92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
|
#include "plot.h"
|
||
|
|
#include <qwt_plot_magnifier.h>
|
||
|
|
#include <qwt_plot_panner.h>
|
||
|
|
#include <qwt_plot_picker.h>
|
||
|
|
#include <qwt_picker_machine.h>
|
||
|
|
#include <qwt_plot_curve.h>
|
||
|
|
|
||
|
|
class DistancePicker: public QwtPlotPicker
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
DistancePicker( QWidget *canvas ):
|
||
|
|
QwtPlotPicker( canvas )
|
||
|
|
{
|
||
|
|
setTrackerMode( QwtPicker::ActiveOnly );
|
||
|
|
setStateMachine( new QwtPickerDragLineMachine() );
|
||
|
|
setRubberBand( QwtPlotPicker::PolygonRubberBand );
|
||
|
|
}
|
||
|
|
|
||
|
|
virtual QwtText trackerTextF( const QPointF &pos ) const
|
||
|
|
{
|
||
|
|
QwtText text;
|
||
|
|
|
||
|
|
const QPolygon points = selection();
|
||
|
|
if ( !points.isEmpty() )
|
||
|
|
{
|
||
|
|
QString num;
|
||
|
|
num.setNum( QLineF( pos, invTransform( points[0] ) ).length() );
|
||
|
|
|
||
|
|
QColor bg( Qt::white );
|
||
|
|
bg.setAlpha( 200 );
|
||
|
|
|
||
|
|
text.setBackgroundBrush( QBrush( bg ) );
|
||
|
|
text.setText( num );
|
||
|
|
}
|
||
|
|
return text;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
Plot::Plot( QWidget *parent ):
|
||
|
|
QwtPlot( parent ),
|
||
|
|
d_curve( NULL )
|
||
|
|
{
|
||
|
|
canvas()->setStyleSheet(
|
||
|
|
"border: 2px solid Black;"
|
||
|
|
"border-radius: 15px;"
|
||
|
|
"background-color: qlineargradient( x1: 0, y1: 0, x2: 0, y2: 1,"
|
||
|
|
"stop: 0 LemonChiffon, stop: 1 PaleGoldenrod );"
|
||
|
|
);
|
||
|
|
|
||
|
|
// attach curve
|
||
|
|
d_curve = new QwtPlotCurve( "Scattered Points" );
|
||
|
|
d_curve->setPen( QColor( "Purple" ) );
|
||
|
|
|
||
|
|
// when using QwtPlotCurve::ImageBuffer simple dots can be
|
||
|
|
// rendered in parallel on multicore systems.
|
||
|
|
d_curve->setRenderThreadCount( 0 ); // 0: use QThread::idealThreadCount()
|
||
|
|
|
||
|
|
d_curve->attach( this );
|
||
|
|
|
||
|
|
setSymbol( NULL );
|
||
|
|
|
||
|
|
// panning with the left mouse button
|
||
|
|
(void )new QwtPlotPanner( canvas() );
|
||
|
|
|
||
|
|
// zoom in/out with the wheel
|
||
|
|
QwtPlotMagnifier *magnifier = new QwtPlotMagnifier( canvas() );
|
||
|
|
magnifier->setMouseButton( Qt::NoButton );
|
||
|
|
|
||
|
|
// distanve measurement with the right mouse button
|
||
|
|
DistancePicker *picker = new DistancePicker( canvas() );
|
||
|
|
picker->setMousePattern( QwtPlotPicker::MouseSelect1, Qt::RightButton );
|
||
|
|
picker->setRubberBandPen( QPen( Qt::blue ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
void Plot::setSymbol( QwtSymbol *symbol )
|
||
|
|
{
|
||
|
|
d_curve->setSymbol( symbol );
|
||
|
|
|
||
|
|
if ( symbol == NULL )
|
||
|
|
{
|
||
|
|
d_curve->setStyle( QwtPlotCurve::Dots );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void Plot::setSamples( const QVector<QPointF> &samples )
|
||
|
|
{
|
||
|
|
d_curve->setPaintAttribute(
|
||
|
|
QwtPlotCurve::ImageBuffer, samples.size() > 1000 );
|
||
|
|
|
||
|
|
d_curve->setSamples( samples );
|
||
|
|
}
|