From ff3493c0cefd6713772be9747b8a1e6d874e1afe Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Fri, 31 May 2013 23:21:06 +0000
Subject: [PATCH] Use deferred window positioning in wxWindow::Layout() in
 wxMSW.

Ensure that {Begin,End}RepositioningChildren() are called before/after
changing the positions of multiple children, whether we're using sizers or
constraints.

This fixes display corruption which could happen under Windows 7 and a child
resized first became bigger, pushing off the children resized later.

Closes #15214.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74067 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/common/sizer.cpp  | 2 ++
 src/common/wincmn.cpp | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/src/common/sizer.cpp b/src/common/sizer.cpp
index 37f31766a3..1fd2b74d71 100644
--- a/src/common/sizer.cpp
+++ b/src/common/sizer.cpp
@@ -976,6 +976,8 @@ void wxSizer::Layout()
     CalcMin();
 
     // Applies the layout and repositions/resizes the items
+    wxWindow::ChildrenRepositioningGuard repositionGuard(m_containingWindow);
+
     RecalcSizes();
 }
 
diff --git a/src/common/wincmn.cpp b/src/common/wincmn.cpp
index 1601d08e42..3c2c0f4e1d 100644
--- a/src/common/wincmn.cpp
+++ b/src/common/wincmn.cpp
@@ -2610,6 +2610,8 @@ void wxWindowBase::SetConstraintSizes(bool recurse)
     wxLayoutConstraints *constr = GetConstraints();
     if ( constr && constr->AreSatisfied() )
     {
+        ChildrenRepositioningGuard repositionGuard(this);
+
         int x = constr->left.GetValue();
         int y = constr->top.GetValue();
         int w = constr->width.GetValue();