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.

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]