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examples/cpuplot/CpuPlot.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 "CpuStat.h"
+#include <QwtPlot>
+
+#define HISTORY 60 // seconds
+
+class QwtPlotCurve;
+
+class CpuPlot : public QwtPlot
+{
+    Q_OBJECT
+  public:
+    enum CpuData
+    {
+        User,
+        System,
+        Total,
+        Idle,
+
+        NCpuData
+    };
+
+    CpuPlot( QWidget* = 0 );
+    const QwtPlotCurve* cpuCurve( int id ) const
+    {
+        return m_data[id].curve;
+    }
+
+  protected:
+    void timerEvent( QTimerEvent* ) QWT_OVERRIDE;
+
+  private Q_SLOTS:
+    void legendChecked( const QVariant&, bool on );
+
+  private:
+    void showCurve( QwtPlotItem*, bool on );
+
+    struct
+    {
+        QwtPlotCurve* curve;
+        double data[HISTORY];
+    } m_data[NCpuData];
+
+    double m_timeData[HISTORY];
+
+    int m_dataCount;
+    CpuStat m_cpuStat;
+};