From 6549d4c3c5f5d3e3acc754a2b1dc04f4a0a336d1 Mon Sep 17 00:00:00 2001
From: Paul Cornett <paulcor@users.noreply.github.com>
Date: Thu, 15 Aug 2019 17:14:31 -0700
Subject: [PATCH] Fix wxDC::Clear() with transparent brush on GTK2

See #10273
---
 src/gtk/dcclient.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gtk/dcclient.cpp b/src/gtk/dcclient.cpp
index feea364099..dc3331cc3e 100644
--- a/src/gtk/dcclient.cpp
+++ b/src/gtk/dcclient.cpp
@@ -1508,6 +1508,9 @@ void wxWindowDCImpl::Clear()
 
     if (!m_gdkwindow) return;
 
+    if (!m_backgroundBrush.IsOk() || m_backgroundBrush.GetStyle() == wxBRUSHSTYLE_TRANSPARENT)
+        return;
+
     int width,height;
     DoGetSize( &width, &height );
     gdk_draw_rectangle( m_gdkwindow, m_bgGC, TRUE, 0, 0, width, height );