}
protected:
- virtual QwtText trackerText( const QwtDoublePoint& p ) const
+ using QwtPlotZoomer::trackerText;
+ virtual QwtText trackerText( const QwtDoublePoint& p ) const
{
QwtText t(QString("%1 %2, %3 dB").
arg(p.x(), 0, 'f', GetFrequencyPrecision()).
palette.setColor(canvas()->backgroundRole(), QColor("white"));
canvas()->setPalette(palette);
- setAxisScaleDraw(QwtPlot::xBottom, new FreqDisplayScaleDraw(0));
- setAxisScale(QwtPlot::xBottom, _startFrequency, _stopFrequency);
setAxisTitle(QwtPlot::xBottom, "Frequency (Hz)");
+ setAxisScaleDraw(QwtPlot::xBottom, new FreqDisplayScaleDraw(0));
_minYAxis = -120;
_maxYAxis = 10;
_maxFFTPoints[number] = -280.0;
}
- _resetXAxisPoints();
-
-
// set up peak marker
QwtSymbol symbol;
const QColor c(Qt::darkRed);
_zoomer->setRubberBandPen(c);
_zoomer->setTrackerPen(c);
+
+ // Do this after the zoomer has been built
+ _resetXAxisPoints();
}
FrequencyDisplayPlot::~FrequencyDisplayPlot()
stopFreq = (stopFreq + centerFreq);
}
- _startFrequency = startFreq;
- _stopFrequency = stopFreq;
- _resetXAxisPoints();
+ bool reset = false;
+ if((startFreq != _startFrequency) || (stopFreq != _stopFrequency))
+ reset = true;
- double display_units = ceil(log10(units)/2.0);
- setAxisScale(QwtPlot::xBottom, _startFrequency, _stopFrequency);
- setAxisScaleDraw(QwtPlot::xBottom, new FreqDisplayScaleDraw(display_units));
- setAxisTitle(QwtPlot::xBottom, QString("Frequency (%1)").arg(strunits.c_str()));
- ((FreqDisplayZoomer*)_zoomer)->SetFrequencyPrecision(display_units);
- ((FreqDisplayZoomer*)_zoomer)->SetUnitType(strunits);
+ if(stopFreq > startFreq) {
+ _startFrequency = startFreq;
+ _stopFrequency = stopFreq;
+
+ if((axisScaleDraw(QwtPlot::xBottom) != NULL) && (_zoomer != NULL)){
+ double display_units = ceil(log10(units)/2.0);
+ setAxisScaleDraw(QwtPlot::xBottom, new FreqDisplayScaleDraw(display_units));
+ setAxisTitle(QwtPlot::xBottom, QString("Frequency (%1)").arg(strunits.c_str()));
- // Load up the new base zoom settings
- _zoomer->setZoomBase();
-
- // Zooms back to the base and clears any other zoom levels
- _zoomer->zoom(0);
+ if(reset)
+ _resetXAxisPoints();
+
+ ((FreqDisplayZoomer*)_zoomer)->SetFrequencyPrecision(display_units);
+ ((FreqDisplayZoomer*)_zoomer)->SetUnitType(strunits);
+ }
+ }
}
_xAxisPoints[loc] = freqValue;
freqValue += fft_bin_size;
}
+
+ setAxisScale(QwtPlot::xBottom, _startFrequency, _stopFrequency);
+
+ // Set up zoomer base for maximum unzoom x-axis
+ // and reset to maximum unzoom level
+ QwtDoubleRect zbase = _zoomer->zoomBase();
+ zbase.setLeft(_startFrequency);
+ zbase.setRight(_stopFrequency);
+ _zoomer->zoom(zbase);
+ _zoomer->setZoomBase(zbase);
+ _zoomer->zoom(0);
}
void