item_parent=None, index=None):
"""See qtitem."""
if self._item == item_name and item_parent == self.name:
self._item = u''