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# GNU Solfege - free ear training software
# Copyright (C) 2006, 2007, 2008 Tom Cato Amundsen
#
# This program 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.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
import time
import gtk
import gu
import abstract
import lessonfile
import mpd
class Teacher(abstract.Teacher):
OK = 0
ERR_PICKY = 1
ERR_NO_ELEMS = 2
def __init__(self, exname, app):
abstract.Teacher.__init__(self, exname, app)
self.lessonfileclass = lessonfile.QuestionsLessonfile
def new_question(self):
self.m_P.select_random_question()
return self.OK
def get_timedelta_list(self):
"""
Return a list of the number of seconds between it should be between
each tap. Ignore "count-in" tones.
"""
if 'rhythm' in self.m_P.get_question():
qvar = 'rhythm'
else:
qvar = 'music'
is_rhythm = isinstance(self.m_P.get_question().music,
lessonfile.Rhythm)
lexer = mpd.parser.Lexer(self.m_P.get_question()[qvar].m_musicdata)
x = len(lexer.m_string)
retval = []
while lexer.m_idx < x:
try:
toc, toc_data = lexer.get()
except mpd.MpdException, e:
e.m_lineno, e.m_linepos1, e.m_linepos2 = lexer.get_error_location()
e.m_mpd_varname = qvar
e.m_mpd_badcode = self.m_P.get_question()[qvar].get_err_context(e, self.m_P)
raise
if is_rhythm == 'rhythm':
if toc_data.m_pitch.get_octave_notename() == 'd':
continue
if toc_data.m_pitch.get_octave_notename() != 'c':
print "warning: Use only c and d for rhythm music objects"
retval.append(float(toc_data.m_duration.get_rat_value()) * self.m_P.get_tempo()[1] / self.m_P.get_tempo()[0] * 60)
return retval
def start_tapping(self):
self.m_taps = []
def tap(self):
self.m_taps.append(time.time())
def is_tap_complete(self):
"""
Return True if the user has tapped as many times as the
question requires.
"""
# A little abuse of get_timedelta_list, but this makes it simple.
return len(self.m_taps) == len(self.get_timedelta_list())
def get_score(self):
"""
Return a list of floats telling us how close the users answer was.
Each float is the timedelta of the question divided by the
timedelta of the answer.
If at_question_start == show, then the time between the first
and the second tap will set the tempo, and all the timedeltas will
be compared
"""
retval = []
question = self.get_timedelta_list()
if self.m_P.header.at_question_start == 'show':
# The user can tap in any tempo since he will only se the music.
# First we change the lists so that the time between the
# first two taps are 1.0, and the other proportionally to this.
question = [q/question[0] for q in question]
answer = []
for x, i in enumerate(self.m_taps[1:]):
answer.append(self.m_taps[x+1] - self.m_taps[x])
answer = [a/answer[0] for a in answer]
for idx in range(len(answer)):
retval.append(question[idx] / answer[idx])
else:
# Has to tap in the same tempo as the music played.
for x, i in enumerate(self.m_taps[1:]):
a = self.m_taps[x+1] - self.m_taps[x]
retval.append(a / question[x])
return retval
def get_answer_status(self):
"""
Will return a tuple (bool, string) where the bool is True if the
exercises is answered correctly enough. The string is a message
to the user describing how acourately the rhythm was tapped.
"""
score = self.get_score()
print "rhythmtapping score:", " ".join(["%.2f" % x for x in score])
s = ""
max_diff = 0.0
for f in score:
s = s + " %.2f" % f
max_diff = max(max_diff, abs(1.0-f))
if self.m_P.header.at_question_start == 'show':
# It is much easier to tap in your own tempo, so we have to
# require more aquracy.
limit = 0.05
else:
limit = 0.09
if max_diff < limit:
s = "OK: %.2f < %.2f" % (max_diff, limit)
else:
s = "Not good enough: %.2f > %.2f" % (max_diff, limit)
return (max_diff < limit, s)
class Gui(abstract.LessonbasedGui):
please_tap_str = _("Please tap the rhythm.")
