void AudioScale::paintEvent(QPaintEvent*)
{
QPainter p(this);
const int h = IEC_Scale(-dbscale[0]) * height() - 2;
foreach (int i, dbscale) {
if (height() > width()) {
if (i != dbscale[0]) {
double xf = IEC_Scale(i) * h;
QString s = QString().sprintf("%d", i);
p.drawText(width() - fontMetrics().width(s), height() - xf - 1, s);
}
} else {
double xf = IEC_Scale(i) * (double) width();
p.drawText(xf * 40.0/42.0 - 10, height() - 2, QString().sprintf("%d", i));
}
}
p.end();
}
void AudioSignal::paintEvent(QPaintEvent* /*e*/)
{
if (!m_aMonitoringEnabled->isChecked() || !isVisible()) {
return;
}
QPainter p(this);
int numchan = channels.size();
bool horiz=width() > height();
int dbsize = fontMetrics().width("-60") + 2;
bool showdb=width()>(dbsize+2);
const int h = IEC_Scale(-dbscale.at(0)) * height() - 2;
//valpixel=1.0 for 127, 1.0+(1/40) for 1 short oversample, 1.0+(2/40) for longer oversample
for (int i = 0; i < numchan; i++) {
double valpixel=valueToPixel((double)(unsigned char)channels[i]/127.0);
int maxx= h * valpixel;
int xdelta= h / 42 ;
int _y2= (showdb?width()-dbsize:width () ) / numchan - 1 ;
int _y1= (showdb?width()-dbsize:width() ) *i/numchan;
int _x2= maxx > xdelta ? xdelta - 3 : maxx - 3 ;
if (horiz){
dbsize=9;
showdb=height()>(dbsize);
maxx=width()*valpixel;
xdelta = width() / 42;
_y2=( showdb?height()-dbsize:height() ) / numchan - 1 ;
_y1= (showdb?height()-dbsize:height() ) * i/numchan;
_x2= maxx > xdelta ? xdelta - 1 : maxx - 1;
}
for (int x = 0; x <= 42; x++) {
int _x1= x *xdelta;
QColor sig=Qt::green;
//value of actual painted digit
double ival=(double)_x1/(double)xdelta/42.0;
if (ival > 40.0/42.0){
sig=Qt::red;
}else if ( ival > 37.0/42.0){
sig=Qt::darkYellow;
}else if ( ival >30.0/42.0){
sig=Qt::yellow;
}
if (maxx > 0) {
if (horiz){
p.fillRect(_x1, _y1, _x2, _y2, QBrush(sig, Qt::SolidPattern) );
}else{
p.fillRect(_y1+dbsize, height()-_x1, _y2,-_x2, QBrush(sig, Qt::SolidPattern) );
}
maxx -= xdelta;
}
}
int xp=valueToPixel((double)peeks.at(i)/127.0)*(horiz?width():h)-2;
p.fillRect(horiz?xp:_y1+dbsize, horiz?_y1:height()-xdelta-xp, horiz?3:_y2, horiz?_y2:3, QBrush(Qt::black,Qt::SolidPattern));
}
if (showdb){
//draw db value at related pixel
for (int l=0;l<dbscale.size();l++){
if (!horiz){
double xf = IEC_Scale(dbscale.at(l)) * h;
p.drawText(0, height() - xf + 2, QString().sprintf("%s%d",dbscale.at(l)>=0?" ":"",dbscale.at(l)));
}else{
double xf = IEC_Scale(dbscale.at(l)) * (double) width();
p.drawText(xf*40/42-10,height()-2, QString().sprintf("%d",dbscale.at(l)));
}
}
}
p.end();
}
double AudioSignal::valueToPixel(double in)
{
return IEC_Scale(log10(in) * 20.0);
}
