Align Offset Example¶

#------------------------------------------------------------------------------
# Copyright (c) 2013, Nucleic Development Team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file COPYING.txt, distributed with this software.
#------------------------------------------------------------------------------
""" An example of the `align` layout helper with inter-element offsets.

This is example is nearly identical to the `align.enaml` example. This
example adds to the other by showing how the `align` layout helper
accepts spacing offsets for its layout items.

<< autodoc-me >>
"""
from enaml.layout.api import align
from enaml.widgets.api import Window, Container, Field, PushButton


enamldef Main(Window):
    Container:
        constraints = [
            # Align the left edges of both PushButtons with a relative
            # offset between them.
            align('left', pb1, 20, pb2),

            # Align the top button with the center of the field with
            # a relative offset between them.
            align('h_center', fld, 50, pb1),

            # Pin the Field to the top of the Container. This is
            # orthogonal to the use of `align` for this example,
            # but is needed to have a well constrained system.
            contents_top == fld.top, contents_left == fld.left,
            contents_right == fld.right,

            # Setup the vertical constraints for the widgets. This is
            # orthogonal to the use of `align` for this example, but
            # is needed to have a well constrained system.
            fld.bottom + 10 == pb1.top, pb1.bottom + 10 == pb2.top,
            pb2.bottom <= contents_bottom,
        ]
        Field: fld:
            pass
        PushButton: pb1:
            text = 'Long Name Foo'
        PushButton: pb2:
            text = 'Bar'