git.gag.com Git - debian/gnuradio/blob - gr-qtgui/src/lib/FrequencyDisplayPlot.cc

   1 #ifndef FREQUENCY_DISPLAY_PLOT_C
   2 #define FREQUENCY_DISPLAY_PLOT_C
   3
   4 #include <FrequencyDisplayPlot.h>
   5
   6 #include <qwt_scale_draw.h>
   7
   8 class FreqPrecisionClass
   9 {
  10 public:
  11   FreqPrecisionClass(const int freqPrecision)
  12   {
  13     _frequencyPrecision = freqPrecision;
  14   }
  15
  16   virtual ~FreqPrecisionClass()
  17   {
  18   }
  19
  20   virtual unsigned int GetFrequencyPrecision() const
  21   {
  22     return _frequencyPrecision;
  23   }
  24
  25   virtual void SetFrequencyPrecision(const unsigned int newPrecision)
  26   {
  27     _frequencyPrecision = newPrecision;
  28   }
  29 protected:
  30   unsigned int _frequencyPrecision;
  31
  32 private:
  33
  34 };
  35
  36 class FreqDisplayScaleDraw: public QwtScaleDraw, public FreqPrecisionClass
  37 {
  38 public:
  39   FreqDisplayScaleDraw(const unsigned int precision)
  40     : QwtScaleDraw(), FreqPrecisionClass(precision)
  41   {
  42   }
  43
  44   virtual ~FreqDisplayScaleDraw()
  45   {
  46   }
  47
  48   virtual QwtText label(double value) const
  49   {
  50     return QString("%1").arg(value, 0, 'f', GetFrequencyPrecision());
  51   }
  52
  53 protected:
  54
  55 private:
  56
  57 };
  58
  59 class FreqDisplayZoomer: public QwtPlotZoomer, public FreqPrecisionClass
  60 {
  61 public:
  62   FreqDisplayZoomer(QwtPlotCanvas* canvas, const unsigned int freqPrecision)
  63     : QwtPlotZoomer(canvas),FreqPrecisionClass(freqPrecision)
  64   {
  65     setTrackerMode(QwtPicker::AlwaysOn);
  66   }
  67
  68   virtual ~FreqDisplayZoomer(){
  69
  70   }
  71
  72   virtual void updateTrackerText(){
  73     updateDisplay();
  74   }
  75
  76   void SetUnitType(const std::string &type)
  77   {
  78     _unitType = type;
  79   }
  80
  81 protected:
  82   virtual QwtText trackerText( const QwtDoublePoint& p ) const
  83   {
  84     QwtText t(QString("%1 %2, %3 dB").
  85               arg(p.x(), 0, 'f', GetFrequencyPrecision()).
  86               arg(_unitType.c_str()).arg(p.y(), 0, 'f', 2));
  87     return t;
  88   }
  89
  90 private:
  91   std::string _unitType;
  92 };
  93
  94 FrequencyDisplayPlot::FrequencyDisplayPlot(QWidget* parent)
  95   : QwtPlot(parent)
  96 {
  97   _startFrequency = 0;
  98   _stopFrequency = 4000;
  99
 100   timespec_reset(&_lastReplot);
 101
 102   resize(parent->width(), parent->height());
 103
 104   _useCenterFrequencyFlag = false;
 105
 106   _numPoints = 1024;
 107   _dataPoints = new double[_numPoints];
 108   _minFFTPoints = new double[_numPoints];
 109   _maxFFTPoints = new double[_numPoints];
 110   _xAxisPoints = new double[_numPoints];
 111
 112   // Disable polygon clipping
 113   QwtPainter::setDeviceClipping(false);
 114
 115   // We don't need the cache here
 116   canvas()->setPaintAttribute(QwtPlotCanvas::PaintCached, false);
 117   canvas()->setPaintAttribute(QwtPlotCanvas::PaintPacked, false);
 118
 119   QPalette palette;
 120   palette.setColor(canvas()->backgroundRole(), QColor("white"));
 121   canvas()->setPalette(palette);
 122
 123   setAxisTitle(QwtPlot::xBottom, "Frequency (Hz)");
 124   setAxisScaleDraw(QwtPlot::xBottom, new FreqDisplayScaleDraw(0));
 125
 126   _minYAxis = -120;
 127   _maxYAxis = 10;
 128   setAxisScaleEngine(QwtPlot::yLeft, new QwtLinearScaleEngine);
 129   setAxisScale(QwtPlot::yLeft, _minYAxis, _maxYAxis);
 130   setAxisTitle(QwtPlot::yLeft, "Power (dB)");
