彻底改版2.0

third/qwtdemo/examples/cpuplot/cpuplot.h

@@ -0,0 +1,47 @@
+#include <qwt_plot.h>
+#include "cpustat.h"
+
+#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 data[id].curve;
+    }
+
+protected:
+    void timerEvent( QTimerEvent *e );
+
+private Q_SLOTS:
+    void legendChecked( const QVariant &, bool on );
+
+private:
+    void showCurve( QwtPlotItem *, bool on );
+
+    struct
+    {
+        QwtPlotCurve *curve;
+        double data[HISTORY];
+    } data[NCpuData];
+
+    double timeData[HISTORY];
+
+    int dataCount;
+    CpuStat cpuStat;
+};