class LetterMatch(activity.Activity):
''' Learning the alphabet.
Level1: A letter card and six picture cards appear; the user
listens to the name of letter and then selects the matching picture.
Level2: A picture card and six letter cards appear; the user
listens to the name of the picture and then selects the matching letter.
Customization toolbar allows loading of new images and sounds.
'''
def __init__(self, handle):
''' Initialize the toolbars and the reading board '''
super(LetterMatch, self).__init__(handle)
self.datapath = get_path(activity, 'instance')
self.image_id = None
self.audio_id = None
if 'LANG' in os.environ:
language = os.environ['LANG'][0:2]
elif 'LANGUAGE' in os.environ:
language = os.environ['LANGUAGE'][0:2]
else:
language = 'es' # default to Spanish
# FIXME: find some reasonable default situation
language = 'es'
self.letter = None
self.activity_path = activity.get_bundle_path()
self._lessons_path = os.path.join(self.activity_path, 'lessons',
language)
self._images_path = os.path.join(self.activity_path, 'images',
language)
self._sounds_path = os.path.join(self.activity_path, 'sounds',
language)
self.data_from_journal = {}
if 'data_from_journal' in self.metadata:
self.data_from_journal = json.loads(
str(self.metadata['data_from_journal']))
self._setup_toolbars()
self.canvas = Gtk.DrawingArea()
self.canvas.set_size_request(Gdk.Screen.width(), Gdk.Screen.height())
self.canvas.modify_bg(Gtk.StateType.NORMAL, Gdk.color_parse("#000000"))
self.canvas.show()
self.set_canvas(self.canvas)
self.mode = 'letter'
self._page = Page(self.canvas,
self._lessons_path,
self._images_path,
self._sounds_path,
parent=self)
def _setup_toolbars(self):
self.max_participants = 1 # no sharing
toolbox = ToolbarBox()
activity_button = ActivityToolbarButton(self)
toolbox.toolbar.insert(activity_button, 0)
activity_button.show()
separator = Gtk.SeparatorToolItem()
toolbox.toolbar.insert(separator, -1)
self.set_toolbar_box(toolbox)
toolbox.show()
primary_toolbar = toolbox.toolbar
custom_toolbar = ToolbarBox()
self.custom_toolbar_button = ToolbarButton(icon_name='view-source',
page=custom_toolbar)
self.custom_toolbar_button.connect('clicked',
self._customization_toolbar_cb)
toolbox.toolbar.insert(self.custom_toolbar_button, -1)
button = radio_factory('letter',
primary_toolbar,
self._letter_cb,
tooltip=_('listen to the letter names'))
radio_factory('picture',
primary_toolbar,
self._picture_cb,
tooltip=_('listen to the letter names'),
group=button)
self.status = label_factory(primary_toolbar, '', width=300)
self.letter_entry = None
self.image_button = button_factory('load_image_from_journal',
custom_toolbar.toolbar,
self._choose_image_from_journal_cb,
tooltip=_("Import Image"))
self.sound_button = button_factory('load_audio_from_journal',
custom_toolbar.toolbar,
self._choose_audio_from_journal_cb,
tooltip=_("Import Audio"))
container = Gtk.ToolItem()
self.letter_entry = Gtk.Entry()
self.letter_entry.set_max_length(1)
self.letter_entry.set_width_chars(3) # because 1 char looks funny
self.letter_entry.connect('changed', self._set_letter)
self.letter_entry.set_sensitive(False)
self.letter_entry.show()
container.add(self.letter_entry)
container.show_all()
custom_toolbar.toolbar.insert(container, -1)
self.add_button = button_factory('list-add',
custom_toolbar.toolbar,
self._copy_to_journal,
tooltip=_("Add"))
self.add_button.set_sensitive(False)
separator_factory(primary_toolbar, True, False)
stop_button = StopButton(self)
stop_button.props.accelerator = '<Ctrl>q'
toolbox.toolbar.insert(stop_button, -1)
stop_button.show()
def _set_letter(self, event):
''' Process letter in text entry '''
text = self.letter_entry.get_text().strip()
if text and len(text) > 0:
if len(text) != 1:
text = text[0].upper()
text = text.upper()
self.letter_entry.set_text(text)
self.letter = text
if self.letter in self.data_from_journal:
self.data_from_journal[self.letter].append(
(self.image_id, self.audio_id))
else:
self.data_from_journal[self.letter] = \
[(self.image_id, self.audio_id)]
self.add_button.set_sensitive(True)
else:
self.letter = None
self.add_button.set_sensitive(False)
def _copy_to_journal(self, event):
''' Callback from add button on customization toolbar '''
# Save data to journal and load it into the card database
self.metadata['data_from_journal'] = json.dumps(self.data_from_journal)
self._page.load_from_journal(self.data_from_journal)
# Reinit the preview, et al. after add
self.preview_image.hide()
self._init_preview()
self.image_id = None
self.object_id = None
self.letter_entry.set_text('')
self.letter_entry.set_sensitive(False)
self.add_button.set_sensitive(False)
def _init_preview(self):
''' Set up customization toolbar, preview image '''
w = int(self._page._card_width)
h = int(self._page._card_height)
x = int(self._page._grid_x_offset + w + 12)
y = int(self._page._grid_y_offset + 40)
pixbuf = GdkPixbuf.Pixbuf.new_from_file_at_size(
os.path.join(self._images_path, '../drawing.png'), w, h)
self.status.set_text(
_('Please choose image and audio objects from the Journal.'))
