Class: QgsSymbolLayerId¶
- class qgis.core.QgsSymbolLayerId¶
Bases:
sip.wrapper
QgsSymbolLayerId(key: str, index: int)
QgsSymbolLayerId
constructor with a symbol key and a unique symbol layer indexQgsSymbolLayerId(key: str, indexPath: Iterable[int])
QgsSymbolLayerId
constructor with a symbol key and an index pathQgsSymbolLayerId(other:
QgsSymbolLayerId
) Default copy constructorWe may need stable references to symbol layers, when pointers to symbol layers is not usable (when a symbol or a feature renderer is cloned for example).
A symbol layer identifier consists of:
an identifier to its symbol (given by the
QgsFeatureRenderer
)a path of indexes inside its symbol and subsymbols.
For a symbol in a
QgsSingleSymbolRenderer
that has two symbol layers, it will give:“” for the symbol key
[0] and [1] for the two symbol layer indexes
For a
QgsRuleBasedRenderer
each rule key is the symbol key.For a symbol with a symbol layer that has a sub symbol (say a
QgsArrowSymbolLayer
), path to symbol layers of the sub symbol are given by a list of indexes:[0, 0] : first symbol layer of the sub symbol of the first symbol layer
[0, 1] : second symbol layer of the sub symbol of the first symbol layer
[2, 0] : first symbol layer of the sub symbol of the third symbol layer, etc.
New in version 3.12:
Methods
Returns the key associated to the symbol
Returns the symbol layer index path inside the symbol
- symbolKey(self) str ¶
Returns the key associated to the symbol
- Return type
str
- symbolLayerIndexPath(self) List[int] ¶
Returns the symbol layer index path inside the symbol
- Return type
List[int]