Only list played songs in the statistics song list

Songs never played are left out of the song list, so the Show menu is
hidden while it is shown.

statistics/statistics_view.gd

@@ -1,8 +1,8 @@
 class_name StatisticsView
 extends Panel
 ## Shows every soundtrack on the server as a card with its play statistics, or every
-## song in a list with its soundtrack. Either can be searched, filtered on whether it has
-## been played, and sorted.
+## played song in a list with its soundtrack. Both can be searched and sorted, and the
+## cards filtered on whether the soundtrack has been played.
 ##
 ## Shown instead of the quiz when the Statistics tab is chosen.
 
@@ -36,6 +36,7 @@ var _songs_ready: bool = false
 
 @onready var search_field: LineEdit = %SearchField
 @onready var clear_button: Button = %ClearButton
+@onready var show_label: Label = $Toolbar/ShowLabel
 @onready var show_option: OptionButton = %ShowOption
 @onready var sort_option: OptionButton = %SortOption
 @onready var count_label: Label = %CountLabel
@@ -81,6 +82,9 @@ func set_mode(new_mode: Mode) -> void:
 	songs_mode_button.set_pressed_no_signal(mode == Mode.SONGS)
 	card_scroll.visible = mode == Mode.SOUNDTRACKS
 	song_list.visible = mode == Mode.SONGS
+	# The song list only has played songs, so there is nothing to filter
+	show_label.visible = mode == Mode.SOUNDTRACKS
+	show_option.visible = mode == Mode.SOUNDTRACKS
 	search_field.placeholder_text = "Search soundtracks" if mode == Mode.SOUNDTRACKS \
 			else "Search songs and soundtracks"
 	apply_sort()
@@ -167,11 +171,10 @@ func _on_song_pressed(song: SongInfoForStats) -> void:
 		soundtrack_selected.emit(_soundtracks[song.soundtrack_name])
 
 
-# Shows the songs matching the search text and the show menu, in the sort menu's order
+# Shows the songs matching the search text, in the sort menu's order
 func _show_songs() -> void:
 	_prepare_songs()
 	var search_text: String = search_field.text.strip_edges()
-	var filter: ShowFilter = show_option.selected as ShowFilter
 	var song_names: Dictionary = {}
 	var soundtrack_names: Dictionary = {}
 	if !search_text.is_empty():
@@ -182,18 +185,18 @@ func _show_songs() -> void:
 	var shown: Array[SongInfoForStats] = []
 	for song: SongInfoForStats in songs_in_order(_songs_a_to_z,
 			sort_option.selected as SortOrder):
-		if (search_text.is_empty() || song_names.has(song.song_name)
-				|| soundtrack_names.has(song.soundtrack_name)) \
-				&& _song_passes_filter(song, filter):
+		if search_text.is_empty() || song_names.has(song.song_name) \
+				|| soundtrack_names.has(song.soundtrack_name):
 			shown.append(song)
 	song_list.show_songs(shown, search_text)
 	if shown.size() == _songs_a_to_z.size():
-		count_label.text = "%d songs" % shown.size()
+		count_label.text = "%d played songs" % shown.size()
 	else:
-		count_label.text = "%d of %d songs" % [shown.size(), _songs_a_to_z.size()]
+		count_label.text = "%d of %d played songs" % [shown.size(), _songs_a_to_z.size()]
 
 
-# Lists every song once after loading, sorted A to Z, which the other orders start from
+# Lists every played song once after loading, sorted A to Z, which the other orders
+# start from. Songs never played are left out: there are many and they say nothing.
 func _prepare_songs() -> void:
 	if _songs_ready:
 		return
@@ -202,6 +205,8 @@ func _prepare_songs() -> void:
 	var names: Dictionary = {}
 	for soundtrack: SoundtrackWithSongs in _soundtracks.values():
 		for song: SongInfoForStats in soundtrack.songs:
+			if song.times_played == 0:
+				continue
 			# The song list finds a song's soundtrack by its name
 			song.soundtrack_name = soundtrack.soundtrack_name
 			_songs_a_to_z.append(song)
@@ -243,15 +248,6 @@ static func songs_in_order(
 	return a_to_z
 
 
-static func _song_passes_filter(song: SongInfoForStats, filter: ShowFilter) -> bool:
-	match filter:
-		ShowFilter.PLAYED:
-			return song.times_played > 0
-		ShowFilter.NEVER_PLAYED:
-			return song.times_played == 0
-	return true
-
-
 func _on_load_failed() -> void:
 	_loading = false
 	if cards.is_empty():