Class: QgsDataDefinedValueDialog

Utility classes for “en masse” size definition.

Note

This is an abstract class, with methods which must be implemented by a subclass.

The following methods must be implemented: setDataDefined(), symbolDataDefined(), value()

Class Hierarchy

Base classes

QDialog
QWidget
QObject
QPaintDevice

Subclasses

QgsDataDefinedRotationDialog	A dialog for configuring symbol-level data defined rotation.
QgsDataDefinedSizeDialog	A dialog for configuring symbol-level data defined size.
QgsDataDefinedWidthDialog	A dialog for configuring symbol-level data defined width.

Abstract Methods

symbolDataDefined

Methods

context	Returns the context in which the symbol widget is shown, e.g., the associated map canvas and expression contexts.
dataDefinedChanged
setContext	Sets the context in which the symbol widget is shown, e.g., the associated map canvas and expression contexts.
vectorLayer	Returns the vector layer associated with the widget.

class qgis.gui.QgsDataDefinedValueDialog

Bases: QDialog

__init__(symbolList: Iterable[QgsSymbol], layer: QgsVectorLayer | None, label: str | None)

Constructor

Parameters:

• symbolList (Iterable[QgsSymbol]) – must not be empty

• layer (Optional[QgsVectorLayer]) – must not be None

• label (Optional[str]) – value label

context(self) → QgsSymbolWidgetContext

Returns the context in which the symbol widget is shown, e.g., the associated map canvas and expression contexts.

See also

setContext()

Return type:

QgsSymbolWidgetContext

dataDefinedChanged(self)

setContext(self, context: QgsSymbolWidgetContext)

Sets the context in which the symbol widget is shown, e.g., the associated map canvas and expression contexts.

Parameters:

context (QgsSymbolWidgetContext) – symbol widget context

See also

context()

abstract symbolDataDefined()

vectorLayer(self) → QgsVectorLayer | None

Returns the vector layer associated with the widget.

Return type:

Optional[QgsVectorLayer]