PC Application: partial firmware update dialog

Software/PC_Application/qwtplotpiecewisecurve.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_PIECEWISE_CURVE_H
+#define QWT_PLOT_PIECEWISE_CURVE_H
+
+#include "qwt_plot_curve.h"
+
+/*!
+  \brief A class which draws piecewise curves
+
+  This class can be used to display data with missing (NaN) values as a
+  piecewise curve in the  x-y plane.
+*/
+class QWT_EXPORT QwtPlotPiecewiseCurve: public QwtPlotCurve
+{
+public:
+    explicit QwtPlotPiecewiseCurve();
+    explicit QwtPlotPiecewiseCurve(const QwtText &title);
+    explicit QwtPlotPiecewiseCurve(const QString &title);
+    ~QwtPlotPiecewiseCurve();
+
+    virtual void drawCurve(QPainter *p, int style,
+                           const QwtScaleMap &xMap, const QwtScaleMap &yMap,
+                           const QRectF &canvasRect, int from, int to) const override;
+
+private:
+    static bool isNaN(double x);
+};
+
+inline QwtPlotPiecewiseCurve::QwtPlotPiecewiseCurve(): QwtPlotCurve()
+{
+}
+
+inline QwtPlotPiecewiseCurve::QwtPlotPiecewiseCurve(const QwtText &title):
+    QwtPlotCurve(title)
+{
+}
+
+inline QwtPlotPiecewiseCurve::QwtPlotPiecewiseCurve(const QString &title):
+    QwtPlotCurve(title)
+{
+}
+
+inline QwtPlotPiecewiseCurve::~QwtPlotPiecewiseCurve()
+{
+
+}
+
+inline bool QwtPlotPiecewiseCurve::isNaN(double x)
+{
+    return x != x;
+}
+
+#endif