Add tabbing

project.godot

@@ -146,6 +146,18 @@ camera_orbit_down={
 "events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":3,"axis_value":1.0,"script":null)
 ]
 }
+tab_prev={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":81,"key_label":0,"unicode":113,"location":0,"echo":false,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":9,"pressure":0.0,"pressed":false,"script":null)
+]
+}
+tab_next={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":69,"key_label":0,"unicode":101,"location":0,"echo":false,"script":null)
+, Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":10,"pressure":0.0,"pressed":false,"script":null)
+]
+}
 ui_accept={
 "deadzone": 0.5,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":4194309,"physical_keycode":0,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)

ui/settings/SettingsMenu.gd

@@ -17,6 +17,16 @@ func _notification(what:int) -> void:
   if what == NOTIFICATION_VISIBILITY_CHANGED and visible:
     tabs.grab_focus()
 
+func _input(event:InputEvent) -> void:
+  if !is_visible_in_tree():
+    return
+  if event.is_action_pressed("tab_next"):
+    tabs.current_tab = (tabs.current_tab + 1) % tabs.tab_count
+    get_viewport().set_input_as_handled()
+  elif event.is_action_pressed("tab_prev"):
+    tabs.current_tab = (tabs.current_tab - 1 + tabs.tab_count) % tabs.tab_count
+    get_viewport().set_input_as_handled()
+
 func onTabChanged(tabIndex:int) -> void:
   for control in tabControls:
     control.visible = false