From ef1c9376069eb8bf1ea6c2578368c38df2b85689 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Wed, 3 Jul 2019 15:19:44 +0200
Subject: [PATCH] Fix a bug appeared in macOS 10.15 Catalina Beta about GUI
 scaling transient window.

The bug is that the app freezes for a few seconds before the yellow transient window is closed
if the close message is set from within a timer callback.
If the window to close returns NO to the canBecomeKeyWindow message, the bug does not occur.
Anyway it's good that canBecomeKeyWindow returns NO for a window with the OUTPUT flag.
---
 src/Fl_cocoa.mm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 94cd35489..4662cb1ca 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -640,7 +640,7 @@ void Fl_Cocoa_Screen_Driver::breakMacEventLoop()
   if (Fl::modal_ && (Fl::modal_ != w))
     return NO;	// prevent the caption to be redrawn as active on click
 		//  when another modal window is currently the key win
-  return !(!w || w->tooltip_window() || w->menu_window() || w->parent());
+  return !(!w || w->output() || w->tooltip_window() || w->menu_window() || w->parent());
 }
 
 - (BOOL)canBecomeMainWindow