Merge pull request #14548 from volzhs/fix-out-of-size

Fix Index p_current=0 error at starting editor

scene/gui/tab_container.cpp

@@ -294,13 +294,17 @@ void TabContainer::_notification(int p_what) {
 			}
 		} break;
 		case NOTIFICATION_THEME_CHANGED: {
-			if (get_tab_count() > 0) {
-				call_deferred("set_current_tab", get_current_tab()); //wait until all changed theme
-			}
+			call_deferred("_on_theme_changed"); //wait until all changed theme
 		} break;
 	}
 }
 
+void TabContainer::_on_theme_changed() {
+	if (get_tab_count() > 0) {
+		set_current_tab(get_current_tab());
+	}
+}
+
 int TabContainer::_get_tab_width(int p_index) const {
 
 	ERR_FAIL_INDEX_V(p_index, get_tab_count(), 0);
@@ -658,6 +662,7 @@ void TabContainer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_popup"), &TabContainer::get_popup);
 
 	ClassDB::bind_method(D_METHOD("_child_renamed_callback"), &TabContainer::_child_renamed_callback);
+	ClassDB::bind_method(D_METHOD("_on_theme_changed"), &TabContainer::_on_theme_changed);
 
 	ADD_SIGNAL(MethodInfo("tab_changed", PropertyInfo(Variant::INT, "tab")));
 	ADD_SIGNAL(MethodInfo("tab_selected", PropertyInfo(Variant::INT, "tab")));

scene/gui/tab_container.h

@@ -60,6 +60,7 @@ private:
 
 	Vector<Control *> _get_tabs() const;
 	int _get_tab_width(int p_index) const;
+	void _on_theme_changed();
 
 protected:
 	void _child_renamed_callback();