def testContextProj6(self):
"""
Various tests to ensure that datum transforms are correctly set respecting context
"""
context = QgsCoordinateTransformContext()
context.addCoordinateOperation(
QgsCoordinateReferenceSystem('EPSG:28356'),
QgsCoordinateReferenceSystem('EPSG:4283'), 'proj')
transform = QgsCoordinateTransform(
QgsCoordinateReferenceSystem('EPSG:28354'),
QgsCoordinateReferenceSystem('EPSG:28353'), context)
self.assertEqual(
list(transform.context().coordinateOperations().keys()),
[('EPSG:28356', 'EPSG:4283')])
# should be no coordinate operation
self.assertEqual(transform.coordinateOperation(), '')
# should default to allowing fallback transforms
self.assertTrue(transform.allowFallbackTransforms())
transform = QgsCoordinateTransform(
QgsCoordinateReferenceSystem('EPSG:28356'),
QgsCoordinateReferenceSystem('EPSG:4283'), context)
self.assertTrue(transform.allowFallbackTransforms())
context.addCoordinateOperation(
QgsCoordinateReferenceSystem('EPSG:28356'),
QgsCoordinateReferenceSystem('EPSG:4283'), 'proj', False)
transform = QgsCoordinateTransform(
QgsCoordinateReferenceSystem('EPSG:28356'),
QgsCoordinateReferenceSystem('EPSG:4283'), context)
self.assertFalse(transform.allowFallbackTransforms())
# matching source
transform = QgsCoordinateTransform(
QgsCoordinateReferenceSystem('EPSG:28356'),
QgsCoordinateReferenceSystem('EPSG:28353'), context)
self.assertEqual(transform.coordinateOperation(), '')
# matching dest
transform = QgsCoordinateTransform(
QgsCoordinateReferenceSystem('EPSG:28354'),
QgsCoordinateReferenceSystem('EPSG:4283'), context)
self.assertEqual(transform.coordinateOperation(), '')
# matching src/dest pair
transform = QgsCoordinateTransform(
QgsCoordinateReferenceSystem('EPSG:28356'),
QgsCoordinateReferenceSystem('EPSG:4283'), context)
self.assertEqual(transform.coordinateOperation(), 'proj')
# test manual overwriting
transform.setCoordinateOperation('proj2')
self.assertEqual(transform.coordinateOperation(), 'proj2')
transform.setAllowFallbackTransforms(False)
self.assertFalse(transform.allowFallbackTransforms())
transform.setAllowFallbackTransforms(True)
self.assertTrue(transform.allowFallbackTransforms())
# test that auto operation setting occurs when updating src/dest crs
transform.setSourceCrs(QgsCoordinateReferenceSystem('EPSG:28356'))
self.assertEqual(transform.coordinateOperation(), 'proj')
transform.setCoordinateOperation('proj2')
transform.setDestinationCrs(QgsCoordinateReferenceSystem('EPSG:4283'))
self.assertEqual(transform.coordinateOperation(), 'proj')
transform.setCoordinateOperation('proj2')
# delayed context set
transform = QgsCoordinateTransform()
self.assertEqual(transform.coordinateOperation(), '')
transform.setSourceCrs(QgsCoordinateReferenceSystem('EPSG:28356'))
transform.setDestinationCrs(QgsCoordinateReferenceSystem('EPSG:4283'))
self.assertEqual(transform.coordinateOperation(), '')
transform.setContext(context)
self.assertEqual(transform.coordinateOperation(), 'proj')
self.assertEqual(
list(transform.context().coordinateOperations().keys()),
[('EPSG:28356', 'EPSG:4283')])
