Show listing graph; Slight refactor

osu.Game/Graphics/StreamColour.cs

@@ -31,7 +31,7 @@ namespace osu.Game.Graphics
             if (!string.IsNullOrEmpty(name))
                 if (colours.TryGetValue(name, out ColourInfo colour))
                     return colour;
-            return new Color4(255, 255, 255, 255);
+            return new Color4(0, 0, 0, 255);
         }
     }
 }

osu.Game/Online/API/Requests/GetChangelogChartRequest.cs

@@ -2,7 +2,6 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using osu.Game.Online.API.Requests.Responses;
-using System.Collections.Generic;
 
 namespace osu.Game.Online.API.Requests
 {

osu.Game/Online/API/Requests/Responses/APIChangelogChart.cs

@@ -2,7 +2,6 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using Newtonsoft.Json;
-using osu.Framework.Lists;
 using System;
 using System.Collections.Generic;
 

osu.Game/Overlays/Changelog/ChangelogChart.cs

@@ -18,8 +18,8 @@ namespace osu.Game.Overlays.Changelog
     // placeholder json file: https://api.myjson.com/bins/10ye8a
     public class ChangelogChart : BufferedContainer
     {
-        private Box background;
-        private SpriteText text;
+        private readonly Box background;
+        private readonly SpriteText text;
         private APIAccess api;
 
         public ChangelogChart()
@@ -43,6 +43,14 @@ namespace osu.Game.Overlays.Changelog
             };
         }
 
+        /// <summary>
+        /// Draw the graph with all builds
+        /// </summary>
+        public void ShowChart() => fetchAndShowChangelogChart();
+
+        /// <summary>
+        /// Draw the graph for a specific build
+        /// </summary>
         public void ShowChart(APIChangelog releaseStream) => fetchAndShowChangelogChart(releaseStream);
 
         private bool isEmpty(APIChangelogChart changelogChart)
@@ -53,7 +61,7 @@ namespace osu.Game.Overlays.Changelog
             return true;
         }
 
-        private void showChart(APIChangelogChart chartInfo, string updateStreamName)
+        private void showChart(APIChangelogChart chartInfo, string updateStreamName = null)
         {
             if (!isEmpty(chartInfo))
             {
@@ -79,5 +87,12 @@ namespace osu.Game.Overlays.Changelog
             req.Success += res => showChart(res, build.UpdateStream.Name);
             api.Queue(req);
         }
+
+        private void fetchAndShowChangelogChart()
+        {
+            var req = new GetChangelogChartRequest();
+            req.Success += res => showChart(res);
+            api.Queue(req);
+        }
     }
 }

osu.Game/Overlays/ChangelogOverlay.cs

@@ -101,6 +101,7 @@ namespace osu.Game.Overlays
                 else
                     foreach (StreamBadge item in Streams.BadgesContainer.Children)
                         item.Deactivate();
+                chart.ShowChart();
             };
             content.OnBuildChanged = () =>
             {
@@ -155,6 +156,7 @@ namespace osu.Game.Overlays
                 Streams.BadgesContainer.Clear();
                 foreach (APIChangelog item in res)
                     Streams.BadgesContainer.Add(new StreamBadge(item));
+                chart.ShowChart();
             };
             api.Queue(req);
         }