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diff --git a/src/libpcp_qwt/src/qwt_plot_canvas.h b/src/libpcp_qwt/src/qwt_plot_canvas.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_CANVAS_H
+#define QWT_PLOT_CANVAS_H
+
+#include "qwt_global.h"
+#include <qframe.h>
+#include <qpen.h>
+#include <qpainterpath.h>
+#include <qbitmap.h>
+
+class QwtPlot;
+class QPixmap;
+
+/*!
+  \brief Canvas of a QwtPlot.
+  
+   Canvas is the widget where all plot items are displayed
+
+  \sa QwtPlot
+*/
+class QWT_EXPORT QwtPlotCanvas : public QFrame
+{
+    Q_OBJECT
+
+public:
+
+    /*!
+      \brief Paint attributes
+
+      The default setting enables BackingStore and Opaque.
+
+      \sa setPaintAttribute(), testPaintAttribute()
+     */
+    enum PaintAttribute
+    {
+        /*!
+          \brief Paint double buffered reusing the content 
+                 of the pixmap buffer when possible. 
+
+          Using a backing store might improve the performance
+          significantly, when workin with widget overlays ( like rubberbands ).
+          Disabling the cache might improve the performance for
+          incremental paints (using QwtPlotDirectPainter ).
+
+          \sa backingStore(), invalidateBackingStore()
+         */
+        BackingStore = 1,
+
+        /*!
+          \brief Try to fill the complete contents rectangle
+                 of the plot canvas
+
+          When using styled backgrounds Qt assumes, that the
+          canvas doesn't fill its area completely 
+          ( f.e because of rounded borders ) and fills the area
+          below the canvas. When this is done with gradients it might
+          result in a serious performance bottleneck - depending on the size.
+
+          When the Opaque attribute is enabled the canvas tries to
+          identify the gaps with some heuristics and to fill those only. 
+
+          \warning Will not work for semitransparent backgrounds 
+         */
+        Opaque       = 2,
+
+        /*!
+          \brief Try to improve painting of styled backgrounds
+
+          QwtPlotCanvas supports the box model attributes for
+          customizing the layout with style sheets. Unfortunately
+          the design of Qt style sheets has no concept how to
+          handle backgrounds with rounded corners - beside of padding.
+
+          When HackStyledBackground is enabled the plot canvas tries
+          to seperate the background from the background border
+          by reverse engeneering to paint the background before and
+          the border after the plot items. In this order the border
+          gets prefectly antialiased and you can avoid some pixel
+          artifacts in the corners.
+         */
+        HackStyledBackground = 4,
+
+        /*!
+          When ImmediatePaint is set replot() calls repaint()
+          instead of update().
+
+          \sa replot(), QWidget::repaint(), QWidget::update()
+         */
+        ImmediatePaint = 8
+    };
+
+    //! Paint attributes
+    typedef QFlags<PaintAttribute> PaintAttributes;
+
+    /*!
+      \brief Focus indicator
+      The default setting is NoFocusIndicator
+      \sa setFocusIndicator(), focusIndicator(), paintFocus()
+    */
+
+    enum FocusIndicator
+    {
+        //! Don't paint a focus indicator
+        NoFocusIndicator,
+
+        /*!
+          The focus is related to the complete canvas.
+          Paint the focus indicator using paintFocus()
+         */
+        CanvasFocusIndicator,
+
+        /*!
+          The focus is related to an item (curve, point, ...) on
+          the canvas. It is up to the application to display a
+          focus indication using f.e. highlighting.
+         */
+        ItemFocusIndicator
+    };
+
+    explicit QwtPlotCanvas( QwtPlot * );
+    virtual ~QwtPlotCanvas();
+
+    QwtPlot *plot();
+    const QwtPlot *plot() const;
+
+    void setFocusIndicator( FocusIndicator );
+    FocusIndicator focusIndicator() const;
+
+    void setBorderRadius( double );
+    double borderRadius() const;
+
+    QPainterPath borderPath( const QRect &rect ) const;
+    QBitmap borderMask( const QSize & ) const;
+
+    void setPaintAttribute( PaintAttribute, bool on = true );
+    bool testPaintAttribute( PaintAttribute ) const;
+
+    const QPixmap *backingStore() const;
+    void invalidateBackingStore();
+
+    void replot();
+
+    virtual bool event( QEvent * );
+
+protected:
+    virtual void paintEvent( QPaintEvent * );
+    virtual void resizeEvent( QResizeEvent * );
+
+    virtual void drawFocusIndicator( QPainter * );
+    virtual void drawBorder( QPainter * );
+
+    void updateStyleSheetInfo();
+
+private:
+    void drawCanvas( QPainter *, bool withBackground );
+
+    class PrivateData;
+    PrivateData *d_data;
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS( QwtPlotCanvas::PaintAttributes )
+
+#endif