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diff --git a/nsplugins/viewer/kxt.h b/nsplugins/viewer/kxt.h
new file mode 100644
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+/*
+
+  kxt.h  -  Xt enabled Qt classed (derived from Qt Extension QXt)
+
+  Copyright (c) 2000 Stefan Schimanski <1Stein@gmx.de>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+*/
+
+/****************************************************************************
+**
+** Definition of Qt extension classes for Xt/Motif support.
+**
+** Created : 980107
+**
+** Copyright (C) 1992-2000 Troll Tech AS.  All rights reserved.
+**
+** This file is part of the Qt GUI Toolkit.
+**
+** This file may be distributed under the terms of the Q Public License
+** as defined by Troll Tech AS of Norway and appearing in the file
+** LICENSE.QPL included in the packaging of this file.
+**
+** Licensees holding valid Qt Professional Edition licenses may use this
+** file in accordance with the Qt Professional Edition License Agreement
+** provided with the Qt Professional Edition.
+**
+** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
+** information about the Professional Edition licensing, or see
+** http://www.trolltech.com/qpl/ for QPL licensing information.
+**
+*****************************************************************************/
+#ifndef KXT_H
+#define KXT_H
+
+#include <qglobal.h>
+#if QT_VERSION < 0x030100
+
+#include <kapplication.h>
+#include <qwidget.h>
+#include <X11/Intrinsic.h>
+
+class KXtApplication : public KApplication {
+    Q_OBJECT
+    void init();
+
+public:
+    KXtApplication(int& argc, char** argv,
+	const QCString& rAppName, bool allowStyles=true, bool GUIenabled=true,
+	XrmOptionDescRec *options=0, int num_options=0, char** resources=0);
+    KXtApplication(Display*, int& argc, char** argv, const QCString& rAppName,
+                   bool allowStyles=true, bool GUIenabled=true);
+    ~KXtApplication();
+};
+
+class KXtWidget : public QWidget {
+    Q_OBJECT
+    Widget xtw;
+    Widget xtparent;
+    bool   need_reroot;
+    void init(const char* name, WidgetClass widget_class,
+		    Widget parent, QWidget* qparent,
+		    ArgList args, Cardinal num_args,
+		    bool managed);
+    friend void qwidget_realize( Widget widget, XtValueMask* mask,
+				 XSetWindowAttributes* attributes );
+
+public:
+    KXtWidget(const char* name, Widget parent, bool managed=FALSE);
+    KXtWidget(const char* name, WidgetClass widget_class,
+	      QWidget *parent=0, ArgList args=0, Cardinal num_args=0,
+	      bool managed=FALSE);
+    ~KXtWidget();
+
+    Widget xtWidget() const { return xtw; }
+    bool isActiveWindow() const;
+    void setActiveWindow();
+
+protected:
+    void moveEvent( QMoveEvent* );
+    void resizeEvent( QResizeEvent* );
+    bool x11Event( XEvent * );
+};
+
+#endif
+#endif