使用WarningBoxContainer保证只有一个WarningBox

osu.Game.Tournament/Screens/Board/BoardScreen.cs

@@ -34,7 +34,8 @@ public partial class BoardScreen : TournamentMatchScreen
  [Resolved]
  private TournamentSceneManager? sceneManager { get; set; }
 
- private WarningBox warning = null!;
+ private Container warningBoxContainer = null!;
+ private WarningBox? warning;
 
  private readonly Bindable<TournamentMatch?> currentMatch = new Bindable<TournamentMatch?>();
 
@@ -380,6 +381,10 @@ private void load(TextureStore textures)
  Action = reset
  },
  },
+ },
+ warningBoxContainer = new Container
+ {
+ RelativeSizeAxes = Axes.Both
  }
  };
  }
@@ -1182,13 +1187,13 @@ private void updateDisplay()
 
  if (CurrentMatch.Value == null)
  {
- AddInternal(warning = new WarningBox("Cannot access current match, sorry ;w;"));
+ warningBoxContainer.Child = warning = new WarningBox("Cannot access current match, sorry ;w;");
  return;
  }
 
  if (CurrentMatch.Value.Round.Value != null)
  {
- FillFlowContainer<BoardBeatmapPanel>? currentFlow = null;
+ FillFlowContainer<BoardBeatmapPanel>? currentFlow;
 
  // Use predefined Board coodinate
  if (CurrentMatch.Value.Round.Value.UseBoard.Value)
@@ -1225,9 +1230,10 @@ private void updateDisplay()
  }
  else
  {
- AddInternal(warning = new WarningBox("This round isn't set up for board view..."));
+ warningBoxContainer.Child = warning = new WarningBox("This round isn't set up for board view...");
  return;
  }
+
  mapFlows.Padding = new MarginPadding(5);
  }
  }