本文整理汇总了Python中qgis.core.QgsProject.removeMapLayer方法的典型用法代码示例。如果您正苦于以下问题：Python QgsProject.removeMapLayer方法的具体用法？Python QgsProject.removeMapLayer怎么用？Python QgsProject.removeMapLayer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.removeMapLayer方法的2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: testCustomLayerOrder
# 需要导入模块: from qgis.core import QgsProject [as 别名]
# 或者: from qgis.core.QgsProject import removeMapLayer [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(), [])示例2: testThemeChanged
# 需要导入模块: from qgis.core import QgsProject [as 别名]
# 或者: from qgis.core.QgsProject import removeMapLayer [as 别名]
def testThemeChanged(self):
"""
Test that the mapTheme(s)Changed signals are correctly emitted in all relevant situations
"""
project = QgsProject()
collection = QgsMapThemeCollection(project)
record = QgsMapThemeCollection.MapThemeRecord()
theme_changed_spy = QSignalSpy(collection.mapThemeChanged)
themes_changed_spy = QSignalSpy(collection.mapThemesChanged)
collection.insert('theme1', record)
self.assertEqual(len(theme_changed_spy), 1)
self.assertEqual(theme_changed_spy[-1][0], 'theme1')
self.assertEqual(len(themes_changed_spy), 1)
# reinsert
collection.insert('theme1', record)
self.assertEqual(len(theme_changed_spy), 2)
self.assertEqual(theme_changed_spy[-1][0], 'theme1')
self.assertEqual(len(themes_changed_spy), 2)
# update
collection.update('theme1', record)
self.assertEqual(len(theme_changed_spy), 3)
self.assertEqual(theme_changed_spy[-1][0], 'theme1')
self.assertEqual(len(themes_changed_spy), 3)
# remove invalid
collection.removeMapTheme('i wish i was a slave to an age old trade... like riding around on rail cars and working long days')
self.assertEqual(len(theme_changed_spy), 3)
self.assertEqual(len(themes_changed_spy), 3)
# remove valid
collection.removeMapTheme('theme1')
self.assertEqual(len(theme_changed_spy), 3) # not changed - removed!
self.assertEqual(len(themes_changed_spy), 4)
# reinsert
collection.insert('theme1', record)
self.assertEqual(len(theme_changed_spy), 4)
self.assertEqual(len(themes_changed_spy), 5)
# clear
collection.clear()
self.assertEqual(len(theme_changed_spy), 4) # not changed - removed!
self.assertEqual(len(themes_changed_spy), 6)
# check that mapThemeChanged is emitted if layer is removed
layer = QgsVectorLayer("Point?field=fldtxt:string",
"layer1", "memory")
layer2 = QgsVectorLayer("Point?field=fldtxt:string",
"layer2", "memory")
project.addMapLayers([layer, layer2])
# record for layer1
record.addLayerRecord(QgsMapThemeCollection.MapThemeLayerRecord(layer))
collection.insert('theme1', record)
self.assertEqual(len(theme_changed_spy), 5)
self.assertEqual(len(themes_changed_spy), 7)
# now kill layer 2
project.removeMapLayer(layer2)
self.assertEqual(len(theme_changed_spy), 5) # signal should not be emitted - layer is not in record
# now kill layer 1
project.removeMapLayer(layer)
app.processEvents()
self.assertEqual(len(theme_changed_spy), 6) # signal should be emitted - layer is in record