Python core.QgsGraduatedSymbolRenderer类代码示例

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本文整理汇总了Python中qgis.core.QgsGraduatedSymbolRenderer类的典型用法代码示例。如果您正苦于以下问题：Python QgsGraduatedSymbolRenderer类的具体用法？Python QgsGraduatedSymbolRenderer怎么用？Python QgsGraduatedSymbolRenderer使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了QgsGraduatedSymbolRenderer类的7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，您的评价将有助于我们的系统推荐出更棒的Python代码示例。

示例1: testFilterNeedsGeometry

    def testFilterNeedsGeometry(self):
        renderer = QgsGraduatedSymbolRenderer()

        renderer.setClassAttribute("value")
        self.assertFalse(renderer.filterNeedsGeometry())
        renderer.setClassAttribute("$area")
        self.assertTrue(renderer.filterNeedsGeometry())
        renderer.setClassAttribute("value - $area")
        self.assertTrue(renderer.filterNeedsGeometry())

开发者ID:jonnyforestGIS，项目名称:QGIS，代码行数:9，代码来源:test_qgsgraduatedsymbolrenderer.py

示例2: testUsedAttributes

    def testUsedAttributes(self):
        renderer = QgsGraduatedSymbolRenderer()
        ctx = QgsRenderContext()

        # attribute can contain either attribute name or an expression.
        # Sometimes it is not possible to distinguish between those two,
        # e.g. "a - b" can be both a valid attribute name or expression.
        # Since we do not have access to fields here, the method should return both options.
        renderer.setClassAttribute("value")
        self.assertEqual(renderer.usedAttributes(ctx), {"value"})
        renderer.setClassAttribute("value - 1")
        self.assertEqual(renderer.usedAttributes(ctx), {"value", "value - 1"})
        renderer.setClassAttribute("valuea - valueb")
        self.assertEqual(renderer.usedAttributes(ctx), {"valuea", "valuea - valueb", "valueb"})

开发者ID:jonnyforestGIS，项目名称:QGIS，代码行数:14，代码来源:test_qgsgraduatedsymbolrenderer.py

示例3: testQgsGraduatedSymbolRenderer_3

    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))

        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')

开发者ID:NathanW2，项目名称:QGIS，代码行数:30，代码来源:test_qgsgraduatedsymbolrenderer.py

示例4: testQgsGraduatedSymbolRenderer_2

    def testQgsGraduatedSymbolRenderer_2(self):
        """Test QgsGraduatedSymbolRenderer: Adding /removing/editing classes """
        # Create a renderer
        renderer = QgsGraduatedSymbolRenderer()
        symbol = createMarkerSymbol()
        renderer.setSourceSymbol(symbol.clone())
        symbol.setColor(QColor(255, 0, 0))

        # Add class without start and end ranges

        renderer.addClass(symbol.clone())
        renderer.addClass(symbol.clone())
        renderer.updateRangeLabel(1, 'Second range')
        renderer.updateRangeLowerValue(1, 10.0)
        renderer.updateRangeUpperValue(1, 25.0)
        renderer.updateRangeRenderState(1, False)
        symbol.setColor(QColor(0, 0, 255))
        renderer.updateRangeSymbol(1, symbol.clone())

        # Add as a rangeobject
        symbol.setColor(QColor(0, 255, 0))
        range = QgsRendererRange(20.0, 25.5, symbol.clone(), 'Third range', False)
        renderer.addClassRange(range)

        # Add class by lower and upper
        renderer.addClassLowerUpper(25.5, 30.5)
        # (Update label for sorting tests)
        renderer.updateRangeLabel(3, 'Another range')

        self.assertEqual(
            dumpRangeLabels(renderer.ranges()),
            '(0.0 - 0.0,Second range,Third range,Another range,)',
            'Added ranges labels not correct')
        self.assertEqual(
            dumpRangeBreaks(renderer.ranges()),
            '(0.0000-0.0000,10.0000-25.0000,20.0000-25.5000,25.5000-30.5000,)',
            'Added ranges lower/upper values not correct')

        # Check that clone function works

        renderer2 = renderer.clone()
        self.assertEqual(
            dumpGraduatedRenderer(renderer),
            dumpGraduatedRenderer(renderer2),
            "clone function doesn't replicate renderer properly"
        )

        # Check save and reload from Dom works

        doc = QDomDocument()
        element = renderer.save(doc, QgsReadWriteContext())
        renderer2 = QgsGraduatedSymbolRenderer.create(element, QgsReadWriteContext())
        self.assertEqual(
            dumpGraduatedRenderer(renderer),
            dumpGraduatedRenderer(renderer2),
            "Save/create from DOM doesn't replicate renderer properly"
        )

        # Check sorting

        renderer.sortByLabel()
        self.assertEqual(
            dumpRangeList(renderer.ranges(), labelsOnly=True),
            '(0.0 - 0.0,Another range,Second range,Third range,)',
            'sortByLabel not correct')
        renderer.sortByValue()
        self.assertEqual(
            dumpRangeBreaks(renderer.ranges()),
            '(0.0000-0.0000,10.0000-25.0000,20.0000-25.5000,25.5000-30.5000,)',
            'sortByValue not correct')
        renderer.sortByValue(Qt.DescendingOrder)
        self.assertEqual(
            dumpRangeBreaks(renderer.ranges()),
            '(25.5000-30.5000,20.0000-25.5000,10.0000-25.0000,0.0000-0.0000,)',
            'sortByValue descending not correct')

        # Check deleting

        renderer.deleteClass(2)
        self.assertEqual(
            dumpRangeBreaks(renderer.ranges()),
            '(25.5000-30.5000,20.0000-25.5000,0.0000-0.0000,)',
            'deleteClass not correct')

        renderer.deleteAllClasses()
        self.assertEqual(len(renderer.ranges()), 0, "deleteAllClasses didn't delete all")

开发者ID:NathanW2，项目名称:QGIS，代码行数:86，代码来源:test_qgsgraduatedsymbolrenderer.py

示例5: testQgsGraduatedSymbolRenderer_1

    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])

开发者ID:NathanW2，项目名称:QGIS，代码行数:58，代码来源:test_qgsgraduatedsymbolrenderer.py

示例6: testQgsGraduatedSymbolRenderer_3

    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')

开发者ID:V17nika，项目名称:QGIS，代码行数:42，代码来源:test_qgsgraduatedsymbolrenderer.py

示例7: testQgsGraduatedSymbolRenderer_1

    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])

开发者ID:V17nika，项目名称:QGIS，代码行数:86，代码来源:test_qgsgraduatedsymbolrenderer.py

注：本文中的qgis.core.QgsGraduatedSymbolRenderer类示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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Python core.QgsGraduatedSymbolRenderer类代码示例

示例1: testFilterNeedsGeometry

示例2: testUsedAttributes

示例3: testQgsGraduatedSymbolRenderer_3

示例4: testQgsGraduatedSymbolRenderer_2

示例5: testQgsGraduatedSymbolRenderer_1

示例6: testQgsGraduatedSymbolRenderer_3

示例7: testQgsGraduatedSymbolRenderer_1

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