本文整理汇总了Python中qgis.core.QgsPalLayerSettings.setDataDefinedProperty方法的典型用法代码示例。如果您正苦于以下问题：Python QgsPalLayerSettings.setDataDefinedProperty方法的具体用法？Python QgsPalLayerSettings.setDataDefinedProperty怎么用？Python QgsPalLayerSettings.setDataDefinedProperty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.QgsPalLayerSettings的用法示例。
在下文中一共展示了QgsPalLayerSettings.setDataDefinedProperty方法的2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: prepare_ordered_marker
# 需要导入模块: from qgis.core import QgsPalLayerSettings [as 别名]
# 或者: from qgis.core.QgsPalLayerSettings import setDataDefinedProperty [as 别名]
def prepare_ordered_marker(self, coords, idx):
"""
Try to display nice marker on a point layer, showing the order of
the path computed by OSRM.
"""
self.tsp_marker_lr = QgsVectorLayer(
"Point?crs=epsg:4326&field=id:integer"
"&field=TSP_nb:integer(20)&field=Origin_nb:integer(20)",
"tsp_markers_osrm{}".format(self.nb_route), "memory")
symbol = QgsSymbolV2.defaultSymbol(self.tsp_marker_lr.geometryType())
symbol.setSize(4.5)
symbol.setColor(QtGui.QColor("yellow"))
ordered_pts = \
[coords[i["waypoint_index"]] for i in self.parsed['waypoints']]
print("ordered_pts : ", ordered_pts)
features = []
for nb, pt in enumerate(ordered_pts):
ft = QgsFeature()
ft.setGeometry(QgsGeometry.fromPoint(QgsPoint(pt)))
ft.setAttributes([nb, nb + 1, coords.index(pt)])
features.append(ft)
self.tsp_marker_lr.dataProvider().addFeatures(features)
pal_lyr = QgsPalLayerSettings()
pal_lyr.readFromLayer(self.tsp_marker_lr)
pal_lyr.enabled = True
pal_lyr.fieldName = 'TSP_nb'
pal_lyr.placement= QgsPalLayerSettings.OverPoint
pal_lyr.setDataDefinedProperty(QgsPalLayerSettings.Size,True,True,'12','')
pal_lyr.writeToLayer(self.tsp_marker_lr)
self.tsp_marker_lr.setRendererV2(QgsSingleSymbolRendererV2(symbol))
QgsMapLayerRegistry.instance().addMapLayer(self.tsp_marker_lr)示例2: extract_layers
# 需要导入模块: from qgis.core import QgsPalLayerSettings [as 别名]
# 或者: from qgis.core.QgsPalLayerSettings import setDataDefinedProperty [as 别名]
#.........这里部分代码省略.........
# Add features from xml tree..
# ..to vertex layer..
fts_vertex = []
for e in tree.findall(r"sommet"):
ft_vertex = QgsFeature()
ft_vertex.setGeometry(QgsGeometry.fromWkt(e.attrib[r"geometrie"]))
_id_noeud = int(e.attrib[r"id_noeud"])
# _changeset = int(e.attrib[r"changeset"])
# _timestamp = QDateTime(datetime.strptime(
# e.attrib[r"timestamp"], r"%Y-%m-%d %H:%M:%S.%f"))
_version = int(e.attrib[r"version"])
som_ge_createur = unicode(e.find(r"./som_ge_createur").text)
som_nature = unicode(e.find(r"./som_nature").text)
som_prec_rattcht = int(e.find(r"./som_precision_rattachement").text)
som_coord_est = float(e.find(r"./som_coord_est").text)
som_coord_nord = float(e.find(r"./som_coord_nord").text)
som_repres_plane = unicode(e.find(r"./som_representation_plane").text)
# som_date_creation = QDate(datetime.strptime(
# e.find(r"./som_date_creation").text, r"%Y-%m-%d").date())
ft_vertex.setAttributes([
_id_noeud,
# _changeset,
# _timestamp,
_version,
som_ge_createur,
som_nature,
som_prec_rattcht,
som_coord_est,
som_coord_nord,
som_repres_plane,
# som_date_creation
])
fts_vertex.append(ft_vertex)
# ..to edge layer..
fts_edge = []
for e in tree.findall(r"limite"):
ft_edge = QgsFeature()
ft_edge.setGeometry(QgsGeometry.fromWkt(e.attrib[r"geometrie"]))
_id_arc = int(e.attrib[r"id_arc"])
# _id_noeud_debut = int(e.attrib[r"id_noeud_debut"])
# _id_noeud_fin = int(e.attrib[r"id_noeud_fin"])
# _changeset = int(e.attrib[r"changeset"])
# _timestamp = QDateTime(datetime.strptime(
# e.attrib[r"timestamp"], r"%Y-%m-%d %H:%M:%S.%f"))
_version = int(e.attrib[r"version"])
lim_ge_createur = unicode(e.find(r"./lim_ge_createur").text)
# lim_date_creation = QDate(datetime.strptime(
# e.find(r"./lim_date_creation").text, r"%Y-%m-%d").date())
ft_edge.setAttributes([
_id_arc,
# _id_noeud_debut,
# _id_noeud_fin,
# _changeset,
# _timestamp,
_version,
lim_ge_createur,
# lim_date_creation
])
fts_edge.append(ft_edge)
# Add features to layers..
p_vertex.addFeatures(fts_vertex)
p_edge.addFeatures(fts_edge)
# Update fields..
l_vertex.updateFields()
l_edge.updateFields()
# Update layer's extent..
l_vertex.updateExtents()
l_edge.updateExtents()
# Check if valid..
if not l_vertex.isValid() or not l_edge.isValid():
raise Exception(u"Une erreur est survenue lors du chargement de la couche.")
# Set labelling...
palyr = QgsPalLayerSettings()
palyr.enabled = True
# palyr.readFromLayer(l_vertex)
palyr.fieldName = r"$id" # Expression $id
palyr.placement = 1 # ::OverPoint
palyr.quadOffset = 2 # ::QuadrantAboveRight
palyr.setDataDefinedProperty(80, True, True, r"1", "") # ::OffsetUnits -> ::MM
palyr.xOffset = 2.0
palyr.yOffset = -1.0
palyr.writeToLayer(l_vertex)
# Then return layers..
return [l_vertex, l_edge]