62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
/*****************************************************************************
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* Qwt Examples - Copyright (C) 2002 Uwe Rathmann
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* This file may be used under the terms of the 3-clause BSD License
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*****************************************************************************/
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#include "CpuPlot.h"
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#include "CpuPieMarker.h"
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#include <QwtScaleMap>
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#include <QwtPlotCurve>
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#include <QPainter>
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CpuPieMarker::CpuPieMarker()
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{
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setZ( 1000 );
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setRenderHint( QwtPlotItem::RenderAntialiased, true );
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}
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int CpuPieMarker::rtti() const
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{
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return QwtPlotItem::Rtti_PlotUserItem;
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}
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void CpuPieMarker::draw( QPainter* painter,
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const QwtScaleMap&, const QwtScaleMap&,
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const QRectF& rect ) const
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{
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const CpuPlot* cpuPlot = static_cast< CpuPlot* > ( plot() );
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const QwtScaleMap yMap = cpuPlot->canvasMap( QwtAxis::YLeft );
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const int margin = 5;
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QRectF pieRect;
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pieRect.setX( rect.x() + margin );
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pieRect.setY( rect.y() + margin );
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pieRect.setHeight( yMap.transform( 80.0 ) );
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pieRect.setWidth( pieRect.height() );
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const int dataType[] = { CpuPlot::User, CpuPlot::System, CpuPlot::Idle };
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int angle = static_cast< int >( 5760 * 0.75 );
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for ( unsigned int i = 0;
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i < sizeof( dataType ) / sizeof( dataType[0] ); i++ )
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{
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const QwtPlotCurve* curve = cpuPlot->cpuCurve( dataType[i] );
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if ( curve->dataSize() > 0 )
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{
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const int value = static_cast< int >( 5760 * curve->sample( 0 ).y() / 100.0 );
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painter->save();
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painter->setBrush( QBrush( curve->brush().color(), Qt::SolidPattern ) );
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if ( value != 0 )
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painter->drawPie( pieRect, -angle, -value );
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painter->restore();
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angle += value;
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}
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}
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}
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