add Map inverse geocoding

add minimum/maximum to ScrollSpinBox

libs/map/osm_geocoding.cpp

@@ -0,0 +1,92 @@
+#include "osm_geocoding.h"
+
+#include <QJsonObject>
+#include <QJsonValue>
+#include <QLocale>
+#include <QNetworkAccessManager>
+#include <QNetworkReply>
+#include <QNetworkRequest>
+
+
+OSMGeocodingResult::OSMGeocodingResult(QObject * parent): QObject(parent) {}
+
+
+OSMGeocodingResult::~OSMGeocodingResult() {}
+
+
+void OSMGeocodingResult::abort() {
+	if (reply) {
+		reply->abort();
+		reply->deleteLater();
+		blockSignals(true);
+		deleteLater();
+		reply = nullptr;
+	}
+}
+
+
+QString OSMGeocodingResult::displayName() const {
+	return res.object().value("display_name").toString();
+}
+
+
+QPointF OSMGeocodingResult::resultCoordinate() const {
+	auto loc_c = QLocale::c();
+	return QPointF(loc_c.toDouble(res.object().value("lat").toString()), loc_c.toDouble(res.object().value("lng").toString()));
+}
+
+
+void OSMGeocodingResult::requestDone() {
+	emit ready();
+	deleteLater();
+}
+
+
+// OSMGeocoding
+
+OSMGeocoding::OSMGeocoding(): QObject() {
+	nam      = new QNetworkAccessManager();
+	provider = "https://nominatim.openstreetmap.org";
+	// https://nominatim.openstreetmap.org/reverse?lat=52.79870&lon=27.56572&format=json
+}
+
+
+OSMGeocoding::~OSMGeocoding() {
+	delete nam;
+}
+
+
+OSMGeocoding * OSMGeocoding::instance() {
+	static OSMGeocoding ret;
+	return &ret;
+}
+
+
+OSMGeocodingResult * OSMGeocoding::queue(QPointF coord) {
+	return instance()->reverseCoding(coord);
+}
+
+
+OSMGeocodingResult * OSMGeocoding::reverseCoding(QPointF coord) {
+	auto loc_c = QLocale::c();
+	QNetworkRequest req(
+		provider +
+		QString("/reverse?lat=%1&lon=%2&format=json").arg(loc_c.toString(coord.x(), 'f', 8)).arg(loc_c.toString(coord.y(), 'f', 8)));
+	req.setHeader(QNetworkRequest::UserAgentHeader, "Qt/5");
+	req.setRawHeader("Accept-Language", (QLocale().name() + "," + QLocale().bcp47Name()).toLatin1());
+	auto * r = nam->get(req);
+	if (!r) return nullptr;
+	OSMGeocodingResult * ret = new OSMGeocodingResult(nam);
+	ret->reply               = r;
+	connect(r, &QNetworkReply::finished, this, [r, ret]() {
+		r->deleteLater();
+		if (r->error() != QNetworkReply::NoError) {
+			qDebug() << "Error:" << r->error();
+		} else {
+			QByteArray data = r->readAll();
+			if (!data.isEmpty()) ret->res = QJsonDocument::fromJson(data);
+		}
+		ret->requestDone();
+	});
+	return ret;
+}