version 2.13.0

add Map library (MapView with OSM maps and items) and mapviewer util

libs/map/osm_downloader.cpp

@@ -0,0 +1,73 @@
+#include "mapview.h"
+#include "osm_downloader_p.h"
+#include "osm_tile_cache_p.h"
+
+
+OSMDownloader::OSMDownloader(MapView * p): QThread() {
+	qRegisterMetaType<OSM::TileIndex>();
+	nam      = new QNetworkAccessManager();
+	parent   = p;
+	provider = "http://tile.openstreetmap.org";
+	start();
+}
+
+
+OSMDownloader::~OSMDownloader() {
+	requestInterruption();
+	cond.wakeAll();
+	wait();
+	delete nam;
+}
+
+
+void OSMDownloader::queueTile(OSM::TileIndex index) {
+	// auto hash = tile.hash();
+	cond_mutex.lock();
+	if (!queue.contains(index) && !in_progress.contains(index.hash())) {
+		queue.enqueue(index);
+		cond.wakeOne();
+	}
+	cond_mutex.unlock();
+}
+
+
+void OSMDownloader::requestTile(OSM::TileIndex index) {
+	QNetworkRequest req(provider + QString("/%1/%2/%3.png").arg(index.z).arg(index.x).arg(index.y));
+	req.setHeader(QNetworkRequest::UserAgentHeader, "Qt/5");
+	auto * r = nam->get(req);
+	if (!r) return;
+	connect(r, &QNetworkReply::finished, this, [this, r, index]() {
+		r->deleteLater();
+		if (r->error() != QNetworkReply::NoError) {
+			qDebug() << "Error:" << r->error();
+		} else {
+			QByteArray data = r->readAll();
+			if (!data.isEmpty()) {
+				QPixmap tim;
+				tim.loadFromData(data, "png");
+				if (!tim.isNull()) parent->cache->tileDownloaded(index, tim);
+			}
+		}
+		cond_mutex.lock();
+		in_progress.remove(index.hash());
+		cond_mutex.unlock();
+	});
+}
+
+
+void OSMDownloader::run() {
+	while (!isInterruptionRequested()) {
+		cond_mutex.lock();
+		if (queue.isEmpty())
+			cond.wait(&cond_mutex);
+		else {
+			auto t = queue.dequeue();
+			in_progress.insert(t.hash());
+			QMetaObject::invokeMethod(
+				parent,
+				[this, t]() { requestTile(t); },
+				Qt::QueuedConnection);
+		}
+		cond_mutex.unlock();
+	}
+}