本文整理汇总了Python中qgis.core.QgsProject.blockDirtying方法的典型用法代码示例。如果您正苦于以下问题：Python QgsProject.blockDirtying方法的具体用法？Python QgsProject.blockDirtying怎么用？Python QgsProject.blockDirtying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.blockDirtying方法的1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: testDirtyBlocker
# 需要导入模块: from qgis.core import QgsProject [as 别名]
# 或者: from qgis.core.QgsProject import blockDirtying [as 别名]
def testDirtyBlocker(self):
# first test manual QgsProjectDirtyBlocker construction
p = QgsProject()
dirty_spy = QSignalSpy(p.isDirtyChanged)
# ^ will do *whatever* it takes to discover the enemy's secret plans!
# simple checks
p.setDirty(True)
self.assertTrue(p.isDirty())
self.assertEqual(len(dirty_spy), 1)
self.assertEqual(dirty_spy[-1], [True])
p.setDirty(True) # already dirty
self.assertTrue(p.isDirty())
self.assertEqual(len(dirty_spy), 1)
p.setDirty(False)
self.assertFalse(p.isDirty())
self.assertEqual(len(dirty_spy), 2)
self.assertEqual(dirty_spy[-1], [False])
p.setDirty(True)
self.assertTrue(p.isDirty())
self.assertEqual(len(dirty_spy), 3)
self.assertEqual(dirty_spy[-1], [True])
# with a blocker
blocker = QgsProjectDirtyBlocker(p)
# blockers will allow cleaning projects
p.setDirty(False)
self.assertFalse(p.isDirty())
self.assertEqual(len(dirty_spy), 4)
self.assertEqual(dirty_spy[-1], [False])
# but not dirtying!
p.setDirty(True)
self.assertFalse(p.isDirty())
self.assertEqual(len(dirty_spy), 4)
self.assertEqual(dirty_spy[-1], [False])
# nested block
blocker2 = QgsProjectDirtyBlocker(p)
p.setDirty(True)
self.assertFalse(p.isDirty())
self.assertEqual(len(dirty_spy), 4)
self.assertEqual(dirty_spy[-1], [False])
del blocker2
p.setDirty(True)
self.assertFalse(p.isDirty())
self.assertEqual(len(dirty_spy), 4)
self.assertEqual(dirty_spy[-1], [False])
del blocker
p.setDirty(True)
self.assertTrue(p.isDirty())
self.assertEqual(len(dirty_spy), 5)
self.assertEqual(dirty_spy[-1], [True])
# using python context manager
with QgsProject.blockDirtying(p):
# cleaning allowed
p.setDirty(False)
self.assertFalse(p.isDirty())
self.assertEqual(len(dirty_spy), 6)
self.assertEqual(dirty_spy[-1], [False])
# but not dirtying!
p.setDirty(True)
self.assertFalse(p.isDirty())
self.assertEqual(len(dirty_spy), 6)
self.assertEqual(dirty_spy[-1], [False])
# unblocked
p.setDirty(True)
self.assertTrue(p.isDirty())
self.assertEqual(len(dirty_spy), 7)
self.assertEqual(dirty_spy[-1], [True])