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#include "widget/wvumeter.h"
#include "util/math.h"
WVuMeter::WVuMeter(QWidget* parent)
: WVuMeterBase(parent) {
}
void WVuMeter::draw() {
QPainter p(paintDevice());
// fill the background, in case the image contains transparency
p.fillRect(rect(), m_qBgColor);
if (!m_pPixmapBack.isNull()) {
// Draw background.
QRectF sourceRect(0, 0, m_pPixmapBack->width(), m_pPixmapBack->height());
m_pPixmapBack->draw(rect(), &p, sourceRect);
}
const double widgetWidth = width();
const double widgetHeight = height();
const double pixmapWidth = m_pPixmapVu.isNull() ? 0 : m_pPixmapVu->width();
const double pixmapHeight = m_pPixmapVu.isNull() ? 0 : m_pPixmapVu->height();
// Draw (part of) vu
if (m_bHorizontal) {
{
const double widgetPosition = math_clamp(widgetWidth * m_dParameter, 0.0, widgetWidth);
QRectF targetRect(0, 0, widgetPosition, widgetHeight);
if (!m_pPixmapVu.isNull()) {
const double pixmapPosition = math_clamp(
pixmapWidth * m_dParameter, 0.0, pixmapWidth);
QRectF sourceRect(0, 0, pixmapPosition, pixmapHeight);
m_pPixmapVu->draw(targetRect, &p, sourceRect);
} else {
// fallback to green rectangle
p.fillRect(targetRect, QColor(0, 255, 0));
}
}
if (m_iPeakHoldSize > 0 && m_dPeakParameter > 0.0 &&
m_dPeakParameter > m_dParameter) {
const double widgetPeakPosition = math_clamp(
widgetWidth * m_dPeakParameter, 0.0, widgetWidth);
const double pixmapPeakHoldSize = static_cast<double>(m_iPeakHoldSize);
const double widgetPeakHoldSize = widgetWidth * pixmapPeakHoldSize / pixmapWidth;
QRectF targetRect(widgetPeakPosition - widgetPeakHoldSize,
0,
widgetPeakHoldSize,
widgetHeight);
if (!m_pPixmapVu.isNull()) {
const double pixmapPeakPosition = math_clamp(
pixmapWidth * m_dPeakParameter, 0.0, pixmapWidth);
QRectF sourceRect =
QRectF(pixmapPeakPosition - pixmapPeakHoldSize,
0,
pixmapPeakHoldSize,
pixmapHeight);
m_pPixmapVu->draw(targetRect, &p, sourceRect);
} else {
// fallback to green rectangle
p.fillRect(targetRect, QColor(0, 255, 0));
}
}
} else {
// vertical
{
const double widgetPosition =
math_clamp(widgetHeight * m_dParameter, 0.0, widgetHeight);
QRectF targetRect(0, widgetHeight - widgetPosition, widgetWidth, widgetPosition);
if (!m_pPixmapVu.isNull()) {
const double pixmapPosition = math_clamp(
pixmapHeight * m_dParameter, 0.0, pixmapHeight);
QRectF sourceRect(0, pixmapHeight - pixmapPosition, pixmapWidth, pixmapPosition);
m_pPixmapVu->draw(targetRect, &p, sourceRect);
} else {
// fallback to green rectangle
p.fillRect(targetRect, QColor(0, 255, 0));
}
}
if (m_iPeakHoldSize > 0 && m_dPeakParameter > 0.0 &&
m_dPeakParameter > m_dParameter) {
const double widgetPeakPosition = math_clamp(
widgetHeight * m_dPeakParameter, 0.0, widgetHeight);
const double pixmapPeakHoldSize = static_cast<double>(m_iPeakHoldSize);
const double widgetPeakHoldSize = widgetHeight * pixmapPeakHoldSize / pixmapHeight;
QRectF targetRect(0,
widgetHeight - widgetPeakPosition,
widgetWidth,
widgetPeakHoldSize);
if (!m_pPixmapVu.isNull()) {
const double pixmapPeakPosition = math_clamp(
pixmapHeight * m_dPeakParameter, 0.0, pixmapHeight);
QRectF sourceRect = QRectF(0,
pixmapHeight - pixmapPeakPosition,
pixmapWidth,
pixmapPeakHoldSize);
m_pPixmapVu->draw(targetRect, &p, sourceRect);
} else {
// fallback to green rectangle
p.fillRect(targetRect, QColor(0, 255, 0));
}
}
}
}
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