The upper half of the area is for IC-7410, and the lower for Soft66LC4. The VFO frequencies are displayed, nameley, 7026.000kHz for IC-7410 amd 7020.000kHz for Soft66LC4.
When we click on the waterfall in the Soft66LC4 area, we want to change the VFO freqeuncy of IC-7410. So we need to get and set variables that do not belong to a class instance from which we want to manipulate. One method could be:
bool MyDrawingArea::on_draw(const Cairo::RefPtr<Cairo::Context> &cr) {
s->asound_read();
s->asound_fftcopy();
fftw_execute(s->plan);
int freq1 = s->get_frequency();
int freq2 = s->get_other_frequency();
char string[128];
sprintf(string, "%9.3fkHz %9.3fkHz", (double)freq1 / 1000.0, (double)freq2 / 1000.0);
}
class Sound : public AlsaParams {
public:
virtual int get_frequency () = 0;
virtual int get_other_frequency() = 0;
int get_ic7410_frequency() const { return ic7410_frequency; }
int get_soft66_frequency() const { return soft66_frequency; }
}
class SoundIC7410: public Sound {
public:
int get_frequency () override;
int get_other_frequency () override { return get_soft66_frequency(); }
}
class SoundSoft66: public Sound {
public:
SoundSoft66(char* s, char* t);
int get_frequency () override;
int get_other_frequency () override { return get_ic7410_frequency(); }
}
struct AlsaParams {
static int ic7410_frequency;
static int soft66_frequency;
}
Redundant? Which style do you prefer?
// int get_other_frequency () override { return get_soft66_frequency(); }
int get_other_frequency () override { return soft66_frequency; }
