From c991c659c4930ccb7987f5cdd35bfedffcb5c0b3 Mon Sep 17 00:00:00 2001
From: Artur Wieczorek <artwik@wp.pl>
Date: Fri, 8 Apr 2016 18:44:20 +0200
Subject: [PATCH] Fixed print preview in printing sample (wxGTK).

Under wxGTK print preview is created on wxMemoryDC and hence wxGraphicsContext should be created also for this kind of wxDC in MyApp::Draw.

Closes #17489.
---
 samples/printing/printing.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/samples/printing/printing.cpp b/samples/printing/printing.cpp
index 52a5e68697..f8644625a3 100644
--- a/samples/printing/printing.cpp
+++ b/samples/printing/printing.cpp
@@ -227,6 +227,10 @@ void MyApp::Draw(wxDC&dc)
     if (window_dc)
         gc = wxGraphicsContext::Create( *window_dc );
 
+    wxMemoryDC *memory_dc = wxDynamicCast( &dc, wxMemoryDC );
+    if (memory_dc)
+        gc = wxGraphicsContext::Create( *memory_dc );
+
 #ifdef __WXMSW__
     wxEnhMetaFileDC *emf_dc = wxDynamicCast( &dc, wxEnhMetaFileDC );
     if (emf_dc)