def __init__(self, stream, interleaved=False):
""" stream: an iterable, returning tuples of the form (id,[xmin,xmax,ymin,ymax],object)
for now, requires that xmin==xmax, and ymin==ymax
For now, only interleaved=False is supported.
"""
it = iter(stream)
self.qsi = qc.QgsSpatialIndex()
if interleaved:
raise Exception, "No support for interleaved index. You must use xxyy ordering"
for feat_id, rect_xxyy, obj in it:
self.insert(feat_id, rect=rect_xxyy)
def nearest_neighbor(iface, layer, point):
"""search the nearest parent feature id"""
index = None
parentId = None
parentFeature = None
extent = iface.mapCanvas().extent()
# veroorzaakt foutmelding als er niets in het kaartvenster staat, daarom in try/except statement
index = QC.QgsSpatialIndex(layer.getFeatures(QC.QgsFeatureRequest(extent)))
try:
parentId = index.nearestNeighbor(point, 1)[0]
parentFeature = next(layer.getFeatures(QC.QgsFeatureRequest(parentId)))
parentId = parentFeature["id"]
except: # pylint: disable=bare-except
pass
return parentFeature, parentId
def updateSpatialIndex(self):
if self.enableInfoLayerCheckbox.isChecked():
self.infoIndex = core.QgsSpatialIndex ()
self.progressBar.show()
self.progressBar.setRange(0,self.getInfolayer().featureCount ())
infoFeats = self.getInfolayer().getFeatures()
processed = 0
for feat in infoFeats:
self.infoIndex.insertFeature(feat)
self.progressBar.setValue(processed)
processed += 1
self.progressBar.hide()
self.progressBar.reset()
else:
self.infoIndex = None