qwt spectrogramm plot with data arrays

The following is a class using the qwt libary to generate a spectrogramm and/or a contour plot. In contrast to the example shipped with qwt it uses a data array instead of a hard coded function. QSpectrogramPlot.h #ifndef QSPECTROGRAMPLOT_H_ #define QSPECTROGRAMPLOT_H_   #include "ExtFunctions.h"   #include <QtGui/QHBoxLayout> #include <QtGui/QWidget>   #include <qwt_plot.h>...