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# GNU Solfege - free ear training software
# Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 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 gtk
import gu
import mpd, mpd.musicdisplayer
import abstract, lessonfile
from mpd.rat import Rat
import soundcard
import utils
class Teacher(abstract.Teacher):
"""
The Teacher and Gui for dictation abuses q_status a little.
QSTATUS_NEW mean that the lessonfile is ok.
QSTATUS_NO mean that the question is corrupt and unusable. Other
questions in the same file might be useable.
"""
def __init__(self, exname, app):
abstract.Teacher.__init__(self, exname, app)
self.lessonfileclass = lessonfile.DictationLessonfile
class Gui(abstract.LessonbasedGui):
def __init__(self, teacher, window):
abstract.LessonbasedGui.__init__(self, teacher, window, no_notebook=1)
################
# practise_box #
################
self.g_question_title = gu.bLabel(self.practise_box, "", False, False)
self.g_music_displayer = mpd.musicdisplayer.MusicDisplayer(utils.play_tone)
self.set_size_request(500, -1)
self.g_music_displayer.show()
self.practise_box.pack_start(self.g_music_displayer)
###############
# action_area #
###############
self.g_partbox = gu.bHBox(self.practise_box, False)
self.g_go_back = gtk.Button(stock='gtk-go-back')
self.g_go_back.connect('clicked', self.select_previous)
self.g_go_back.show()
self.g_go_back.get_children()[0].get_children()[0].get_children()[1].hide()
self.action_area.pack_start(self.g_go_back, False)
self.g_go_forward = b = gtk.Button(stock='gtk-go-forward')
self.g_go_forward.show()
self.g_go_forward.connect('clicked', self.select_next)
self.g_go_forward.get_children()[0].get_children()[0].get_children()[1].hide()
self.action_area.pack_start(self.g_go_forward, False)
self.g_play = gu.bButton(self.action_area, _("_Play the whole music"),
self.play)
self.g_show = gu.bButton(self.action_area, _("_Show"), self.show_answer)
def exception_cleanup(self):
""" cleanup function after exception caught in select_previous
and select_next
"""
soundcard.synth.stop()
self.m_t.q_status = self.QSTATUS_NO
self.g_play.set_sensitive(False)
self.g_show.set_sensitive(False)
self.g_music_displayer.clear()
def select_previous(self, widget):
self.m_t.m_P.select_previous()
try:
self.display_start_of_music()
except Exception, e:
if not self.standard_exception_handler(e, self.exception_cleanup):
raise
else:
self.m_t.q_status = self.QSTATUS_NEW
self.g_play.set_sensitive(True)
self.g_show.set_sensitive(True)
self._update()
def select_next(self, widget):
self.m_t.m_P.select_next()
try:
self.display_start_of_music()
except Exception, e:
if not self.standard_exception_handler(e, self.exception_cleanup):
raise
else:
self.m_t.q_status = self.QSTATUS_NEW
self.g_play.set_sensitive(True)
self.g_show.set_sensitive(True)
self._update()
def play(self, widget=None):
# see Teacher docstring.
if self.m_t.q_status != self.QSTATUS_NEW:
return
if not self.m_t.m_P:
return
try:
self.m_t.m_P.play_question()
except Exception, e:
if not self.standard_exception_handler(e, soundcard.synth.stop):
raise
def on_end_practise(self):
self.m_t.end_practise()
def show_answer(self, widget=None):
# see Teacher docstring.
if self.m_t.q_status != self.QSTATUS_NEW:
return
if not self.m_t.m_P:
return
try:
self.g_music_displayer.display(self.m_t.m_P.get_music(),
self.get_int('config/feta_font_size=20'))
except Exception, e:
if not self.standard_exception_handler(e):
raise
def _update(self):
"""
Updates the buttons above the action_area where you have
one or more buttons with a small note pixmap on. Each of the
buttons will play one part of the music in the question.
