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// HamFax -- an application for sending and receiving amateur radio facsimiles
// Copyright (C) 2001 Christof Schmitt, DH1CS <cschmitt@users.sourceforge.net>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include "Spectrum.hpp"
#include <qpainter.h>
#include <qpixmap.h>
#include <math.h>
Spectrum::Spectrum(QWidget* parent)
: QFrame(parent)
{
setFrameStyle(QFrame::Panel|QFrame::Sunken);
setMargin(2);
setFixedSize(128+2*margin(),64+2*margin());
pixmap=new QPixmap(width()-2*margin(),height()-2*margin());
QPainter paint(pixmap,this);
paint.eraseRect(0,0,width(),height());
paint.flush();
}
void Spectrum::init(void)
{
for(int i=0; i<64; i++) {
data[i]=0;
}
}
void Spectrum::paintEvent(QPaintEvent* e)
{
QFrame::paintEvent(e);
bitBlt(this,margin(),margin(),pixmap,0,0,
width()-2*margin(),height()-2*margin());
}
void Spectrum::samples(int* buffer, int n)
{
for(int i=0; i<64; i++) {
data[i]=0;
}
for(int i=0; i<n; i++) {
data[buffer[i]/4]++;
}
for(int i=0; i<64; i++) {
data[i]=data[i]*128.0/n+1;
data[i]=log(data[i])*32.0;
if(data[i]>127) {
data[i]=127;
}
}
QPainter paint(pixmap,this);
paint.eraseRect(0,0,width(),height());
paint.setPen(Qt::blue);
paint.setBrush(Qt::blue);
for(int i=0; i<64; i++) {
paint.drawRect(i*2,128-data[i],2,data[i]);
}
paint.flush();
update();
}
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