From f6ecdb4955c210fc01c5637cc8d94af261a33df3 Mon Sep 17 00:00:00 2001
From: Ju Liu <ju@noredink.com>
Date: Tue, 5 Mar 2019 22:48:50 +0000
Subject: [PATCH] Get live reload to work

---
 config/config.exs              |  4 ++--
 config/dev.exs                 |  5 +++++
 config/test.exs                |  1 +
 lib/fitting.ex                 |  2 +-
 lib/scenes/home.ex             | 14 +++++++-------
 lib/scenic_escher.ex           |  1 +
 lib/scenic_escher/refresher.ex | 30 ++++++++++++++++++++++++++++++
 mix.exs                        |  3 ++-
 mix.lock                       |  2 ++
 9 files changed, 51 insertions(+), 11 deletions(-)
 create mode 100644 config/dev.exs
 create mode 100644 config/test.exs
 create mode 100644 lib/scenic_escher/refresher.ex

diff --git a/config/config.exs b/config/config.exs
index dca5180..956a7ea 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -21,5 +21,5 @@ config :scenic_escher, :viewport, %{
 # 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"
+
+import_config "#{Mix.env()}.exs"
diff --git a/config/dev.exs b/config/dev.exs
new file mode 100644
index 0000000..e2030b0
--- /dev/null
+++ b/config/dev.exs
@@ -0,0 +1,5 @@
+use Mix.Config
+
+config :exsync,
+  reload_timeout: 75,
+  reload_callback: {GenServer, :call, [ScenicEscher.Refresher, :refresh_home]}
diff --git a/config/test.exs b/config/test.exs
new file mode 100644
index 0000000..d2d855e
--- /dev/null
+++ b/config/test.exs
@@ -0,0 +1 @@
+use Mix.Config
diff --git a/lib/fitting.ex b/lib/fitting.ex
index a847180..653ac96 100644
--- a/lib/fitting.ex
+++ b/lib/fitting.ex
@@ -7,7 +7,7 @@ defmodule Fitting do
   end
 
   def get_stroke_width(%Box{b: b, c: c}) do
-    max(Vector.length(b), Vector.length(c)) / 150.0
+    max(Vector.length(b), Vector.length(c)) / 100.0
   end
 
   def create_picture(shapes, options \\ []) do
diff --git a/lib/scenes/home.ex b/lib/scenes/home.ex
index 59e0f8c..4b589cc 100644
--- a/lib/scenes/home.ex
+++ b/lib/scenes/home.ex
@@ -5,10 +5,6 @@ defmodule ScenicEscher.Scene.Home do
 
   import Scenic.Primitives
 
-  @note """
-    Hello World!
-  """
-
   @graph Graph.build(font: :roboto, font_size: 24, theme: :light)
          |> group(
            fn g ->
@@ -20,7 +16,11 @@ defmodule ScenicEscher.Scene.Home do
 
              {width, height} = Box.dimensions(box)
 
-             george = Fitting.create_picture(Figure.george())
+             george =
+               Fitting.create_picture(
+                 Figure.george(),
+                 debug: true
+               )
 
              atom =
                Picture.above(
@@ -54,10 +54,9 @@ defmodule ScenicEscher.Scene.Home do
                box
                |> picture.()
                |> Rendering.to_paths({width, height})
-               |> IO.inspect()
 
              initial = g
-             # |> text(@note, fill: :black, translate: {20, 40})
+             # |> text("Hello!", fill: :black, translate: {20, 40})
 
              paths
              |> Enum.reduce(initial, fn {elem, options}, acc ->
@@ -69,6 +68,7 @@ defmodule ScenicEscher.Scene.Home do
          )
 
   def init(_, _) do
+    Process.register(self(), __MODULE__)
     push_graph(@graph)
     {:ok, @graph}
   end
diff --git a/lib/scenic_escher.ex b/lib/scenic_escher.ex
index 45f9867..e2837a9 100644
--- a/lib/scenic_escher.ex
+++ b/lib/scenic_escher.ex
@@ -9,6 +9,7 @@ defmodule ScenicEscher do
 
     # start the application with the viewport
     children = [
+      ScenicEscher.Refresher,
       {Scenic, viewports: [main_viewport_config]}
     ]
 
diff --git a/lib/scenic_escher/refresher.ex b/lib/scenic_escher/refresher.ex
new file mode 100644
index 0000000..9275388
--- /dev/null
+++ b/lib/scenic_escher/refresher.ex
@@ -0,0 +1,30 @@
+defmodule ScenicEscher.Refresher do
+  use GenServer
+
+  def start_link(_) do
+    GenServer.start_link(__MODULE__, :hello)
+  end
+
+  def init(_) do
+    Process.register(self(), __MODULE__)
+    {:ok, :started}
+  end
+
+  def handle_call(:refresh_home, _, state) do
+    send(self(), :refresh_home)
+    Process.send_after(self(), :refresh_home, 100)
+    {:reply, :ok, state}
+  end
+
+  def handle_info(:refresh_home, state) do
+    case Process.whereis(ScenicEscher.Scene.Home) do
+      nil ->
+        :no_op
+
+      pid ->
+        Process.exit(pid, :kill)
+    end
+
+    {:noreply, state}
+  end
+end
diff --git a/mix.exs b/mix.exs
index 8505d6e..277edf8 100644
--- a/mix.exs
+++ b/mix.exs
@@ -24,7 +24,8 @@ defmodule ScenicEscher.MixProject do
   defp deps do
     [
       {:scenic, "~> 0.9"},
-      {:scenic_driver_glfw, "~> 0.9", targets: :host}
+      {:scenic_driver_glfw, "~> 0.9", targets: :host},
+      {:exsync, git: "https://github.com/Arkham/exsync", branch: "support-escher", only: :dev}
     ]
   end
 end
diff --git a/mix.lock b/mix.lock
index bd469e3..17c8b1f 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,5 +1,7 @@
 %{
   "elixir_make": {:hex, :elixir_make, "0.5.2", "96a28c79f5b8d34879cd95ebc04d2a0d678cfbbd3e74c43cb63a76adf0ee8054", [:mix], [], "hexpm"},
+  "exsync": {:git, "https://github.com/Arkham/exsync", "7d35547a27ada1c0a8bcf679cb9a1ccf42db9c36", [branch: "support-escher"]},
+  "file_system": {:hex, :file_system, "0.2.6", "fd4dc3af89b9ab1dc8ccbcc214a0e60c41f34be251d9307920748a14bf41f1d3", [:mix], [], "hexpm"},
   "scenic": {:hex, :scenic, "0.9.0", "129594f918b4e2dd97465b95b4fb3582294ac6bb3e931f12edd09913743964eb", [:make, :mix], [{:elixir_make, "~> 0.4", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm"},
   "scenic_driver_glfw": {:hex, :scenic_driver_glfw, "0.9.1", "b64d345929007186c6b2ca603aec21b1fdde758d3eb32f8467a236e58ccd6a19", [:make, :mix], [{:elixir_make, "~> 0.4", [hex: :elixir_make, repo: "hexpm", optional: false]}, {:scenic, "~> 0.9", [hex: :scenic, repo: "hexpm", optional: false]}], "hexpm"},
 }