 131
 132   // Automatically deleted when parent is deleted
 133   _fft_plot_curve = new QwtPlotCurve("Power Spectrum");
 134   _fft_plot_curve->attach(this);
 135   _fft_plot_curve->setPen(QPen(Qt::blue));
 136   _fft_plot_curve->setRawData(_xAxisPoints, _dataPoints, _numPoints);
 137
 138   _min_fft_plot_curve = new QwtPlotCurve("Minimum Power");
 139   _min_fft_plot_curve->attach(this);
 140   _min_fft_plot_curve->setPen(QPen(Qt::magenta));
 141   _min_fft_plot_curve->setRawData(_xAxisPoints, _minFFTPoints, _numPoints);
 142   _min_fft_plot_curve->setVisible(false);
 143
 144   _max_fft_plot_curve = new QwtPlotCurve("Maximum Power");
 145   _max_fft_plot_curve->attach(this);
 146   _max_fft_plot_curve->setPen(QPen(Qt::darkYellow));
 147   _max_fft_plot_curve->setRawData(_xAxisPoints, _maxFFTPoints, _numPoints);
 148   _max_fft_plot_curve->setVisible(false);
 149
 150   _lower_intensity_marker = new QwtPlotMarker();
 151   _lower_intensity_marker->setLineStyle(QwtPlotMarker::HLine);
 152   _lower_intensity_marker->setLinePen(QPen(Qt::cyan));
 153   _lower_intensity_marker->attach(this);
 154
 155   _upper_intensity_marker = new QwtPlotMarker();
 156   _upper_intensity_marker->setLineStyle(QwtPlotMarker::HLine);
 157   _upper_intensity_marker->setLinePen(QPen(Qt::green, 0, Qt::DotLine));
 158   _upper_intensity_marker->attach(this);
 159
 160   memset(_dataPoints, 0x0, _numPoints*sizeof(double));
 161   memset(_xAxisPoints, 0x0, _numPoints*sizeof(double));
 162
 163   for(int64_t number = 0; number < _numPoints; number++){
 164     _minFFTPoints[number] = 200.0;
 165     _maxFFTPoints[number] = -280.0;
 166   }
 167
 168   // set up peak marker
 169   QwtSymbol symbol;
 170
 171   _markerPeakAmplitude = new QwtPlotMarker();
 172   _markerPeakAmplitude->setLinePen(QPen(Qt::yellow));
 173   symbol.setStyle(QwtSymbol::Diamond);
 174   symbol.setSize(8);
 175   symbol.setPen(QPen(Qt::yellow));
 176   symbol.setBrush(QBrush(Qt::yellow));
 177   _markerPeakAmplitude->setSymbol(symbol);
 178   _markerPeakAmplitude->attach(this);
 179
 180   _markerNoiseFloorAmplitude = new QwtPlotMarker();
 181   _markerNoiseFloorAmplitude->setLineStyle(QwtPlotMarker::HLine);
 182   _markerNoiseFloorAmplitude->setLinePen(QPen(Qt::darkRed, 0, Qt::DotLine));
 183   _markerNoiseFloorAmplitude->attach(this);
 184
 185   _peakFrequency = 0;
 186   _peakAmplitude = -HUGE_VAL;
 187
 188   _noiseFloorAmplitude = -HUGE_VAL;
 189
 190   replot();
 191
 192   _zoomer = new FreqDisplayZoomer(canvas(), 0);
 193 #if QT_VERSION < 0x040000
 194   _zoomer->setMousePattern(QwtEventPattern::MouseSelect2,
 195                           Qt::RightButton, Qt::ControlModifier);
 196 #else
 197   _zoomer->setMousePattern(QwtEventPattern::MouseSelect2,
 198                           Qt::RightButton, Qt::ControlModifier);
 199 #endif
 200   _zoomer->setMousePattern(QwtEventPattern::MouseSelect3,
 201                           Qt::RightButton);
 202
 203   _panner = new QwtPlotPanner(canvas());
 204   _panner->setAxisEnabled(QwtPlot::yRight, false);
 205   _panner->setMouseButton(Qt::MidButton);
 206
 207   // Avoid jumping when labels with more/less digits
 208   // appear/disappear when scrolling vertically
 209
 210   const QFontMetrics fm(axisWidget(QwtPlot::yLeft)->font());
 211   QwtScaleDraw *sd = axisScaleDraw(QwtPlot::yLeft);
 212   sd->setMinimumExtent( fm.width("100.00") );
 213
 214   const QColor c(Qt::darkRed);
 215   _zoomer->setRubberBandPen(c);
 216   _zoomer->setTrackerPen(c);
 217
