def build_cocktail_buttons(self, menu):
for key, recipe in menu.items():
b = ToggleButton(text=recipe.name,
size_hint=(1 / MENU_COLS, 1 / MENU_ROWS),
halign='center',
group='recipe',
allow_no_selection=False,
on_press=lambda b: self.stage_recipe(b.recipe))
b.recipe = recipe
# set text width to 85% of the button width
b.bind(width=lambda bt, w: setattr(bt, 'text_size', (w*.85, None)))
self.menu_buttons.add_widget(b)
self.stage_recipe(self.menu_buttons.children[-1].recipe)
self.menu_buttons.children[-1].state = 'down'
