本文整理汇总了Python中qgis.core.QgsCategorizedSymbolRenderer.filter方法的典型用法代码示例。如果您正苦于以下问题:Python QgsCategorizedSymbolRenderer.filter方法的具体用法?Python QgsCategorizedSymbolRenderer.filter怎么用?Python QgsCategorizedSymbolRenderer.filter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.QgsCategorizedSymbolRenderer
的用法示例。
在下文中一共展示了QgsCategorizedSymbolRenderer.filter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: testFilter
# 需要导入模块: from qgis.core import QgsCategorizedSymbolRenderer [as 别名]
# 或者: from qgis.core.QgsCategorizedSymbolRenderer import filter [as 别名]
def testFilter(self):
"""Test filter creation"""
renderer = QgsCategorizedSymbolRenderer()
renderer.setClassAttribute('field')
renderer.addCategory(QgsRendererCategory('a', createMarkerSymbol(), 'a'))
renderer.addCategory(QgsRendererCategory('b', createMarkerSymbol(), 'b'))
renderer.addCategory(QgsRendererCategory('c', createMarkerSymbol(), 'c'))
# add default category
renderer.addCategory(QgsRendererCategory('', createMarkerSymbol(), 'default'))
fields = QgsFields()
fields.append(QgsField('field', QVariant.String))
fields.append(QgsField('num', QVariant.Double))
self.assertEqual(renderer.filter(fields), '')
# remove categories, leaving default
assert renderer.updateCategoryRenderState(0, False)
self.assertEqual(renderer.filter(fields), "(\"field\") NOT IN ('a') OR (\"field\") IS NULL")
assert renderer.updateCategoryRenderState(1, False)
self.assertEqual(renderer.filter(fields), "(\"field\") NOT IN ('a','b') OR (\"field\") IS NULL")
assert renderer.updateCategoryRenderState(2, False)
self.assertEqual(renderer.filter(fields), "(\"field\") NOT IN ('a','b','c') OR (\"field\") IS NULL")
# remove default category
assert renderer.updateCategoryRenderState(3, False)
self.assertEqual(renderer.filter(fields), "FALSE")
# add back other categories, leaving default disabled
assert renderer.updateCategoryRenderState(0, True)
self.assertEqual(renderer.filter(fields), "(\"field\") IN ('a')")
assert renderer.updateCategoryRenderState(1, True)
self.assertEqual(renderer.filter(fields), "(\"field\") IN ('a','b')")
assert renderer.updateCategoryRenderState(2, True)
self.assertEqual(renderer.filter(fields), "(\"field\") IN ('a','b','c')")
renderer.deleteAllCategories()
# just default category
renderer.addCategory(QgsRendererCategory('', createMarkerSymbol(), 'default'))
self.assertEqual(renderer.filter(fields), '')
assert renderer.updateCategoryRenderState(0, False)
self.assertEqual(renderer.filter(fields), 'FALSE')
renderer.deleteAllCategories()
# no default category
renderer.addCategory(QgsRendererCategory('a', createMarkerSymbol(), 'a'))
renderer.addCategory(QgsRendererCategory('b', createMarkerSymbol(), 'b'))
renderer.addCategory(QgsRendererCategory('c', createMarkerSymbol(), 'c'))
self.assertEqual(renderer.filter(fields), "(\"field\") IN ('a','b','c')")
assert renderer.updateCategoryRenderState(0, False)
self.assertEqual(renderer.filter(fields), "(\"field\") IN ('b','c')")
assert renderer.updateCategoryRenderState(2, False)
self.assertEqual(renderer.filter(fields), "(\"field\") IN ('b')")
assert renderer.updateCategoryRenderState(1, False)
self.assertEqual(renderer.filter(fields), "FALSE")
renderer.deleteAllCategories()
renderer.setClassAttribute('num')
# numeric categories
renderer.addCategory(QgsRendererCategory(1, createMarkerSymbol(), 'a'))
renderer.addCategory(QgsRendererCategory(2, createMarkerSymbol(), 'b'))
renderer.addCategory(QgsRendererCategory(3, createMarkerSymbol(), 'c'))
self.assertEqual(renderer.filter(fields), '(\"num\") IN (1,2,3)')
assert renderer.updateCategoryRenderState(0, False)
self.assertEqual(renderer.filter(fields), "(\"num\") IN (2,3)")
assert renderer.updateCategoryRenderState(2, False)
