added a tiny class to call Freeze/Thaw in ctor/dtor

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@37842 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/wupdlock.h

@@ -0,0 +1,37 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/wupdlock.h
+// Purpose:     wxWindowUpdateLocker prevents window redrawing
+// Author:      Vadim Zeitlin
+// Created:     2006-03-06
+// RCS-ID:      $Id$
+// Copyright:   (c) 2006 Vadim Zeitlin <vadim@wxwindows.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_WUPDLOCK_H_
+#define _WX_WUPDLOCK_H_
+
+#include "wx/window.h"
+
+// ----------------------------------------------------------------------------
+// wxWindowUpdateLocker prevents updates to the window during its lifetime
+// ----------------------------------------------------------------------------
+
+class wxWindowUpdateLocker
+{
+public:
+    // create an object preventing updates of the given window (which must have
+    // a lifetime at least as great as ours)
+    wxWindowUpdateLocker(wxWindow *win) : m_win(win) { win->Freeze(); }
+
+    // dtor thaws the window to permit updates again
+    ~wxWindowUpdateLocker() { m_win->Thaw(); }
+
+private:
+    wxWindow *m_win;
+
+    DECLARE_NO_COPY_CLASS(wxWindowUpdateLocker)
+};
+
+#endif // _WX_WUPDLOCK_H_
+