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#include <qprinter.h>
#if QT_VERSION >= 0x040000
#include <qprintdialog.h>
#endif
#include <qwt_color_map.h>
#include <qwt_plot_spectrogram.h>
#include <qwt_scale_widget.h>
#include <qwt_scale_draw.h>
#include <qwt_plot_zoomer.h>
#include <qwt_plot_panner.h>
#include <qwt_plot_layout.h>
#include "plot.h"
class MyZoomer: public QwtPlotZoomer
{
public:
MyZoomer(QwtPlotCanvas *canvas):
QwtPlotZoomer(canvas)
{
setTrackerMode(AlwaysOn);
}
virtual QwtText trackerText(const QwtDoublePoint &pos) const
{
QColor bg(Qt::white);
#if QT_VERSION >= 0x040300
bg.setAlpha(200);
#endif
QwtText text = QwtPlotZoomer::trackerText(pos);
text.setBackgroundBrush( QBrush( bg ));
return text;
}
};
class SpectrogramData: public QwtRasterData
{
public:
SpectrogramData():
QwtRasterData(QwtDoubleRect(-1.5, -1.5, 3.0, 3.0))
{
}
virtual QwtRasterData *copy() const
{
return new SpectrogramData();
}
virtual QwtDoubleInterval range() const
{
return QwtDoubleInterval(0.0, 10.0);
}
virtual double value(double x, double y) const
{
const double c = 0.842;
const double v1 = x * x + (y-c) * (y+c);
const double v2 = x * (y+c) + x * (y+c);
return 1.0 / (v1 * v1 + v2 * v2);
}
};
Plot::Plot(QWidget *parent):
QwtPlot(parent)
{
d_spectrogram = new QwtPlotSpectrogram();
QwtLinearColorMap colorMap(Qt::darkCyan, Qt::red);
colorMap.addColorStop(0.1, Qt::cyan);
colorMap.addColorStop(0.6, Qt::green);
colorMap.addColorStop(0.95, Qt::yellow);
d_spectrogram->setColorMap(colorMap);
d_spectrogram->setData(SpectrogramData());
d_spectrogram->attach(this);
QwtValueList contourLevels;
for ( double level = 0.5; level < 10.0; level += 1.0 )
contourLevels += level;
d_spectrogram->setContourLevels(contourLevels);
// A color bar on the right axis
QwtScaleWidget *rightAxis = axisWidget(QwtPlot::yRight);
rightAxis->setTitle("Intensity");
rightAxis->setColorBarEnabled(true);
rightAxis->setColorMap(d_spectrogram->data().range(),
d_spectrogram->colorMap());
setAxisScale(QwtPlot::yRight,
d_spectrogram->data().range().minValue(),
d_spectrogram->data().range().maxValue() );
enableAxis(QwtPlot::yRight);
plotLayout()->setAlignCanvasToScales(true);
replot();
// LeftButton for the zooming
// MidButton for the panning
// RightButton: zoom out by 1
// Ctrl+RighButton: zoom out to full size
QwtPlotZoomer* zoomer = new MyZoomer(canvas());
#if QT_VERSION < 0x040000
zoomer->setMousePattern(QwtEventPattern::MouseSelect2,
Qt::RightButton, Qt::ControlButton);
#else
zoomer->setMousePattern(QwtEventPattern::MouseSelect2,
Qt::RightButton, Qt::ControlModifier);
#endif
zoomer->setMousePattern(QwtEventPattern::MouseSelect3,
Qt::RightButton);
QwtPlotPanner *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::darkBlue);
zoomer->setRubberBandPen(c);
zoomer->setTrackerPen(c);
}
void Plot::showContour(bool on)
{
d_spectrogram->setDisplayMode(QwtPlotSpectrogram::ContourMode, on);
replot();
}
void Plot::showSpectrogram(bool on)
{
d_spectrogram->setDisplayMode(QwtPlotSpectrogram::ImageMode, on);
d_spectrogram->setDefaultContourPen(on ? QPen() : QPen(Qt::NoPen));
replot();
}
void Plot::printPlot()
{
QPrinter printer;
printer.setOrientation(QPrinter::Landscape);
#if QT_VERSION < 0x040000
printer.setColorMode(QPrinter::Color);
#if 0
printer.setOutputFileName("/tmp/spectrogram.ps");
#endif
if (printer.setup())
#else
#if 0
printer.setOutputFileName("/tmp/spectrogram.pdf");
#endif
QPrintDialog dialog(&printer);
if ( dialog.exec() )
#endif
{
print(printer);
}
}
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