Unidoc Title Here/viz/viz.macros/ObjField

ObjField

viz.macros.ObjField

class ObjField(path: List[String], fieldMap: Map[String, Any]) extends Selectable

Accessor for object fields in a Vega/Vega-Lite spec.

Provides type-safe modification of object-valued JSON fields. Extends Selectable to allow compile-time checked access to nested fields via dot notation.

The := operator replaces the entire object, while += performs a deep merge preserving existing fields.

Value parameters

fieldMap: Map of nested field names to their accessor objects (used by selectDynamic)
path: The JSON path to this field as a list of field names

Attributes

Example

// Replace entire object spec.build(_.title := json"{\"text\": \"New\", \"fontSize\": 20}")
// Deep merge - adds/updates fields while preserving others spec.build(_.title += json"{\"color\": \"red\"}")
// Access nested fields with compile-time checking spec.build(_.title.text := "New Title", _.title.fontSize := 20)

Graph

Supertypes

trait Selectable

class Object

trait Matchable

class Any

Members list

Value members

Concrete methods

Deep merge a JSON value into this object.

Existing fields not present in j are preserved. Fields present in both are overwritten by j.

Attributes

Deep merge a JSON object into this object.

Existing fields not present in obj are preserved. Fields present in both are overwritten by obj.

Attributes

Replace the entire object with arbitrary JSON

Attributes

Replace the entire object with a JSON object

Attributes

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