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//
// VUMeter class
//
// Copyright (c) 2001 Camilo Mesias
// camilo@mesias.co.uk
//
// 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 <stdio.h>
#include "vumeter.h"
#include <qpainter.h>
#include <math.h>
VUMeter::VUMeter(QWidget *parent, const char *name )
: QWidget( parent, name ), Lannot("A"), Rannot("440 Hz")
{
// setPalette( QPalette( QColor( 250, 250, 200) ) );
vuvalue = 0;
pix = 0;
}
VUMeter::~VUMeter()
{
delete(pix);
}
void VUMeter::paintEvent(QPaintEvent *){
vupdate();
}
void VUMeter::bupdate(){
if (!pix){
pix = new QPixmap(rect().size());
}
// redraw whole background to buffer
pix->fill(this, 0, 0);
QPainter p( pix );
p.setBrush(white);
p.setPen(NoPen);
p.drawRect( QRect(0, 0, width(), height()) );
p.translate(width()/2, 0);
p.setBrush(black);
p.setPen(black);
// for (int i=-50;i<50;i+=4){
// p.drawLine((vuvalue), height()-10, vuvalue*2, 25);
// }
p.drawText(-100,15,Lannot);
p.drawText(65,15,Rannot);
p.drawText(-100, height()-25, QString("-"));
p.drawText(85, height()-25, QString("+"));
p.drawText(-2, 20, QString("0"));
p.end();
}
void VUMeter::vupdate(){
if (!pix){
bupdate();
}
// redraw line only
QPixmap tmp_pix(rect().size());
QPainter p( &tmp_pix );
p.drawPixmap(QPoint(0,0), *pix);
p.translate(width()/2, 0);
p.drawLine((vuvalue), height()-10, vuvalue*2, 25);
p.end();
bitBlt(this, rect().topLeft(), &tmp_pix);
}
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