From 2ca9f7f94d94a808670fb81a13e3945084a023b9 Mon Sep 17 00:00:00 2001
From: Ingo Weyrich <heckflosse67@gmx.de>
Date: Wed, 17 Jul 2019 22:10:46 +0200
Subject: [PATCH] Further small speedup for filebrowser

---
 rtgui/lwbuttonset.cc | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/rtgui/lwbuttonset.cc b/rtgui/lwbuttonset.cc
index 6265c1039..1337c0ea5 100644
--- a/rtgui/lwbuttonset.cc
+++ b/rtgui/lwbuttonset.cc
@@ -18,7 +18,7 @@
  */
 #include "lwbuttonset.h"
 
-LWButtonSet::LWButtonSet () : aw(0), ah(0), ax(0), ay(0)
+LWButtonSet::LWButtonSet () : aw(0), ah(0), ax(-1), ay(-1)
 {
 }
 
@@ -42,20 +42,21 @@ void LWButtonSet::getMinimalDimensions (int& w, int& h)
     w = 0;
     h = 0;
 
-    for (size_t i = 0; i < buttons.size(); i++) {
+    for (const auto entry : buttons) {
         int bw, bh;
-        buttons[i]->getSize (bw, bh);
+        entry->getSize(bw, bh);
         w += bw;
-
-        if (bh > h) {
-            h = bh;
-        }
+        h = std::max(bh, h);
     }
 }
 
 void LWButtonSet::arrangeButtons (int x, int y, int w, int h)
 {
 
+    if (x == ax && y == ay && w == aw && ((h == -1 && ah == 0) || h == ah )) {
+        return;
+    }
+
     int mw, mh;
     getMinimalDimensions (mw, mh);