本文整理汇总了Python中qgis.core.QgsSnappingUtils类的典型用法代码示例。如果您正苦于以下问题：Python QgsSnappingUtils类的具体用法？Python QgsSnappingUtils怎么用？Python QgsSnappingUtils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QgsSnappingUtils类的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，您的评价将有助于我们的系统推荐出更棒的Python代码示例。
示例1: processAlgorithm
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:42，代码来源:SnapPoints.py
示例2: test_resetSnappingIndex
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([])
开发者ID:GrokImageCompression，项目名称:QGIS，代码行数:78，代码来源:test_layer_dependencies.py
示例3: QgsSnappingUtils
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:18，代码来源:snap.py
示例4: QgsSnappingUtils
# coding: utf-8
from qgis.core import QgsSnappingUtils
from qgis.gui import QgsMapCanvasSnappingUtils
from qgis.utils import iface
canvas = iface.mapCanvas()
snapping_utils = QgsSnappingUtils()
print(snapping_utils.snapToMapMode())
# Change the mode through the GUI
print(snapping_utils.snapToMapMode())
# Retrieve information from the project
snapping_utils.readConfigFromProject()
# Alternate way to above code
snapping_utils = canvas.snappingUtils() # TODO: cast QgsMapCanvasSnappingUtils
snapping_utils.defaultSettings()
# Find the mode in a readable way
print([
i for i in ['SnapCurrentLayer', 'SnapAdvanced', 'SnapAllLayers']
if snapping_utils.snapToMapMode() == getattr(QgsSnappingUtils, i)
][0])
print(snapping_utils.layers())
print(snapping_utils.defaultSettings()) # where values are type, tolerance and unit
map_canvas_snapping_utils = QgsMapCanvasSnappingUtils(canvas)
开发者ID:GEO-IASS，项目名称:pyqgis-samples，代码行数:30，代码来源:qgis-sample-QgsMapCanvasSnappingUtils.py
注：本文中的qgis.core.QgsSnappingUtils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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