From 83fada46757d456e8ad160ab65172e6e1f370b67 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Tue, 5 May 2020 13:51:38 +0400
Subject: [PATCH] Fix separate panels transparent background.

Regression was introduced with migration to Qt 5.12.8.
---
 ui/platform/mac/ui_utility_mac.mm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/ui/platform/mac/ui_utility_mac.mm b/ui/platform/mac/ui_utility_mac.mm
index 803d1a7..3478157 100644
--- a/ui/platform/mac/ui_utility_mac.mm
+++ b/ui/platform/mac/ui_utility_mac.mm
@@ -41,6 +41,7 @@ void InitOnTopPanel(not_null<QWidget*> panel) {
 	Assert([platformWindow isKindOfClass:[NSPanel class]]);
 
 	auto platformPanel = static_cast<NSPanel*>(platformWindow);
+	[platformPanel setBackgroundColor:[NSColor clearColor]];
 	[platformPanel setLevel:NSModalPanelWindowLevel];
 	[platformPanel setCollectionBehavior:NSWindowCollectionBehaviorCanJoinAllSpaces|NSWindowCollectionBehaviorStationary|NSWindowCollectionBehaviorFullScreenAuxiliary|NSWindowCollectionBehaviorIgnoresCycle];
 	[platformPanel setHidesOnDeactivate:NO];