# Window Children Example

An example of using children with a `Window` widget.

The `Window` widget serves as the fundamental top level widget for UIs in Enaml. `Window` widgets may have at most one child widget which must be an instance of `Container`. This `Container` is referred to as the ‘central widget’ of the UI. The sizing behavior of a `Window` is largely determined by the sizing constraints of the central widget.

In this example, we use a `Container` and a few `PushButton` widgets to add content to the `Window`. Clicking on the first `PushButton` will print the central widget of the window to the shell.

This example focuses on features of the `Window` widget, see the other examples for explanations of the other widgets and language features.

Tip

To see this example in action, download it from `window_children` and run:

    $ enaml-run window_children.enaml

## Screenshot

## Example Enaml Code

    #------------------------------------------------------------------------------
    # Copyright (c) 2013-2025, 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 of using children with a `Window` widget.

    The `Window` widget serves as the fundamental top level widget for UIs
    in Enaml. `Window` widgets may have at most one child widget which must
    be an instance of `Container`. This `Container` is referred to as the
    'central widget' of the UI. The sizing behavior of a `Window` is largely
    determined by the sizing constraints of the central widget.

    In this example, we use a `Container` and a few `PushButton` widgets to
    add content to the `Window`. Clicking on the first `PushButton` will
    print the central widget of the window to the shell.

    This example focuses on features of the `Window` widget, see the other
    examples for explanations of the other widgets and language features.

    << autodoc-me >>
    """
    from __future__ import print_function
    from enaml.widgets.api import Window, Container, PushButton

    enamldef Main(Window): main:
        title = 'Hello World!'
        Container:
            PushButton:
                text = 'Foo'
                clicked :: print(main.central_widget())
            PushButton:
                text = 'Bar'
            PushButton:
                text = 'Baz'