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Python QgsSnappingUtils.setLayers方法代码示例

本文整理汇总了Python中qgis.core.QgsSnappingUtils.setLayers方法的典型用法代码示例。如果您正苦于以下问题：Python QgsSnappingUtils.setLayers方法的具体用法？Python QgsSnappingUtils.setLayers怎么用？Python QgsSnappingUtils.setLayers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.QgsSnappingUtils的用法示例。


在下文中一共展示了QgsSnappingUtils.setLayers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: test_signalConnection

# 需要导入模块: from qgis.core import QgsSnappingUtils [as 别名]
# 或者: from qgis.core.QgsSnappingUtils import setLayers [as 别名]
    def test_signalConnection(self):
        # remove all layers
        QgsMapLayerRegistry.instance().removeAllMapLayers()
        # set dependencies and add back layers
        self.pointsLayer = QgsVectorLayer("dbname='%s' table=\"node\" (geom) sql=" % self.fn, "points", "spatialite")
        assert (self.pointsLayer.isValid())
        self.linesLayer = QgsVectorLayer("dbname='%s' table=\"section\" (geom) sql=" % self.fn, "lines", "spatialite")
        assert (self.linesLayer.isValid())
        self.pointsLayer2 = QgsVectorLayer("dbname='%s' table=\"node2\" (geom) sql=" % self.fn, "_points2", "spatialite")
        assert (self.pointsLayer2.isValid())
        self.pointsLayer.setDependencies([QgsMapLayerDependency(self.linesLayer.id())])
        self.pointsLayer2.setDependencies([QgsMapLayerDependency(self.pointsLayer.id())])
        # this should update connections between layers
        QgsMapLayerRegistry.instance().addMapLayers([self.pointsLayer])
        QgsMapLayerRegistry.instance().addMapLayers([self.linesLayer])
        QgsMapLayerRegistry.instance().addMapLayers([self.pointsLayer2])

        ms = QgsMapSettings()
        ms.setOutputSize(QSize(100, 100))
        ms.setExtent(QgsRectangle(0, 0, 1, 1))
        self.assertTrue(ms.hasValidSettings())

        u = QgsSnappingUtils()
        u.setMapSettings(ms)
        u.setSnapToMapMode(QgsSnappingUtils.SnapAdvanced)
        layers = [QgsSnappingUtils.LayerConfig(self.pointsLayer, QgsPointLocator.Vertex, 20, QgsTolerance.Pixels),
                  QgsSnappingUtils.LayerConfig(self.pointsLayer2, QgsPointLocator.Vertex, 20, QgsTolerance.Pixels)
                  ]
        u.setLayers(layers)
        # add another line
        f = QgsFeature(self.linesLayer.fields())
        f.setFeatureId(4)
        geom = QgsGeometry.fromWkt("LINESTRING(0.5 0.2,0.6 0)")
        f.setGeometry(geom)
        self.linesLayer.startEditing()
        self.linesLayer.addFeatures([f])
        self.linesLayer.commitChanges()
        # check the second snapped point is ok
        m = u.snapToMap(QPoint(75, 100 - 0))
        self.assertTrue(m.isValid())
        self.assertTrue(m.hasVertex())
        self.assertEqual(m.point(), QgsPoint(0.8, 0.0))

        self.pointsLayer.setDependencies([])
        self.pointsLayer2.setDependencies([])
开发者ID:fritsvanveen，项目名称:QGIS，代码行数:47，代码来源:test_layer_dependencies.py

示例2: processAlgorithm

# 需要导入模块: from qgis.core import QgsSnappingUtils [as 别名]
# 或者: from qgis.core.QgsSnappingUtils import setLayers [as 别名]
    def processAlgorithm(self, progress):
        points_layer = self.getParameterValue(self.POINTS)
        points_layer = getObjectFromUri(points_layer)

        add_attribute = self.getParameterValue(self.SNAPPED)

        fields = points_layer.dataProvider().fields()

        if add_attribute:
            fields.append(QgsField('snapped', QVariant.String))

        writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
            fields,
            QGis.WKBPoint,
            points_layer.crs())

        snapper = QgsSnappingUtils()


        snapping_type = QgsSnapper.SnapToSegment
        tolerance = 1
        unit = QgsTolerance.LayerUnits
        layer_config = QgsSnappingUtils.LayerConfig(layer_edge, snapping_type, tolerance, unit)
        snapper.setLayers([layer_config])
        snap_mode = QgsSnappingUtils.SnapAdvanced
        snapper.setSnapToMapMode(snap_mode)

        for feature in vector.features(points_layer):
            f = QgsFeature()
            attributes = feature.attributes()
            result = snapper.snapToMap(feature.geometry().asPoint())
            if result.type() == 2:
                f.setGeometry(QgsGeometry.fromPoint(result.point()))
                if add_attribute:
                    attributes.append('True')
            else:
                f.setGeometry(feature.geometry())
                if add_attribute:
                    attributes.append('False')
            f.setAttributes(attributes)
            writer.addFeature(f)
        del writer
开发者ID:Gustry，项目名称:Routing，代码行数:44，代码来源:SnapPoints.py

