Add files from zip
This commit is contained in:
237
examples/cpuplot/CpuPlot.cpp
Normal file
237
examples/cpuplot/CpuPlot.cpp
Normal file
@@ -0,0 +1,237 @@
|
||||
/*****************************************************************************
|
||||
* Qwt Examples - Copyright (C) 2002 Uwe Rathmann
|
||||
* This file may be used under the terms of the 3-clause BSD License
|
||||
*****************************************************************************/
|
||||
|
||||
#include "CpuPieMarker.h"
|
||||
#include "CpuPlot.h"
|
||||
|
||||
#include <QwtPlotLayout>
|
||||
#include <QwtPlotCurve>
|
||||
#include <QwtScaleDraw>
|
||||
#include <QwtScaleMap>
|
||||
#include <QwtScaleWidget>
|
||||
#include <QwtLegend>
|
||||
#include <QwtLegendLabel>
|
||||
#include <QwtPlotCanvas>
|
||||
|
||||
#include <QPainter>
|
||||
|
||||
namespace
|
||||
{
|
||||
class TimeScaleDraw : public QwtScaleDraw
|
||||
{
|
||||
public:
|
||||
TimeScaleDraw( const QTime& base )
|
||||
: baseTime( base )
|
||||
{
|
||||
}
|
||||
virtual QwtText label( double v ) const QWT_OVERRIDE
|
||||
{
|
||||
QTime upTime = baseTime.addSecs( static_cast< int >( v ) );
|
||||
return upTime.toString();
|
||||
}
|
||||
private:
|
||||
QTime baseTime;
|
||||
};
|
||||
|
||||
class Background : public QwtPlotItem
|
||||
{
|
||||
public:
|
||||
Background()
|
||||
{
|
||||
setZ( 0.0 );
|
||||
}
|
||||
|
||||
virtual int rtti() const QWT_OVERRIDE
|
||||
{
|
||||
return QwtPlotItem::Rtti_PlotUserItem;
|
||||
}
|
||||
|
||||
virtual void draw( QPainter* painter,
|
||||
const QwtScaleMap&, const QwtScaleMap& yMap,
|
||||
const QRectF& canvasRect ) const QWT_OVERRIDE
|
||||
{
|
||||
QColor c( Qt::white );
|
||||
QRectF r = canvasRect;
|
||||
|
||||
for ( int i = 100; i > 0; i -= 10 )
|
||||
{
|
||||
r.setBottom( yMap.transform( i - 10 ) );
|
||||
r.setTop( yMap.transform( i ) );
|
||||
painter->fillRect( r, c );
|
||||
|
||||
c = c.darker( 110 );
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
class CpuCurve : public QwtPlotCurve
|
||||
{
|
||||
public:
|
||||
CpuCurve( const QString& title )
|
||||
: QwtPlotCurve( title )
|
||||
{
|
||||
setRenderHint( QwtPlotItem::RenderAntialiased );
|
||||
}
|
||||
|
||||
void setColor( const QColor& color )
|
||||
{
|
||||
QColor c = color;
|
||||
c.setAlpha( 150 );
|
||||
|
||||
setPen( QPen( Qt::NoPen ) );
|
||||
setBrush( c );
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
CpuPlot::CpuPlot( QWidget* parent )
|
||||
: QwtPlot( parent )
|
||||
, m_dataCount( 0 )
|
||||
{
|
||||
using namespace QwtAxis;
|
||||
|
||||
setAutoReplot( false );
|
||||
|
||||
QwtPlotCanvas* canvas = new QwtPlotCanvas();
|
||||
canvas->setBorderRadius( 10 );
|
||||
|
||||
setCanvas( canvas );
|
||||
|
||||
plotLayout()->setAlignCanvasToScales( true );
|
||||
|
||||
QwtLegend* legend = new QwtLegend;
|
||||
legend->setDefaultItemMode( QwtLegendData::Checkable );
|
||||
insertLegend( legend, QwtPlot::RightLegend );
|
||||
|
||||
setAxisTitle( XBottom, " System Uptime [h:m:s]" );
|
||||
setAxisScaleDraw( XBottom, new TimeScaleDraw( m_cpuStat.upTime() ) );
|
||||
setAxisScale( XBottom, 0, HISTORY );
|
||||
setAxisLabelRotation( XBottom, -50.0 );
|
||||
setAxisLabelAlignment( XBottom, Qt::AlignLeft | Qt::AlignBottom );
|
||||
|
||||
/*
|
||||
In situations, when there is a label at the most right position of the
|
||||
scale, additional space is needed to display the overlapping part
|
||||
of the label would be taken by reducing the width of scale and canvas.
|
||||
To avoid this "jumping canvas" effect, we add a permanent margin.
|
||||
We don't need to do the same for the left border, because there
|
||||
is enough space for the overlapping label below the left scale.
