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   setAxisScaleDraw(QwtPlot::xBottom, new FreqDisplayScaleDraw(0));
 124   setAxisScale(QwtPlot::xBottom, _startFrequency, _stopFrequency);
 125   setAxisTitle(QwtPlot::xBottom, "Frequency (Hz)");
 126
 127   _minYAxis = -120;
 128   _maxYAxis = 10;
 129   setAxisScaleEngine(QwtPlot::yLeft, new QwtLinearScaleEngine);
 130   setAxisScale(QwtPlot::yLeft, _minYAxis, _maxYAxis);
 131   setAxisTitle(QwtPlot::yLeft, "Power (dB)");
 132
 133   // Automatically deleted when parent is deleted
 134   _fft_plot_curve = new QwtPlotCurve("Power Spectrum");
 135   _fft_plot_curve->attach(this);
 136   _fft_plot_curve->setPen(QPen(Qt::blue));
 137   _fft_plot_curve->setRawData(_xAxisPoints, _dataPoints, _numPoints);
 138
 139   _min_fft_plot_curve = new QwtPlotCurve("Minimum Power");
 140   _min_fft_plot_curve->attach(this);
 141   _min_fft_plot_curve->setPen(QPen(Qt::magenta));
 142   _min_fft_plot_curve->setRawData(_xAxisPoints, _minFFTPoints, _numPoints);
 143   _min_fft_plot_curve->setVisible(false);
 144
 145   _max_fft_plot_curve = new QwtPlotCurve("Maximum Power");
 146   _max_fft_plot_curve->attach(this);
 147   _max_fft_plot_curve->setPen(QPen(Qt::darkYellow));
 148   _max_fft_plot_curve->setRawData(_xAxisPoints, _maxFFTPoints, _numPoints);
 149   _max_fft_plot_curve->setVisible(false);
 150
 151   _lower_intensity_marker = new QwtPlotMarker();
 152   _lower_intensity_marker->setLineStyle(QwtPlotMarker::HLine);
 153   _lower_intensity_marker->setLinePen(QPen(Qt::cyan));
 154   _lower_intensity_marker->attach(this);
 155
 156   _upper_intensity_marker = new QwtPlotMarker();
 157   _upper_intensity_marker->setLineStyle(QwtPlotMarker::HLine);
 158   _upper_intensity_marker->setLinePen(QPen(Qt::green, 0, Qt::DotLine));
 159   _upper_intensity_marker->attach(this);
 160
 161   memset(_dataPoints, 0x0, _numPoints*sizeof(double));
 162   memset(_xAxisPoints, 0x0, _numPoints*sizeof(double));
 163
 164   for(int64_t number = 0; number < _numPoints; number++){
 165     _minFFTPoints[number] = 200.0;
 166     _maxFFTPoints[number] = -280.0;
 167   }
 168
 169   _resetXAxisPoints();
 170
 171
 172   // set up peak marker
 173   QwtSymbol symbol;
 174
 175   _markerPeakAmplitude = new QwtPlotMarker();
 176   _markerPeakAmplitude->setLinePen(QPen(Qt::yellow));
 177   symbol.setStyle(QwtSymbol::Diamond);
 178   symbol.setSize(8);
 179   symbol.setPen(QPen(Qt::yellow));
 180   symbol.setBrush(QBrush(Qt::yellow));
 181   _markerPeakAmplitude->setSymbol(symbol);
 182   _markerPeakAmplitude->attach(this);
 183
 184   _markerNoiseFloorAmplitude = new QwtPlotMarker();
 185   _markerNoiseFloorAmplitude->setLineStyle(QwtPlotMarker::HLine);
 186   _markerNoiseFloorAmplitude->setLinePen(QPen(Qt::darkRed, 0, Qt::DotLine));
 187   _markerNoiseFloorAmplitude->attach(this);
 188
 189   _peakFrequency = 0;
 190   _peakAmplitude = -HUGE_VAL;
 191
 192   _noiseFloorAmplitude = -HUGE_VAL;
 193
 194   replot();
 195
 196   _zoomer = new FreqDisplayZoomer(canvas(), 0);
 197 #if QT_VERSION < 0x040000
 198   _zoomer->setMousePattern(QwtEventPattern::MouseSelect2,
 199                           Qt::RightButton, Qt::ControlModifier);
 200 #else
 201   _zoomer->setMousePattern(QwtEventPattern::MouseSelect2,
 202                           Qt::RightButton, Qt::ControlModifier);
 203 #endif
 204   _zoomer->setMousePattern(QwtEventPattern::MouseSelect3,
 205                           Qt::RightButton);
 206
 207   _panner = new QwtPlotPanner(canvas());
