[4.0-dev] GUI Input Mapping Demo Persistent Key Mapping- Fixes #629

gui/input_mapping/ActionRemapButton.gd

@@ -25,8 +25,12 @@ func _unhandled_key_input(event):
 
 
 func remap_action_to(event):
+	# We first change the event in this game instance.
 	InputMap.action_erase_events(action)
 	InputMap.action_add_event(action, event)
+	# And then save it to the keymaps file
+	KeyPersistence.keymaps[action] = event
+	KeyPersistence.save_keymap()
 	text = "%s Key" % event.as_text()
 
 

gui/input_mapping/ActionRemapButton.tscn

@@ -1,12 +1,9 @@
-[gd_scene load_steps=2 format=2]
+[gd_scene load_steps=2 format=3 uid="uid://cy6kmby6mupvv"]
 
-[ext_resource path="res://ActionRemapButton.gd" type="Script" id=1]
+[ext_resource type="Script" path="res://ActionRemapButton.gd" id="1"]
 
 [node name="ActionRemapButton" type="Button"]
 offset_right = 90.0
 offset_bottom = 30.0
 toggle_mode = true
-script = ExtResource( 1 )
-__meta__ = {
-"_edit_use_anchors_": false
-}
+script = ExtResource( "1" )

gui/input_mapping/InputRemapMenu.tscn

@@ -1,6 +1,6 @@
 [gd_scene load_steps=2 format=3 uid="uid://bjdgwg23lm1d4"]
 
-[ext_resource type="PackedScene" path="res://ActionRemapButton.tscn" id="1"]
+[ext_resource type="PackedScene" uid="uid://cy6kmby6mupvv" path="res://ActionRemapButton.tscn" id="1"]
 
 [node name="InputRemapMenu" type="Control"]
 anchor_right = 1.0
@@ -11,9 +11,6 @@ anchor_right = 1.0
 offset_top = 24.0
 offset_bottom = 55.0
 text = "Click on a button to reassign its action key."
-__meta__ = {
-"_edit_use_anchors_": false
-}
 
 [node name="RemapButtonGroup" type="Button" parent="."]
 anchor_left = 0.5
@@ -26,9 +23,6 @@ offset_right = 160.0
 offset_bottom = 144.0
 disabled = true
 flat = true
-__meta__ = {
-"_edit_use_anchors_": false
-}
 
 [node name="ActionsList" type="VBoxContainer" parent="RemapButtonGroup"]
 anchor_left = 0.5
@@ -39,9 +33,6 @@ offset_left = -160.0
 offset_top = -140.0
 offset_right = 160.0
 offset_bottom = 140.0
-__meta__ = {
-"_edit_use_anchors_": false
-}
 
 [node name="ActionRemapRow" type="HBoxContainer" parent="RemapButtonGroup/ActionsList"]
 offset_right = 320.0

gui/input_mapping/KeyPersistence.gd

@@ -0,0 +1,44 @@
+# This is an autoload (singleton) which will save
+# the key maps in a simple way through a dictionary.
+extends Node
+
+const keymaps_path = "user://keymaps.dat"
+var keymaps: Dictionary
+
+
+func _ready() -> void:
+	# First we create the keymap dictionary on startup with all
+	# the keymap actions we have.
+	for action in InputMap.get_actions():
+		if InputMap.action_get_events(action).size() != 0:
+			keymaps[action] = InputMap.action_get_events(action)[0]
+	load_keymap()
+
+
+func load_keymap() -> void:
+	var file := File.new()
+	if not file.file_exists(keymaps_path):
+		save_keymap() # There is no save file yet, so let's create one.
+		return
+	file.open(keymaps_path, File.READ)
+	var temp_keymap = file.get_var(true) as Dictionary
+	file.close()
+	# We don't just replace the keymaps dictionary, because if you
+	# updated your game and removed/added keymaps, the data of this
+	# save file may have invalid actions. So we check one by one to
+	# make sure that the keymap dictionary really has all current actions.
+	for action in keymaps.keys():
+		if temp_keymap.has(action):
+			keymaps[action] = temp_keymap[action]
+			# Whilst setting the keymap dictionary, we also set the
+			# correct InputMap event
+			InputMap.action_erase_events(action)
+			InputMap.action_add_event(action, keymaps[action])
+
+
+func save_keymap() -> void:
+	# For saving the keymap, we just save the entire dictionary as a var.
+	var file := File.new()
+	file.open(keymaps_path, File.WRITE)
+	file.store_var(keymaps, true)
+	file.close()

gui/input_mapping/project.godot

@@ -20,6 +20,10 @@ run/main_scene="res://InputRemapMenu.tscn"
 config/icon="res://icon.png"
 config/features=PackedStringArray("4.0")
 
+[autoload]
+
+KeyPersistence="*res://KeyPersistence.gd"
+
 [display]
 
 window/size/viewport_width=640