godot-accessibility/ScreenReader.gd

85 lines
2.6 KiB
GDScript3
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tool
extends Node
var Accessible = preload("Accessible.gd")
var accessibles = []
var focus_restore_timer = Timer.new()
func focused(node):
focus_restore_timer.stop()
func click_focused(node):
pass
func restore_focus():
var focus = find_focusable_control(get_tree().root)
if focus and not focus.get_focus_owner():
print("Restoring focus.")
focus.grab_focus()
focus.grab_click_focus()
func unfocused(node):
focus_restore_timer.start(0.2)
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func augment_node(node):
if node is Control:
var accessible = Accessible.new(node)
accessibles.append(accessible)
if not node.is_connected("focus_entered", self, "focused"):
node.connect("focus_entered", self, "focused", [node])
if not node.is_connected("mouse_entered", self, "click_focused"):
node.connect("mouse_entered", self, "click_focused", [node])
if not node.is_connected("focus_exited", self, "unfocused"):
node.connect("focus_exited", self, "unfocused", [node])
if not node.is_connected("mouse_exited", self, "unfocused"):
node.connect("mouse_exited", self, "unfocused", [node])
func augment_tree(node):
augment_node(node)
for child in node.get_children():
augment_tree(child)
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func set_initial_screen_focus(screen):
TTS.speak("%s: screen" % screen, false)
var control = find_focusable_control(get_tree().root)
if control.get_focus_owner() != null:
return
self.augment_tree(get_tree().root)
var focus = find_focusable_control(get_tree().root)
if not focus:
return
focus.grab_click_focus()
focus.grab_focus()
func find_focusable_control(node):
if node is Control and node.is_visible_in_tree() and (node.focus_mode == Control.FOCUS_CLICK or node.focus_mode == Control.FOCUS_ALL):
return node
for child in node.get_children():
var result = find_focusable_control(child)
if result:
return result
return null
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func set_initial_scene_focus(scene):
self.augment_tree(get_tree().root)
var focus = find_focusable_control(get_tree().root)
if not focus:
return
focus.grab_click_focus()
focus.grab_focus()
func _enter_tree():
focus_restore_timer.one_shot = true
focus_restore_timer.connect("timeout", self, "restore_focus")
add_child(focus_restore_timer)
get_tree().connect("node_added", self, "augment_tree")
func _exit_tree():
for accessible in accessibles:
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if accessible.timer != null:
accessible.timer.unreference()
accessible.timer = null
accessible.free()