save in variable

project.godot

@@ -19,6 +19,7 @@ config/icon="res://icon.png"
 [autoload]
 
 Global="*res://scripts/global.gd"
+DataManager="*res://scripts/data_manager.gd"
 
 [display]
 

scripts/data_manager.gd

@@ -0,0 +1,38 @@
+extends Node
+
+const file_name = "open_aim_trainer.json"
+const file_path = "user://" + file_name
+
+var game_data = {}
+
+func _ready():
+	game_data = load_data()
+	print("....")
+	print(game_data)
+
+
+func save_data(key, value):
+
+	game_data[key] = value
+	var json = JSON.stringify(game_data)
+	print(json)
+	var file = FileAccess.open(file_path, FileAccess.WRITE)
+	file.store_line(json)
+	file.close()
+
+func get_data(key):
+	return game_data.get(key)
+
+func load_data():
+	var json = {}
+	var file = FileAccess.open(file_path, FileAccess.READ)
+	if file:
+		json = JSON.new()
+		print(game_data)
+		game_data = json.parse(file.get_as_text())
+		print(json.data)
+		file.close()
+	else:
+		print("File not found.")
+
+	return json.data

scripts/ui/MainScreen.gd

@@ -3,6 +3,7 @@ extends Control
 @onready var ResOptionButton = $MarginContainer/HBoxContainer/VBoxContainer/OptionButton
 @onready var resolution_label := $MarginContainer/HBoxContainer/VBoxContainer/ResolutionLabel
 @onready var gamelist := $Panel/ScrollContainer/VBoxContainer2
+@onready var slider_quality := $MarginContainer/HBoxContainer/VBoxContainer/QualitySlider
 
 #var Resoltuions: Dictionary = {
 #	"3840x2160" : Vector2(3840,2160),
@@ -53,6 +54,10 @@ var models3d: Dictionary = {
 # Called when the node enters the scene tree for the first time.
 func _ready():
 #	AddResolutions()
+	
+	if DataManager.get_data("resolution"):
+		slider_quality.value = DataManager.get_data("resolution")
+	
 	AddGames()
 	get_viewport().size_changed.connect(self.update_resolution_label)
 	update_resolution_label()
@@ -123,9 +128,12 @@ func _on_play_pressed():
 
 
 func _on_quality_slider_value_changed(value: float) -> void:
+	quality_change(value)
+	DataManager.save_data("resolution", value)
+
+func quality_change(value: float) -> void:
 	get_viewport().scaling_3d_scale = value
 	update_resolution_label()
 
-
 func _on_quit_pressed():
 	get_tree().quit()