 208   _panner->setAxisEnabled(QwtPlot::yRight, false);
 209   _panner->setMouseButton(Qt::MidButton);
 210
 211   // Avoid jumping when labels with more/less digits
 212   // appear/disappear when scrolling vertically
 213
 214   const QFontMetrics fm(axisWidget(QwtPlot::yLeft)->font());
 215   QwtScaleDraw *sd = axisScaleDraw(QwtPlot::yLeft);
 216   sd->setMinimumExtent( fm.width("100.00") );
 217
 218   const QColor c(Qt::darkRed);
 219   _zoomer->setRubberBandPen(c);
 220   _zoomer->setTrackerPen(c);
 221 }
 222
 223 FrequencyDisplayPlot::~FrequencyDisplayPlot()
 224 {
 225   delete[] _dataPoints;
 226   delete[] _maxFFTPoints;
 227   delete[] _minFFTPoints;
 228   delete[] _xAxisPoints;
 229
 230   // _fft_plot_curves deleted when parent deleted
 231   // _zoomer and _panner deleted when parent deleted
 232 }
 233
 234 void
 235 FrequencyDisplayPlot::set_yaxis(double min, double max)
 236 {
 237   // Get the new max/min values for the plot
 238   _minYAxis = min;
 239   _maxYAxis = max;
 240
 241   // Set the axis max/min to the new values
 242   setAxisScale(QwtPlot::yLeft, _minYAxis, _maxYAxis);
 243
 244   // Reset the base zoom level to the new axis scale set here
 245   _zoomer->setZoomBase();
 246 }
 247
 248 void
 249 FrequencyDisplayPlot::SetFrequencyRange(const double constStartFreq,
 250                                         const double constStopFreq,
 251                                         const double constCenterFreq,
 252                                         const bool useCenterFrequencyFlag,
 253                                         const double units, const std::string &strunits)
 254 {
 255   double startFreq = constStartFreq / units;
 256   double stopFreq = constStopFreq / units;
 257   double centerFreq = constCenterFreq / units;
 258
 259   _useCenterFrequencyFlag = useCenterFrequencyFlag;
 260
 261   if(_useCenterFrequencyFlag){
 262     startFreq = (startFreq + centerFreq);
 263     stopFreq = (stopFreq + centerFreq);
 264   }
 265
 266   _startFrequency = startFreq;
 267   _stopFrequency = stopFreq;
 268   _resetXAxisPoints();
 269
 270   double display_units = ceil(log10(units)/2.0);
 271   setAxisScale(QwtPlot::xBottom, _startFrequency, _stopFrequency);
 272   setAxisScaleDraw(QwtPlot::xBottom, new FreqDisplayScaleDraw(display_units));
 273   setAxisTitle(QwtPlot::xBottom, QString("Frequency (%1)").arg(strunits.c_str()));
 274   ((FreqDisplayZoomer*)_zoomer)->SetFrequencyPrecision(display_units);
 275   ((FreqDisplayZoomer*)_zoomer)->SetUnitType(strunits);
 276
 277   // Load up the new base zoom settings
 278   _zoomer->setZoomBase();
 279
 280   // Zooms back to the base and clears any other zoom levels
 281   _zoomer->zoom(0);
 282 }
 283
 284
 285 double
 286 FrequencyDisplayPlot::GetStartFrequency() const
 287 {
 288   return _startFrequency;
 289 }
 290
 291 double
 292 FrequencyDisplayPlot::GetStopFrequency() const
 293 {
 294   return _stopFrequency;
 295 }
 296
 297 void
 298 FrequencyDisplayPlot::replot()
 299 {
 300   _markerNoiseFloorAmplitude->setYValue(_noiseFloorAmplitude);
 301
 302   // Make sure to take into account the start frequency
 303   if(_useCenterFrequencyFlag){
 304     _markerPeakAmplitude->setXValue((_peakFrequency/1000.0) + _startFrequency);
 305   }
 306   else{
 307     _markerPeakAmplitude->setXValue(_peakFrequency + _startFrequency);
 308   }
 309   _markerPeakAmplitude->setYValue(_peakAmplitude);
 310
 311   QwtPlot::replot();
 312 }
 313
 314 void
