Override Layout Constraints Example
An example which demonstrates overriding layout_constraints
.
This example shows how one can override layout_constraints
method from
enaml syntax to generate custom constraints using procedural code. This
can be useful for complex layout scenarios where generating constraints
from a single expression would be difficult or impossible.
Tip
To see this example in action, download it from
override_layout_constraints
and run:
$ enaml-run override_layout_constraints.enaml
Screenshot

Example Enaml Code
#------------------------------------------------------------------------------
# Copyright (c) 2015, Nucleic Development Team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file LICENSE, distributed with this software.
#------------------------------------------------------------------------------
""" An example which demonstrates overriding `layout_constraints`.
This example shows how one can override `layout_constraints` method from
enaml syntax to generate custom constraints using procedural code. This
can be useful for complex layout scenarios where generating constraints
from a single expression would be difficult or impossible.
<< autodoc-me >>
"""
from itertools import zip_longest
from enaml.layout.api import align, grid
from enaml.widgets.api import Window, Container, Field, Label, PushButton
enamldef Main(Window):
title = 'Custom Constraints'
Container:
layout_constraints => ():
rows = []
widgets = self.visible_widgets()
row_iters = (iter(widgets),) * 2
rows = list(zip_longest(*row_iters))
return [grid(*rows)] + [align('v_center', *row) for row in rows]
Label:
text = 'Name'
Field:
pass
Label:
text = 'Surname'
Field:
pass
PushButton:
text = 'Click me'