commit 802eb5468bf49f756ca188ac01781e39c954ec3f
Author:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
AuthorDate: Wed Oct 6 09:48:09 2021 +0200
Commit:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
CommitDate: Wed Oct 6 09:48:18 2021 +0200

    macOS: "Fix fullscreen window level corner cases"
    This corresponds to changes of PR#277

 src/Fl_cocoa.mm | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git src/Fl_cocoa.mm src/Fl_cocoa.mm
index 7d28d57..585e87a 100644
--- src/Fl_cocoa.mm
+++ src/Fl_cocoa.mm
@@ -3151,7 +3151,15 @@ void Fl_Cocoa_Window_Driver::fullscreen_on() {
   if (fl_mac_os_version >= 100600) {
     FLWindow *nswin = fl_xid(pWindow);
     [nswin setStyleMask:NSBorderlessWindowMask]; // 10.6
-    [nswin setLevel:NSStatusWindowLevel];
+    if ([nswin isKeyWindow]) {
+      if ([nswin level] != NSStatusWindowLevel) {
+        [nswin setLevel:NSStatusWindowLevel];
+        fixup_window_levels();
+      }
+    } else if([nswin level] != NSNormalWindowLevel) {
+      [nswin setLevel:NSNormalWindowLevel];
+      fixup_window_levels();
+    }
     int sx, sy, sw, sh, X, Y, W, H;
     int top = fullscreen_screen_top();
     int bottom = fullscreen_screen_bottom();