Reaction::UI::Window

Reaction::UI::Window is a Perl container designed to render user interface elements. It is easy to implement using code like:

```my $window = Reaction::UI::Window->new(
ctx => $ctx,
view_name => $view_name,
content_type => $content_type,
title => $window_title,
);```

Commonly, however, the Root Controller creates a Window object for you:

```my $window = $ctx->stash->{window};```

Once you have created or retrieved a Window object, you can resolve current events and render the view of UI elements by calling the `flush()` function.

If you only want to resolve events, you can call `flush_events()`, and if you only want to render the top ViewPort in the FocusStack of the Window, you can call `flush_view()`.

If you want to render a specific ViewPort, you can use this function:

```$window->render_viewport($viewport);```

You can also add a ViewPort to the UI using:

```$window->focus_stack->push_viewport('Reaction::UI::ViewPort');```

Overall, the Window object is designed to contain all the ViewPorts and UI elements and can be easily rendered in the end action of the Root Controller to create a complete web page.