def testFullExtentWithBasemap(self):
"""
Test that basemap layer's extents are ignored when calculating the full extent of
a project, UNLESS only basemap layers are present
"""
p = QgsProject()
p.setCrs(QgsCoordinateReferenceSystem('EPSG:3857'))
self.assertTrue(p.viewSettings().fullExtent().isNull())
# add only a basemap layer
xyz_layer = QgsRasterLayer(
"type=xyz&url=file://tile.openstreetmap.org/%7Bz%7D/%7Bx%7D/%7By%7D.png&zmax=19&zmin=0",
'', "wms")
self.assertEqual(xyz_layer.properties(),
Qgis.MapLayerProperty.IsBasemapLayer)
p.addMapLayer(xyz_layer)
# should be global extent of xyz layer, as only basemap layers are present in project
self.assertAlmostEqual(p.viewSettings().fullExtent().xMinimum(),
-20037508, -2)
self.assertAlmostEqual(p.viewSettings().fullExtent().xMaximum(),
20037508, -2)
self.assertAlmostEqual(p.viewSettings().fullExtent().yMinimum(),
-20037508, -2)
self.assertAlmostEqual(p.viewSettings().fullExtent().yMaximum(),
20037508, -2)
# add a non-basemap layer
shapefile = os.path.join(TEST_DATA_DIR, 'lines.shp')
layer = QgsVectorLayer(shapefile, 'Lines', 'ogr')
p.addMapLayer(layer)
# now project extent should ignore basemap layer extents
self.assertAlmostEqual(p.viewSettings().fullExtent().xMinimum(),
-13093754, -2)
self.assertAlmostEqual(p.viewSettings().fullExtent().xMaximum(),
-9164115, -2)
self.assertAlmostEqual(p.viewSettings().fullExtent().yMinimum(),
2657217, -2)
self.assertAlmostEqual(p.viewSettings().fullExtent().yMaximum(),
5809709, -2)
self.assertEqual(p.viewSettings().fullExtent().crs().authid(),
'EPSG:3857')
