新增qwt源码版本

qwtdemo/examples/cpuplot/cpustat.h

@@ -0,0 +1,23 @@
+#include <qdatetime.h>
+
+class CpuStat
+{
+public:
+    CpuStat();
+    void statistic( double &user, double &system );
+    QTime upTime() const;
+
+    enum Value
+    {
+        User,
+        Nice,
+        System,
+        Idle,
+
+        NValues
+    };
+
+private:
+    void lookUp( double[NValues] ) const;
+    double procValues[NValues];
+};