本文整理汇总了Python中qgis.core.QgsGraduatedSymbolRenderer.classAttribute方法的典型用法代码示例。如果您正苦于以下问题：Python QgsGraduatedSymbolRenderer.classAttribute方法的具体用法？Python QgsGraduatedSymbolRenderer.classAttribute怎么用？Python QgsGraduatedSymbolRenderer.classAttribute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.QgsGraduatedSymbolRenderer的用法示例。
在下文中一共展示了QgsGraduatedSymbolRenderer.classAttribute方法的3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: testQgsGraduatedSymbolRenderer_1
# 需要导入模块: from qgis.core import QgsGraduatedSymbolRenderer [as 别名]
# 或者: from qgis.core.QgsGraduatedSymbolRenderer import classAttribute [as 别名]
def testQgsGraduatedSymbolRenderer_1(self):
"""Test QgsGraduatedSymbolRenderer: Basic get/set functions """
# Create a renderer
renderer = QgsGraduatedSymbolRenderer()
symbol = createMarkerSymbol()
renderer.setSourceSymbol(symbol.clone())
self.assertEqual(symbol.dump(), renderer.sourceSymbol().dump(), "Get/set renderer source symbol")
attr = '"value"*"value"'
renderer.setClassAttribute(attr)
self.assertEqual(attr, renderer.classAttribute(), "Get/set renderer class attribute")
for m in (
QgsGraduatedSymbolRenderer.Custom,
QgsGraduatedSymbolRenderer.EqualInterval,
QgsGraduatedSymbolRenderer.Quantile,
QgsGraduatedSymbolRenderer.Jenks,
QgsGraduatedSymbolRenderer.Pretty,
QgsGraduatedSymbolRenderer.StdDev,
):
renderer.setMode(m)
self.assertEqual(m, renderer.mode(), "Get/set renderer mode")
format = createLabelFormat()
renderer.setLabelFormat(format)
self.assertEqual(
dumpLabelFormat(format),
dumpLabelFormat(renderer.labelFormat()),
"Get/set renderer label format")
ramp = createColorRamp()
renderer.setSourceColorRamp(ramp)
self.assertEqual(
dumpColorRamp(ramp),
dumpColorRamp(renderer.sourceColorRamp()),
"Get/set renderer color ramp")
renderer.setSourceColorRamp(ramp)
self.assertEqual(
dumpColorRamp(ramp),
dumpColorRamp(renderer.sourceColorRamp()),
"Get/set renderer color ramp")
# test for classificatio with varying size
renderer.setGraduatedMethod(QgsGraduatedSymbolRenderer.GraduatedSize)
renderer.setSourceColorRamp(None)
renderer.addClassLowerUpper(0, 2)
renderer.addClassLowerUpper(2, 4)
renderer.addClassLowerUpper(4, 6)
renderer.setSymbolSizes(2, 13)
self.assertEqual(renderer.maxSymbolSize(), 13)
self.assertEqual(renderer.minSymbolSize(), 2)
refSizes = [2, (13 + 2) * .5, 13]
ctx = QgsRenderContext()
for idx, symbol in enumerate(renderer.symbols(ctx)):
self.assertEqual(symbol.size(), refSizes[idx])示例2: testQgsGraduatedSymbolRenderer_3
# 需要导入模块: from qgis.core import QgsGraduatedSymbolRenderer [as 别名]
# 或者: from qgis.core.QgsGraduatedSymbolRenderer import classAttribute [as 别名]
def testQgsGraduatedSymbolRenderer_3(self):
"""Test QgsGraduatedSymbolRenderer: Reading attribute data, calculating classes """
# Create a renderer
renderer = QgsGraduatedSymbolRenderer()
symbol = createMarkerSymbol()
renderer.setSourceSymbol(symbol.clone())
# Test retrieving data values from a layer
ml = createMemoryLayer((1.2, 0.5, 5.0, 1.0, 1.0, 1.2))
# ... by attribute
renderer.setClassAttribute("value")
self.assertEqual(renderer.classAttribute(), "value", "Error in set/get classAttribute")
data = renderer.getDataValues(ml)
datastr = ':'.join([str(x) for x in data])
self.assertEqual(datastr, '1.2:0.5:5.0:1.0:1.0:1.2', "Error returning field data")
# ... by expression
renderer.setClassAttribute('"value"*"value"')
self.assertEqual(renderer.classAttribute(), '"value"*"value"', "Error in set/get classAttribute")
data = renderer.getDataValues(ml)
datastr = ':'.join([str(x) for x in data])
self.assertEqual(datastr, '1.44:0.25:25.0:1.0:1.0:1.44', "Error returning field expression")
renderer.setClassAttribute("value")
