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#ifndef CONSTELLATION_DISPLAY_PLOT_C
#define CONSTELLATION_DISPLAY_PLOT_C
#include <ConstellationDisplayPlot.h>
#include <qwt_scale_draw.h>
#include <qwt_legend.h>
class ConstellationDisplayZoomer: public QwtPlotZoomer
{
public:
ConstellationDisplayZoomer(QwtPlotCanvas* canvas):QwtPlotZoomer(canvas)
{
setTrackerMode(QwtPicker::AlwaysOn);
}
virtual ~ConstellationDisplayZoomer(){
}
virtual void updateTrackerText(){
updateDisplay();
}
protected:
virtual QwtText trackerText( const QwtDoublePoint& p ) const
{
QwtText t(QString("Sample %1, %2 V").arg(p.x(), 0, 'f', 0).arg(p.y(), 0, 'f', 4));
return t;
}
};
ConstellationDisplayPlot::ConstellationDisplayPlot(QWidget* parent):QwtPlot(parent){
timespec_reset(&_lastReplot);
resize(parent->width(), parent->height());
_displayIntervalTime = (1.0/10.0); // 1/10 of a second between updates
_numPoints = 1024;
_realDataPoints = new double[_numPoints];
_imagDataPoints = new double[_numPoints];
// Disable polygon clipping
QwtPainter::setDeviceClipping(false);
// We don't need the cache here
canvas()->setPaintAttribute(QwtPlotCanvas::PaintCached, false);
canvas()->setPaintAttribute(QwtPlotCanvas::PaintPacked, false);
QPalette palette;
palette.setColor(canvas()->backgroundRole(), QColor("white"));
canvas()->setPalette(palette);
setAxisScaleEngine(QwtPlot::xBottom, new QwtLinearScaleEngine);
setAxisScale(QwtPlot::xBottom, -1.0, 1.0);
setAxisTitle(QwtPlot::xBottom, "In-phase");
setAxisScaleEngine(QwtPlot::yLeft, new QwtLinearScaleEngine);
setAxisScale(QwtPlot::yLeft, -1.0, 1.0);
setAxisTitle(QwtPlot::yLeft, "Quadrature");
// Automatically deleted when parent is deleted
_plot_curve = new QwtPlotCurve("Constellation Points");
_plot_curve->attach(this);
_plot_curve->setPen(QPen(Qt::blue, 5, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
_plot_curve->setStyle(QwtPlotCurve::Dots);
_plot_curve->setRawData(_realDataPoints, _imagDataPoints, _numPoints);
memset(_realDataPoints, 0x0, _numPoints*sizeof(double));
memset(_imagDataPoints, 0x0, _numPoints*sizeof(double));
replot();
_zoomer = new ConstellationDisplayZoomer(canvas());
#if QT_VERSION < 0x040000
_zoomer->setMousePattern(QwtEventPattern::MouseSelect2,
Qt::RightButton, Qt::ControlModifier);
#else
_zoomer->setMousePattern(QwtEventPattern::MouseSelect2,
Qt::RightButton, Qt::ControlModifier);
#endif
_zoomer->setMousePattern(QwtEventPattern::MouseSelect3,
Qt::RightButton);
_panner = new QwtPlotPanner(canvas());
_panner->setAxisEnabled(QwtPlot::yRight, false);
_panner->setMouseButton(Qt::MidButton);
// Avoid jumping when labels with more/less digits
// appear/disappear when scrolling vertically
const QFontMetrics fm(axisWidget(QwtPlot::yLeft)->font());
QwtScaleDraw *sd = axisScaleDraw(QwtPlot::yLeft);
sd->setMinimumExtent( fm.width("100.00") );
const QColor c(Qt::darkRed);
_zoomer->setRubberBandPen(c);
_zoomer->setTrackerPen(c);
QwtLegend* legendDisplay = new QwtLegend(this);
legendDisplay->setItemMode(QwtLegend::CheckableItem);
insertLegend(legendDisplay);
connect(this, SIGNAL( legendChecked(QwtPlotItem *, bool ) ), this, SLOT( LegendEntryChecked(QwtPlotItem *, bool ) ));
}
ConstellationDisplayPlot::~ConstellationDisplayPlot(){
delete[] _realDataPoints;
delete[] _imagDataPoints;
// _fft_plot_curves deleted when parent deleted
// _zoomer and _panner deleted when parent deleted
}
void ConstellationDisplayPlot::replot(){
const timespec startTime = get_highres_clock();
QwtPlot::replot();
double differenceTime = (diff_timespec(get_highres_clock(), startTime));
differenceTime *= 99.0;
// Require at least a 10% duty cycle
if(differenceTime > (1.0/10.0)){
_displayIntervalTime = differenceTime;
}
}
void ConstellationDisplayPlot::PlotNewData(const double* realDataPoints, const double* imagDataPoints, const int64_t numDataPoints){
if(numDataPoints > 0){
if(numDataPoints != _numPoints){
_numPoints = numDataPoints;
delete[] _realDataPoints;
delete[] _imagDataPoints;
_realDataPoints = new double[_numPoints];
_imagDataPoints = new double[_numPoints];
_plot_curve->setRawData(_realDataPoints, _imagDataPoints, _numPoints);
}
memcpy(_realDataPoints, realDataPoints, numDataPoints*sizeof(double));
memcpy(_imagDataPoints, imagDataPoints, numDataPoints*sizeof(double));
}
// Allow at least a 50% duty cycle
if(diff_timespec(get_highres_clock(), _lastReplot) > _displayIntervalTime){
// Only replot the screen if it is visible
if(isVisible()){
replot();
}
_lastReplot = get_highres_clock();
}
}
void ConstellationDisplayPlot::LegendEntryChecked(QwtPlotItem* plotItem, bool on){
plotItem->setVisible(!on);
}
#endif /* CONSTELLATION_DISPLAY_PLOT_C */
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