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diff --git a/src/gui/widgets/PluginControl.h b/src/gui/widgets/PluginControl.h
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+
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rosegarden
+    A MIDI and audio sequencer and musical notation editor.
+
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <[email protected]>,
+        Chris Cannam        <[email protected]>,
+        Richard Bown        <[email protected]>
+
+    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
+    Bown to claim authorship of this work have been asserted.
+
+    Other copyrights also apply to some parts of this work.  Please
+    see the AUTHORS file and individual file headers for details.
+
+    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.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef _RG_PLUGINCONTROL_H_
+#define _RG_PLUGINCONTROL_H_
+
+#include <qobject.h>
+#include <vector>
+
+
+class QWidget;
+class QHBox;
+class QGridLayout;
+
+
+namespace Rosegarden
+{
+
+class Rotary;
+class PluginPort;
+class AudioPluginManager;
+class Studio;
+
+class PluginControl : public QObject
+{
+    Q_OBJECT
+public:
+
+    typedef enum
+    {
+        Rotary,
+        Slider,
+        NumericSlider
+    } ControlType;
+
+    PluginControl(QWidget *parent,
+                  QGridLayout *layout,
+                  ControlType type,
+                  PluginPort *port,
+                  AudioPluginManager *pluginManager,
+                  int index,
+                  float initialValue,
+                  bool showBounds,
+                  bool hidden);
+ 
+    void setValue(float value, bool emitSignals = true);
+    float getValue() const;
+
+    int getIndex() const { return m_index; }
+
+    void show();
+    void hide();
+
+public slots:
+    void slotValueChanged(float value);
+
+signals:
+    void valueChanged(float value);
+
+protected:
+
+    //--------------- Data members ---------------------------------
+
+    QGridLayout         *m_layout;
+
+    ControlType          m_type;
+    PluginPort          *m_port;
+
+    ::Rosegarden::Rotary              *m_dial; // we have to specify the namespace here otherwise gcc 4.1 thinks it's the enum value above
+    AudioPluginManager  *m_pluginManager;
+
+    int                  m_index;
+
+};
+
+typedef std::vector<PluginControl*>::iterator ControlIterator;
+typedef std::vector<QHBox*>::iterator ControlLineIterator;
+
+
+}
+
+#endif