main.cpp

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
#include <QVariantList>
#include <QImageReader>
#include <QColor>
#include <QDir>
#include <QUrl>

QString getFileUrlRelativeToExecutable(const QString &relativeFilePath) {
    // Get the directory path of the executable
    QString basePath = QCoreApplication::applicationDirPath();
    // Combine the base path with the relative file path
    QDir dir(basePath);
    QString fullPath = dir.filePath(relativeFilePath);  // Ensures the path is correctly formed
    // Convert the file path to a URL
    QUrl fileUrl = QUrl::fromLocalFile(fullPath);
    return fileUrl.toString();
}


int main(int argc, char *argv[])
{
    QGuiApplication gui_app(argc, argv);

    // Check if TIFF format is supported
    QStringList supportedFormats;
    for (const QByteArray &format : QImageReader::supportedImageFormats()) {
        supportedFormats.append(QString::fromLatin1(format));
    }
    if (!supportedFormats.contains("tiff", Qt::CaseInsensitive)) {
        qWarning() << "TIFF format is not supported!";
        return -1;
    }

    QQmlApplicationEngine engine;

    QString mapImagePath = getFileUrlRelativeToExecutable("../../data/regions/jena-small/landcover.tif");
    engine.rootContext()->setContextProperty("mapImagePath", mapImagePath);

    QVariantList colors;
    colors.append(QVariant::fromValue(QColor(255, 0, 0)));   // Red
    colors.append(QVariant::fromValue(QColor(0, 255, 0)));   // Green
    colors.append(QVariant::fromValue(QColor(0, 0, 255)));   // Blue
    engine.rootContext()->setContextProperty("colorList", colors);

    const QUrl qml_url(u"qrc:/main.qml"_qs);
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated, &gui_app,
                     [qml_url](QObject *obj, const QUrl &obj_url) {
                         if (!obj && qml_url == obj_url)
                             QCoreApplication::exit(-1);
                     },
                     Qt::QueuedConnection);
    engine.load(qml_url);
    return gui_app.exec();
}