arrays-prmap/country.cpp

#include "country.h"
#include <QFile>
#include <QDebug>
#include <QJsonArray>
#include <QJsonObject>
#include <QJsonDocument>

void Country::limits(){
    QMap<QString,City*>::iterator it = Cities.begin();

    minX = maxX = Cities.begin().value()->geometry->at(0).x();
    minY = maxY = Cities.begin().value()->geometry->at(0).y();

    for (it = Cities.begin() + 1; it != Cities.end(); ++it) {

        City *c = it.value();

        for (int i = 0; i < c->getSize(); i++) {
            if (c->geometry->at(i).x() != 0.0) {
            if (c->geometry->at(i).x() > maxX ) maxX = c->geometry->at(i).x();
            if (c->geometry->at(i).y() > maxY ) maxY = c->geometry->at(i).y();
            if (c->geometry->at(i).x() < minX ) minX = c->geometry->at(i).x();
            if (c->geometry->at(i).y() < minY ) minY = c->geometry->at(i).y();
            }
        }
    }
    qDebug() << minX << minY << maxX << maxY ;
}


unsigned long  *colorMap;
bool Country::readInfoFromJSON(const QString &fileName) {
    QFile loadFile(fileName);

    if (!loadFile.open(QIODevice::ReadOnly)) {
        qWarning("Couldn't open save file.");
        return false;
    }

    QByteArray saveData = loadFile.readAll();
    QJsonDocument loadDoc(QJsonDocument::fromJson(saveData));
    QJsonArray topLevelArray = loadDoc.array();

    int ctr = 1;
    foreach(QJsonValue obj, topLevelArray) {
        QVector<QPointF> *points = new QVector<QPointF>;
        QJsonArray geometryArray = obj.toObject()["geometry"].toObject()["coordinates"].toArray();
        QString polyType = obj.toObject()["geometry"].toObject()["type"].toString();
        if (polyType == "Polygon") {
            for (int i = 0; i < geometryArray[0].toArray().size(); i++) {
                points->push_back(QPointF(
                                geometryArray[0].toArray()[i].toArray()[0].toDouble(),
                                geometryArray[0].toArray()[i].toArray()[1].toDouble()));
            }
        }
        else {
            // for every city
            for (int i = 0; i <geometryArray.size() ; i++) {
                // for every point in the city's polygon
                for (int j = 0; j < geometryArray[i].toArray()[0].toArray().size(); j++) {
                    points->push_back(QPointF(
                                          geometryArray[i].toArray()[0].toArray()[j].toArray()[0].toDouble(),
                                          geometryArray[i].toArray()[0].toArray()[j].toArray()[1].toDouble()));

                }
                // I will push a 0,0 between each polygon of a multipolygon to distinguish
                points->push_back(QPointF(0,0));
            }
        }

        QString cityName = obj.toObject()["properties"].toObject()["city"].toString();

        qDebug() << "Storing: " << cityName;
        Cities[cityName] = new City;
        Cities[cityName]->geometry = points;

        ctr++;
    }
    return true;
}