 218   // Do this after the zoomer has been built
 219   _resetXAxisPoints();
 220 }
 221
 222 FrequencyDisplayPlot::~FrequencyDisplayPlot()
 223 {
 224   delete[] _dataPoints;
 225   delete[] _maxFFTPoints;
 226   delete[] _minFFTPoints;
 227   delete[] _xAxisPoints;
 228
 229   // _fft_plot_curves deleted when parent deleted
 230   // _zoomer and _panner deleted when parent deleted
 231 }
 232
 233 void
 234 FrequencyDisplayPlot::set_yaxis(double min, double max)
 235 {
 236   // Get the new max/min values for the plot
 237   _minYAxis = min;
 238   _maxYAxis = max;
 239
 240   // Set the axis max/min to the new values
 241   setAxisScale(QwtPlot::yLeft, _minYAxis, _maxYAxis);
 242
 243   // Reset the base zoom level to the new axis scale set here
 244   _zoomer->setZoomBase();
 245 }
 246
 247 void
 248 FrequencyDisplayPlot::SetFrequencyRange(const double constStartFreq,
 249                                         const double constStopFreq,
 250                                         const double constCenterFreq,
 251                                         const bool useCenterFrequencyFlag,
 252                                         const double units, const std::string &strunits)
 253 {
 254   double startFreq = constStartFreq / units;
 255   double stopFreq = constStopFreq / units;
 256   double centerFreq = constCenterFreq / units;
 257
 258   _useCenterFrequencyFlag = useCenterFrequencyFlag;
 259
 260   if(_useCenterFrequencyFlag){
 261     startFreq = (startFreq + centerFreq);
 262     stopFreq = (stopFreq + centerFreq);
 263   }
 264
 265   bool reset = false;
 266   if((startFreq != _startFrequency) || (stopFreq != _stopFrequency))
 267     reset = true;
 268
 269   if(stopFreq > startFreq) {
 270     _startFrequency = startFreq;
 271     _stopFrequency = stopFreq;
 272
 273     if((axisScaleDraw(QwtPlot::xBottom) != NULL) && (_zoomer != NULL)){
 274       double display_units = ceil(log10(units)/2.0);
 275       setAxisScaleDraw(QwtPlot::xBottom, new FreqDisplayScaleDraw(display_units));
 276       setAxisTitle(QwtPlot::xBottom, QString("Frequency (%1)").arg(strunits.c_str()));
 277
 278       if(reset)
 279         _resetXAxisPoints();
 280
 281       ((FreqDisplayZoomer*)_zoomer)->SetFrequencyPrecision(display_units);
 282       ((FreqDisplayZoomer*)_zoomer)->SetUnitType(strunits);
 283     }
 284   }
 285 }
 286
 287
 288 double
 289 FrequencyDisplayPlot::GetStartFrequency() const
 290 {
 291   return _startFrequency;
 292 }
 293
 294 double
 295 FrequencyDisplayPlot::GetStopFrequency() const
 296 {
 297   return _stopFrequency;
 298 }
 299
 300 void
 301 FrequencyDisplayPlot::replot()
 302 {
 303   _markerNoiseFloorAmplitude->setYValue(_noiseFloorAmplitude);
 304
 305   // Make sure to take into account the start frequency
 306   if(_useCenterFrequencyFlag){
 307     _markerPeakAmplitude->setXValue((_peakFrequency/1000.0) + _startFrequency);
 308   }
 309   else{
 310     _markerPeakAmplitude->setXValue(_peakFrequency + _startFrequency);
 311   }
 312   _markerPeakAmplitude->setYValue(_peakAmplitude);
 313
 314   QwtPlot::replot();
 315 }
 316
 317 void
 318 FrequencyDisplayPlot::resizeSlot( QSize *s )
 319 {
 320   resize(s->width(), s->height());
 321 }
 322
 323 void
 324 FrequencyDisplayPlot::PlotNewData(const double* dataPoints, const int64_t numDataPoints,
 325                                   const double noiseFloorAmplitude, const double peakFrequency,
 326                                   const double peakAmplitude, const double timeInterval)
