From 280f724d09095c7489745b58057e16b5d883bf38 Mon Sep 17 00:00:00 2001
From: Paul Licameli <paul.licameli@audacityteam.org>
Date: Thu, 1 Aug 2019 07:01:35 -0400
Subject: [PATCH] Bug2179: time ruler should update while dragging horizontal
 thumb...

... The fix is not needed on Mac, which already does dispatch idle events
between scroll events
---
 src/ProjectWindow.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/ProjectWindow.cpp b/src/ProjectWindow.cpp
index 309fcdecf..4afcb12ee 100644
--- a/src/ProjectWindow.cpp
+++ b/src/ProjectWindow.cpp
@@ -1356,6 +1356,14 @@ void ProjectWindow::OnScroll(wxScrollEvent & WXUNUSED(event))
    viewInfo.sbarH =
       (wxInt64)(mHsbar->GetThumbPosition() / viewInfo.sbarScale) - offset;
    DoScroll();
+
+#ifndef __WXMAC__
+   // Bug2179
+   // This keeps the time ruler in sync with horizontal scrolling, without
+   // making an undesirable compilation dependency of this source file on
+   // the ruler
+   wxTheApp->ProcessIdle();
+#endif
 }
 
 void ProjectWindow::DoScroll()