def __init__(self, teacher, window):
abstract.Gui.__init__(self, teacher, window)
#
self.g_music_displayer = mpd.musicdisplayer.MusicDisplayer(None)
self.practise_box.pack_start(self.g_music_displayer, False)
#
self.g_tap = gu.bButton(self.practise_box, _("Tap here"), self.on_tap)
self.g_new = gu.bButton(self.action_area, _("_New"),
self.on_new_question)
self.g_play_music = gu.bButton(self.action_area, _("P_lay music"),
lambda w: self.run_exception_handled(self.m_t.m_P.play_question))
self.g_display_music = gu.bButton(self.action_area, _("_Display music"),
self.show_answer)
self.g_repeat = gu.bButton(self.action_area, _("_Repeat"),
self.on_repeat)
self.g_give_up = gu.bButton(self.action_area, _("_Give up"), self.on_give_up)
# Flashbar
self.g_flashbar = gu.FlashBar()
self.g_flashbar.show()
self.practise_box.pack_start(self.g_flashbar, False)
def on_new_question(self, widget=None):
def exception_cleanup():
self.m_t.end_practise()
self.g_tap.set_sensitive(False)
self.g_repeat.set_sensitive(False)
self.g_give_up.set_sensitive(False)
g = self.m_t.new_question()
if g == self.m_t.OK:
if self.m_t.m_P.header.have_music_displayer:
self.g_music_displayer.clear()
try:
self.do_at_question_start_show_play()
except Exception, e:
if not self.standard_exception_handler(e, exception_cleanup):
raise
else:
self.m_start_time = time.time()
self.g_flashbar.push(self.please_tap_str)
self.m_t.start_tapping()
self.g_new.set_sensitive(
not self.get_bool('config/picky_on_new_question'))
self.g_repeat.set_sensitive(True)
self.g_give_up.set_sensitive(True)
self.g_tap.set_sensitive(True)
self.g_tap.grab_focus()
self.g_play_music.set_sensitive(True)
self.g_display_music.set_sensitive(True)
elif g == self.m_t.ERR_PICKY:
self.g_flashbar.flash(_("You have to solve this question first."))
else:
assert g == self.m_t.ERR_NO_ELEMS
self.g_repeat.set_sensitive(False)
self.g_flashbar.flash(_("You have to configure this exercise properly"))
def on_give_up(self, widget):
self.g_new.set_sensitive(True)
self.g_new.grab_focus()
self.g_repeat.set_sensitive(False)
self.g_give_up.set_sensitive(False)
self.g_flashbar.clear()
self.g_tap.set_sensitive(False)
self.m_t.q_status = self.QSTATUS_GIVE_UP
def on_repeat(self, widget):
self.m_t.m_P.play_question()
self.g_tap.grab_focus()
def on_tap(self, widget=None):
self.g_flashbar.set(_("Tapping in progress..."))
self.m_t.tap()
try:
if self.m_t.is_tap_complete():
solved, msg = self.m_t.get_answer_status()
self.g_flashbar.pop()
if solved:
self.g_new.set_sensitive(True)
self.g_new.grab_focus()
self.g_tap.set_sensitive(False)
self.m_t.q_status = self.QSTATUS_SOLVED
else:
self.g_tap.grab_focus()
self.m_t.start_tapping()
self.g_flashbar.set(self.please_tap_str)
self.g_flashbar.flash(msg)
except Exception, e:
# We need to check for exceptions here because for each
# tap, solfege will parse a music string and compare the rhythm
# the user has tapped so far.
if not self.standard_exception_handler(e):
raise
def on_start_practise(self):
self.g_new.set_sensitive(True)
self.g_tap.set_sensitive(False)
self.g_repeat.set_sensitive(False)
self.g_give_up.set_sensitive(False)
self.show_hide_at_question_start_buttons()
self.g_play_music.set_sensitive(False)
self.g_display_music.set_sensitive(False)
if self.m_t.m_P.header.have_music_displayer:
self.g_music_displayer.show()
self.g_music_displayer.clear()
else:
self.g_music_displayer.hide()
self.g_flashbar.require_size([
self.please_tap_str,
])
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