Warn when setting Control size inside ready()

1 files changed, 12 insertions, 1 deletions

diff --git a/scene/gui/control.cpp b/scene/gui/control.cpp
index 0e28c942f1..0c104bf318 100644
--- a/scene/gui/control.cpp
+++ b/scene/gui/control.cpp
@@ -456,6 +456,10 @@ bool Control::is_layout_rtl() const {
 	}
 }
 
+void Control::_clear_size_warning() {
+	data.size_warning = false;
+}
+
 //moved theme configuration here, so controls can set up even if still not inside active scene
 
 void Control::add_child_notify(Node *p_child) {
@@ -503,7 +507,9 @@ void Control::_notification(int p_notification) {
 		} break;
 		case NOTIFICATION_EXIT_TREE: {
 			get_viewport()->_gui_remove_control(this);
-
+		} break;
+		case NOTIFICATION_READY: {
+			connect("ready", callable_mp(this, &Control::_clear_size_warning), varray(), CONNECT_DEFERRED | CONNECT_ONESHOT);
 		} break;
 
 		case NOTIFICATION_ENTER_CANVAS: {
@@ -1702,6 +1708,11 @@ void Control::set_rect(const Rect2 &p_rect) {
 }
 
 void Control::_set_size(const Size2 &p_size) {
+#ifdef DEBUG_ENABLED
+	if (data.size_warning) {
+		WARN_PRINT("Adjusting the size of Control nodes before they are fully initialized is unreliable. Consider deferring it with set_deferred().");
+	}
+#endif
 	set_size(p_size);
 }