QGCImageProvider.cc

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#include "QGCImageProvider.h"
 
#include <QtGui/QPainter>
#include <QtGui/QFont>
 
QGCImageProvider::QGCImageProvider(QQmlImageProviderBase::ImageType imageType)
    : QQuickImageProvider(imageType)
    , _dummy(320, 240, QImage::Format_RGBA8888)
{
    // qCDebug(ImageProtocolManagerLog) << Q_FUNC_INFO << this;
 
    Q_ASSERT(imageType == QQmlImageProviderBase::ImageType::Image);
 
    // Dummy temporary image until something comes along
    _dummy.fill(Qt::black);
    QPainter painter(&_dummy);
    QFont f = painter.font();
    f.setPixelSize(20);
    painter.setFont(f);
    painter.setPen(Qt::white);
    painter.drawText(QRectF(0, 0, _dummy.width(), _dummy.height()), Qt::AlignCenter, QStringLiteral("Waiting..."));
    _images[0] = _dummy;
}
 
QGCImageProvider::~QGCImageProvider()
{
    // qCDebug(ImageProtocolManagerLog) << Q_FUNC_INFO << this;
}
 
QImage QGCImageProvider::requestImage(const QString &id, QSize *size, const QSize &requestedSize)
{
    Q_UNUSED(requestedSize);
 
    if (id.isEmpty()) {
        return _dummy;
    }
 
    if (!id.contains("/")) {
        return _dummy;
    }
 
    const QStringList url = id.split('/', Qt::SkipEmptyParts);
    if (url.size() != 2) {
        return _dummy;
    }
 
    bool ok = false;
    const uint8_t vehicleId = url[0].toUInt(&ok);
    if (!ok) {
        return _dummy;
    }
 
    const uint8_t index [[maybe_unused]] = url[1].toUInt(&ok);
    if (!ok) {
        return _dummy;
    }
 
    if (!_images.contains(vehicleId)) {
        return _dummy;
    }
 
    const QImage image = _images[vehicleId];
    // image->scaled(requestedSize);
    *size = image.size();
 
    return image;
}