appstream/meterwidget.cpp at master · napcode/appstream · GitHub

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#include "meterwidget.h"

#include <QPainter>

#include <QPaintEvent>

#include <QAction>

#include <QMenu>

#include <iostream>

#include <cmath>

MeterWidget::MeterWidget(QWidget* parent, uint8_t channels)

: QLabel(parent),

_isActive(true)

{

_colorspan = 120.0f / 360.0f;

setNumChannels(channels);

QAction* act_p = new QAction("Toggle Metering", this);

act_p->setCheckable(true);

connect(act_p, SIGNAL(toggled(bool)), this, SLOT(toggleActive(bool)));

this->addAction(act_p);

}

MeterWidget::~MeterWidget()

{

}

void MeterWidget::setNumChannels(uint8_t channels)

{

_numChannels = channels;

_v.resize(channels);

_width = width() / channels;

reset();

}

void MeterWidget::reset()

{

for (uint8_t i = 0; i < _v.size(); ++i) {

_v[i] = 0;

}

update();

}

void MeterWidget::paintEvent(QPaintEvent* event)

{

QPainter painter(this);

QRect r = event->rect();

QColor color;

color.setRgb(0, 0, 0);

int w = r.width() / _v.size();

int h = r.height();

// draw outer frame

QBrush b(color);

QRect border(0, 0, r.width() - 1, r.height() - 1);

painter.setBrush(b);

painter.drawRect(border);

if (!_isActive)

return;

QRect rect;

for (uint8_t i = 0; i < _v.size(); ++i) {

rect.setRect(i * w, h - h * _v[i], w - 1, h * _v[i]);

float col = _colorspan - (_colorspan * _v[i]);

color.setHsvF(col, 1.0f, 1.0f);

QBrush b(color);

painter.setBrush(b);

painter.drawRect(rect);

}

void MeterWidget::setValues(MeterValues m)

{

if (_isActive) {

_v = m;

update();

}

appstream/meterwidget.cpp at master · napcode/appstream · GitHub

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