QgsDataDefinedValueDialog class
Utility classes for "en masse" size definition.
Contents
Base classes
- class QgsExpressionContextGenerator
- Abstract interface for generating an expression context.
Constructors, destructors, conversion operators
- QgsDataDefinedValueDialog(const QList<QgsSymbol*>& symbolList, QgsVectorLayer* layer, const QString& label)
- Constructor.
Public functions
- auto context() const -> QgsSymbolWidgetContext
- Returns the context in which the symbol widget is shown, e.g., the associated map canvas and expression contexts.
- void setContext(const QgsSymbolWidgetContext& context)
- Sets the context in which the symbol widget is shown, e.g., the associated map canvas and expression contexts.
- auto vectorLayer() const -> const QgsVectorLayer*
- Returns the vector layer associated with the widget.
Protected functions
- void init(int propertyKey)
- Should be called in the constructor of child classes.
Private functions
- auto createExpressionContext() const -> QgsExpressionContext override
- This method needs to be reimplemented in all classes which implement this interface and return an expression context.
Function documentation
QgsDataDefinedValueDialog::
Constructor.
| Parameters | |
|---|---|
| symbolList | must not be empty |
| layer | must not be null |
| label | value label |
QgsSymbolWidgetContext QgsDataDefinedValueDialog::
Returns the context in which the symbol widget is shown, e.g., the associated map canvas and expression contexts.
void QgsDataDefinedValueDialog::
Sets the context in which the symbol widget is shown, e.g., the associated map canvas and expression contexts.
| Parameters | |
|---|---|
| context | symbol widget context |
const QgsVectorLayer* QgsDataDefinedValueDialog::
Returns the vector layer associated with the widget.
void QgsDataDefinedValueDialog::
Should be called in the constructor of child classes.
QgsExpressionContext QgsDataDefinedValueDialog::
This method needs to be reimplemented in all classes which implement this interface and return an expression context.