def test_crs(self):
# group layer should inherit first child layer crs
options = QgsGroupLayer.LayerOptions(QgsCoordinateTransformContext())
group_layer = QgsGroupLayer('test', options)
self.assertTrue(group_layer.isValid())
layer1 = QgsVectorLayer('Point?crs=epsg:3111', 'Point', 'memory')
layer2 = QgsVectorLayer('Point?crs=epsg:4326', 'Point', 'memory')
self.assertFalse(group_layer.crs().isValid())
group_layer.setChildLayers([layer1, layer2])
self.assertEqual(group_layer.crs().authid(), 'EPSG:3111')
group_layer.setChildLayers([layer2, layer1])
self.assertEqual(group_layer.crs().authid(), 'EPSG:4326')
def test_render_group_blend_mode(self):
"""
Test rendering layers as a group limits child layer blend mode scope
"""
vl1 = QgsVectorLayer(TEST_DATA_DIR + '/lines.shp')
self.assertTrue(vl1.isValid())
vl2 = QgsVectorLayer(TEST_DATA_DIR + '/points.shp')
self.assertTrue(vl2.isValid())
options = QgsGroupLayer.LayerOptions(QgsCoordinateTransformContext())
group_layer = QgsGroupLayer('group', options)
group_layer.setChildLayers([vl2, vl1])
vl1.setBlendMode(QPainter.CompositionMode_DestinationIn)
mapsettings = QgsMapSettings()
mapsettings.setOutputSize(QSize(600, 400))
mapsettings.setOutputDpi(96)
mapsettings.setDestinationCrs(group_layer.crs())
mapsettings.setExtent(group_layer.extent())
mapsettings.setLayers([group_layer])
renderchecker = QgsMultiRenderChecker()
renderchecker.setMapSettings(mapsettings)
renderchecker.setControlPathPrefix('group_layer')
renderchecker.setControlName('expected_group_child_blend_mode')
result = renderchecker.runTest('expected_group_child_blend_mode')
TestQgsGroupLayer.report += renderchecker.report()
self.assertTrue(result)
def test_render_group_opacity(self):
"""
Test rendering layers as a group with opacity
"""
vl1 = QgsVectorLayer(TEST_DATA_DIR + '/lines.shp')
self.assertTrue(vl1.isValid())
vl2 = QgsVectorLayer(TEST_DATA_DIR + '/points.shp')
self.assertTrue(vl2.isValid())
vl3 = QgsVectorLayer(TEST_DATA_DIR + '/polys.shp')
self.assertTrue(vl3.isValid())
options = QgsGroupLayer.LayerOptions(QgsCoordinateTransformContext())
group_layer = QgsGroupLayer('group', options)
group_layer.setChildLayers([vl1, vl2, vl3])
# render group with 50% opacity
group_layer.setOpacity(0.5)
mapsettings = QgsMapSettings()
mapsettings.setOutputSize(QSize(600, 400))
mapsettings.setOutputDpi(96)
mapsettings.setDestinationCrs(group_layer.crs())
mapsettings.setExtent(group_layer.extent())
mapsettings.setLayers([group_layer])
renderchecker = QgsMultiRenderChecker()
renderchecker.setMapSettings(mapsettings)
renderchecker.setControlPathPrefix('group_layer')
renderchecker.setControlName('expected_group_opacity')
result = renderchecker.runTest('expected_group_opacity')
TestQgsGroupLayer.report += renderchecker.report()
self.assertTrue(result)
def test_render_paint_effect(self):
"""
Test rendering layers as a group with paint effect
"""
vl1 = QgsVectorLayer(TEST_DATA_DIR + '/lines.shp')
self.assertTrue(vl1.isValid())
vl2 = QgsVectorLayer(TEST_DATA_DIR + '/points.shp')
self.assertTrue(vl2.isValid())
options = QgsGroupLayer.LayerOptions(QgsCoordinateTransformContext())
group_layer = QgsGroupLayer('group', options)
group_layer.setChildLayers([vl2, vl1])
drop_shadow = QgsDropShadowEffect()
drop_shadow.setBlurLevel(0)
drop_shadow.setOpacity(1)
drop_shadow.setColor(QColor(255, 0, 255))
drop_shadow.setOffsetDistance(3)
effect_stack = QgsEffectStack()
effect_stack.appendEffect(drop_shadow)
effect_stack.appendEffect(QgsDrawSourceEffect())
group_layer.setPaintEffect(effect_stack)
mapsettings = QgsMapSettings()
mapsettings.setOutputSize(QSize(600, 400))
mapsettings.setOutputDpi(96)
mapsettings.setDestinationCrs(group_layer.crs())
mapsettings.setExtent(group_layer.extent())
mapsettings.setLayers([group_layer])
renderchecker = QgsMultiRenderChecker()
renderchecker.setMapSettings(mapsettings)
renderchecker.setControlPathPrefix('group_layer')
renderchecker.setControlName('expected_group_paint_effect')
result = renderchecker.runTest('expected_group_paint_effect')
TestQgsGroupLayer.report += renderchecker.report()
self.assertTrue(result)