From c2efb0d8494b101d9700afc79302fcf371995a6e Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Wed, 28 Sep 2022 17:06:00 +0200
Subject: macOS: support of FLTK widgets in OpenGL 3 windows - cont'd. This
 code is OK under macOS 10 9 and 13.

---
 examples/OpenGL3test.cxx | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'examples')

diff --git a/examples/OpenGL3test.cxx b/examples/OpenGL3test.cxx
index edcb56d93..40d0bf74e 100644
--- a/examples/OpenGL3test.cxx
+++ b/examples/OpenGL3test.cxx
@@ -191,8 +191,10 @@ void toggle_double(Fl_Widget *wid, void *data) {
   SimpleGL3Window *glwin = (SimpleGL3Window*)data;
   int flags = glwin->mode();
   if (doublebuff) flags |= FL_DOUBLE; else flags &= ~FL_DOUBLE;
-  glwin->mode(flags);
   glwin->reset();
+  glwin->hide();
+  glwin->mode(flags);
+  glwin->show();
 }
 
 
@@ -227,7 +229,7 @@ void button_cb(Fl_Widget *, void *) {
 }
 
 void add_widgets(Fl_Gl_Window *g) {
-  Fl::set_color(FL_FREE_COLOR, 255, 0, 0, 140); // partially transparent red
+  Fl::set_color(FL_FREE_COLOR, 255, 255, 255, 140); // partially transparent white
   g->begin();
   // Create here widgets to go above the GL3 scene
   Fl_Button* b = new Fl_Button( 0, 170, 60, 30, "button");
-- 
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