Class: QgsInvertedPolygonRenderer¶

A polygon-only feature renderer used to display features inverted.

The exterior of the polygon is turned to an interior and where the exterior theoretically spans the entire plane, allowing to mask the surroundings of some features.

It is designed on top of another feature renderer, which is called “embedded” Most of the methods are then only proxies to the embedded renderer.

Features are collected to form one “inverted” polygon during renderFeature() and rendered on stopRender().

Class Hierarchy¶

Base classes¶

`QgsMergedFeatureRenderer`	A polygon or line-only feature renderer used to render a set of features merged (or dissolved) into a single geometry.
`QgsFeatureRenderer`	Abstract base class for all 2D vector feature renderers.

Methods

`preprocessingEnabled`	Returns `True` if the geometries are to be preprocessed (merged with an union) before rendering.
`setPreprocessingEnabled`	Sets whether geometries preprocessing is enabled.

Static Methods

convertFromRenderer

Creates a QgsInvertedPolygonRenderer by a conversion from an existing renderer.

class qgis.core.QgsInvertedPolygonRenderer[source]¶

Bases: QgsMergedFeatureRenderer

__init__(embeddedRenderer: QgsFeatureRenderer | None = None)

Constructor

Parameters:: embeddedRenderer (Optional[QgsFeatureRenderer] = None) – optional embeddedRenderer. If None, a default one will be assigned. Ownership will be transferred.

static convertFromRenderer(renderer: QgsFeatureRenderer | None) → QgsInvertedPolygonRenderer | None[source]¶

Creates a QgsInvertedPolygonRenderer by a conversion from an existing renderer.

Return type:: Optional[QgsInvertedPolygonRenderer]
Returns:: a new renderer if the conversion was possible, otherwise None.
Parameters:: renderer (Optional[QgsFeatureRenderer])

preprocessingEnabled(self) → bool[source]¶

Returns True if the geometries are to be preprocessed (merged with an union) before rendering.