From 75a2645e11fe191cc812cd768b61322456b5f8b8 Mon Sep 17 00:00:00 2001
From: Julian Smart <julian@anthemion.co.uk>
Date: Sun, 10 Apr 2005 17:14:58 +0000
Subject: [PATCH] Hack to make wxStaticBox be repainted when inside a scrolling
 window

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33477 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/msw/statbox.cpp | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/msw/statbox.cpp b/src/msw/statbox.cpp
index beb2797300..da28e527ff 100644
--- a/src/msw/statbox.cpp
+++ b/src/msw/statbox.cpp
@@ -142,7 +142,26 @@ WXDWORD wxStaticBox::MSWGetStyle(long style, WXDWORD *exstyle) const
     styleWin &= ~WS_CLIPCHILDREN;
 
     if ( exstyle )
-        *exstyle = 0;
+    {
+        // If any of the ancestors are scrolling windows, style has to be WS_EX_TRANSPARENT
+        // or the static box won't be painted when the window is scrolled. We try
+        // not to do this normally, because we get a lot of flicker.
+        wxWindow* p = GetParent();
+        bool ancestorScrolls = false;
+        while (p && !p->IsTopLevel())
+        {
+            if (p->HasFlag(wxVSCROLL) || GetParent()->HasFlag(wxHSCROLL))
+            {
+                ancestorScrolls = true;
+                break;
+            }
+            p = p->GetParent();
+        }
+        if (ancestorScrolls)
+            *exstyle = WS_EX_TRANSPARENT;
+        else
+            *exstyle = 0;
+    }
 
     return styleWin | BS_GROUPBOX;
 }
-- 
2.45.2