Class: QgsGraphBuilder¶

This class used for making the QgsGraph object

Class Hierarchy¶

Base classes¶

QgsGraphBuilderInterface

Determine interface for creating a graph. Contains the settings of the graph. QgsGraphBuilder and QgsGraphDirector both use a “builder” design pattern

Methods

`addVertex`	MANDATORY BUILDER PROPERTY DECLARATION
`graph`	Returns the generated `QgsGraph`.
`takeGraph`	Takes the generated graph from the builder, resetting the builder back to its initial state ready for additional graph construction.

class qgis.analysis.QgsGraphBuilder[source]¶

Bases: QgsGraphBuilderInterface

__init__(crs: QgsCoordinateReferenceSystem, otfEnabled: bool = True, topologyTolerance: float = 0, ellipsoidID: str | None = '')

Default constructor

Parameters:

crs (QgsCoordinateReferenceSystem)
otfEnabled (bool = True)
topologyTolerance (float = 0)
ellipsoidID (Optional[str] = '')

addVertex(self, id: int, pt: QgsPointXY)[source]¶

MANDATORY BUILDER PROPERTY DECLARATION

Parameters:

id (int)
pt (QgsPointXY)

graph(self) → QgsGraph[source]¶

Returns the generated QgsGraph.

The builder is left in its current state.