 315 FrequencyDisplayPlot::resizeSlot( QSize *s )
 316 {
 317   resize(s->width(), s->height());
 318 }
 319
 320 void
 321 FrequencyDisplayPlot::PlotNewData(const double* dataPoints, const int64_t numDataPoints,
 322                                   const double noiseFloorAmplitude, const double peakFrequency,
 323                                   const double peakAmplitude, const double timeInterval)
 324 {
 325   // Only update plot if there is data and if the time interval has elapsed
 326   if((numDataPoints > 0) &&
 327      (diff_timespec(get_highres_clock(), _lastReplot) > timeInterval)) {
 328
 329     if(numDataPoints != _numPoints) {
 330       _numPoints = numDataPoints;
 331
 332       delete[] _dataPoints;
 333       delete[] _minFFTPoints;
 334       delete[] _maxFFTPoints;
 335       delete[] _xAxisPoints;
 336       _dataPoints = new double[_numPoints];
 337       _xAxisPoints = new double[_numPoints];
 338       _minFFTPoints = new double[_numPoints];
 339       _maxFFTPoints = new double[_numPoints];
 340
 341       _fft_plot_curve->setRawData(_xAxisPoints, _dataPoints, _numPoints);
 342       _min_fft_plot_curve->setRawData(_xAxisPoints, _minFFTPoints, _numPoints);
 343       _max_fft_plot_curve->setRawData(_xAxisPoints, _maxFFTPoints, _numPoints);
 344
 345       _resetXAxisPoints();
 346       ClearMaxData();
 347       ClearMinData();
 348     }
 349
 350     memcpy(_dataPoints, dataPoints, numDataPoints*sizeof(double));
 351     for(int64_t point = 0; point < numDataPoints; point++){
 352       if(dataPoints[point] < _minFFTPoints[point]){
 353         _minFFTPoints[point] = dataPoints[point];
 354       }
 355       if(dataPoints[point] > _maxFFTPoints[point]){
 356         _maxFFTPoints[point] = dataPoints[point];
 357       }
 358     }
 359
 360     _noiseFloorAmplitude = noiseFloorAmplitude;
 361     _peakFrequency = peakFrequency;
 362     _peakAmplitude = peakAmplitude;
 363
 364     SetUpperIntensityLevel(_peakAmplitude);
 365
 366     replot();
 367
 368     _lastReplot = get_highres_clock();
 369   }
 370 }
 371
 372 void
 373 FrequencyDisplayPlot::ClearMaxData()
 374 {
 375   for(int64_t number = 0; number < _numPoints; number++){
 376     _maxFFTPoints[number] = _minYAxis;
 377   }
 378 }
 379
 380 void
 381 FrequencyDisplayPlot::ClearMinData()
 382 {
 383   for(int64_t number = 0; number < _numPoints; number++){
 384     _minFFTPoints[number] = _maxYAxis;
 385   }
 386 }
 387
 388 void
 389 FrequencyDisplayPlot::SetMaxFFTVisible(const bool visibleFlag)
 390 {
 391   _max_fft_plot_curve->setVisible(visibleFlag);
 392 }
 393
 394 void
 395 FrequencyDisplayPlot::SetMinFFTVisible(const bool visibleFlag)
 396 {
 397   _min_fft_plot_curve->setVisible(visibleFlag);
 398 }
 399
 400 void
 401 FrequencyDisplayPlot::_resetXAxisPoints()
 402 {
 403   double fft_bin_size = (_stopFrequency-_startFrequency) / static_cast<double>(_numPoints);
 404   double freqValue = _startFrequency;
 405   for(int64_t loc = 0; loc < _numPoints; loc++){
 406     _xAxisPoints[loc] = freqValue;
 407     freqValue += fft_bin_size;
 408   }
 409 }
 410
 411 void
 412 FrequencyDisplayPlot::SetLowerIntensityLevel(const double lowerIntensityLevel)
 413 {
 414   _lower_intensity_marker->setYValue( lowerIntensityLevel );
 415 }
 416
 417 void
 418 FrequencyDisplayPlot::SetUpperIntensityLevel(const double upperIntensityLevel)
 419 {
 420   _upper_intensity_marker->setYValue( upperIntensityLevel );
 421 }
 422
 423
 424 #endif /* FREQUENCY_DISPLAY_PLOT_C */