added wxNativeContainerWindow and implemented it for wxMSW and wxGTK

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52427 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/nativewin.cpp

@@ -0,0 +1,63 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        src/msw/nativewin.cpp
+// Purpose:     wxNativeWindow implementation
+// Author:      Vadim Zeitlin
+// Created:     2008-03-05
+// RCS-ID:      $Id$
+// Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwindows.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// for compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+#endif // WX_PRECOMP
+
+#include "wx/nativewin.h"
+#include "wx/msw/private.h"
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+bool wxNativeContainerWindow::Create(wxNativeContainerWindowHandle hwnd)
+{
+    if ( !::IsWindow(hwnd) )
+    {
+        // strictly speaking, the fact that IsWindow() returns true doesn't
+        // mean that the window handle is valid -- it could be being deleted
+        // right now, for example
+        //
+        // but if it returns false, the handle is definitely invalid
+        return false;
+    }
+
+    // make this HWND really a wxWindow
+    SubclassWin(hwnd);
+
+    // inherit the other attributes we can from the native HWND
+    AdoptAttributesFromHWND();
+
+    return true;
+}
+
+wxNativeContainerWindow::~wxNativeContainerWindow()
+{
+    // prevent the base class dtor from destroying the window, it doesn't
+    // belong to us so we should leave it alive
+    DissociateHandle();
+}
+