minimum viable user interaction system

.formatter.exs

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+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]

.gitignore

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+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where 3rd-party dependencies like ExDoc output generated docs.
+/doc/
+
+# Ignore .fetch files in case you like to edit your project deps locally.
+/.fetch
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+foo-*.tar
+
+
+# Ignore scripts marked as secret - usually passwords and such in config files
+*.secret.exs
+*.secrets.exs

README.md

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+Readme text goes here
+
+
+From template

config/config.exs

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+# This file is responsible for configuring your application
+# and its dependencies with the aid of the Mix.Config module.
+use Mix.Config
+
+# Configure the main viewport for the Scenic application
+config :beepboop, :viewport, [
+  name: :main_viewport,
+  size: {700, 600},
+  default_scene: {Beepboop.Scene.Home, nil},
+  drivers: [
+    [
+      module: Scenic.Driver.Local,
+      name: :local
+      # opts: [resizeable: true, title: "beepboop"]
+    ]
+  ]
+]
+
+config :scenic, :assets, module: Beepboop.Assets
+
+# It is also possible to import configuration files, relative to this
+# directory. For example, you can emulate configuration per environment
+# by uncommenting the line below and defining dev.exs, test.exs and such.
+# Configuration from the imported file will override the ones defined
+# here (which is why it is important to import them last).
+#
+#     import_config "prod.exs"

lib/assets.ex

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+defmodule Beepboop.Assets do
+  use Scenic.Assets.Static, otp_app: :beepboop
+end

lib/beepboop.ex

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+defmodule Beepboop do
+  @moduledoc """
+  Starter application using the Scenic framework.
+  """
+
+  def start(_type, _args) do
+    # load the viewport configuration from config
+    main_viewport_config = Application.get_env(:beepboop, :viewport)
+
+    # start the application with the viewport
+    children = [
+      {Scenic, [main_viewport_config]}
+    ]
+
+    Supervisor.start_link(children, strategy: :one_for_one)
+  end
+end

lib/scenes/home.ex

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+defmodule Beepboop.Scene.Home do
+  use Scenic.Scene
+
+  require Logger
+
+  # alias Scenic.Graph
+  # alias Scenic.ViewPort
+
+  import Scenic.Primitives
+  import Scenic.Components
+  import Scenic.Graph
+  
+  # ============================================================================
+  # setup
+
+  # --------------------------------------------------------
+  def init(scene, _params, _opts) do
+    graph = Scenic.Graph.build(font: :roboto)
+    |> text("Hello worl", id: :text)
+    |> button("OK", id: :push_me)
+
+    scene = assign(scene, some_state: 123, graph: graph)
+    |> push_graph(graph)
+
+    {:ok, scene}
+  end
+
+  
+  # display any received events
+  def handle_event(event, _,  %{assigns: %{graph: graph}} = scene) do
+    IO.puts inspect event
+    
+    graph = Scenic.Graph.modify( graph, :text, &text(&1, inspect(event)))
+      
+    scene =
+      scene
+    |> assign( graph: graph )
+    |> push_graph( graph )
+    
+    {:noreply, scene}
+  end
+  
+  
+end

mix.exs

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+defmodule Beepboop.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :beepboop,
+      version: "0.1.0",
+      elixir: "~> 1.7",
+      build_embedded: true,
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      mod: {Beepboop, []},
+      extra_applications: [:crypto]
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      {:scenic, "~> 0.11.0-beta.0"},
+      {:scenic_driver_local, "~> 0.11-beta.0"}
+    ]
+  end
+end

mix.lock

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+%{
+  "elixir_make": {:hex, :elixir_make, "0.6.3", "bc07d53221216838d79e03a8019d0839786703129599e9619f4ab74c8c096eac", [:mix], [], "hexpm", "f5cbd651c5678bcaabdbb7857658ee106b12509cd976c2c2fca99688e1daf716"},
+  "ex_image_info": {:hex, :ex_image_info, "0.2.4", "610002acba43520a9b1cf1421d55812bde5b8a8aeaf1fe7b1f8823e84e762adb", [:mix], [], "hexpm", "fd1a7e02664e3b14dfd3b231d22fdd48bd3dd694c4773e6272b3a6228f1106bc"},
+  "font_metrics": {:hex, :font_metrics, "0.5.1", "10ce0b8b1bf092a2d3d307e05a7c433787ae8ca7cd1f3cf959995a628809a994", [:mix], [{:nimble_options, "~> 0.3", [hex: :nimble_options, repo: "hexpm", optional: false]}], "hexpm", "192e4288772839ae4dadccb0f5b1d5c89b73a0c3961ccea14b6181fdcd535e54"},
+  "input_event": {:hex, :input_event, "0.4.3", "ea1c6c81fd245f617858294ce106bf4b9c35822eaa94793ffa104cc0ae1bd323", [:make, :mix], [{:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "818bd6b20d3a6ccac868074138eae5dbae17baf2f7711b2852253d6461ad80db"},
+  "nimble_options": {:hex, :nimble_options, "0.3.7", "1e52dd7673d36138b1a5dede183b5d86dff175dc46d104a8e98e396b85b04670", [:mix], [], "hexpm", "2086907e6665c6b6579be54ef5001928df5231f355f71ed258f80a55e9f63633"},
+  "scenic": {:hex, :scenic, "0.11.0-beta.0", "e753ebfa61eaa060810831be0eb346c544f345d47d53d12c2f58f1614e66bfa2", [:make, :mix], [{:elixir_make, "~> 0.6.2", [hex: :elixir_make, repo: "hexpm", optional: false]}, {:ex_image_info, "~> 0.2.4", [hex: :ex_image_info, repo: "hexpm", optional: false]}, {:font_metrics, "~> 0.5.0", [hex: :font_metrics, repo: "hexpm", optional: false]}, {:nimble_options, "~> 0.3.4", [hex: :nimble_options, repo: "hexpm", optional: false]}, {:truetype_metrics, "~> 0.5", [hex: :truetype_metrics, repo: "hexpm", optional: false]}], "hexpm", "cace35efcc1d8e914f03abad5677ebd4d648be1cbd04d93c4af0d97a5c2df722"},
+  "scenic_driver_local": {:hex, :scenic_driver_local, "0.11.0-beta.0", "da8c58b60346daf51d6c0133e7b296f851d97fe86a5d0988bff99f8ae19ff186", [:make, :mix], [{:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}, {:input_event, "~> 0.4", [hex: :input_event, repo: "hexpm", optional: false]}, {:scenic, "~> 0.11.0-beta.0", [hex: :scenic, repo: "hexpm", optional: false]}], "hexpm", "8812762a9721c73a5ee4c306f6ea1eafa7bd1de6997709f9e1243f734610f780"},
+  "truetype_metrics": {:hex, :truetype_metrics, "0.6.0", "683765005d6c4b4df2452459e3fc2310a037fea183caa3cbdc3d564b22fb2119", [:mix], [{:font_metrics, "~> 0.5", [hex: :font_metrics, repo: "hexpm", optional: false]}], "hexpm", "e252d5ff51ed736c446ad4f7d9b2be72d915e3d8107c337b1c914ee20802caf6"},
+}