本文整理汇总了Python中qgis.gui.QgsExpressionBuilderWidget.model方法的典型用法代码示例。如果您正苦于以下问题：Python QgsExpressionBuilderWidget.model方法的具体用法？Python QgsExpressionBuilderWidget.model怎么用？Python QgsExpressionBuilderWidget.model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.gui.QgsExpressionBuilderWidget的用法示例。
在下文中一共展示了QgsExpressionBuilderWidget.model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: testLayers
# 需要导入模块: from qgis.gui import QgsExpressionBuilderWidget [as 别名]
# 或者: from qgis.gui.QgsExpressionBuilderWidget import model [as 别名]
def testLayers(self):
""" check that layers are shown in widget model"""
p = QgsProject.instance()
layer = QgsVectorLayer("Point", "layer1", "memory")
layer2 = QgsVectorLayer("Point", "layer2", "memory")
p.addMapLayers([layer, layer2])
w = QgsExpressionBuilderWidget()
m = w.model()
# check that layers are shown
items = m.findItems('layer1', Qt.MatchRecursive)
self.assertEqual(len(items), 1)
items = m.findItems('layer2', Qt.MatchRecursive)
self.assertEqual(len(items), 1)
# change project
p2 = QgsProject()
layer3 = QgsVectorLayer("Point", "layer3", "memory")
p2.addMapLayers([layer3])
w.setProject(p2)
m = w.model()
items = m.findItems('layer1', Qt.MatchRecursive)
self.assertEqual(len(items), 0)
items = m.findItems('layer2', Qt.MatchRecursive)
self.assertEqual(len(items), 0)
items = m.findItems('layer3', Qt.MatchRecursive)
self.assertEqual(len(items), 1)示例2: testRelations
# 需要导入模块: from qgis.gui import QgsExpressionBuilderWidget [as 别名]
# 或者: from qgis.gui.QgsExpressionBuilderWidget import model [as 别名]
def testRelations(self):
""" check that layers are shown in widget model"""
p = QgsProject.instance()
# not valid, but doesn't matter for test....
rel = QgsRelation()
rel.setId('rel1')
rel.setName('Relation Number One')
rel.setReferencingLayer(self.referencingLayer.id())
rel.setReferencedLayer(self.referencedLayer.id())
rel.addFieldPair('foreignkey', 'y')
rel2 = QgsRelation()
rel2.setId('rel2')
rel2.setName('Relation Number Two')
rel2.setReferencingLayer(self.referencingLayer.id())
rel2.setReferencedLayer(self.referencedLayer.id())
rel2.addFieldPair('foreignkey', 'y')
p.relationManager().addRelation(rel)
p.relationManager().addRelation(rel2)
w = QgsExpressionBuilderWidget()
m = w.model()
# check that relations are shown
items = m.findItems('Relation Number One', Qt.MatchRecursive)
self.assertEqual(len(items), 1)
items = m.findItems('Relation Number Two', Qt.MatchRecursive)
self.assertEqual(len(items), 1)示例3: testFunctionPresent
# 需要导入模块: from qgis.gui import QgsExpressionBuilderWidget [as 别名]
# 或者: from qgis.gui.QgsExpressionBuilderWidget import model [as 别名]
def testFunctionPresent(self):
""" check through widget model to ensure it is initially populated with functions """
w = QgsExpressionBuilderWidget()
m = w.model()
# check that some standard expression functions are shown
items = m.findItems('lower', Qt.MatchRecursive)
self.assertEqual(len(items), 1)
items = m.findItems('upper', Qt.MatchRecursive)
self.assertEqual(len(items), 1)
items = m.findItems('asdasdasda#[email protected]#$', Qt.MatchRecursive)
self.assertEqual(len(items), 0)示例4: testVariables
# 需要导入模块: from qgis.gui import QgsExpressionBuilderWidget [as 别名]
# 或者: from qgis.gui.QgsExpressionBuilderWidget import model [as 别名]
def testVariables(self):
""" check through widget model to ensure it is populated with variables """
w = QgsExpressionBuilderWidget()
m = w.model()
s = QgsExpressionContextScope()
s.setVariable('my_var1', 'x')
s.setVariable('my_var2', 'y')
c = QgsExpressionContext()
c.appendScope(s)
# check that variables are added when setting context
w.setExpressionContext(c)
items = m.findItems('my_var1', Qt.MatchRecursive)
self.assertEqual(len(items), 1)
items = m.findItems('my_var2', Qt.MatchRecursive)
self.assertEqual(len(items), 1)
items = m.findItems('not_my_var', Qt.MatchRecursive)
self.assertEqual(len(items), 0)
# double check that functions are still only there once
items = m.findItems('lower', Qt.MatchRecursive)
self.assertEqual(len(items), 1)
items = m.findItems('upper', Qt.MatchRecursive)
self.assertEqual(len(items), 1)