From f3cf88601c7db602930b2c46db218043137ff525 Mon Sep 17 00:00:00 2001
From: ALONSO Laurent <laurent.alonso@inria.fr>
Date: Wed, 6 Oct 2021 10:59:25 +0200
Subject: [PATCH] try to make Scene Editor less CPU hungry...

---
 src/scenedit/scen.main.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/scenedit/scen.main.cpp b/src/scenedit/scen.main.cpp
index e05e3525..1ad69d35 100644
--- a/src/scenedit/scen.main.cpp
+++ b/src/scenedit/scen.main.cpp
@@ -240,23 +240,30 @@ void handle_events() {
 	cFramerateLimiter fps_limiter;
 
 	while(!All_Done) {
+		bool need_redraw=false;
 		if(changed_display_mode) {
+			need_redraw = true;
 			changed_display_mode = false;
 			adjust_windows(mainPtr, mainView);
 		}
 
 #ifdef __APPLE__
 		if (menuChoiceId>=0) {
+			need_redraw = true;
 			handle_menu_choice(eMenu(menuChoiceId));
 			menuChoiceId=-1;
 		}
 #endif
-		while(mainPtr.pollEvent(currentEvent)) handle_one_event(currentEvent);
+		while(mainPtr.pollEvent(currentEvent)) {
+			need_redraw = true;
+			handle_one_event(currentEvent);
+		}
 
 		// Why do we have to set this to false after handling every event?
 		ae_loading = false;
 
-		redraw_everything();
+		if (need_redraw)
+			redraw_everything();
 
 		// Prevent the loop from executing too fast.
 		fps_limiter.frame_finished();