Fix focusloss of non-exclusive `AcceptDialog` with `close_on_escape`

Fix, that a non-exclusive AcceptDialog with `close_on_escape == true`
gets closed, when the parent window of the parent window receives focus.

There is no need to rely on the focus of the parent visible window.
Instead check if the AcceptDialog loses focus.

scene/gui/dialogs.cpp

@@ -44,12 +44,6 @@ void AcceptDialog::_input_from_window(const Ref<InputEvent> &p_event) {
 	}
 }
 
-void AcceptDialog::_parent_focused() {
-	if (close_on_escape && !is_exclusive()) {
-		_cancel_pressed();
-	}
-}
-
 void AcceptDialog::_update_theme_item_cache() {
 	Window::_update_theme_item_cache();
 
@@ -70,16 +64,6 @@ void AcceptDialog::_notification(int p_what) {
 					get_ok_button()->grab_focus();
 				}
 				_update_child_rects();
-
-				parent_visible = get_parent_visible_window();
-				if (parent_visible) {
-					parent_visible->connect("focus_entered", callable_mp(this, &AcceptDialog::_parent_focused));
-				}
-			} else {
-				if (parent_visible) {
-					parent_visible->disconnect("focus_entered", callable_mp(this, &AcceptDialog::_parent_focused));
-					parent_visible = nullptr;
-				}
 			}
 		} break;
 
@@ -92,10 +76,9 @@ void AcceptDialog::_notification(int p_what) {
 			}
 		} break;
 
-		case NOTIFICATION_EXIT_TREE: {
-			if (parent_visible) {
-				parent_visible->disconnect("focus_entered", callable_mp(this, &AcceptDialog::_parent_focused));
-				parent_visible = nullptr;
+		case NOTIFICATION_WM_WINDOW_FOCUS_OUT: {
+			if (close_on_escape && !is_exclusive()) {
+				_cancel_pressed();
 			}
 		} break;
 
@@ -129,21 +112,9 @@ void AcceptDialog::_ok_pressed() {
 }
 
 void AcceptDialog::_cancel_pressed() {
-	Window *parent_window = parent_visible;
-	if (parent_visible) {
-		parent_visible->disconnect("focus_entered", callable_mp(this, &AcceptDialog::_parent_focused));
-		parent_visible = nullptr;
-	}
-
 	call_deferred(SNAME("hide"));
-
 	emit_signal(SNAME("canceled"));
-
 	cancel_pressed();
-
-	if (parent_window) {
-		//parent_window->grab_focus();
-	}
 	set_input_as_handled();
 }
 

scene/gui/dialogs.h

@@ -44,8 +44,6 @@ class LineEdit;
 class AcceptDialog : public Window {
 	GDCLASS(AcceptDialog, Window);
 
-	Window *parent_visible = nullptr;
-
 	Panel *bg_panel = nullptr;
 	Label *message_label = nullptr;
 	HBoxContainer *buttons_hbox = nullptr;
@@ -65,7 +63,6 @@ class AcceptDialog : public Window {
 	static bool swap_cancel_ok;
 
 	void _input_from_window(const Ref<InputEvent> &p_event);
-	void _parent_focused();
 
 protected:
 	virtual Size2 _get_contents_minimum_size() const override;