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# Copyright 2015 Canonical, Ltd.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
""" UI utilities """
from urwid import Padding as _Padding
from urwid import AttrMap, Text
from functools import partialmethod
from subiquitycore.palette import STYLES
def apply_padders(cls):
""" Decorator for generating useful padding methods
Loops through and generates methods like:
Padding.push_1(Widget)
Sets the left padding attribute by 1
Padding.pull_24(Widget)
Sets right padding attribute by 24.
Padding.center_50(Widget)
Provides center padding with a relative width of 50
"""
padding_count = 100
for i in range(1, padding_count):
setattr(cls, 'push_{}'.format(i), partialmethod(_Padding, left=i))
setattr(cls, 'pull_{}'.format(i), partialmethod(_Padding, right=i))
setattr(cls, 'fixed_{}'.format(i),
partialmethod(_Padding, align='center',
width=i, min_width=i))
setattr(cls, 'center_{}'.format(i),
partialmethod(_Padding, align='center',
width=('relative', i)))
setattr(cls, 'left_{}'.format(i),
partialmethod(_Padding, align='left',
width=('relative', i)))
setattr(cls, 'right_{}'.format(i),
partialmethod(_Padding, align='right',
width=('relative', i)))
return cls
@apply_padders
class Padding:
""" Padding methods
.. py:meth:: push_X(:class:`urwid.Widget`)
This method supports padding the left side of the widget
from 1-99, for example:
.. code::
Padding.push_20(Text("This will be indented 20 columns")
.. py:meth:: pull_X(:class:`urwid.Widget`)
This method supports padding the right side of the widget
from 1-99, for example:
.. code::
Padding.pull_20(Text("This will be right indented 20 columns")
.. py:meth:: fixed_X(:class:`urwid.Widget`)
This method supports padding the widget to a fixed size and
centering it.
from 1-99, for example:
.. code::
Padding.fixed_20(Text("This will be centered and fixed sized
of 20 columns"))
.. py:meth:: center_X(:class:`urwid.Widget`)
This method centers a widget with X being the relative width of
the widget.
.. code::
Padding.center_10(Text("This will be centered with a "
"width of 10 columns"))
.. py:meth:: left_X(:class:`urwid.Widget`)
This method aligns a widget left with X being the relative width of
the widget.
.. code::
Padding.left_10(Text("This will be left aligned with a "
"width of 10 columns"))
.. py:meth:: right_X(:class:`urwid.Widget`)
This method right aligns a widget with X being the relative width of
the widget.
.. code::
Padding.right_10(Text("This will be right aligned with a "
"width of 10 columns"))
"""
line_break = partialmethod(Text)
def apply_style_map(cls):
""" Applies AttrMap attributes to Color class
Eg:
Color.frame_header(Text("I'm text in the Orange frame header"))
Color.body(Text("Im text in wrapped with the body color"))
"""
style_names = set()
for k in STYLES:
style_names.add(k[0])
for k in STYLES:
kf = k[0] + ' focus'
if k[0] + ' focus' in style_names:
setattr(cls, k[0], partialmethod(AttrMap, attr_map=k[0], focus_map=kf))
else:
setattr(cls, k[0], partialmethod(AttrMap, attr_map=k[0]))
return cls
@apply_style_map
class Color:
""" Partial methods for :class:`~subiquity.palette.STYLES`
.. py:meth:: frame_header(:class:`urwid.Widget`)
This method colors widget based on the style map used.
.. code::
Color.frame_header(Text("This will use foreground and background "
"defined from the STYLES attribute"))
"""
pass
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