# HG changeset patch
# User Alys Brooks <alysbrooks@fastmail.com>
# Date 2022-07-28 07:50:59
# Node ID 1735a628e0975e1484ae3a0bfb865b45b3042c93
# Parent  1bbd6b30ac60d5855bf376d5e1ed0ae25c009940

Get rudimentary custom graph plot working.

diff --git a/isometric-park-fna/UI/Graph.cs b/isometric-park-fna/UI/Graph.cs
--- a/isometric-park-fna/UI/Graph.cs
+++ b/isometric-park-fna/UI/Graph.cs
@@ -39,8 +39,48 @@
         .Select(e => (e, false))
         .ToDictionary(t => t.Item1, t=> t.Item2);
 
+        public static void DrawLine(ImDrawListPtr draw_list, Num.Vector2[] points) {
 
-        public static void Render(ImFontPtr font, Simulation sim, ImGuiWindowBridgeEngine engine)
+            var p = Num.Vector2.Zero;// ImGui.GetCursorScreenPos();
+
+            // var points = new Num.Vector2[] { new Num.Vector2(0, 0), new Num.Vector2(25, 25), new Num.Vector2(50, 500) };
+
+            for (int i = 0; i < points.Length; i++)
+            {
+                var c = ImGui.GetCursorScreenPos();
+                points[i] = Num.Vector2.Add(points[i], c);
+            }
+
+            // uint col = 0b_1111_1111_1111_0000;
+            uint col = 0xFF000000;
+
+            draw_list.AddPolyline(ref points[0], points.Length, col, ImDrawFlags.RoundCornersDefault, 1.0f);
+
+        }
+
+        public static int Scale(Num.Vector2 domain, Num.Vector2 range, int num) {
+            //https://stats.stackexchange.com/a/281164
+
+            var domain_span = Math.Max(1, (domain.Y - domain.X));
+            var range_span = range.Y - range.X;
+
+            var start = range.X - domain.X;
+
+
+            // return (int)((domain_span / range_span) * (num + start));
+
+            checked
+            {
+
+            return (int) (((num - domain.X) / domain_span) * range_span + range.X);
+            }
+
+
+
+        }
+
+
+        public static async void Render(ImFontPtr font, Simulation sim, ImGuiWindowBridgeEngine engine)
         {
             bool newShow = true;
 
@@ -99,8 +139,6 @@
 
             ImPlot.PushStyleVar(ImPlotStyleVar.LineWeight, 2.0f);
             ImPlot.PushStyleVar(ImPlotStyleVar.MinorAlpha, 0.0f);
-            // ImPlot.PushStyleVar(ImPlotStyleVar.MajorGridSize, new Num.Vector2(0.0f, 0.0f));
-            // ImPlot.PushStyleVar(ImPlotStyleVar.MinorGridSize, new Num.Vector2(0.0f, 0.0f));
 
             ImPlot.SetNextPlotLimits(totals.Count()-periods, totals.Count(), min, max, ImGuiCond.Always);
             if( ImPlot.BeginPlot("My Plot", null, null, new Num.Vector2(-1,0), ImPlotFlags.NoLegend | ImPlotFlags.NoMousePos )) {
@@ -114,6 +152,8 @@
                         ImPlot.PlotLine(key, ref data_array[0], data_array.Length);
                         ImPlot.AnnotateClamped(data_array.Length-1, data_array[data_array.Length-1],
                                                new Num.Vector2(5, -10), StyleSets.grey, key);
+
+
                     }
                 }
 
@@ -122,6 +162,7 @@
 
             ImPlot.PopStyleVar(2);
 
+
             ImGui.RadioButton("1 year", ref GraphWindow.year, 1);
             ImGui.SameLine();
             ImGui.RadioButton("5 years", ref GraphWindow.year, 5);
@@ -161,8 +202,28 @@
             }
 
 
+            var draw_list = ImGui.GetWindowDrawList();
 
 
+            var range = new Num.Vector2(200, 0);
+
+                foreach (var key in keys) {
+                    var show = data_sets_show[key];
+                    var data = data_sets[key];
+                    var domain = new Num.Vector2((int)data.Min(), (int)data.Max());
+                    // var data_array = datasets[key].Select((p) => Scale(domain, range, (int)p) ).Select((p,i) => new Num.Vector2(i*10, (int)p)).ToArray();
+                    if (data.Count() > 0 && show)
+                    {
+                    // Logging.Spy(range);
+                    // Logging.Spy(domain);
+                    IEnumerable<int> data_array = data_sets[key].Select((p) => Scale(domain, range, (int)p));
+                    var data_array2 = data_array.Select((p, i) => new Num.Vector2(i * 10, p)).ToArray();
+                        DrawLine(draw_list, data_array2);
+                    }
+                }
+            
+            ImGui.Dummy(new Num.Vector2(200, 200)); 
+
             ImGui.End();
             ImGui.GetStyle().WindowMenuButtonPosition = ImGuiDir.Left;
             StyleSets.defaultSet.pop();