Class: QgsVectorLayerDirector

Determine making the graph from vector line layer

Class Hierarchy

Inheritance diagram of qgis.analysis.QgsVectorLayerDirector

Base classes

QgsGraphDirector

Determine making the graph. QgsGraphBuilder and QgsGraphDirector implemented using “builder” design patter.

QObject

Methods

makeGraph

MANDATORY DIRECTOR PROPERTY DECLARATION

Attributes

DirectionBackward

DirectionBoth

DirectionForward

class qgis.analysis.QgsVectorLayerDirector[source]

Bases: QgsGraphDirector

__init__(source: QgsFeatureSource | None, directionFieldId: int, directDirectionValue: str | None, reverseDirectionValue: str | None, bothDirectionValue: str | None, defaultDirection: QgsVectorLayerDirector.Direction)

Default constructor

Parameters:

  • source (Optional[QgsFeatureSource]) – feature source representing network

  • directionFieldId (int) – field containing direction value

  • directDirectionValue (Optional[str]) – value for direct one-way road

  • reverseDirectionValue (Optional[str]) – value for reversed one-way road

  • bothDirectionValue (Optional[str]) – value for two-way (bidirectional) road

  • defaultDirection (QgsVectorLayerDirector.Direction) – default direction. Will be used if corresponding attribute value is not set or does not equal to the given values

class Direction

Bases: int

DirectionBackward = 1
DirectionBoth = 2
DirectionForward = 0
makeGraph(self, builder: QgsGraphBuilderInterface | None, additionalPoints: Iterable[QgsPointXY], feedback: QgsFeedback | None = None) → List[QgsPointXY][source]

MANDATORY DIRECTOR PROPERTY DECLARATION

Parameters:
Return type:

List[QgsPointXY]