def testCalculateFeatureRequestGeometry(self):
region = QgsMapClippingRegion(QgsGeometry.fromWkt('Polygon((0 0, 1 0, 1 1, 0 1, 0 0))'))
region.setFeatureClip(QgsMapClippingRegion.FeatureClippingType.NoClipping)
region2 = QgsMapClippingRegion(QgsGeometry.fromWkt('Polygon((0 0, 0.1 0, 0.1 2, 0 2, 0 0))'))
region2.setFeatureClip(QgsMapClippingRegion.FeatureClippingType.NoClipping)
rc = QgsRenderContext()
geom, should_clip = QgsMapClippingUtils.calculateFeatureRequestGeometry([], rc)
self.assertFalse(should_clip)
self.assertTrue(geom.isNull())
geom, should_clip = QgsMapClippingUtils.calculateFeatureRequestGeometry([region], rc)
geom.normalize()
self.assertTrue(should_clip)
self.assertEqual(geom.asWkt(1), 'Polygon ((0 0, 0 1, 1 1, 1 0, 0 0))')
geom, should_clip = QgsMapClippingUtils.calculateFeatureRequestGeometry([region, region2], rc)
geom.normalize()
self.assertTrue(should_clip)
self.assertEqual(geom.asWkt(1), 'Polygon ((0 0, 0 1, 0.1 1, 0.1 0, 0 0))')
rc.setCoordinateTransform(QgsCoordinateTransform(QgsCoordinateReferenceSystem('EPSG:3857'), QgsCoordinateReferenceSystem('EPSG:4326'), QgsProject.instance()))
geom, should_clip = QgsMapClippingUtils.calculateFeatureRequestGeometry([region, region2], rc)
geom.normalize()
self.assertTrue(should_clip)
self.assertEqual(geom.asWkt(0), 'Polygon ((0 0, 0 111325, 11132 111325, 11132 0, 0 0))')
def testLabelIntersectionGeometry(self):
region = QgsMapClippingRegion(
QgsGeometry.fromWkt('Polygon((0 0, 1 0, 1 1, 0 1, 0 0))'))
region.setFeatureClip(
QgsMapClippingRegion.FeatureClippingType.ClipToIntersection)
region2 = QgsMapClippingRegion(
QgsGeometry.fromWkt('Polygon((0 0, 0.1 0, 0.1 2, 0 2, 0 0))'))
region2.setFeatureClip(
QgsMapClippingRegion.FeatureClippingType.NoClipping)
region3 = QgsMapClippingRegion(
QgsGeometry.fromWkt('Polygon((0 0, 0.1 0, 0.1 2, 0 2, 0 0))'))
region3.setFeatureClip(
QgsMapClippingRegion.FeatureClippingType.ClipPainterOnly)
rc = QgsRenderContext()
geom, should_clip = QgsMapClippingUtils.calculateLabelIntersectionGeometry(
[], rc)
self.assertFalse(should_clip)
self.assertTrue(geom.isNull())
geom, should_clip = QgsMapClippingUtils.calculateLabelIntersectionGeometry(
[region], rc)
self.assertTrue(should_clip)
self.assertEqual(geom.asWkt(1), 'Polygon ((0 0, 1 0, 1 1, 0 1, 0 0))')
# region2 is a Intersects type clipping region, should not apply here
geom, should_clip = QgsMapClippingUtils.calculateLabelIntersectionGeometry(
[region2], rc)
self.assertFalse(should_clip)
self.assertTrue(geom.isNull())
geom, should_clip = QgsMapClippingUtils.calculateLabelIntersectionGeometry(
[region, region2], rc)
self.assertTrue(should_clip)
self.assertEqual(geom.asWkt(1), 'Polygon ((0 0, 1 0, 1 1, 0 1, 0 0))')
# region3 is a PainterClip type clipping region, MUST be applied for labels
geom, should_clip = QgsMapClippingUtils.calculateLabelIntersectionGeometry(
[region, region2, region3], rc)
self.assertTrue(should_clip)
self.assertEqual(geom.asWkt(1),
'Polygon ((0.1 0, 0 0, 0 1, 0.1 1, 0.1 0))')
rc.setCoordinateTransform(
QgsCoordinateTransform(QgsCoordinateReferenceSystem('EPSG:3857'),
QgsCoordinateReferenceSystem('EPSG:4326'),
QgsProject.instance()))
geom, should_clip = QgsMapClippingUtils.calculateLabelIntersectionGeometry(
[region, region3], rc)
self.assertTrue(should_clip)
self.assertEqual(
geom.asWkt(0),
'Polygon ((11132 0, 0 0, 0 111325, 11132 111325, 11132 0))')