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//=========================================================
// MusE
// Linux Music Editor
// $Id: meter.cpp,v 1.1.1.1 2003/10/29 10:05:24 wschweer Exp $
//
// (C) Copyright 2000 Werner Schweer (ws@seh.de)
//=========================================================
#include <stdio.h>
#include <cmath>
#include "meter.h"
#include <qpainter.h>
extern int minMeter;
//---------------------------------------------------------
// Meter
//---------------------------------------------------------
Meter::Meter(QWidget* parent)
: QFrame(parent, "", WRepaintNoErase)
{
overflow = false;
val = 0.0;
maxVal = 0.0;
minScale = minMeter; // min value in dB
maxScale = 10;
yellowScale = -10;
redScale = 0;
setLineWidth(1);
setMidLineWidth(0);
setFrameStyle(Box | Raised);
}
//---------------------------------------------------------
// setVal
//---------------------------------------------------------
void Meter::setVal(int v, int max, bool ovl)
{
overflow = ovl;
val = double(v)/32767.0;
maxVal = double(max)/32767.0;
update();
}
//---------------------------------------------------------
// resetPeaks
// reset peak and overflow indicator
//---------------------------------------------------------
void Meter::resetPeaks()
{
maxVal = val;
overflow = val > 0.0;
update();
}
//---------------------------------------------------------
// setRange
//---------------------------------------------------------
void Meter::setRange(double min, double max)
{
minScale = min;
maxScale = max;
update();
}
//---------------------------------------------------------
// paintEvent
//---------------------------------------------------------
void Meter::drawContents(QPainter* p)
{
double range = maxScale - minScale;
int fw = frameWidth();
int h = height() - 2* fw;
int yv = val == 0 ? h : int(((maxScale - (log10(val) * 20)) * h)/range);
bitBlt(this, fw, fw, &bgPm, 0, 0, -1, yv, CopyROP, true);
bitBlt(this, fw, fw+yv, &fgPm, 0, yv, -1, h-yv, CopyROP, true);
int ymax = maxVal == 0 ? 0 : int(((maxScale - (log10(maxVal) * 20)) * h)/range);
p->setPen(white);
p->drawLine(0, ymax, width()-2*fw, ymax);
}
//---------------------------------------------------------
// resizeEvent
//---------------------------------------------------------
void Meter::resizeEvent(QResizeEvent* ev)
{
int fw = frameWidth();
double range = maxScale - minScale;
int h = ev->size().height() - 2*fw;
int w = ev->size().width() - 2*fw;
bgPm.resize(w, h);
fgPm.resize(w, h);
int y1 = int((maxScale - redScale) * h / range);
int y2 = int((maxScale - yellowScale) * h / range);
int y3 = h;
QPainter p1(&fgPm);
QPainter p2(&bgPm);
p1.fillRect(0, 0, w, y1, QBrush(0xff0000)); // red
p1.fillRect(0, y1, w, y2-y1, QBrush(0xffff00)); // yellow
p1.fillRect(0, y2, w, y3-y2, QBrush(0x00ff00)); // green
p2.fillRect(0, 0, w, y1, QBrush(0x8e0000)); // red
p2.fillRect(0, y1, w, y2-y1, QBrush(0x8e8e00)); // yellow
p2.fillRect(0, y2, w, y3-y2, QBrush(0x007000)); // green
}
//---------------------------------------------------------
// mousePressEvent
//---------------------------------------------------------
void Meter::mousePressEvent(QMouseEvent*)
{
emit mousePress();
}
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