From b77aa4782db731ee3e1226a298b3c6bc52f6d68b Mon Sep 17 00:00:00 2001
From: Stefan Csomor <csomor@advancedconcepts.ch>
Date: Mon, 5 Nov 2018 14:37:54 +0100
Subject: [PATCH] Forcing paint after show on 10.14

layer-backed views do not get a refresh when shown, but wx-user code might depend on the assumption that they do
---
 src/osx/cocoa/window.mm | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/osx/cocoa/window.mm b/src/osx/cocoa/window.mm
index b32f5aef66..3695a1b185 100644
--- a/src/osx/cocoa/window.mm
+++ b/src/osx/cocoa/window.mm
@@ -2573,6 +2573,10 @@ bool wxWidgetCocoaImpl::IsVisible() const
 void wxWidgetCocoaImpl::SetVisibility( bool visible )
 {
     [m_osxView setHidden:(visible ? NO:YES)];
+    
+    // trigger redraw upon shown for layer-backed views
+    if( m_osxView.layer && !m_osxView.isHiddenOrHasHiddenAncestor )
+        SetNeedsDisplay(NULL);
 }
 
 double wxWidgetCocoaImpl::GetContentScaleFactor() const
@@ -3028,7 +3032,7 @@ static void SetSubviewsNeedDisplay( NSView *view )
 {
     for ( NSView *sub in view.subviews )
     {
-        if ( !sub.layer )
+        if ( sub.isHidden || !sub.layer )
             continue;
 
         [sub setNeedsDisplay:YES];