"""
# tmp func used as callback function
def f(w, start, end, self=self):
try:
mpd.play_music3(self.m_t.m_P.get_music(),
self.m_t.m_P.get_tempo(),
self.m_t.m_P.prepare_instrument_list(self.m_t.m_P.get_question()),
start, end)
except Exception, e:
if not self.standard_exception_handler(e, soundcard.synth.stop):
raise
for i in self.g_partbox.get_children():
i.destroy()
# if the lessonfile was invalid, m_P could be None
if self.m_t.m_P and self.m_t.m_P.m_questions:
if 'name' in self.m_t.m_P.get_question():
self.g_question_title.set_text(self.m_t.m_P.get_name())
else:
self.g_question_title.set_text("")
v = self.m_t.m_P.get_breakpoints()
if v == []:
# we display one button that will play the whole music if
# there are not breakpoints in the music
btn = self.create_pixmap_button()
btn.connect('clicked', f, None, None)
btn.show()
self.g_partbox.pack_start(btn)
return
tmp = [Rat(0, 1)] + v + [Rat(2**30, 1)]
for i in range(len(tmp) - 1):
btn = self.create_pixmap_button()
btn.show()
btn.connect('clicked', f, tmp[i], tmp[i+1])
self.g_partbox.pack_start(btn)
# q_status is QSTATUS_NO if the question is invalid (from the lessonfile)
if self.m_t.q_status == self.QSTATUS_NO:
self.g_partbox.set_sensitive(False)
else:
self.g_partbox.set_sensitive(True)
def display_start_of_music(self):
"""
Callers must catch exceptions.
"""
fontsize = self.get_int('config/feta_font_size=20')
try:
if self.m_t.m_P.get_clue_music():
self.g_music_displayer.display(self.m_t.m_P.get_clue_music().get_mpd_music_string(self.m_t.m_P), fontsize)
elif self.m_t.m_P.get_clue_end():
self.g_music_displayer.display_range(self.m_t.m_P.get_music(),
fontsize, Rat(0, 1), self.m_t.m_P.get_clue_end())
else:
self.g_music_displayer.display(self.m_t.m_P.get_music(),
fontsize, mpd.FIRST)
except Exception, e:
if self.m_t.m_P.get_clue_music():
e.m_mpd_varname = 'clue_music'
else:
e.m_mpd_varname = 'music'
if isinstance(e, mpd.MpdException):
if 'm_mpd_badcode' not in dir(e):
e.m_mpd_badcode = self.m_t.m_P.get_question()[e.m_mpd_varname].get_err_context(e, self.m_t.m_P)
raise
def update_gui_after_lessonfile_change(self):
self.m_t.q_status = self.QSTATUS_NEW
if not self.m_t.m_P.m_questions:
self.g_win.display_error_message(_("The lesson file '%s' contains no questions.") % self.m_t.m_lessonfile)
self.g_play.set_sensitive(False)
self.g_show.set_sensitive(False)
self.g_go_back.set_sensitive(False)
self.g_go_forward.set_sensitive(False)
self._update()
return
else:
self.g_go_forward.set_sensitive(True)
self.g_go_back.set_sensitive(True)
self.m_t.m_P.select_first()
self.action_area.set_sensitive(True)
try:
self.display_start_of_music()
except Exception, e:
def cleanup_function():
self.m_t.q_status = self.QSTATUS_NO
self.g_play.set_sensitive(False)
self.g_show.set_sensitive(False)
self.g_music_displayer.clear()
if not self.standard_exception_handler(e, cleanup_function):
raise
else:
self.g_play.set_sensitive(True)
self.g_show.set_sensitive(True)
self._update()
def create_pixmap_button(self):
im = gtk.Image()
im.set_from_stock("solfege-rhythm-c4", gtk.ICON_SIZE_LARGE_TOOLBAR)
im.show()
btn = gtk.Button()
btn.add(im)
return btn
def on_start_practise(self):
self.update_gui_after_lessonfile_change()
self.g_play.grab_focus()
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