From a0e449ff41f55b4d82f108f72638f852c962da2d Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Sun, 29 Jul 2001 21:22:12 +0000
Subject: [PATCH] added Freeze/Thaw implementation for Windows

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11207 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 include/wx/msw/window.h |  2 ++
 src/msw/window.cpp      | 15 +++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/wx/msw/window.h b/include/wx/msw/window.h
index 6bdc49db2a..25abce27c7 100644
--- a/include/wx/msw/window.h
+++ b/include/wx/msw/window.h
@@ -90,6 +90,8 @@ public:
                           const wxRect *rect = (const wxRect *) NULL );
     virtual void Update();
     virtual void Clear();
+    virtual void Freeze();
+    virtual void Thaw();
 
     virtual bool SetCursor( const wxCursor &cursor );
     virtual bool SetFont( const wxFont &font );
diff --git a/src/msw/window.cpp b/src/msw/window.cpp
index 49f54984e1..7bbf3ce5cd 100644
--- a/src/msw/window.cpp
+++ b/src/msw/window.cpp
@@ -1194,6 +1194,21 @@ void wxWindowMSW::Clear()
     dc.Clear();
 }
 
+static inline void SendSetRedraw(HWND hwnd, bool on)
+{
+    ::SendMessage(hwnd, WM_SETREDRAW, (WPARAM)on, 0);
+}
+
+void wxWindowMSW::Freeze()
+{
+    SendSetRedraw(FALSE);
+}
+
+void wxWindowMSW::Thaw()
+{
+    SendSetRedraw(TRUE);
+}
+
 void wxWindowMSW::Refresh(bool eraseBack, const wxRect *rect)
 {
     HWND hWnd = GetHwnd();
-- 
2.50.0