# Equal interval calculations
renderer.updateClasses(ml, renderer.EqualInterval, 3)
self.assertEqual(
dumpRangeBreaks(renderer.ranges()),
'(0.5000-2.0000,2.0000-3.5000,3.5000-5.0000,)',
'Equal interval classification not correct')
# Quantile classes
renderer.updateClasses(ml, renderer.Quantile, 3)
self.assertEqual(
dumpRangeBreaks(renderer.ranges()),
'(0.5000-1.0000,1.0000-1.2000,1.2000-5.0000,)',
'Quantile classification not correct')
renderer.updateClasses(ml, renderer.Quantile, 4)
self.assertEqual(
dumpRangeBreaks(renderer.ranges()),
'(0.5000-1.0000,1.0000-1.1000,1.1000-1.2000,1.2000-5.0000,)',
'Quantile classification not correct')示例3: testQgsGraduatedSymbolRenderer_1
# 需要导入模块: from qgis.core import QgsGraduatedSymbolRenderer [as 别名]
# 或者: from qgis.core.QgsGraduatedSymbolRenderer import classAttribute [as 别名]
def testQgsGraduatedSymbolRenderer_1(self):
"""Test QgsGraduatedSymbolRenderer: Basic get/set functions """
# Create a renderer
renderer = QgsGraduatedSymbolRenderer()
symbol = createMarkerSymbol()
renderer.setSourceSymbol(symbol.clone())
self.assertEqual(symbol.dump(), renderer.sourceSymbol().dump(), "Get/set renderer source symbol")
attr = '"value"*"value"'
renderer.setClassAttribute(attr)
self.assertEqual(attr, renderer.classAttribute(), "Get/set renderer class attribute")
for m in (
QgsGraduatedSymbolRenderer.Custom,
QgsGraduatedSymbolRenderer.EqualInterval,
QgsGraduatedSymbolRenderer.Quantile,
QgsGraduatedSymbolRenderer.Jenks,
QgsGraduatedSymbolRenderer.Pretty,
QgsGraduatedSymbolRenderer.StdDev,
):
renderer.setMode(m)
self.assertEqual(m, renderer.mode(), "Get/set renderer mode")
format = createLabelFormat()
renderer.setLabelFormat(format)
self.assertEqual(
dumpLabelFormat(format),
dumpLabelFormat(renderer.labelFormat()),
"Get/set renderer label format")
ramp = createColorRamp()
renderer.setSourceColorRamp(ramp)
self.assertEqual(
dumpColorRamp(ramp),
dumpColorRamp(renderer.sourceColorRamp()),
"Get/set renderer color ramp")
renderer.setInvertedColorRamp(True)
self.assertTrue(renderer.invertedColorRamp(),
"Get/set renderer inverted color ramp")
renderer.setInvertedColorRamp(False)
self.assertFalse(renderer.invertedColorRamp(),
"Get/set renderer inverted color ramp")
value = '"value"*2'
exp = QgsSymbolLayerUtils.fieldOrExpressionToExpression(value)
valuestr = QgsSymbolLayerUtils.fieldOrExpressionFromExpression(exp)
renderer.setRotationField(value)
self.assertEqual(valuestr, renderer.rotationField(),
"Get/set renderer rotation field")
value = '"value"*3'
exp = QgsSymbolLayerUtils.fieldOrExpressionToExpression(value)
valuestr = QgsSymbolLayerUtils.fieldOrExpressionFromExpression(exp)
renderer.setSizeScaleField(value)
self.assertEqual(valuestr, renderer.sizeScaleField(),
"Get/set renderer size scale field")
renderer.setSourceColorRamp(ramp)
self.assertEqual(
dumpColorRamp(ramp),
dumpColorRamp(renderer.sourceColorRamp()),
"Get/set renderer color ramp")
for sm in (
QgsSymbol.ScaleArea,
QgsSymbol.ScaleDiameter,
):
renderer.setScaleMethod(sm)
self.assertEqual(str(sm), str(renderer.scaleMethod()),
"Get/set renderer scale method")
# test for classificatio with varying size
renderer.setGraduatedMethod(QgsGraduatedSymbolRenderer.GraduatedSize)
renderer.setSourceColorRamp(None)
renderer.addClassLowerUpper(0, 2)
renderer.addClassLowerUpper(2, 4)
renderer.addClassLowerUpper(4, 6)
renderer.setSymbolSizes(2, 13)
self.assertEqual(renderer.maxSymbolSize(), 13)
self.assertEqual(renderer.minSymbolSize(), 2)
refSizes = [2, (13 + 2) * .5, 13]
ctx = QgsRenderContext()
for idx, symbol in enumerate(renderer.symbols2(ctx)):
self.assertEqual(symbol.size(), refSizes[idx])