Allow text to overflow without breaking / wrapping

[hassanshaikley]

#62 # What problem does this feature solve?

I want text to be able to overflow outside of the screen; that way I can create scrolling text.

I want text to scroll in like a marquee.

What is your proposed solution?

Allow it to be as wide as need be and just slide it over to the left continuously.

[axelson]

@boydm This might be another good issue to revisit. Here's an example scene that reproduces the text wrapping (which doesn't match the size of the view port):

defmodule Dash.Scene.Home do
  use Scenic.Scene
  require Logger

  alias Scenic.Graph

  import Scenic.Primitives
  @text_size 24

  def init(scene, _param, _opts) do
    {width, height} = scene.viewport.size

    graph =
      Graph.build(font: :roboto, font_size: @text_size)
      |> add_specs_to_graph([
        text_spec(
          "Very long text will wrap at some point. Is there a way to disable this? aa ab ac ad ae af ag ah ai aj ak al am an ao ap",
          translate: {20, 40 + @text_size}
        ),
        rect_spec({width, height})
      ])

    scene = push_graph(scene, graph)

    {:ok, scene}
  end


  def handle_input(event, _context, scene) do
    Logger.info("Received event: #{inspect(event)}")
    {:noreply, scene}
  end
end

And here's a screenshot rendered from the scene above:

[JediLuke]

The reason this happens is due to a hard-coded wrapping limit inside script.c, which is in the local driver - see here https://github.com/ScenicFramework/scenic_driver_local/blob/main/c_src/script.c#L216

If you clone the repo & set this limit to like 2000 (it's 1000 now) and recompile it, the wrapping limit goes away.

I am not sure what the best overall way to fix this is though, maybe it should be a compile option? Maybe we can pass it down as an argument?