|
||||
*/
|
||||
|
||||
QwtScaleWidget* scaleWidget = axisWidget( XBottom );
|
||||
const int fmh = QFontMetrics( scaleWidget->font() ).height();
|
||||
scaleWidget->setMinBorderDist( 0, fmh / 2 );
|
||||
|
||||
setAxisTitle( YLeft, "Cpu Usage [%]" );
|
||||
setAxisScale( YLeft, 0, 100 );
|
||||
|
||||
Background* bg = new Background();
|
||||
bg->attach( this );
|
||||
|
||||
CpuPieMarker* pie = new CpuPieMarker();
|
||||
pie->attach( this );
|
||||
|
||||
CpuCurve* curve;
|
||||
|
||||
curve = new CpuCurve( "System" );
|
||||
curve->setColor( Qt::red );
|
||||
curve->attach( this );
|
||||
m_data[System].curve = curve;
|
||||
|
||||
curve = new CpuCurve( "User" );
|
||||
curve->setColor( Qt::blue );
|
||||
curve->setZ( curve->z() - 1 );
|
||||
curve->attach( this );
|
||||
m_data[User].curve = curve;
|
||||
|
||||
curve = new CpuCurve( "Total" );
|
||||
curve->setColor( Qt::black );
|
||||
curve->setZ( curve->z() - 2 );
|
||||
curve->attach( this );
|
||||
m_data[Total].curve = curve;
|
||||
|
||||
curve = new CpuCurve( "Idle" );
|
||||
curve->setColor( Qt::darkCyan );
|
||||
curve->setZ( curve->z() - 3 );
|
||||
curve->attach( this );
|
||||
m_data[Idle].curve = curve;
|
||||
|
||||
showCurve( m_data[System].curve, true );
|
||||
showCurve( m_data[User].curve, true );
|
||||
showCurve( m_data[Total].curve, false );
|
||||
showCurve( m_data[Idle].curve, false );
|
||||
|
||||
for ( int i = 0; i < HISTORY; i++ )
|
||||
m_timeData[HISTORY - 1 - i] = i;
|
||||
|
||||
( void )startTimer( 1000 ); // 1 second
|
||||
|
||||
connect( legend, SIGNAL(checked(const QVariant&,bool,int)),
|
||||
SLOT(legendChecked(const QVariant&,bool)) );
|
||||
}
|
||||
|
||||
void CpuPlot::timerEvent( QTimerEvent* )
|
||||
{
|
||||
for ( int i = m_dataCount; i > 0; i-- )
|
||||
{
|
||||
for ( int c = 0; c < NCpuData; c++ )
|
||||
{
|
||||
if ( i < HISTORY )
|
||||
m_data[c].data[i] = m_data[c].data[i - 1];
|
||||
}
|
||||
}
|
||||
|
||||
m_cpuStat.statistic( m_data[User].data[0], m_data[System].data[0] );
|
||||
|
||||
m_data[Total].data[0] = m_data[User].data[0] + m_data[System].data[0];
|
||||
m_data[Idle].data[0] = 100.0 - m_data[Total].data[0];
|
||||
|
||||
if ( m_dataCount < HISTORY )
|
||||
m_dataCount++;
|
||||
|
||||
for ( int j = 0; j < HISTORY; j++ )
|
||||
m_timeData[j]++;
|
||||
|
||||
setAxisScale( QwtAxis::XBottom,
|
||||
m_timeData[HISTORY - 1], m_timeData[0] );
|
||||
|
||||
for ( int c = 0; c < NCpuData; c++ )
|
||||
{
|
||||
m_data[c].curve->setRawSamples(
|
||||
m_timeData, m_data[c].data, m_dataCount );
|
||||
}
|
||||
|
||||
replot();
|
||||
}
|
||||
|
||||
void CpuPlot::legendChecked( const QVariant& itemInfo, bool on )
|
||||
{
|
||||
QwtPlotItem* plotItem = infoToItem( itemInfo );
|
||||
if ( plotItem )
|
||||
showCurve( plotItem, on );
|
||||
}
|
||||
|
||||
void CpuPlot::showCurve( QwtPlotItem* item, bool on )
|
||||
{
|
||||
item->setVisible( on );
|
||||
|
||||
QwtLegend* lgd = qobject_cast< QwtLegend* >( legend() );
|
||||
|
||||
QList< QWidget* > legendWidgets =
|
||||
lgd->legendWidgets( itemToInfo( item ) );
|
||||
|
||||
if ( legendWidgets.size() == 1 )
|
||||
{
|
||||
QwtLegendLabel* legendLabel =
|
||||
qobject_cast< QwtLegendLabel* >( legendWidgets[0] );
|
||||
|
||||
if ( legendLabel )
|
||||
legendLabel->setChecked( on );
|
||||
}
|
||||
|
||||
replot();
|
||||
}
|
||||
|
||||
#include "moc_CpuPlot.cpp"
|
||||
Reference in New Issue
Block a user