def testContextSingle(self): """ Various tests to ensure that datum transforms are correctly set respecting context """ context = QgsCoordinateTransformContext() context.addSourceDatumTransform(QgsCoordinateReferenceSystem('EPSG:28356'), 1) context.addDestinationDatumTransform(QgsCoordinateReferenceSystem('EPSG:4283'), 2) context.addSourceDestinationDatumTransform(QgsCoordinateReferenceSystem('EPSG:28356'), QgsCoordinateReferenceSystem('EPSG:4283'), 3, 4) transform = QgsCoordinateTransform(QgsCoordinateReferenceSystem('EPSG:28354'), QgsCoordinateReferenceSystem('EPSG:28353'), context) # should be no datum transforms self.assertEqual(transform.sourceDatumTransformId(), -1) self.assertEqual(transform.destinationDatumTransformId(), -1) # matching source transform = QgsCoordinateTransform(QgsCoordinateReferenceSystem('EPSG:28356'), QgsCoordinateReferenceSystem('EPSG:28353'), context) self.assertEqual(transform.sourceDatumTransformId(), 1) self.assertEqual(transform.destinationDatumTransformId(), -1) # matching dest transform = QgsCoordinateTransform(QgsCoordinateReferenceSystem('EPSG:28354'), QgsCoordinateReferenceSystem('EPSG:4283'), context) self.assertEqual(transform.sourceDatumTransformId(), -1) self.assertEqual(transform.destinationDatumTransformId(), 2) # matching src/dest pair transform = QgsCoordinateTransform(QgsCoordinateReferenceSystem('EPSG:28356'), QgsCoordinateReferenceSystem('EPSG:4283'), context) self.assertEqual(transform.sourceDatumTransformId(), 3) self.assertEqual(transform.destinationDatumTransformId(), 4) # test manual overwriting transform.setSourceDatumTransform(11) transform.setDestinationDatumTransform(13) self.assertEqual(transform.sourceDatumTransformId(), 11) self.assertEqual(transform.destinationDatumTransformId(), 13) # test that auto datum setting occurs when updating src/dest crs transform.setSourceCrs(QgsCoordinateReferenceSystem('EPSG:28356')) self.assertEqual(transform.sourceDatumTransformId(), 3) self.assertEqual(transform.destinationDatumTransformId(), 4) transform.setSourceDatumTransform(11) transform.setDestinationDatumTransform(13) transform.setDestinationCrs(QgsCoordinateReferenceSystem('EPSG:4283')) self.assertEqual(transform.sourceDatumTransformId(), 3) self.assertEqual(transform.destinationDatumTransformId(), 4) transform.setSourceDatumTransform(11) transform.setDestinationDatumTransform(13) # delayed context set transform = QgsCoordinateTransform() self.assertEqual(transform.sourceDatumTransformId(), -1) self.assertEqual(transform.destinationDatumTransformId(), -1) transform.setSourceCrs(QgsCoordinateReferenceSystem('EPSG:28356')) transform.setDestinationCrs(QgsCoordinateReferenceSystem('EPSG:4283')) self.assertEqual(transform.sourceDatumTransformId(), -1) self.assertEqual(transform.destinationDatumTransformId(), -1) transform.setContext(context) self.assertEqual(transform.sourceDatumTransformId(), 3) self.assertEqual(transform.destinationDatumTransformId(), 4)
def testProjectContext(self): """ Test creating transform using convenience constructor which takes project reference """ p = QgsProject() context = p.transformContext() context.addSourceDestinationDatumTransform(QgsCoordinateReferenceSystem('EPSG:28356'), QgsCoordinateReferenceSystem('EPSG:3111'), 1, 2) p.setTransformContext(context) transform = QgsCoordinateTransform(QgsCoordinateReferenceSystem('EPSG:28356'), QgsCoordinateReferenceSystem('EPSG:3111'), p) self.assertEqual(transform.sourceDatumTransformId(), 1) self.assertEqual(transform.destinationDatumTransformId(), 2)