Display placeholder if no statistics available

osu.Game.Tests/Visual/Ranking/TestSceneStatisticsPanel.cs

@@ -3,6 +3,8 @@
 
 using System.Linq;
 using NUnit.Framework;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Scoring;
 using osu.Game.Screens.Ranking.Statistics;
@@ -12,7 +14,7 @@ namespace osu.Game.Tests.Visual.Ranking
     public class TestSceneStatisticsPanel : OsuTestScene
     {
         [Test]
-        public void TestScore()
+        public void TestScoreWithStatistics()
         {
             var score = new TestScoreInfo(new OsuRuleset().RulesetInfo)
             {
@@ -22,9 +24,20 @@ namespace osu.Game.Tests.Visual.Ranking
             loadPanel(score);
         }
 
+        [Test]
+        public void TestScoreWithoutStatistics()
+        {
+            loadPanel(new TestScoreInfo(new OsuRuleset().RulesetInfo));
+        }
+
         private void loadPanel(ScoreInfo score) => AddStep("load panel", () =>
         {
-            Child = new StatisticsPanel(score);
+            Child = new StatisticsPanel
+            {
+                RelativeSizeAxes = Axes.Both,
+                State = { Value = Visibility.Visible },
+                Score = { Value = score }
+            };
         });
     }
 }

osu.Game/Screens/Ranking/ResultsScreen.cs

@@ -89,7 +89,11 @@ namespace osu.Game.Screens.Ranking
                                                 SelectedScore = { BindTarget = SelectedScore },
                                                 PostExpandAction = onExpandedPanelClicked
                                             },
-                                            statisticsPanel = new StatisticsPanel(Score) { RelativeSizeAxes = Axes.Both }
+                                            statisticsPanel = new StatisticsPanel
+                                            {
+                                                RelativeSizeAxes = Axes.Both,
+                                                Score = { BindTarget = SelectedScore }
+                                            }
                                         }
                                     }
                                 },

osu.Game/Screens/Ranking/Statistics/StatisticsPanel.cs

@@ -1,8 +1,11 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
+using osu.Game.Online.Placeholders;
 using osu.Game.Scoring;
 using osuTK;
 
@@ -12,15 +15,14 @@ namespace osu.Game.Screens.Ranking.Statistics
     {
         public const float SIDE_PADDING = 30;
 
+        public readonly Bindable<ScoreInfo> Score = new Bindable<ScoreInfo>();
+
         protected override bool StartHidden => true;
 
-        public StatisticsPanel(ScoreInfo score)
+        private readonly Container content;
+
+        public StatisticsPanel()
         {
-            // Todo: Not correct.
-            RelativeSizeAxes = Axes.Both;
-
-            FillFlowContainer statisticRows;
-
             InternalChild = new Container
             {
                 RelativeSizeAxes = Axes.Both,
@@ -31,24 +33,47 @@ namespace osu.Game.Screens.Ranking.Statistics
                     Top = SIDE_PADDING,
                     Bottom = 50 // Approximate padding to the bottom of the score panel.
                 },
-                Child = statisticRows = new FillFlowContainer
+                Child = content = new Container { RelativeSizeAxes = Axes.Both },
+            };
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Score.BindValueChanged(populateStatistics, true);
+        }
+
+        private void populateStatistics(ValueChangedEvent<ScoreInfo> score)
+        {
+            foreach (var child in content)
+                child.FadeOut(150).Expire();
+
+            var newScore = score.NewValue;
+
+            if (newScore.HitEvents == null || newScore.HitEvents.Count == 0)
+                content.Add(new MessagePlaceholder("Score has no statistics :("));
+            else
+            {
+                var rows = new FillFlowContainer
                 {
                     RelativeSizeAxes = Axes.Both,
                     Direction = FillDirection.Vertical,
                     Spacing = new Vector2(30, 15),
-                }
+                };
-            };
 
-            foreach (var s in score.Ruleset.CreateInstance().CreateStatistics(score))
+                foreach (var row in newScore.Ruleset.CreateInstance().CreateStatistics(newScore))
-            {
-                statisticRows.Add(new GridContainer
                 {
-                    RelativeSizeAxes = Axes.X,
+                    rows.Add(new GridContainer
-                    AutoSizeAxes = Axes.Y,
+                    {
-                    Content = new[] { s.Content },
+                        RelativeSizeAxes = Axes.X,
-                    ColumnDimensions = s.ColumnDimensions,
+                        AutoSizeAxes = Axes.Y,
-                    RowDimensions = new[] { new Dimension(GridSizeMode.AutoSize) }
+                        Content = new[] { row.Content },
-                });
+                        ColumnDimensions = row.ColumnDimensions,
+                        RowDimensions = new[] { new Dimension(GridSizeMode.AutoSize) }
+                    });
+                }
+
+                content.Add(rows);
             }
         }