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/gtk/nativewin.cpp

@@ -0,0 +1,74 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        src/gtk/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 <gtk/gtk.h>
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+bool wxNativeContainerWindow::Create(wxNativeContainerWindowHandle *win)
+{
+    if ( !wxTopLevelWindow::Create(NULL, wxID_ANY, "") )
+        return false;
+
+    // we need to realize the window first before reparenting it
+    gtk_widget_realize(m_widget);
+    gdk_window_reparent(m_widget->window, win, 0, 0);
+
+    // we should be initially visible as we suppose that the native window we
+    // wrap is (we could use gdk_window_is_visible() to test for this but this
+    // doesn't make much sense unless we also react to visibility changes, so
+    // just suppose it's always shown for now)
+    Show();
+}
+
+bool wxNativeContainerWindow::Create(wxNativeContainerWindowId anid)
+{
+    bool rc;
+    GdkWindow * const win = gdk_window_foreign_new(anid);
+    if ( win )
+    {
+        rc = Create(win);
+        g_object_unref(win);
+    }
+    else // invalid native window id
+    {
+        rc = false;
+    }
+
+    return rc;
+}
+
+wxNativeContainerWindow::~wxNativeContainerWindow()
+{
+    // there doesn't seem to be anything to do here, GTK+ seems to handle
+    // everything correctly due to its use of reference counting
+}