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diff --git a/kpovmodeler/pmviewbase.h b/kpovmodeler/pmviewbase.h
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+/*
+**************************************************************************
+                                 description
+                             --------------------
+    copyright            : (C) 2003 by Andreas Zehender
+    email                : zehender@kde.org
+**************************************************************************
+
+**************************************************************************
+*                                                                        *
+*  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.                                   *
+*                                                                        *
+**************************************************************************/
+
+#ifndef PMVIEWBASE_H
+#define PMVIEWBASE_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <qwidget.h>
+#include <qstring.h>
+
+class QDomElement;
+
+/**
+ * This class stores the view configuration for one view.
+ *
+ * Reimplement this class for each view type that has to store
+ * additional values.
+ *
+ * Created, loaded from and saved to the xml config by the corresponding
+ * @ref PMViewTypeFactory factory class.
+ */
+class PMViewOptions
+{
+public:
+   /**
+    * Returns a deep copy
+    */
+   virtual PMViewOptions* copy( ) const = 0;
+   /**
+    * Returns the identifier for the view type. Has to be equal
+    * to @ref PMViewBase::viewType for the corresponding view type.
+    */
+   virtual QString viewType( ) const = 0;
+   /**
+    * Loads the data from the xml element
+    */
+   virtual void loadData( QDomElement& e ) = 0;
+   /**
+    * Saves the data from to xml element
+    */
+   virtual void saveData( QDomElement& e ) = 0;
+};
+
+/**
+ * Base class for configuration widgets for view types
+ * for the layout settings dialog page
+ */
+class PMViewOptionsWidget : public QWidget
+{
+   Q_OBJECT
+public:
+   /**
+    * Default constructor
+    */
+   PMViewOptionsWidget( QWidget* parent, const char* name = 0 )
+         : QWidget( parent, name )
+   {
+   }
+
+signals:
+   /**
+    * Emitted when the view type description has changed
+    */
+   void viewTypeDescriptionChanged( );
+};
+
+/**
+ * Interface for views.
+ *
+ * Each view type has to implement this interface. Handles the
+ * config loading and saving
+ */
+class PMViewBase : public QWidget
+{
+	Q_OBJECT
+public:
+   /**
+    * Default constructor
+    */
+   PMViewBase( QWidget* parent, const char* name = 0, WFlags f = 0 )
+         : QWidget( parent, name, f )
+   {
+   }
+   /**
+    * Returns the identifier for the view type. Has to be unique
+    * for all view types.
+    */
+   virtual QString viewType( ) const = 0;
+   /**
+    * Returns a i18n'ed description
+    */
+   virtual QString description( ) const = 0;
+   /**
+    * Restores the view configuration
+    *
+    * Reimplement this function if the view type has to
+    * restore additional values.
+    * @see PMViewOptions
+    */
+   virtual void restoreViewConfig( PMViewOptions* ) { }
+   /**
+    * Saves the view configuration
+    *
+    * Reimplement this function if the view type has to
+    * restore additional values.
+    * @see PMViewOptions
+    */
+   virtual void saveViewConfig( PMViewOptions* ) const { }
+};
+
+#endif