xml -> lua

stepmania/Themes/default/BGAnimations/ScreenSelectMusic overlay/difficulties.lua

@@ -0,0 +1,23 @@
+local children = {};
+for idx, diff in pairs(Difficulty) do -- 0, Difficulty_Beginner
+	children[#children+1] = LoadActor( "_DifficultyDisplay 6x1" ) .. {
+		InitCommand=cmd(pause;setstate,Difficulty:Reverse()[diff]);
+		ShowCommand=cmd(stoptweening;linear,0.1;diffusealpha,1);
+		HideCommand=cmd(stoptweening;linear,0.1;diffusealpha,0);
+		BeginCommand=cmd(y,16*idx);
+
+		SetCommand=function(self)
+			local song = GAMESTATE:GetCurrentSong()
+			local st = GAMESTATE:GetCurrentStyle():GetStepsType()
+			local bHasStepsTypeAndDifficulty =
+				song and song:HasStepsTypeAndDifficulty( st, diff );
+
+			self:playcommand( bHasStepsTypeAndDifficulty and "Show" or "Hide" );
+		end;
+		CurrentSongChangedMessageCommand=cmd(playcommand,"Set");
+	};
+end
+
+return Def.ActorFrame {
+	children = children
+};