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examples/oscilloscope/Plot.h

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+/*****************************************************************************
+ * Qwt Examples - Copyright (C) 2002 Uwe Rathmann
+ * This file may be used under the terms of the 3-clause BSD License
+ *****************************************************************************/
+
+#pragma once
+
+#include <QwtPlot>
+#include <QwtInterval>
+#include <QElapsedTimer>
+
+class QwtPlotCurve;
+class QwtPlotMarker;
+class QwtPlotDirectPainter;
+
+class Plot : public QwtPlot
+{
+    Q_OBJECT
+
+  public:
+    Plot( QWidget* = NULL );
+    virtual ~Plot();
+
+    void start();
+    virtual void replot() QWT_OVERRIDE;
+
+    virtual bool eventFilter( QObject*, QEvent* ) QWT_OVERRIDE;
+
+  public Q_SLOTS:
+    void setIntervalLength( double );
+
+  protected:
+    virtual void showEvent( QShowEvent* ) QWT_OVERRIDE;
+    virtual void resizeEvent( QResizeEvent* ) QWT_OVERRIDE;
+    virtual void timerEvent( QTimerEvent* ) QWT_OVERRIDE;
+
+  private:
+    void updateCurve();
+    void incrementInterval();
+
+    QwtPlotMarker* m_origin;
+    QwtPlotCurve* m_curve;
+    int m_paintedPoints;
+
+    QwtPlotDirectPainter* m_directPainter;
+
+    QwtInterval m_interval;
+    int m_timerId;
+
+    QElapsedTimer m_elapsedTimer;
+};