本文整理汇总了Python中qgis.core.QgsSnappingUtils.snapToMap方法的典型用法代码示例。如果您正苦于以下问题：Python QgsSnappingUtils.snapToMap方法的具体用法？Python QgsSnappingUtils.snapToMap怎么用？Python QgsSnappingUtils.snapToMap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.snapToMap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: processAlgorithm
# 需要导入模块: from qgis.core import QgsSnappingUtils [as 别名]
# 或者: from qgis.core.QgsSnappingUtils import snapToMap [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示例2: test_resetSnappingIndex
# 需要导入模块: from qgis.core import QgsSnappingUtils [as 别名]
# 或者: from qgis.core.QgsSnappingUtils import snapToMap [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)
cfg = u.config()
cfg.setMode(QgsSnappingConfig.AdvancedConfiguration)
cfg.setIndividualLayerSettings(self.pointsLayer,
QgsSnappingConfig.IndividualLayerSettings(True,
QgsSnappingConfig.Vertex, 20, QgsTolerance.Pixels))
u.setConfig(cfg)
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
cfg.setIndividualLayerSettings(self.pointsLayer2,
QgsSnappingConfig.IndividualLayerSettings(True,
QgsSnappingConfig.Vertex, 20, QgsTolerance.Pixels))
u.setConfig(cfg)
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([])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 snapToMap [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