ae.kivy.i18n

ae.kivy.i18n module

this module is adding translatable f-strings to the python and kv code of your app, via the helper function get_txt() and the _GetTextBinder class.

Module Attributes

get_txt

class _GetTextBinder

Bases: Observable

redirect ae.i18n.get_f_string() to an instance of this class.

kivy currently only support a single one automatic binding in kv files for all function names ending with _ (see watched_keys extension in kivy/lang/parser.py line 201; e.g. f_ would get recognized by the lang_tr re pattern, but kivy will only add the _ symbol to watched_keys and therefore f_ not gets bound.) to allow both - f-strings and simple get_text messages - this module binds ae.i18n.get_f_string() to the get_txt symbol (instead of ae.i18n.get_text()).

get_txt can be used as the translation callable, but also to switch the current default language. additionally, get_txt is implemented as an observer that automatically updates any translations messages of all active/visible kv rules on switch of the language at app run-time.

inspired by (see also discussion at https://github.com/kivy/kivy/issues/1664):

• https://github.com/tito/kivy-gettext-example

• https://github.com/Kovak/kivy_i18n_test

• https://git.bluedynamics.net/phil/woodmaster-trainer/-/blob/master/src/ui/kivy/i18n.py

observers: list[tuple[Callable, tuple, dict]] = []

list of bound observer tuples (func, args, kwargs)

_bound_uid = -1

fbind(name, func, *args, **kwargs)

override fbind (fast bind) from Observable to collect and separate _ bindings.

Parameters:

• name (str) – attribute name to be bound.

• func (Callable) – observer notification function (to be called if the attribute changes).

• args – args to be passed to the observer.

• kwargs – kwargs to be passed to the observer.

Return type:

int

Returns:

unique id of this binding.

funbind(name, func, *args, **kwargs)

override fast unbind.

Parameters:

• name (str) – bound attribute name.

• func (Callable) – observer notification function (called if attribute changed).

• args – args to be passed to the observer.

• kwargs – kwargs to be passed to the observer.

switch_lang(lang_code)

change language and update kv rules properties.

Parameters:

lang_code (str) – language code to switch this app to.

__call__(text, count=None, language='', loc_vars=None, **kwargs)

translate text into the current-default or the passed language.

Parameters:

• text (str) – text to translate.

• count (Optional[int]) – optional count for pluralization.

• language (str) – language code to translate the passed text to (def=current default language).

• loc_vars (Optional[dict[str, Any]]) – local variables used in the conversion of the f-string expression to a string. the count item of this dict will be overwritten by the value of the count parameter (if this argument got specified).

• kwargs – extra kwargs (for example, glo_vars or key_suffix - see get_f_string()).

Return type:

str

Returns:

translated text.