Subgroup: Color

Class: QgsColorRampTransformer¶

class qgis.core.QgsColorRampTransformer¶

Bases: qgis._core.QgsPropertyTransformer

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

New in version 3.0: Methods

`clone`
`color`	Calculates the color corresponding to a specific value.
`colorRamp`	Returns the color ramp used for calculating property colors.
`create`	Factory method for creating a new property transformer of the specified type.
`curveTransform`	Returns the curve transform applied to input values before they are transformed by the individual transform subclasses.
`fromExpression`	Attempts to parse an expression into a corresponding property transformer.
`loadVariant`
`maxValue`	Returns the maximum value expected by the transformer.
`minValue`	Returns the minimum value expected by the transformer.
`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.
`setCurveTransform`	Sets a curve transform to apply to input values before they are transformed by the individual transform subclasses.
`setMaxValue`	Sets the maximum value expected by the transformer.
`setMinValue`	Sets the minimum value expected by the transformer.
`setNullColor`	Sets the color corresponding to a null value.
`setRampName`	Sets the color ramp’s `name`.
`toExpression`
`toVariant`
`transform`
`transformNumeric`
`transformerType`

Attributes

`ColorRampTransformer`
`GenericNumericTransformer`
`SizeScaleTransformer`

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