WSJT-X/meterwidget.cpp
Joe Taylor 61f023ddd1 Most of these changes are thanks to G4WJS. Audio I/O is now done using
Qt's built-in QAudio calls rather than PortAudio.  Also includes some
refactoring of the arrangement for these calls, and more use of C++ style.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3523 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2013-08-05 13:57:55 +00:00

52 lines
1.1 KiB
C++

// 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;
p.begin(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);
}