added drag and drop file adding and fixed a crash with trying to select part of a file on the input player when nothing is loaded

scenes/Nodes/audioplayer.gd

@@ -220,23 +220,24 @@ func _on_button_button_down() -> void:
 
 func _on_button_button_up() -> void:
 	rect_focus = false
-	if get_meta("loadenable") == true:
-		if $LoopRegion.size.x > 0:
-			set_meta("trimfile", true)
-			var length = $AudioStreamPlayer.stream.get_length()
-			var pixel_to_time = length / 399
-			var start = pixel_to_time * $LoopRegion.position.x
-			var starttime = convert_length(start)
-			$StartLabel.text = starttime
-			var end = start + (pixel_to_time * $LoopRegion.size.x)
-			var endtime = convert_length(end)
-			$EndLabel.text = endtime
-			set_meta("trimpoints", [start, end])
-		else:
-			set_meta("trimfile", false)
-			$StartLabel.text = "00:00.00"
-			var end = convert_length($AudioStreamPlayer.stream.get_length())
-			$EndLabel.text = end
+	if audio_player.stream != null:
+		if get_meta("loadenable") == true:
+			if $LoopRegion.size.x > 0:
+				set_meta("trimfile", true)
+				var length = $AudioStreamPlayer.stream.get_length()
+				var pixel_to_time = length / 399
+				var start = pixel_to_time * $LoopRegion.position.x
+				var starttime = convert_length(start)
+				$StartLabel.text = starttime
+				var end = start + (pixel_to_time * $LoopRegion.size.x)
+				var endtime = convert_length(end)
+				$EndLabel.text = endtime
+				set_meta("trimpoints", [start, end])
+			else:
+				set_meta("trimfile", false)
+				$StartLabel.text = "00:00.00"
+				var end = convert_length($AudioStreamPlayer.stream.get_length())
+				$EndLabel.text = end
 			
 
 func convert_length(reportedseconds: float) -> String:

scenes/main/scripts/control.gd

@@ -92,6 +92,7 @@ func make_signal_connections():
 	get_node("Settings").invert_ui.connect(invert_theme_toggled)
 	get_node("Settings").swap_zoom_and_move.connect(swap_zoom_and_move)
 	get_node("Settings").ui_scale_multiplier_changed.connect(scale_ui)
+	get_window().files_dropped.connect(on_files_dropped)
 	
 func hidpi_adjustment():
 	#checks if display is hidpi and scales ui accordingly hidpi - 144
@@ -815,3 +816,38 @@ func swap_zoom_and_move(toggled: bool):
 		graph_edit.set_panning_scheme(1)
 	else:
 		graph_edit.set_panning_scheme(0)
+
+func on_files_dropped(files):
+	var mouse_pos = graph_edit.get_local_mouse_position()
+	
+	#see if files were dropped on an input node
+	var dropped_node
+	for child in graph_edit.get_children():
+		if child is GraphNode:
+			if Rect2(child.position, child.size).has_point(mouse_pos):
+				dropped_node = child
+				break
+				
+	#if they were dropped on a node and the first file in the array is a wav file replace the file in the input node
+	if dropped_node and dropped_node.has_meta("command") and dropped_node.get_meta("command") == "inputfile":
+		if files[0].get_extension().to_lower() == "wav":
+			dropped_node.get_node("AudioPlayer")._on_file_selected(files[0])
+	else:
+		#else make a new input node at the mouse position and load it in
+		if files[0].get_extension().to_lower() == "wav":
+			var new_input_node = graph_edit._make_node("inputfile")
+			new_input_node.position_offset = mouse_pos
+			new_input_node.get_node("AudioPlayer")._on_file_selected(files[0])
+	
+	#remove first element from the array
+	files.remove_at(0)
+	
+	#check if there are any other files
+	if files.size() > 0:
+		var position_plus_offset = Vector2(mouse_pos.x, mouse_pos.y + 250) #apply a vertical offset from the mouse position so nodes dont overlap
+		for file in files:
+			if file.get_extension().to_lower() == "wav":
+				var new_input_node = graph_edit._make_node("inputfile")
+				new_input_node.position_offset = position_plus_offset
+				new_input_node.get_node("AudioPlayer")._on_file_selected(file)
+				position_plus_offset.y = position_plus_offset.y + 250