示例3: QgsSnappingUtils

# 需要导入模块: from qgis.core import QgsSnappingUtils [as 别名]
# 或者: from qgis.core.QgsSnappingUtils import setLayers [as 别名]
from qgis.core import QgsSnappingUtils
snapper = QgsSnappingUtils()

layer_edge = QgsMapLayerRegistry.instance().mapLayersByName('edges')[0]
snapping_type = QgsSnapper.SnapToSegment
tolerance = 1
unit = QgsTolerance.LayerUnits
layer_config = QgsSnappingUtils.LayerConfig(layer_edge, snapping_type, tolerance, unit)
snapper.setLayers([layer_config])
snap_mode = QgsSnappingUtils.SnapAdvanced
snapper.setSnapToMapMode(snap_mode)

p1 = QgsPoint(20.4529554239886, -34.0188548283715)
r = snapper.snapToMap(p1)
print r.type()

#snapper=QgsSnapper(iface.mapCanvas().mapSettings())
#snapper = setSnapMode
开发者ID:Gustry，项目名称:Routing，代码行数:20，代码来源:snap.py

示例4: test_resetSnappingIndex

# 需要导入模块: from qgis.core import QgsSnappingUtils [as 别名]
# 或者: from qgis.core.QgsSnappingUtils import setLayers [as 别名]
    def test_resetSnappingIndex(self):
        self.pointsLayer.setDependencies([])
        self.linesLayer.setDependencies([])
        self.pointsLayer2.setDependencies([])

        ms = QgsMapSettings()
        ms.setOutputSize(QSize(100, 100))
        ms.setExtent(QgsRectangle(0, 0, 1, 1))
        self.assertTrue(ms.hasValidSettings())

        u = QgsSnappingUtils()
        u.setMapSettings(ms)
        u.setSnapToMapMode(QgsSnappingUtils.SnapAdvanced)
        layers = [QgsSnappingUtils.LayerConfig(self.pointsLayer, QgsPointLocator.Vertex, 20, QgsTolerance.Pixels)]
        u.setLayers(layers)

        m = u.snapToMap(QPoint(95, 100))
        self.assertTrue(m.isValid())
        self.assertTrue(m.hasVertex())
        self.assertEqual(m.point(), QgsPoint(1, 0))

        f = QgsFeature(self.linesLayer.fields())
        f.setFeatureId(1)
        geom = QgsGeometry.fromWkt("LINESTRING(0 0,1 1)")
        f.setGeometry(geom)
        self.linesLayer.startEditing()
        self.linesLayer.addFeatures([f])
        self.linesLayer.commitChanges()

        l1 = len([f for f in self.pointsLayer.getFeatures()])
        self.assertEqual(l1, 4)
        m = u.snapToMap(QPoint(95, 0))
        # snapping not updated
        self.pointsLayer.setDependencies([])
        self.assertEqual(m.isValid(), False)

        # set layer dependencies
        self.pointsLayer.setDependencies([QgsMapLayerDependency(self.linesLayer.id())])
        # add another line
        f = QgsFeature(self.linesLayer.fields())
        f.setFeatureId(2)
        geom = QgsGeometry.fromWkt("LINESTRING(0 0,0.5 0.5)")
        f.setGeometry(geom)
        self.linesLayer.startEditing()
        self.linesLayer.addFeatures([f])
        self.linesLayer.commitChanges()
        # check the snapped point is ok
        m = u.snapToMap(QPoint(45, 50))
        self.assertTrue(m.isValid())
        self.assertTrue(m.hasVertex())
        self.assertEqual(m.point(), QgsPoint(0.5, 0.5))
        self.pointsLayer.setDependencies([])

        # test chained layer dependencies A -> B -> C
        layers = [QgsSnappingUtils.LayerConfig(self.pointsLayer, QgsPointLocator.Vertex, 20, QgsTolerance.Pixels),
                  QgsSnappingUtils.LayerConfig(self.pointsLayer2, QgsPointLocator.Vertex, 20, QgsTolerance.Pixels)
                  ]
        u.setLayers(layers)
        self.pointsLayer.setDependencies([QgsMapLayerDependency(self.linesLayer.id())])
        self.pointsLayer2.setDependencies([QgsMapLayerDependency(self.pointsLayer.id())])
        # add another line
        f = QgsFeature(self.linesLayer.fields())
        f.setFeatureId(3)
        geom = QgsGeometry.fromWkt("LINESTRING(0 0.2,0.5 0.8)")
        f.setGeometry(geom)
        self.linesLayer.startEditing()
        self.linesLayer.addFeatures([f])
        self.linesLayer.commitChanges()
        # check the second snapped point is ok
        m = u.snapToMap(QPoint(75, 100 - 80))
        self.assertTrue(m.isValid())
        self.assertTrue(m.hasVertex())
        self.assertEqual(m.point(), QgsPoint(0.7, 0.8))
        self.pointsLayer.setDependencies([])
        self.pointsLayer2.setDependencies([])
开发者ID:fritsvanveen，项目名称:QGIS，代码行数:77，代码来源:test_layer_dependencies.py


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