From 0d3a11ed7e129bc8169ef828c13cbdd8006c77fb Mon Sep 17 00:00:00 2001
From: Trevor Lyon <trevor.lyon@icloud.com>
Date: Mon, 6 Sep 2021 13:29:45 -0300
Subject: [PATCH] DASH choropleth-maps

---
 dash/choropleth-maps.jl | 46 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 dash/choropleth-maps.jl

diff --git a/dash/choropleth-maps.jl b/dash/choropleth-maps.jl
new file mode 100644
index 0000000..5fbd6df
--- /dev/null
+++ b/dash/choropleth-maps.jl
@@ -0,0 +1,46 @@
+using Dash
+using DashCoreComponents
+using DashHtmlComponents
+using PlotlyJS, CSV, DataFrames
+
+app = dash(external_stylesheets=["https://codepen.io/chriddyp/pen/bWLwgP.css"])
+
+df = dataset(DataFrame, "election")
+candidates = unique(df.winner)
+election_geo = dataset("election_geo")
+
+app.layout = html_div() do 
+    html_p("Candidates"),
+    dcc_radioitems(
+        id="candidates",
+        options=[
+            (label = x, value = x)
+            for x in candidates
+        ],
+        value=candidates[1],
+        labelStyle=(display = "inline-block",)
+    ),
+    dcc_graph(id="graph")
+end
+
+callback!(app, Output("graph", "figure"), Input("candidates", "value")) do val
+    fig = plot(
+        df,
+        geojson=election_geo,
+        kind="choropleth",
+        range_color=[0,6500],
+        featureidkey="properties.district",
+        locations=:district,
+        z=df[!, val],
+        Layout(
+            geo_fitbounds="locations",
+            geo_projection_type="mercator",
+            geo_visible=false,
+            margin=(r = 0, t = 0, l = 0, b = 0)
+        )
+    )
+    
+    return fig
+end
+
+run_server(app, "0.0.0.0", 8080)