I created a little plugin to geocode addresses using the HERE API and QGIS 3.
Especially in batch mode, I can see that the plugin is iterating over my features in a table and my messageBar progress is working as expected.
After a few seconds, QGIS gets unresponsive and the progressbar stops. This happens in a non-reproducible way.
The relevant code section is:
progressMessageBar = iface.messageBar().createMessage("Looping through " + str(layer.featureCount()) +" records ...")
progress = QProgressBar()
progress.setMaximum(layer.featureCount())
progress.setAlignment(Qt.AlignLeft|Qt.AlignVCenter)
progressMessageBar.layout().addWidget(progress)
iface.messageBar().pushWidget(progressMessageBar, level=1)
for id in range(0, layer.featureCount()-1):
urlPart=""
oldAddress=""
for key in addressLists.keys():
if key != "oldIds":
urlPart+="&" + key + "=" + addressLists[key][id]
oldAddress += addressLists[key][id] + ","
url = "https://geocoder.api.here.com/6.2/geocode.json?app_id=" + appId + "&app_code=" + appCode + urlPart
r = requests.get(url)
if r.status_code == 200:
if len(json.loads(r.text)["Response"]["View"])>0:
#as the response may hold more than one result we only use the best one:
responseAddress = json.loads(r.text)["Response"]["View"][0]["Result"][0]
geocodeResponse = self.convertGeocodeResponse(responseAddress)
lat = responseAddress["Location"]["DisplayPosition"]["Latitude"]
lng = responseAddress["Location"]["DisplayPosition"]["Longitude"]
ResultFet = QgsFeature()
ResultFet.setGeometry(QgsGeometry.fromPointXY(QgsPointXY(lng,lat)))
ResultFet.setAttributes([
addressLists["oldIds"][id],
etc...
])
ResultFeatureList.append(ResultFet)
progress.setValue(id)
iface.mainWindow().repaint()
pr.addFeatures(ResultFeatureList)
iface.messageBar().clearWidgets()
Here is the behaviour in a gif:
The main functionality below is embedded in a function which is connected with the button. The connection is defined in the main run function of the plugin:
def run(self):
self.dlg.show()
self.dlg.LayerSelect_2.currentIndexChanged.connect(self.searchFieldsPopulate)
self.dlg.batchGeocodeFieldsButton.clicked.connect(self.batchGeocodeFields)
result = self.dlg.exec_()
if result:
pass
UPDATE When adding a short sleep prior and after progressbar update the progress bar seems to update better and the system is responding and not showing any unresponsive messages in the plugin/QGIS application.
time.sleep(0.2)
progress.setValue(id)
time.sleep(0.2)
