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#include <qpainter.h>
#include <qwt_scale_map.h>
#include <qwt_plot_curve.h>
#include "cpuplot.h"
#include "cpupiemarker.h"
CpuPieMarker::CpuPieMarker()
{
setZ(1000);
#if QT_VERSION >= 0x040000
setRenderHint(QwtPlotItem::RenderAntialiased, true);
#endif
}
int CpuPieMarker::rtti() const
{
return QwtPlotItem::Rtti_PlotUserItem;
}
void CpuPieMarker::draw(QPainter *p,
const QwtScaleMap &, const QwtScaleMap &,
const QRect &rect) const
{
const CpuPlot *cpuPlot = (CpuPlot *)plot();
const QwtScaleMap yMap = cpuPlot->canvasMap(QwtPlot::yLeft);
const int margin = 5;
QRect pieRect;
pieRect.setX(rect.x() + margin);
pieRect.setY(rect.y() + margin);
pieRect.setHeight(yMap.transform(80.0));
pieRect.setWidth(pieRect.height());
const int dataType[] = { CpuPlot::User, CpuPlot::System, CpuPlot::Idle };
int angle = (int)(5760 * 0.75);
for ( unsigned int i = 0;
i < sizeof(dataType) / sizeof(dataType[0]); i++ )
{
const QwtPlotCurve *curve = cpuPlot->cpuCurve(dataType[i]);
if ( curve->dataSize() > 0 )
{
const int value = (int)(5760 * curve->y(0) / 100.0);
p->save();
p->setBrush(QBrush(curve->pen().color(), Qt::SolidPattern));
if ( value != 0 )
p->drawPie(pieRect, -angle, -value);
p->restore();
angle += value;
}
}
}
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