From 431aea0327720fc44a3ea81b97eda10a5736ae54 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Sat, 24 Nov 2012 00:33:44 +0000
Subject: [PATCH] Use wxBufferedPaintDC for wxStyledTextCtrl drawing in wxGTK.

GTK+ doesn't seem to use double buffering for Scintilla window for some
reason, resulting in bad flicker when it's updated, e.g. when the user types
into it.

Force the use of double buffering at wxWidgets level by using
wxBufferedPaintDC for painting it. This may be inefficient if GTK+ does double
buffer it in some cases but at least it gets rid of the flicker.

Closes #12704, #14828.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73001 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/stc/stc.cpp    | 8 ++++++++
 src/stc/stc.cpp.in | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/src/stc/stc.cpp b/src/stc/stc.cpp
index 1fa360de2d..f1cfe240df 100644
--- a/src/stc/stc.cpp
+++ b/src/stc/stc.cpp
@@ -53,6 +53,10 @@
     #include "wx/ffile.h"
 #endif
 
+#ifdef __WXGTK__
+    #include "wx/dcbuffer.h"
+#endif
+
 #include "ScintillaWX.h"
 
 //----------------------------------------------------------------------
@@ -4612,7 +4616,11 @@ void wxStyledTextCtrl::AppendTextRaw(const char* text, int length)
 // Event handlers
 
 void wxStyledTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(evt)) {
+#ifdef __WXGTK__
+    wxBufferedPaintDC dc(this);
+#else
     wxPaintDC dc(this);
+#endif
     m_swx->DoPaint(&dc, GetUpdateRegion().GetBox());
 }
 
diff --git a/src/stc/stc.cpp.in b/src/stc/stc.cpp.in
index d63a1f9fc4..eec517db9f 100644
--- a/src/stc/stc.cpp.in
+++ b/src/stc/stc.cpp.in
@@ -53,6 +53,10 @@
     #include "wx/ffile.h"
 #endif
 
+#ifdef __WXGTK__
+    #include "wx/dcbuffer.h"
+#endif
+
 #include "ScintillaWX.h"
 
 //----------------------------------------------------------------------
@@ -750,7 +754,11 @@ void wxStyledTextCtrl::AppendTextRaw(const char* text, int length)
 // Event handlers
 
 void wxStyledTextCtrl::OnPaint(wxPaintEvent& WXUNUSED(evt)) {
+#ifdef __WXGTK__
+    wxBufferedPaintDC dc(this);
+#else
     wxPaintDC dc(this);
+#endif
     m_swx->DoPaint(&dc, GetUpdateRegion().GetBox());
 }
 
-- 
2.45.2