QAD::Map:

* add MapViewTileProviderBase - base class for tile server provider
 * migrate OSM to new class
 * add MapTiler provider
 * add offlineMode for MapView

libs/map/mapview_tile_cache_p.h

@@ -0,0 +1,90 @@
+/*
+    QAD - Qt ADvanced
+
+    Ivan Pelipenko peri4ko@yandex.ru
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef mapview_tile_cache_h
+#define mapview_tile_cache_h
+
+#include "osm_types_p.h"
+
+#include <QCache>
+#include <QDir>
+#include <QMutex>
+#include <QQueue>
+#include <QThread>
+#include <QWaitCondition>
+
+class MapView;
+
+class MapViewTileCache: public QThread {
+	Q_OBJECT
+
+public:
+	explicit MapViewTileCache(MapView * p);
+	~MapViewTileCache();
+
+	void setMinimumCacheSize(int bytes) {
+		fixed_size_b = bytes;
+		updateCacheSize();
+	}
+	void setAdditionalCacheSize(int mb) {
+		add_size_b = mb * 1024 * 1024;
+		updateCacheSize();
+	}
+	void setTileObsoleteTime(int secs) { secs_obsolete = secs; }
+
+	void tileDownloaded(OSM::TileIndex index, const QPixmap & pixmap);
+	OSM::TilePixmap getTile(OSM::TileIndex index, QRectF & rect_src);
+	void clearCache();
+
+	bool isTileFileExists(OSM::TileIndex index) const;
+
+	QString cacheRoot() const { return cache_root; }
+	void setCacheRoot(const QString & p);
+
+	void tileProviderChanged();
+	void setOfflineMode(bool yes);
+
+private:
+	OSM::TilePixmap getTileFromCache(OSM::TileIndex index);
+	void updateCacheSize();
+	void saveTile(OSM::TilePixmap * tile);
+	void writeToDisk(const OSM::TilePixmap & tile);
+	void run() override;
+
+	MapView * parent;
+	QString cache_root;
+	QDir cache_dir;
+	QWaitCondition cond;
+	QMutex cond_mutex;
+	int secs_obsolete = -1;
+	int fixed_size_b = 0, add_size_b = 0;
+	bool is_offline = false;
+	QQueue<OSM::TilePixmap> queue;
+	QCache<quint64, OSM::TilePixmap> tile_cache;
+
+public slots:
+
+private slots:
+
+signals:
+	void tileReady(OSM::TilePixmap);
+};
+
+
+#endif