class MapTileHTTPLoader(QObject):
tileLoaded = Signal(int, int, int, QByteArray)
def __init__(self, cacheSize=DEFAULT_CACHE_SIZE, userAgent='(PyQt) TileMap 1.0', parent=None):
QObject.__init__(self, parent=parent)
self._manager = None
self._cache = None
self._cacheSize = cacheSize
try:
# Convert user agent to bytes
userAgent = userAgent.encode()
except:
# no encode method exists. This hsould be the Python 2 case
pass
self._userAgent = userAgent
self._tileInDownload = dict()
@Slot(int, int, int, str)
def loadTile(self, x, y, zoom, url):
if self._manager is None:
self._manager = QNetworkAccessManager(parent=self)
self._manager.finished.connect(self.handleNetworkData)
cache = QNetworkDiskCache()
cacheDir = getCacheFolder()
cache.setCacheDirectory(cacheDir)
cache.setMaximumCacheSize(self._cacheSize)
self._manager.setCache(cache)
key = (x, y, zoom)
url = QUrl(url)
if key not in self._tileInDownload:
# Request the image to the map service
request = QNetworkRequest(url=url)
request.setRawHeader(b'User-Agent', self._userAgent)
request.setAttribute(QNetworkRequest.User, key)
request.setAttribute(QNetworkRequest.CacheLoadControlAttribute, QNetworkRequest.PreferCache)
self._tileInDownload[key] = self._manager.get(request)
@Slot(QNetworkReply)
def handleNetworkData(self, reply):
tp = getQVariantValue(reply.request().attribute(QNetworkRequest.User))
if tp in self._tileInDownload:
del self._tileInDownload[tp]
if not reply.error():
data = reply.readAll()
self.tileLoaded.emit(tp[0], tp[1], tp[2], data)
reply.close()
reply.deleteLater()
@Slot()
def abortRequest(self, x, y, zoom):
p = (x, y, zoom)
if p in self._tileInDownload:
reply = self._tileInDownload[p]
del self._tileInDownload[p]
reply.close()
reply.deleteLater()
@Slot()
def abortAllRequests(self):
for x, y, zoom in list(self._tileInDownload.keys()):
self.abortRequest(x, y, zoom)
class MapTileHTTPLoader(QObject):
tileLoaded = Signal(int, int, int, QByteArray)
def __init__(self,
cacheSize=DEFAULT_CACHE_SIZE,
userAgent='(PyQt) TileMap 1.0',
parent=None):
QObject.__init__(self, parent=parent)
self._manager = None
self._cache = None
self._cacheSize = cacheSize
try:
# Convert user agent to bytes
userAgent = userAgent.encode()
except:
# no encode method exists. This hsould be the Python 2 case
pass
self._userAgent = userAgent
self._tileInDownload = dict()
@Slot(int, int, int, str)
def loadTile(self, x, y, zoom, url):
if self._manager is None:
self._manager = QNetworkAccessManager(parent=self)
self._manager.finished.connect(self.handleNetworkData)
cache = QNetworkDiskCache()
cacheDir = getCacheFolder()
cache.setCacheDirectory(cacheDir)
cache.setMaximumCacheSize(self._cacheSize)
self._manager.setCache(cache)
key = (x, y, zoom)
url = QUrl(url)
if key not in self._tileInDownload:
# Request the image to the map service
request = QNetworkRequest(url=url)
request.setRawHeader(b'User-Agent', self._userAgent)
request.setAttribute(QNetworkRequest.User, key)
request.setAttribute(QNetworkRequest.CacheLoadControlAttribute,
QNetworkRequest.PreferCache)
self._tileInDownload[key] = self._manager.get(request)
@Slot(QNetworkReply)
def handleNetworkData(self, reply):
tp = getQVariantValue(reply.request().attribute(QNetworkRequest.User))
if tp in self._tileInDownload:
del self._tileInDownload[tp]
if not reply.error():
data = reply.readAll()
self.tileLoaded.emit(tp[0], tp[1], tp[2], data)
reply.close()
reply.deleteLater()
@Slot()
def abortRequest(self, x, y, zoom):
p = (x, y, zoom)
if p in self._tileInDownload:
reply = self._tileInDownload[p]
del self._tileInDownload[p]
reply.close()
reply.deleteLater()
@Slot()
def abortAllRequests(self):
for x, y, zoom in list(self._tileInDownload.keys()):
self.abortRequest(x, y, zoom)
