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#include "DisplayLevel.hpp"
#include <qpainter.h>
DisplayLevel::DisplayLevel(QWidget* parent)
: QFrame(parent), w(0)
{
setMinimumHeight(20);
setFrameStyle(QFrame::Panel|QFrame::Sunken);
setMargin(2);
m=margin();
}
void DisplayLevel::paintEvent(QPaintEvent* e)
{
QFrame::paintEvent(e);
QPainter paint;
paint.begin(this);
paint.setPen(Qt::blue);
paint.setBrush(Qt::blue);
paint.drawRect(m,m,w,height()-2*m);
paint.end();
}
void DisplayLevel::setZero(void)
{
w=0;
}
void DisplayLevel::samples(short* buffer, int n)
{
short min=32767;
short max=-32768;
for(int i=0; i<n; i++) {
short s=buffer[i];
if(s>max) {
max=s;
}
if(s<min) {
min=s;
}
}
double level=(max-min)/65536.0;
w=static_cast<int>(level*(width()-2*m));
update();
}
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