void LoadMonitor::update()
{ // call with the mutex
int now = upTime();
if (now == mLastUpdate) // current
return;
if ((now < mLastUpdate) || (now > (mLastUpdate + 8)))
{ // way out of date
mCounts = 0;
mLatencyEvents = 0;
mLatencyMSAvg = 0;
mLatencyMSPeak = 0;
mLastUpdate = now;
return;
}
do
{ // do exponential decay
++mLastUpdate;
mCounts -= ((mCounts + 3) / 4);
mLatencyEvents -= ((mLatencyEvents + 3) / 4);
mLatencyMSAvg -= (mLatencyMSAvg / 4);
mLatencyMSPeak -= (mLatencyMSPeak / 4);
} while (mLastUpdate < now);
}
// Init X axis.
void DataPlot::initAxisX()
{
//QwtText xTitle("System Uptime [h:m:s]");
//xTitle.setFont(QFont("Ubuntu", 10));
//setAxisTitle(QwtPlot::xBottom, xTitle);
setAxisScaleDraw(QwtPlot::xBottom,new TimeScaleDraw(upTime()));
setAxisScale(QwtPlot::xBottom, 0, PLOT_SIZE );
setAxisLabelRotation(QwtPlot::xBottom, -50.0);
setAxisLabelAlignment(QwtPlot::xBottom, Qt::AlignLeft | Qt::AlignBottom);
QwtScaleWidget *scaleWidget = axisWidget(QwtPlot::xBottom);
const int fmh = QFontMetrics(scaleWidget->font()).height();
scaleWidget->setMinBorderDist(0, fmh / 2);
}
