Class: QgsDropShadowEffect

class qgis.core.QgsDropShadowEffect

Bases: QgsShadowEffect

A paint effect which draws an offset and optionally blurred drop shadow

Methods

boundingRect

clone

rtype

QgsDropShadowEffect

create

Creates a new QgsDropShadowEffect effect from a properties string map.

draw

drawSource

Draws the source QPicture onto the specified painter.

exteriorShadow

rtype

bool

fixQPictureDpi

Applies a workaround to a QPainter to avoid an issue with incorrect scaling when drawing QPictures.

imageOffset

Returns the offset which should be used when drawing the source image on to a destination render context.

source

Returns the source QPicture.

sourceAsImage

Returns the source QPicture rendered to a new QImage.

type

rtype

str

boundingRect(self, rect: QRectF, context: QgsRenderContext)QRectF
clone(self)QgsDropShadowEffect
Return type

QgsDropShadowEffect

create(map: Dict[str, str])QgsPaintEffect

Creates a new QgsDropShadowEffect effect from a properties string map.

Parameters

map (Dict[str) – encoded properties string map

Return type

QgsPaintEffect

Returns

new QgsDropShadowEffect

draw(self, context: QgsRenderContext)
drawSource(self, painter: QPainter)

Draws the source QPicture onto the specified painter. Handles scaling of the picture to account for the destination painter’s DPI.

Parameters

painter – destination painter

See also

source()

See also

sourceAsImage()

exteriorShadow(self)bool
Return type

bool

fixQPictureDpi(self, painter: QPainter)

Applies a workaround to a QPainter to avoid an issue with incorrect scaling when drawing QPictures. This may need to be called by derived classes prior to rendering results onto a painter.

Parameters

painter – destination painter

imageOffset(self, context: QgsRenderContext)QPointF

Returns the offset which should be used when drawing the source image on to a destination render context.

Parameters

context – destination render context

Returns

point offset for image top left corner

See also

sourceAsImage()

source(self)QPicture

Returns the source QPicture. The draw() member can utilize this when drawing the effect.

Returns

source QPicture

See also

drawSource()

See also

sourceAsImage()

sourceAsImage(self, context: QgsRenderContext)QImage

Returns the source QPicture rendered to a new QImage. The draw() member can utilize this when drawing the effect. The image will be padded or cropped from the original source QPicture by the results of the boundingRect() method. The result is cached to speed up subsequent calls to sourceAsImage.

Returns

source QPicture rendered to an image

See also

drawSource()

See also

source()

See also

imageOffset()

See also

boundingRect()

type(self)str
Return type

str