GeoJsonLayer class

Creates a layer that displays contents of a GeoJSON source.

Inheritance

Constructors

GeoJsonLayer.new({Key? key, required GeoJsonProvider data, OnPointCallback? onPoint, OnPolylineCallback? onPolyline, OnPolygonCallback? onPolygon, FeatureFilterCallback? filter, GeoJsonStyleDefaults? styleDefaults, LayerHitNotifier<Object>? hitNotifier, double polylineHitbox = 10})
Creates a layer instance. You might be better off using a specialized constructor:
const
GeoJsonLayer.asset(String name, {Key? key, AssetBundle? bundle, OnPointCallback? onPoint, OnPolylineCallback? onPolyline, OnPolygonCallback? onPolygon, FeatureFilterCallback? filter, GeoJsonStyleDefaults? styleDefaults, LayerHitNotifier<Object>? hitNotifier, double polylineHitbox = 10})
GeoJsonLayer.file(File file, {Key? key, OnPointCallback? onPoint, OnPolylineCallback? onPolyline, OnPolygonCallback? onPolygon, FeatureFilterCallback? filter, GeoJsonStyleDefaults? styleDefaults, LayerHitNotifier<Object>? hitNotifier, double polylineHitbox = 10})
GeoJsonLayer.memory(Map<String, dynamic> data, {Key? key, OnPointCallback? onPoint, OnPolylineCallback? onPolyline, OnPolygonCallback? onPolygon, FeatureFilterCallback? filter, GeoJsonStyleDefaults? styleDefaults, LayerHitNotifier<Object>? hitNotifier, double polylineHitbox = 10})
GeoJsonLayer.network(String url, {Key? key, OnPointCallback? onPoint, OnPolylineCallback? onPolyline, OnPolygonCallback? onPolygon, FeatureFilterCallback? filter, GeoJsonStyleDefaults? styleDefaults, LayerHitNotifier<Object>? hitNotifier, double polylineHitbox = 10})

Properties

data → GeoJsonProvider
GeoJSON data source. Just like with ImageProvider, it's possible to do network calls or use an asset-bundled file. Use MemoryGeoJson to supply a Map if you don't need any of that.
final
filter → FeatureFilterCallback?
A function to exclude some features from the GeoJSON. It takes a geometryType and feature properties to make that decision. Return false when you don't need the feature.
final
hashCode → int
The hash code for this object.
no setterinherited
hitNotifier → LayerHitNotifier<Object>?
Hit notifier for polylines and polygons. See LayerHitNotifier documentation for explanations and an example.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onPoint → OnPointCallback?
This function receives a marker location and feature properties, and builds a flutter_map Marker. See defaultOnPoint for an example. You can call that function first to process styles, and then adjust the returned marker.
final
onPolygon → OnPolygonCallback?
This function takes feature properties and some other parameters to build a flutter_map Polygon. See defaultOnPolygon for an example.
final
onPolyline → OnPolylineCallback?
This function takes a list of points and feature properties to build a flutter_map Polyline. See defaultOnPolyline for an example.
final
polylineHitbox → double
For a polyline, a change to adjust its hit box. The default is the same as in Polyline, 10 pixels.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
styleDefaults → GeoJsonStyleDefaults?
When not overriding callbacks, this layer uses the default builders. Those use object properties to determine colors and dimensions. To change default values, use this property.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<GeoJsonLayer>
Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

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