Class: QgsColorBrewerColorRamp

Color ramp utilising “Color Brewer” preset color schemes.

Class Hierarchy

Base classes

QgsColorRamp

Abstract base class for color ramps.

Methods

colors	Returns the number of colors in the ramp.
loadPalette	Generates the scheme using the current name and number of colors
schemeName	Returns the name of the color brewer color scheme.
setColors	Sets the number of colors in the ramp.
setSchemeName	Sets the name of the color brewer color scheme.

Static Methods

create	Returns a new QgsColorBrewerColorRamp color ramp created using the properties encoded in a string map.
listSchemeNames	Returns a list of all valid color brewer scheme names.
listSchemeVariants	Returns a list of the valid variants (numbers of colors) for a specified color brewer scheme name
typeString	Returns the string identifier for QgsColorBrewerColorRamp.

class qgis.core.QgsColorBrewerColorRamp

Bases: QgsColorRamp

__init__(schemeName: str | None = '', colors: int = DEFAULT_COLORBREWER_COLORS, inverted: bool = False)

Constructor for QgsColorBrewerColorRamp

Parameters:

• schemeName (Optional[str] = '') – color brewer scheme name

• colors (int = DEFAULT_COLORBREWER_COLORS) – number of colors in ramp

• inverted (bool = False) – invert ramp ordering

__init__(a0: QgsColorBrewerColorRamp)

Parameters:

a0 (QgsColorBrewerColorRamp)

colors(self) → int

Returns the number of colors in the ramp.

See also

setColors()

Return type:

int

static create(properties: Dict[str, Any] = {}) → QgsColorRamp | None

Returns a new QgsColorBrewerColorRamp color ramp created using the properties encoded in a string map.

Parameters:

properties (Dict[str, Any] = {}) – color ramp properties

See also

properties()

Return type:

Optional[QgsColorRamp]

static listSchemeNames() → List[str]

Returns a list of all valid color brewer scheme names.

See also

listSchemeVariants()

Return type:

List[str]

static listSchemeVariants(schemeName: str | None) → List[int]

Returns a list of the valid variants (numbers of colors) for a specified color brewer scheme name

Parameters:

schemeName (Optional[str]) – color brewer scheme name

See also

listSchemeNames()

Return type:

List[int]

loadPalette(self)

Generates the scheme using the current name and number of colors

schemeName(self) → str

Returns the name of the color brewer color scheme.

See also

setSchemeName()

Return type:

str

setColors(self, colors: int)

Sets the number of colors in the ramp.

Parameters:

colors (int) – number of colors. Must match a valid value for the scheme, which can be retrieved using listSchemeVariants()

See also

colors()

setSchemeName(self, schemeName: str | None)

Sets the name of the color brewer color scheme.

Parameters:

schemeName (Optional[str]) – scheme name, must match a valid color brewer scheme name

See also

schemeName()

See also

listSchemeNames()

static typeString() → str

Returns the string identifier for QgsColorBrewerColorRamp.

Added in version 3.16.

Return type:

str