ArcGIS Developers

LabelExpression QML Type

Abstract base class for the different types of expressions that can be used to create label text. More...

Import Statement: import Esri.ArcGISRuntime 100.11
Since: Esri.ArcGISRuntime 100.11


Inherited By:

ArcadeLabelExpression, SimpleLabelExpression, and WebmapLabelExpression



Detailed Description

Users can read the expression script using the expression property. To specify an expression script, users create an object of type ArcadeLabelExpression, SimpleLabelExpression or WebmapLabelExpression with the required expression script and assign it to the label expression object.

Note: You cannot declare or create a component of this type in QML code.

Property Documentation

expression : string

The label expression script string.

The expression is expected to be a complete, self-contained label expression in the language specified by the label expression subclass object.

objectType : Enums.LabelExpressionType

The type of the label expression (read-only).

The type specifies which language interpreter should be used to read and evaluate the expression. The object type is determined by which concrete subclass has been set into the label expression property.

See also Enums.LabelExpressionType.

Signal Documentation

void expressionChanged()

Emitted when the expression property changes.

Note: The corresponding handler is onExpressionChanged.

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