本文整理汇总了Python中qgis.core.QgsProject.clear方法的典型用法代码示例。如果您正苦于以下问题：Python QgsProject.clear方法的具体用法？Python QgsProject.clear怎么用？Python QgsProject.clear使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.core.QgsProject的用法示例。
在下文中一共展示了QgsProject.clear方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: testSaveRestoreFromProject
# 需要导入模块: from qgis.core import QgsProject [as 别名]
# 或者: from qgis.core.QgsProject import clear [as 别名]
def testSaveRestoreFromProject(self):
p = QgsProject()
provider = ProjectProvider(p)
# add some algorithms
alg = QgsProcessingModelAlgorithm('test name', 'test group')
provider.add_model(alg)
alg2 = QgsProcessingModelAlgorithm('test name2', 'test group2')
provider.add_model(alg2)
self.assertEqual(len(provider.algorithms()), 2)
tmp_file = QTemporaryFile()
tmp_file.open() # fileName is no available until open
temp_path = tmp_file.fileName()
tmp_file.close()
self.assertTrue(p.write(temp_path))
# restore project
p2 = QgsProject()
provider2 = ProjectProvider(p2)
self.assertTrue(p2.read(temp_path))
self.assertEqual(len(provider2.model_definitions), 2)
self.assertEqual(len(provider2.algorithms()), 2)
self.assertEqual(provider2.algorithms()[0].name(), 'test name')
self.assertEqual(provider2.algorithms()[0].group(), 'test group')
self.assertEqual(provider2.algorithms()[1].name(), 'test name2')
self.assertEqual(provider2.algorithms()[1].group(), 'test group2')
# clear project should remove algorithms
p2.clear()
self.assertFalse(provider2.algorithms())示例2: test_zip_unzip
# 需要导入模块: from qgis.core import QgsProject [as 别名]
# 或者: from qgis.core.QgsProject import clear [as 别名]
def test_zip_unzip(self):
tmpDir = QTemporaryDir()
tmpFile = "{}/project.qgz".format(tmpDir.path())
project = QgsProject()
l0 = QgsVectorLayer(os.path.join(TEST_DATA_DIR, "points.shp"), "points", "ogr")
l1 = QgsVectorLayer(os.path.join(TEST_DATA_DIR, "lines.shp"), "lines", "ogr")
project.addMapLayers([l0, l1])
self.assertTrue(project.write(tmpFile))
project2 = QgsProject()
self.assertFalse(project2.isZipped())
self.assertTrue(project2.fileName() == "")
self.assertTrue(project2.read(tmpFile))
self.assertTrue(project2.isZipped())
self.assertTrue(project2.fileName() == tmpFile)
layers = project2.mapLayers()
self.assertEqual(len(layers.keys()), 2)
self.assertTrue(layers[l0.id()].isValid(), True)
self.assertTrue(layers[l1.id()].isValid(), True)
project2.clear()
self.assertFalse(project2.isZipped())示例3: testProject
# 需要导入模块: from qgis.core import QgsProject [as 别名]
# 或者: from qgis.core.QgsProject import clear [as 别名]
def testProject(self):
p = QgsProject()
m = self.createTestMetadata()
metadata_changed_spy = QSignalSpy(p.metadataChanged)
p.setMetadata(m)
self.assertEqual(len(metadata_changed_spy), 1)
self.checkExpectedMetadata(p.metadata())
p.clear()
self.assertEqual(len(metadata_changed_spy), 2)
self.assertEqual(p.metadata().title(), '')
# test that the project title is just a shortcut to the metadata title field
p.setTitle('my title')
self.assertEqual(p.metadata().title(), 'my title')
m.setTitle('my title 2')
p.setMetadata(m)
self.assertEqual(p.title(), 'my title 2')示例4: testCustomLayerOrder
# 需要导入模块: from qgis.core import QgsProject [as 别名]
# 或者: from qgis.core.QgsProject import clear [as 别名]
def testCustomLayerOrder(self):
""" test project layer order"""
prj = QgsProject()
layer = QgsVectorLayer("Point?field=fldtxt:string",
"layer1", "memory")
layer2 = QgsVectorLayer("Point?field=fldtxt:string",
"layer2", "memory")
layer3 = QgsVectorLayer("Point?field=fldtxt:string",
"layer3", "memory")
prj.addMapLayers([layer, layer2, layer3])
layer_order_changed_spy = QSignalSpy(prj.layerTreeRoot().customLayerOrderChanged)
prj.layerTreeRoot().setCustomLayerOrder([layer2, layer])
self.assertEqual(len(layer_order_changed_spy), 1)
prj.layerTreeRoot().setCustomLayerOrder([layer2, layer])
self.assertEqual(len(layer_order_changed_spy), 1) # no signal, order not changed
self.assertEqual(prj.layerTreeRoot().customLayerOrder(), [layer2, layer])
prj.layerTreeRoot().setCustomLayerOrder([layer])
self.assertEqual(prj.layerTreeRoot().customLayerOrder(), [layer])
self.assertEqual(len(layer_order_changed_spy), 2)
# remove a layer
prj.layerTreeRoot().setCustomLayerOrder([layer2, layer, layer3])
self.assertEqual(len(layer_order_changed_spy), 3)
prj.removeMapLayer(layer)
self.assertEqual(prj.layerTreeRoot().customLayerOrder(), [layer2, layer3])
self.assertEqual(len(layer_order_changed_spy), 4)
# save and restore
file_name = os.path.join(QDir.tempPath(), 'proj.qgs')
prj.setFileName(file_name)
prj.write()
prj2 = QgsProject()
prj2.setFileName(file_name)
prj2.read()
self.assertEqual([l.id() for l in prj2.layerTreeRoot().customLayerOrder()], [layer2.id(), layer3.id()])
# clear project
prj.clear()
self.assertEqual(prj.layerTreeRoot().customLayerOrder(), [])