MapViewTileProviderBase add cacheDir()

libs/map/mapview_tile_provider_base.h

@@ -40,6 +40,7 @@ public:
 	virtual QString name() const                   = 0;
 	virtual bool requestTile(OSM::TileIndex index) = 0;
 	virtual QSize tileSize()                       = 0;
+	virtual QString cacheDir() const { return name(); }
 
 protected:
 	void initParameters(const PIValueTree & vt);
@@ -47,10 +48,12 @@ protected:
 	virtual void applyParameters() {}
 
 private:
+	void applyParametersIntenal();
 	PIValueTree parameters;
 
 signals:
 	void tileReady(OSM::TileIndex index, QPixmap pm);
+	void parametersChanged();
 };