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diff --git a/src/libpcp_qwt/src/qwt_plot_directpainter.h b/src/libpcp_qwt/src/qwt_plot_directpainter.h
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+/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
+ * Qwt Widget Library
+ * Copyright (C) 1997   Josef Wilgen
+ * Copyright (C) 2002   Uwe Rathmann
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the Qwt License, Version 1.0
+ *****************************************************************************/
+
+#ifndef QWT_PLOT_DIRECT_PAINTER_H
+#define QWT_PLOT_DIRECT_PAINTER_H
+
+#include "qwt_global.h"
+#include <qobject.h>
+
+class QRegion;
+class QwtPlotAbstractSeriesItem;
+
+/*!
+    \brief Painter object trying to paint incrementally
+
+    Often applications want to display samples while they are
+    collected. When there are too many samples complete replots
+    will be expensive to be processed in a collection cycle.
+
+    QwtPlotDirectPainter offers an API to paint
+    subsets ( f.e all additions points ) without erasing/repainting
+    the plot canvas.
+
+    On certain environments it might be important to calculate a proper
+    clip region before painting. F.e. for Qt Embedded only the clipped part
+    of the backing store will be copied to a ( maybe unaccelerated ) 
+    frame buffer.
+
+    \warning Incremental painting will only help when no replot is triggered
+             by another operation ( like changing scales ) and nothing needs
+             to be erased.
+*/
+class QWT_EXPORT QwtPlotDirectPainter: public QObject
+{
+public:
+    /*!
+      \brief Paint attributes
+      \sa setAttribute(), testAttribute(), drawSeries()
+    */
+    enum Attribute
+    {
+        /*!
+          Initializing a QPainter is an expensive operation.
+          When AtomicPainter is set each call of drawSeries() opens/closes
+          a temporary QPainter. Otherwise QwtPlotDirectPainter tries to
+          use the same QPainter as long as possible.
+         */
+        AtomicPainter = 0x01,
+
+        /*!
+          When FullRepaint is set the plot canvas is explicitely repainted
+          after the samples have been rendered.
+         */
+        FullRepaint = 0x02,
+
+        /*!
+          When QwtPlotCanvas::BackingStore is enabled the painter
+          has to paint to the backing store and the widget. In certain 
+          situations/environments it might be faster to paint to 
+          the backing store only and then copy the backingstore to the canvas.
+          This flag can also be useful for settings, where Qt fills the
+          the clip region with the widget background.
+         */
+        CopyBackingStore = 0x04
+    };
+
+    //! Paint attributes
+    typedef QFlags<Attribute> Attributes;
+
+    QwtPlotDirectPainter( QObject *parent = NULL );
+    virtual ~QwtPlotDirectPainter();
+
+    void setAttribute( Attribute, bool on );
+    bool testAttribute( Attribute ) const;
+
+    void setClipping( bool );
+    bool hasClipping() const;
+
+    void setClipRegion( const QRegion & );
+    QRegion clipRegion() const;
+
+    void drawSeries( QwtPlotAbstractSeriesItem *, int from, int to );
+    void reset();
+
+    virtual bool eventFilter( QObject *, QEvent * );
+
+private:
+    class PrivateData;
+    PrivateData *d_data;
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotDirectPainter::Attributes )
+
+#endif