self.assertEqual(renderer.filter(fields), "(\"num\") IN (2)")
assert renderer.updateCategoryRenderState(1, False)
self.assertEqual(renderer.filter(fields), "FALSE")
示例2: testFilterExpression
# 需要导入模块: from qgis.core import QgsCategorizedSymbolRenderer [as 别名]
# 或者: from qgis.core.QgsCategorizedSymbolRenderer import filter [as 别名]
def testFilterExpression(self):
"""Test filter creation with expression"""
renderer = QgsCategorizedSymbolRenderer()
renderer.setClassAttribute("field + field2")
renderer.addCategory(QgsRendererCategory("a", createMarkerSymbol(), "a"))
renderer.addCategory(QgsRendererCategory("b", createMarkerSymbol(), "b"))
renderer.addCategory(QgsRendererCategory("c", createMarkerSymbol(), "c"))
# add default category
renderer.addCategory(QgsRendererCategory("", createMarkerSymbol(), "default"))
fields = QgsFields()
fields.append(QgsField("field", QVariant.String))
self.assertEqual(renderer.filter(fields), "")
# remove categories, leaving default
assert renderer.updateCategoryRenderState(0, False)
self.assertEqual(renderer.filter(fields), "(field + field2) NOT IN ('a') OR (field + field2) IS NULL")
assert renderer.updateCategoryRenderState(1, False)
self.assertEqual(renderer.filter(fields), "(field + field2) NOT IN ('a','b') OR (field + field2) IS NULL")
assert renderer.updateCategoryRenderState(2, False)
self.assertEqual(renderer.filter(fields), "(field + field2) NOT IN ('a','b','c') OR (field + field2) IS NULL")
# remove default category
assert renderer.updateCategoryRenderState(3, False)
self.assertEqual(renderer.filter(fields), "FALSE")
# add back other categories, leaving default disabled
assert renderer.updateCategoryRenderState(0, True)
self.assertEqual(renderer.filter(fields), "(field + field2) IN ('a')")
assert renderer.updateCategoryRenderState(1, True)
self.assertEqual(renderer.filter(fields), "(field + field2) IN ('a','b')")
assert renderer.updateCategoryRenderState(2, True)
self.assertEqual(renderer.filter(fields), "(field + field2) IN ('a','b','c')")
renderer.deleteAllCategories()
# just default category
renderer.addCategory(QgsRendererCategory("", createMarkerSymbol(), "default"))
self.assertEqual(renderer.filter(fields), "")
assert renderer.updateCategoryRenderState(0, False)
self.assertEqual(renderer.filter(fields), "FALSE")
renderer.deleteAllCategories()
# no default category
renderer.addCategory(QgsRendererCategory("a", createMarkerSymbol(), "a"))
renderer.addCategory(QgsRendererCategory("b", createMarkerSymbol(), "b"))
renderer.addCategory(QgsRendererCategory("c", createMarkerSymbol(), "c"))
self.assertEqual(renderer.filter(fields), "(field + field2) IN ('a','b','c')")
assert renderer.updateCategoryRenderState(0, False)
self.assertEqual(renderer.filter(fields), "(field + field2) IN ('b','c')")
assert renderer.updateCategoryRenderState(2, False)
self.assertEqual(renderer.filter(fields), "(field + field2) IN ('b')")
assert renderer.updateCategoryRenderState(1, False)
self.assertEqual(renderer.filter(fields), "FALSE")
renderer.deleteAllCategories()
# numeric categories
renderer.addCategory(QgsRendererCategory(1, createMarkerSymbol(), "a"))
renderer.addCategory(QgsRendererCategory(2, createMarkerSymbol(), "b"))
renderer.addCategory(QgsRendererCategory(3, createMarkerSymbol(), "c"))
self.assertEqual(renderer.filter(fields), "(field + field2) IN (1,2,3)")
assert renderer.updateCategoryRenderState(0, False)
self.assertEqual(renderer.filter(fields), "(field + field2) IN (2,3)")
assert renderer.updateCategoryRenderState(2, False)
self.assertEqual(renderer.filter(fields), "(field + field2) IN (2)")
assert renderer.updateCategoryRenderState(1, False)
self.assertEqual(renderer.filter(fields), "FALSE")