 327 {
 328   // Only update plot if there is data and if the time interval has elapsed
 329   if((numDataPoints > 0) &&
 330      (diff_timespec(get_highres_clock(), _lastReplot) > timeInterval)) {
 331
 332     if(numDataPoints != _numPoints) {
 333       _numPoints = numDataPoints;
 334
 335       delete[] _dataPoints;
 336       delete[] _minFFTPoints;
 337       delete[] _maxFFTPoints;
 338       delete[] _xAxisPoints;
 339       _dataPoints = new double[_numPoints];
 340       _xAxisPoints = new double[_numPoints];
 341       _minFFTPoints = new double[_numPoints];
 342       _maxFFTPoints = new double[_numPoints];
 343
 344       _fft_plot_curve->setRawData(_xAxisPoints, _dataPoints, _numPoints);
 345       _min_fft_plot_curve->setRawData(_xAxisPoints, _minFFTPoints, _numPoints);
 346       _max_fft_plot_curve->setRawData(_xAxisPoints, _maxFFTPoints, _numPoints);
 347
 348       _resetXAxisPoints();
 349       ClearMaxData();
 350       ClearMinData();
 351     }
 352
 353     memcpy(_dataPoints, dataPoints, numDataPoints*sizeof(double));
 354     for(int64_t point = 0; point < numDataPoints; point++){
 355       if(dataPoints[point] < _minFFTPoints[point]){
 356         _minFFTPoints[point] = dataPoints[point];
 357       }
 358       if(dataPoints[point] > _maxFFTPoints[point]){
 359         _maxFFTPoints[point] = dataPoints[point];
 360       }
 361     }
 362
 363     _noiseFloorAmplitude = noiseFloorAmplitude;
 364     _peakFrequency = peakFrequency;
 365     _peakAmplitude = peakAmplitude;
 366
 367     SetUpperIntensityLevel(_peakAmplitude);
 368
 369     replot();
 370
 371     _lastReplot = get_highres_clock();
 372   }
 373 }
 374
 375 void
 376 FrequencyDisplayPlot::ClearMaxData()
 377 {
 378   for(int64_t number = 0; number < _numPoints; number++){
 379     _maxFFTPoints[number] = _minYAxis;
 380   }
 381 }
 382
 383 void
 384 FrequencyDisplayPlot::ClearMinData()
 385 {
 386   for(int64_t number = 0; number < _numPoints; number++){
 387     _minFFTPoints[number] = _maxYAxis;
 388   }
 389 }
 390
 391 void
 392 FrequencyDisplayPlot::SetMaxFFTVisible(const bool visibleFlag)
 393 {
 394   _max_fft_plot_curve->setVisible(visibleFlag);
 395 }
 396
 397 void
 398 FrequencyDisplayPlot::SetMinFFTVisible(const bool visibleFlag)
 399 {
 400   _min_fft_plot_curve->setVisible(visibleFlag);
 401 }
 402
 403 void
 404 FrequencyDisplayPlot::_resetXAxisPoints()
 405 {
 406   double fft_bin_size = (_stopFrequency-_startFrequency) / static_cast<double>(_numPoints);
 407   double freqValue = _startFrequency;
 408   for(int64_t loc = 0; loc < _numPoints; loc++){
 409     _xAxisPoints[loc] = freqValue;
 410     freqValue += fft_bin_size;
 411   }
 412
 413   setAxisScale(QwtPlot::xBottom, _startFrequency, _stopFrequency);
 414
 415   // Set up zoomer base for maximum unzoom x-axis
 416   // and reset to maximum unzoom level
 417   QwtDoubleRect zbase = _zoomer->zoomBase();
 418   zbase.setLeft(_startFrequency);
 419   zbase.setRight(_stopFrequency);
 420   _zoomer->zoom(zbase);
 421   _zoomer->setZoomBase(zbase);
 422   _zoomer->zoom(0);
 423 }
 424
 425 void
 426 FrequencyDisplayPlot::SetLowerIntensityLevel(const double lowerIntensityLevel)
 427 {
 428   _lower_intensity_marker->setYValue( lowerIntensityLevel );
 429 }
 430
 431 void
 432 FrequencyDisplayPlot::SetUpperIntensityLevel(const double upperIntensityLevel)
 433 {
 434   _upper_intensity_marker->setYValue( upperIntensityLevel );
 435 }
 436
 437
 438 #endif /* FREQUENCY_DISPLAY_PLOT_C */