:date: 2018-02-08

==========================
Thursday, February 8, 2018
==========================

Tonis showed me a next series of progresses with the new OpenUI5
interface.  It continues to look promising!

The next thing to do are the detail windows.  OpenUI5 has more
possibilities than ExtJS, but in a first step we will just continue to
use Lino's traditional layout concept and render it using `nested
flexboxes
<https://openui5.hana.ondemand.com/#/sample/sap.m.sample.FlexBoxNested/preview>`__.


>>> from lino import startup
>>> startup('lino_book.projects.min1.settings')
>>> from lino.api.doctest import *

>>> a = rt.models.users.UsersOverview.sign_in.__class__
>>> a
<class 'lino.modlib.users.actions.SignIn'>

The dialog window for this action is available at the
:attr:`params_layout` attribute:

>>> a.params_layout.__class__
<class 'lino.core.layouts.Panel'>

which alwais has at least one element called `main`:

>>> a.params_layout.main
'\n    username\n    password\n    '

You can get the layout handle for this main element:

>>> lh = rt.models.users.UsersOverview.sign_in.params_layout.get_layout_handle(settings.SITE.kernel.default_ui)

and that element has itself 2 children:

>>> len(lh.main.elements)
2
>>> for e in lh.main.elements:
...     print(repr(e.wrapped))
<CharFieldElement username in lino.core.layouts.ActionParamsLayout on <lino.modlib.users.actions.SignIn sign_in ('Sign in')>>
<PasswordFieldElement password in lino.core.layouts.ActionParamsLayout on <lino.modlib.users.actions.SignIn sign_in ('Sign in')>>