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// Simple bargraph meter
// Implemented by Edson Pereira PY2SDR
#include "meterwidget.h"
MeterWidget::MeterWidget(QWidget *parent) :
QWidget(parent),
m_signal(0)
{
for ( int i = 0; i < 10; i++ ) {
signalQueue.enqueue(0);
}
}
void MeterWidget::setValue(int value)
{
m_signal = value;
signalQueue.enqueue(value);
signalQueue.dequeue();
// Get signal peak
int tmp = 0;
for (int i = 0; i < signalQueue.size(); ++i) {
if (signalQueue.at(i) > tmp)
tmp = signalQueue.at(i);
}
m_sigPeak = tmp;
update();
}
void MeterWidget::paintEvent( QPaintEvent * )
{
int pos;
QPainter p {this};
// Sanitize
m_signal = m_signal < 0 ? 0 : m_signal;
m_signal = m_signal > 60 ? 60 : m_signal;
pos = m_signal * 2;
QRect r(0, height() - pos, width(), pos );
p.fillRect(r, QColor( 255, 150, 0 ));
// Draw peak hold indicator
p.setPen(Qt::black);
pos = m_sigPeak * 2;
p.drawLine(0, height() - pos, 10, height() - pos);
}
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