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https://github.com/GoldenCheetah/GoldenCheetah.git
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2f9130cd76
Upgrade to QWT 6.0.1, but still uses a locally patched copy since support for 8 axes has not been included, despite it being a relatively simple patch. Fixes #634. Fixes #567.
106 lines
2.6 KiB
C++
106 lines
2.6 KiB
C++
#include <qwt_plot.h>
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#include <qwt_plot_canvas.h>
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#include <qwt_plot_curve.h>
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#include <qwt_symbol.h>
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#include <qwt_plot_directpainter.h>
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#include "incrementalplot.h"
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#include <qpaintengine.h>
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class CurveData: public QwtArraySeriesData<QPointF>
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{
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public:
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CurveData()
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{
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}
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virtual QRectF boundingRect() const
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{
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if ( d_boundingRect.width() < 0.0 )
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d_boundingRect = qwtBoundingRect( *this );
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return d_boundingRect;
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}
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inline void append( const QPointF &point )
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{
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d_samples += point;
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}
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void clear()
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{
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d_samples.clear();
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d_samples.squeeze();
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d_boundingRect = QRectF( 0.0, 0.0, -1.0, -1.0 );
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}
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};
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IncrementalPlot::IncrementalPlot(QWidget *parent):
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QwtPlot(parent),
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d_curve(NULL)
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{
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d_directPainter = new QwtPlotDirectPainter(this);
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#if defined(Q_WS_X11)
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canvas()->setAttribute(Qt::WA_PaintOutsidePaintEvent, true);
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canvas()->setAttribute(Qt::WA_PaintOnScreen, true);
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#endif
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d_curve = new QwtPlotCurve("Test Curve");
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d_curve->setStyle(QwtPlotCurve::NoCurve);
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d_curve->setData( new CurveData() );
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d_curve->setSymbol(new QwtSymbol(QwtSymbol::XCross,
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Qt::NoBrush, QPen(Qt::white), QSize( 4, 4 ) ) );
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d_curve->attach(this);
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setAutoReplot(false);
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}
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IncrementalPlot::~IncrementalPlot()
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{
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delete d_curve;
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}
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void IncrementalPlot::appendPoint( const QPointF &point )
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{
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CurveData *data = static_cast<CurveData *>( d_curve->data() );
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data->append(point);
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const bool doClip = !canvas()->testAttribute( Qt::WA_PaintOnScreen );
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if ( doClip )
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{
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/*
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Depending on the platform setting a clip might be an important
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performance issue. F.e. for Qt Embedded this reduces the
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part of the backing store that has to be copied out - maybe
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to an unaccelerated frame buffer device.
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*/
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const QwtScaleMap xMap = canvasMap( d_curve->xAxis() );
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const QwtScaleMap yMap = canvasMap( d_curve->yAxis() );
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QRegion clipRegion;
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const QSize symbolSize = d_curve->symbol()->size();
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QRect r( 0, 0, symbolSize.width() + 2, symbolSize.height() + 2 );
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const QPointF center =
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QwtScaleMap::transform( xMap, yMap, point );
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r.moveCenter( center.toPoint() );
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clipRegion += r;
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d_directPainter->setClipRegion( clipRegion );
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}
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d_directPainter->drawSeries(d_curve,
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data->size() - 1, data->size() - 1);
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}
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void IncrementalPlot::clearPoints()
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{
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CurveData *data = static_cast<CurveData *>( d_curve->data() );
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data->clear();
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replot();
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}
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