[vt] Make sure a VT layer gets a proper Swiss extent on an empty proj…

…ect (if the project is not empty, we'll leave the current extent untouched, since chances are users have already the extent they want)

swiss_locator/core/filters/swiss_locator_filter.py

@@ -443,49 +443,50 @@ def triggerResult(self, result: QgsLocatorResult):
 
  if not ch_layer.isValid():
  msg = self.tr(
- "Cannot load Vector Tiles layer: {}".format(
- swiss_result.title
- )
+ "Cannot load Vector Tiles layer: {}".format(swiss_result.title)
  )
  level = Qgis.MessageLevel.Warning
  self.info(msg, level)
  else:
  ch_layer.setLabelsEnabled(True)
  ch_layer.loadDefaultMetadata()
 
- error, warnings = '', []
+ error, warnings = "", []
  res, sublayers = ch_layer.loadDefaultStyleAndSubLayers(error, warnings)
 
  if sublayers:
  msg = self.tr(
  "Sublayers found ({}): {}".format(
  swiss_result.title,
- "; ".join([sublayer.name() for sublayer in sublayers])
+ "; ".join([sublayer.name() for sublayer in sublayers]),
  )
  )
  level = Qgis.MessageLevel.Info
  self.info(msg, level)
  if error or warnings:
  msg = self.tr(
  "Error/warning found while loading default styles and sublayers for layer {}. Error: {} Warning: {}".format(
- swiss_result.title,
- error,
- "; ".join(warnings)
+ swiss_result.title, error, "; ".join(warnings)
  )
  )
  level = Qgis.MessageLevel.Warning
  self.info(msg, level)
 
- msg = self.tr(
- "Layer added to the map: {}".format(
- swiss_result.title
- )
- )
+ msg = self.tr("Layer added to the map: {}".format(swiss_result.title))
  level = Qgis.MessageLevel.Info
  self.info(msg, level)
 
  # Load basemap layers at the bottom of the layer tree
  root = QgsProject.instance().layerTreeRoot()
+ empty_project = not QgsProject.instance().mapLayers()
+
+ if empty_project:
+ # Set the Swiss extent in EPSG:3857 (VT's CRS)
+ extent = QgsRectangle(624991, 5725825, 1209826, 6089033)
+ ch_layer.setExtent(extent)
+ for _layer in sublayers:
+ _layer.setExtent(extent)
+
  if sublayers:
  # Sublayers should be loaded on top of the vector tile
  # layer. We group them to keep them all together.