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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 );
setRenderHint( QwtPlotItem::RenderAntialiased, true );
}
int CpuPieMarker::rtti() const
{
return QwtPlotItem::Rtti_PlotUserItem;
}
void CpuPieMarker::draw( QPainter *painter,
const QwtScaleMap &, const QwtScaleMap &,
const QRectF &rect ) const
{
const CpuPlot *cpuPlot = static_cast<CpuPlot *> ( plot() );
const QwtScaleMap yMap = cpuPlot->canvasMap( QwtPlot::yLeft );
const int margin = 5;
QRectF 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 = static_cast<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 = static_cast<int>( 5760 * curve->sample( 0 ).y() / 100.0 );
painter->save();
painter->setBrush( QBrush( curve->brush().color(), Qt::SolidPattern ) );
if ( value != 0 )
painter->drawPie( pieRect, -angle, -value );
painter->restore();
angle += value;
}
}
}
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