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diff --git a/arts/modules/effects/kstereovolumecontrolgui_impl.h b/arts/modules/effects/kstereovolumecontrolgui_impl.h
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+++ b/arts/modules/effects/kstereovolumecontrolgui_impl.h
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+/*
+
+    Copyright ( C ) 2003 Arnold Krille <arnold@arnoldarts.de>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation;
+    version 2 of the License.
+
+    This library 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+    Boston, MA 02111-1307, USA.
+
+    */
+
+#ifndef ARTS_STEREOVOLUMECONTROL_GUI_H
+#define ARTS_STEREOVOLUMECONTROL_GUI_H
+
+#include <artsmoduleseffects.h>
+
+#include <klayoutbox_impl.h>
+
+#include <kdebug.h>
+
+class KStereoVolumeControlGui_EventMapper;
+
+namespace Arts { // namespace Arts
+
+class KStereoVolumeControlGui_impl : virtual public Arts::StereoVolumeControlGui_skel,
+                                     virtual public Arts::KLayoutBox_impl
+{
+protected:
+	Arts::StereoVolumeControl _svc;
+	Arts::LevelMeter _left, _right;
+	Arts::Tickmarks _tickmarks;
+	Arts::Tickmarks _fadertickmarks;
+	Arts::VolumeFader _volumefader;
+	Arts::Label _label;
+	KStereoVolumeControlGui_EventMapper* _mapper;
+	float _dbmin, _dbmax;
+	Arts::Direction _dir;
+public:
+	KStereoVolumeControlGui_impl( QFrame* =0 );
+
+	void constructor( Arts::StereoVolumeControl );
+
+	Arts::Direction direction();
+	void direction( Arts::Direction );
+	std::string title();
+	void title( const std::string& );
+	float dbmin();
+	void dbmin( float );
+	float dbmax();
+	void dbmax( float );
+
+	Arts::LevelMeter left() { return _left; }
+	Arts::LevelMeter right() { return _right; }
+	Arts::VolumeFader fader() { return _volumefader; }
+	Arts::Tickmarks levelmetertickmarks() { return _tickmarks; }
+	Arts::Tickmarks volumefadertickmarks() { return _fadertickmarks; }
+	Arts::Label label() { return _label; }
+
+	void couple( bool ) {}
+	bool couple() { return true; }
+
+	void updateValues();
+private:
+	void allWidgets( Arts::Direction );
+}; // class StereoVolumeControlGui
+
+} // namespace Arts
+
+#include <qobject.h>
+#include <qtimer.h>
+
+class KStereoVolumeControlGui_EventMapper : public QObject {
+   Q_OBJECT
+public:
+	QTimer* _timer;
+	Arts::KStereoVolumeControlGui_impl* _impl;
+public:
+	KStereoVolumeControlGui_EventMapper( Arts::KStereoVolumeControlGui_impl* impl, QObject* parent, const char* name=0 ) : QObject( parent,name ), _impl( impl ) {
+		_timer = new QTimer( this );
+		connect( _timer, SIGNAL( timeout() ), this, SLOT( slotTimerSignal() ) );
+	}
+public slots:
+	void slotTimerSignal() { _impl->updateValues(); }
+};
+
+#endif
+// vim: sw=4 ts=4