Preserve item ids to avoid shiftings when deleted

addons/SimpleTODO/SimpleTODO.gd

@@ -77,7 +77,7 @@ func save_data():
 		
 		if column.item_container.get_child_count() > 0:
 			for item in column.item_container.get_children():
-				data.set_value(section, str("item", item.get_index()), item.text_field.text)
+				data.set_value(section, str("item", item.id), item.text_field.text)
 		else:
 			data.set_value(section, "__none__", "null")
 	
@@ -99,6 +99,7 @@ func load_data():
 			
 			var column_item = column.add_item()
 			column_item.text_field.text = data.get_value(section, item)
+			column_item.id = item.to_int()
 	
 	todo_screen.undo_redo.clear_history()
 	is_loading = false

addons/SimpleTODO/TODOColumn.gd

@@ -61,6 +61,7 @@ func _ready() -> void:
 	update_mirror(0)
 	
 	main.connect_scrollbar(update_mirror)
+	item_container.child_entered_tree.connect(validate_unique_id)
 	item_container.child_entered_tree.connect(update_counter.unbind(1), CONNECT_DEFERRED)
 	item_container.child_exiting_tree.connect(update_counter.unbind(1), CONNECT_DEFERRED)
 
@@ -197,3 +198,19 @@ func get_column_from_mouse_position() -> PanelContainer:
 		if child.get_rect().has_point(Vector2(mouse_position.x, 0)):
 			return child
 	return null
+
+func validate_unique_id(for_item: Control):
+	var is_unique := true
+	for item in item_container.get_children():
+		if item != for_item and item.id == for_item.id:
+			is_unique = false
+	
+	if not is_unique:
+		var id_list := item_container.get_children().map(func(item: Control): return item.id)
+		
+		for i in 1000000:
+			if not i in id_list:
+				for_item.id = i
+				return
+		
+		push_error("Simple TODO: Unique ID could not be ensured. Farewell.")

addons/SimpleTODO/TODOItem.gd

@@ -18,6 +18,8 @@ var current_drag_item_index := 0
 var is_dragging := false
 var item_margin := 20
 
+var id: int
+
 func _ready() -> void:
 	undo_redo = main.undo_redo
 	item_placement_holder = main.item_placement_holder

addons/SimpleTODO/plugin.cfg

@@ -3,5 +3,5 @@
 name="Simple TODO"
 description="Organize random notes in tabs."
 author="KoBeWi"
-version="1.3a"
+version="1.4"
 script="SimpleTODO.gd"