Make sample button enabling more granular, like a loading bar

Node2D.gd

@@ -2,6 +2,7 @@ extends Node2D
 
 var PC = load('PC.tscn')
 var PCs = []
+var inst_buttons = []
 var sfx_buttons = []
 
 func _ready():
@@ -27,8 +28,6 @@ func _ready():
 
 func _create_sfx_buttons():
 	var disable_btn := !SoundLoader.has_loaded_audio_samples
-	if disable_btn:
-		SoundLoader.connect('audio_samples_loaded', self, '_enable_sfx_buttons')
 	for i in SoundLoader.INST_NUM:
 		var btn = Button.new()
 		btn.text = 'Play #%02X' % i
@@ -37,7 +36,7 @@ func _create_sfx_buttons():
 		btn.set_scale(Vector2(0.5, 0.5))
 		add_child(btn)
 		btn.connect('pressed', SoundLoader, 'play_sample', [i])
-		sfx_buttons.append(btn)
+		inst_buttons.append(btn)
 		btn.disabled = disable_btn
 	for i in SoundLoader.SFX_NUM:
 		var btn = Button.new()
@@ -49,15 +48,26 @@ func _create_sfx_buttons():
 		btn.connect('pressed', SoundLoader, 'play_sfx', [i])
 		sfx_buttons.append(btn)
 		btn.disabled = disable_btn
+	if disable_btn:
+		SoundLoader.connect('audio_samples_loaded', self, '_enable_sfx_buttons')
+		SoundLoader.connect('audio_inst_sample_loaded', self, '_enable_inst_button')
+		SoundLoader.connect('audio_sfx_sample_loaded', self, '_enable_sfx_button')
 
 func _enable_sfx_buttons():
 	for btn in sfx_buttons:
 		btn.disabled = false
+	for btn in inst_buttons:
+		btn.disabled = false
 
-# Called every frame. 'delta' is the elapsed time since the previous frame.
-#func _process(delta):
-#	update()
-#	pass
+func _enable_sfx_button(id: int):
+	# NB: This assumes sequential loading (may change, probably won't)
+	for i in id+1:
+		sfx_buttons[i].disabled = false
+
+func _enable_inst_button(id: int):
+	# NB: This assumes sequential loading (may change, probably won't)
+	for i in id+1:
+		inst_buttons[i].disabled = false
 
 
 func _on_OptionButton_item_selected(ID):

scripts/loaders/sound_loader.gd

@@ -1,6 +1,8 @@
 extends Node
 
 signal audio_samples_loaded
+signal audio_inst_sample_loaded(id)
+signal audio_sfx_sample_loaded(id)
 var has_loaded_audio_samples := false
 
 const BGM_NUM := 70
@@ -151,15 +153,17 @@ func load_sfx_samples_data(rom: File):
 		rom.seek(brr_spc_addrs[i])
 		# print('Loading sfx sample #%X with BRR data offset $%06X' % [i, rom.get_position()])
 		sfx_samples.append(make_sample(rom, 900, sample_rates[i]))  # Use 900 as a limit, it won't be hit, parser stops after End packet anyway
+		emit_signal('audio_sfx_sample_loaded', i)
 		# print('size of %d samples' % sfx_samples[i].data.size())
 
 
 # Called when the node enters the scene tree for the first time.
 func load_samples(rom: File):
-	pass
 	load_sfx_samples_data(rom)
+	# For some reason, this is a bit slow currently. Might optimize later.
 	for i in INST_NUM:
 		instrument_samples.append(get_inst_sample_data(rom, i))
+		emit_signal('audio_inst_sample_loaded', i)