self._page._hide_cards()
if not hasattr(self, 'preview_image'):
self.preview_image = Sprite(self._page._sprites, 0, 0, pixbuf)
else:
self.preview_image.set_image(pixbuf)
self.preview_image.move((x, y))
self.preview_image.set_layer(100)
self._page._canvas.disconnect(self._page.button_press_event_id)
self._page._canvas.disconnect(self._page.button_release_event_id)
self._page.button_press_event_id = \
self._page._canvas.connect('button-press-event',
self._preview_press_cb)
self._page.button_release_event_id = \
self._page._canvas.connect('button-release-event',
self._dummy_cb)
def _customization_toolbar_cb(self, event):
''' Override toolbar button behavior '''
if self.custom_toolbar_button.is_expanded():
self._init_preview()
else:
if self.mode == 'letter':
self._letter_cb()
else:
self._picture_cb()
def _preview_press_cb(self, win, event):
''' Preview image was clicked '''
self._choose_image_from_journal_cb(None)
def _dummy_cb(self, win, event):
'''Does nothing'''
return True
def _choose_audio_from_journal_cb(self, event):
''' Create a chooser for audio objects '''
self.add_button.set_sensitive(False)
self.letter_entry.set_sensitive(False)
self.image_button.set_sensitive(False)
self.sound_button.set_sensitive(False)
self.audio_id = None
chooser = ObjectChooser(what_filter=mime.GENERIC_TYPE_AUDIO)
result = chooser.run()
if result == Gtk.ResponseType.ACCEPT:
jobject = chooser.get_selected_object()
self.audio_id = str(jobject._object_id)
self.image_button.set_sensitive(True)
self.sound_button.set_sensitive(True)
if self.image_id and self.audio_id:
self.letter_entry.set_sensitive(True)
self._page._canvas.disconnect(self._page.button_press_event_id)
self._page.button_press_event_id = \
self._page._canvas.connect('button-press-event',
self._play_audio_cb)
def _play_audio_cb(self, win, event):
''' Preview audio '''
if self.audio_id:
play_audio_from_file(datastore.get(self.audio_id).get_file_path())
def _choose_image_from_journal_cb(self, event):
''' Create a chooser for image objects '''
self.add_button.set_sensitive(False)
self.letter_entry.set_sensitive(False)
self.image_button.set_sensitive(False)
self.sound_button.set_sensitive(False)
self.image_id = None
chooser = ObjectChooser(what_filter=mime.GENERIC_TYPE_IMAGE)
result = chooser.run()
if result == Gtk.ResponseType.ACCEPT:
jobject = chooser.get_selected_object()
self.image_id = str(jobject._object_id)
x = self._page._grid_x_offset + self._page._card_width + 12
y = self._page._grid_y_offset + 40
w = self._page._card_width
h = self._page._card_height
pixbuf = GdkPixbuf.Pixbuf.new_from_file_at_size(
jobject.get_file_path(), w, h)
self.preview_image.set_image(pixbuf)
self.preview_image.move((x, y))
self.preview_image.set_layer(100)
self.image_button.set_sensitive(True)
self.sound_button.set_sensitive(True)
if self.image_id and self.audio_id:
self.letter_entry.set_sensitive(True)
self._page._canvas.disconnect(self._page.button_press_event_id)
self._page.button_press_event_id = \
self._page._canvas.connect('button-press-event',
self._play_audio_cb)
def _cleanup_preview(self):
''' No longer previewing, so hide image and clean up callbacks '''
if hasattr(self, 'preview_image'):
self.preview_image.hide()
self._page._canvas.disconnect(self._page.button_press_event_id)
self._page._canvas.disconnect(self._page.button_release_event_id)
self._page.button_press_event_id = \
self._canvas.connect("button-press-event",
self._page._button_press_cb)
self._page.button_release_event_id = \
self._canvas.connect("button-release-event",
self._page._button_release_cb)
def _letter_cb(self, event=None):
''' Click on card to hear the letter name '''
if self.custom_toolbar_button.is_expanded():
self.custom_toolbar_button.set_expanded(False)
self._cleanup_preview()
self.mode = 'letter'
self.status.set_text(
_('Click on the picture that matches the letter.'))
if hasattr(self, '_page'):
self._page.new_page()
return
def _picture_cb(self, event=None):
''' Click on card to hear the letter name '''
if self.custom_toolbar_button.is_expanded():
self.custom_toolbar_button.set_expanded(False)
self._cleanup_preview()
self.mode = 'picture'
self.status.set_text(
_('Click on the letter that matches the picture.'))
if hasattr(self, '_page'):
self._page.new_page()
return
def write_file(self, file_path):
''' Write status to the Journal '''
if not hasattr(self, '_page'):
return
self.metadata['page'] = str(self._page.current_card)
