Renderer class final

A base class for renderers that use a collection of one or more symbols to display features in a Layer or graphics in a GraphicsOverlay.

If the renderer contains more than a single symbol, it uses the rules to determine the symbol to apply to each geoelement, based on one or several attribute values. There are three basic types of renderers:

  • SimpleRenderer - simple renderers use a single symbol for all geoelements.
  • UniqueValueRenderer - unique value renders define a different symbol for each unique value of an attribute.
  • ClassBreaksRenderer - class break renderers define a different symbol for each range of numeric values.

To symbolize and display the geoelements, apply the renderer to the FeatureLayer.renderer, the GraphicsOverlay.renderer, or the ArcGISSceneLayer.renderer.

A GraphicsOverlay can contain graphics with different geometry dimensions, such as an ArcGISPoint and Polygon. A Renderer, however, can only provide symbols with one geometry dimension. Therefore, if you apply a renderer to a graphics overlay, only graphics with the specified geometry dimension are displayed. All other graphics are not visible.

If you apply an ArcGISSymbol directly to a graphic, the symbol displays in preference to the GraphicsOverlay.renderer.

For raster data, rendering is handled by a RasterRenderer.

Implemented types
Mixed in types
Implementers

Constructors

Renderer.fromJson(Map<String, dynamic> json)
factory
Renderer.fromJsonString(String jsonString)
factory

Properties

hashCode → int
The hash code for this object.
no setteroverride
rotationExpression ↔ String
The expression describing how attributes values are translated into a rotation to be applied to the GeoElement.
getter/setter pair
rotationType ↔ RotationType
Indicates whether the rotation calculated from the Renderer.rotationExpression is interpreted as arithmetic or geographic.
getter/setter pair
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

clone() → Renderer
Clones the Renderer.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
symbolForFeature({required Feature feature, bool applyAttributeOverrides = false}) → ArcGISSymbol?
Returns the symbol that is used to visualize the given feature with override attributes from the renderer.
symbolForGraphic({required Graphic graphic, bool applyAttributeOverrides = false}) → ArcGISSymbol?
Returns the symbol that is used to visualize the given graphic with override attributes from the renderer.
toJson() → Map<String, dynamic>
Returns a JSON representation of this Object in the data type used by jsonDecode.
inherited
toJsonString() → String
Returns a JSON representation of this Object as a String.
override
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
override