Class: QgsColorRampTransformer¶

class qgis.core.QgsColorRampTransformer(minValue: float = 0, maxValue: float = 1, ramp: QgsColorRamp = None, nullColor: Union[QColor, Qt.GlobalColor, QGradient] = QColor(0, 0, 0, 0))¶

Bases: qgis._core.QgsPropertyTransformer

Constructor for QgsColorRampTransformer.

Parameters

minValue – minimum expected value
maxValue – maximum expected value
ramp – source color ramp. Ownership is transferred to the transformer.
nullColor – color to return for null values

QgsColorRampTransformer(other: QgsColorRampTransformer) Copy constructor

QgsPropertyTransformer subclass for transforming a numeric value into a color from a color ramp.

New in version 3.0: Enums

Methods

`clone`
`color`	Calculates the color corresponding to a specific value.
`colorRamp`	Returns the color ramp used for calculating property colors.
`loadVariant`
`nullColor`	Returns the color corresponding to a null value.
`rampName`	Returns the color ramp’s name.
`setColorRamp`	Sets the color ramp to use for calculating property colors.
`setNullColor`	Sets the color corresponding to a null value.
`setRampName`	Sets the color ramp’s `name`.
`toExpression`
`toVariant`
`transform`
`transformNumeric`
`transformerType`

Signals

Attributes

clone(self) → QgsColorRampTransformer¶

color(self, value: float) → QColor¶

Calculates the color corresponding to a specific value.

Parameters: value – value to calculate color for
Returns: calculated color using transformer’s parameters and type

colorRamp(self) → QgsColorRamp¶

Returns the color ramp used for calculating property colors.

Returns: color ramp