Class: QgsVectorLayerXyPlotDataGatherer

An vector layer plot data gatherer class for XY series.

Added in version 4.0.

Class Hierarchy

Base classes

QgsVectorLayerAbstractPlotDataGatherer	An abstract vector layer plot data gatherer base class.
QgsTask	Abstract base class for long running background tasks.
QObject

Methods

setPredefinedCategories	Sets the predefined categories list that will be used to restrict the categories used when gathering the data.
setSeriesDetails	Sets the series details list that will be used to prepare the data being gathered.

class qgis.core.QgsVectorLayerXyPlotDataGatherer

Bases: QgsVectorLayerAbstractPlotDataGatherer

__init__(xAxisType: Qgis.PlotAxisType = Qgis.PlotAxisType.Interval)

The vector layer XY plot data gatherer constructor.

Parameters:

xAxisType (Qgis.PlotAxisType = Qgis.PlotAxisType.Interval) – The X-axis type that will define what type of X values to gather.

class XySeriesDetails

Bases: object

XY series details

filterExpression

xExpression

yExpression

setPredefinedCategories(self, categories: Iterable[str | None])

Sets the predefined categories list that will be used to restrict the categories used when gathering the data.

Note

This is only used when the gatherer’s X-axis type is set to categorical.

Parameters:

categories (Iterable[Optional[str]])

setSeriesDetails(self, details: Iterable[QgsVectorLayerXyPlotDataGatherer.XySeriesDetails])

Sets the series details list that will be used to prepare the data being gathered.

Parameters:

details (Iterable[QgsVectorLayerXyPlotDataGatherer.XySeriesDetails])