def __init_text(self):
""" Initialize the target word and alphabet texts and adjust
the symbol position.
"""
sz = self.screen.size
self._word = TargetWord(position=(sz[0] / 2., sz[1] - self._word_vpos),
symbol_size=self._word_font_size,
target_size=self._word_target_font_size,
target_frame=self._show_target_frame,
target_frame_width=self._target_frame_width,
center_at_target=True)
self.add_stimuli(self._word)
if self._show_alphabet:
self._alphabet = self.add_color_word(
position=(sz[0] / 2., sz[1] - self._alphabet_vpos),
font_size=self._alphabet_font_size)
class View(VisionEggView):
def __init__(self, palette):
self._palette = palette
self.__init_attributes()
VisionEggView.__init__(self)
def __init_attributes(self):
self._logger = logging.getLogger('View')
self._symbol_duration = 0.05
self._font_size = 150
def reinit(self):
VisionEggView.reinit(self)
sz = self.screen.size
self._center_text.set_position((sz[0] / 2., sz[1] - self._symbol_vpos))
def init(self):
self.__init_text()
def __init_text(self):
""" Initialize the target word and alphabet texts and adjust
the symbol position.
"""
sz = self.screen.size
self._word = TargetWord(position=(sz[0] / 2., sz[1] - self._word_vpos),
symbol_size=self._word_font_size,
target_size=self._word_target_font_size,
target_frame=self._show_target_frame,
target_frame_width=self._target_frame_width,
center_at_target=True)
self.add_stimuli(self._word)
if self._show_alphabet:
self._alphabet = self.add_color_word(
position=(sz[0] / 2., sz[1] - self._alphabet_vpos),
font_size=self._alphabet_font_size)
def _symbol_color(self, symbol):
return self._palette(symbol) if self._alternating_colors else \
self._font_color
def alphabet(self, alphabet):
if self._show_alphabet:
colors = map(self._symbol_color, alphabet)
self._alphabet.set(text=alphabet, colors=colors)
def word(self, word):
""" Introduce a new word, optionally with colored symbols. """
self._word.set_all(on=False)
colors = map(self._symbol_color, word)
self.center_word(word, colors)
self.present(self._present_word_time)
self._word.set(text=word, colors=colors)
def target(self, index):
""" Introduce a new target symbol by increasing its size and
presenting the word in the headline.
"""
self._word.set(target=index)
self._word.set_all(on=True)
self._center_text.set_all(on=False)
self.present(self._present_target_time)
self._center_text.set_all(on=True)
def eeg_letter(self, text, symbol, update_word=True):
self._trigger(marker.FEEDBACK_START, wait=True)
colors = map(self._symbol_color, text)
self.symbol(symbol, self._symbol_color(symbol))
self.present(self._present_eeg_input_time)
self._center_text.set_all(on=False)
self._trigger(marker.FEEDBACK_END, wait=True)
if update_word:
self._word.set(text=text, target=len(text) - 1, colors=colors)
def symbol(self, symbol, color=None):
""" Display a single symbol, either in the standard font color
or using the function parameter.
"""
if color is None:
color = self._font_color
self.center_word(symbol, (color, ))
