Make OnSizeChanged trigger immediately rather than on update()

Author: cschreib

include/lxgui/gui_frame.hpp

@@ -1667,8 +1667,6 @@ class frame : public region {
     float min_height_ = 0.0f;
     float max_height_ = std::numeric_limits<float>::infinity();
 
-    vector2f old_size_;
-
     float scale_ = 1.0f;
 
     bool is_mouse_in_frame_ = false;

src/gui_frame.cpp

@@ -1509,7 +1509,16 @@ void frame::update_borders_() {
     check_position_();
 
     if (border_list_ != old_border_list || is_ready_ != old_ready) {
+        if (border_list_.width() != old_border_list.width() ||
+            border_list_.height() != old_border_list.height()) {
+            alive_checker checker(*this);
+            fire_script("OnSizeChanged");
+            if (!checker.is_alive())
+                return;
+        }
+
         get_manager().get_root().notify_hovered_frame_dirty();
+
         if (backdrop_)
             backdrop_->notify_borders_updated();
     }
@@ -1591,15 +1600,6 @@ void frame::update(float delta) {
             }
         }
     }
-
-    vector2f new_size = get_apparent_dimensions();
-    if (old_size_ != new_size) {
-        fire_script("OnSizeChanged");
-        if (!checker.is_alive())
-            return;
-
-        old_size_ = new_size;
-    }
 }
 
 } // namespace lxgui::gui