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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.
+
+    This file Copyright 2006 Martin Shepherd <[email protected]>.
+
+    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_ROSEGARDENPARAMETERAREA_H_
+#define _RG_ROSEGARDENPARAMETERAREA_H_
+
+#include <qwidgetstack.h>
+#include <vector>
+
+
+class QWidget;
+class QVGroupBox;
+class QVBox;
+class QScrollView;
+class KTabWidget;
+
+
+namespace Rosegarden
+{
+
+class RosegardenParameterBox;
+
+
+/**
+ * A widget that arranges a set of Rosegarden parameter-box widgets
+ * within a frame, in a dynamically configurable manner.
+ */
+class RosegardenParameterArea : public QWidgetStack
+{
+    Q_OBJECT
+public:
+
+    // Create the parameter display area.
+
+    RosegardenParameterArea(QWidget *parent=0, const char *name=0, WFlags f=0);
+
+    // Add a rosegarden parameter box to the list that are to be displayed.
+
+    void addRosegardenParameterBox(RosegardenParameterBox *b);
+
+
+    // List the supported methods of arranging the various parameter-box
+    // widgets within the parameter area.
+
+    enum Arrangement {
+        CLASSIC_STYLE,  // A simple vertical tiling of parameter-box widgets.
+        TAB_BOX_STYLE   // A horizontal list of tabs, displaying one box at a time.
+    };
+
+    // Redisplay the widgets with a different layout style.
+
+    void setArrangement(Arrangement style);
+
+protected:
+private:
+    Arrangement m_style;                // The current layout style.
+
+    // The list of parameter box widgets that are being displayed by this
+    // widget.
+
+    std::vector<RosegardenParameterBox *>  m_parameterBoxes;
+
+    // Create a parallel array of group boxes, to be used when the
+    // corresponding parameter box widget needs to be enclosed by a
+    // titled outline.
+
+    std::vector<QVGroupBox *> m_groupBoxes;
+
+    // Move a RosegardenParameterBox widget from one container to another.
+
+    void moveWidget(QWidget *old_container, QWidget *new_container,
+                    RosegardenParameterBox *box);
+
+    QScrollView *m_scrollView; // Holds the m_classic container
+    QVBox *m_classic;          // The container widget for m_style==CLASSIC_STYLE.
+    KTabWidget *m_tabBox;     // The container widget for m_style==TAB_BOX_STYLE.
+    QWidget *m_active;         // The current container widget.
+    QWidget *m_spacing;
+};
+
+
+}
+
+#endif