From 3655aa76165c44d8bd5496d71cd7ff6af6314901 Mon Sep 17 00:00:00 2001
From: Robin Dunn <robin@alldunn.com>
Date: Fri, 26 Oct 2007 22:35:54 +0000
Subject: [PATCH] When freezing a top-level window freeze its top children
 instead.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@49475 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/msw/window.cpp | 46 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

diff --git a/src/msw/window.cpp b/src/msw/window.cpp
index 2cee2bc994..aac4b16de1 100644
--- a/src/msw/window.cpp
+++ b/src/msw/window.cpp
@@ -1516,7 +1516,29 @@ void wxWindowMSW::Freeze()
     if ( !m_frozenness++ )
     {
         if ( IsShown() )
-            SendSetRedraw(GetHwnd(), false);
+        {
+            if ( IsTopLevel() )
+            {
+                // If this is a TLW, then freeze it's non-TLW children
+                // instead.  This is needed because on Windows a frozen TLW
+                // lets window paint and mouse events pass through to other
+                // Windows below this one in z-order.
+                for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
+                      node;
+                      node = node->GetNext() )
+                {
+                    wxWindow *child = node->GetData();
+                    if ( child->IsTopLevel() )
+                        continue;
+                    else
+                        child->Freeze();
+                }
+            }
+            else // This is not a TLW, so just freeze it.
+            {
+                SendSetRedraw(GetHwnd(), false);
+            }
+        }
     }
 }
 
@@ -1528,8 +1550,26 @@ void wxWindowMSW::Thaw()
     {
         if ( IsShown() )
         {
-            SendSetRedraw(GetHwnd(), true);
-
+            if ( IsTopLevel() )
+            {
+                // If this is a TLW, then Thaw it's non-TLW children
+                // instead.  See Freeze.
+                for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
+                      node;
+                      node = node->GetNext() )
+                {
+                    wxWindow *child = node->GetData();
+                    if ( child->IsTopLevel() )
+                        continue;
+                    else
+                        child->Thaw();
+                }
+            }
+            else // This is not a TLW, so just thaw it.
+            {
+                SendSetRedraw(GetHwnd(), true);
+            }
+            
             // we need to refresh everything or otherwise the invalidated area
             // is not going to be repainted
             Refresh();