The BasemapGallery widget displays a collection of basemaps from one of:

• ArcGIS Online,
• a user-defined portal,
• or an array of custom BasemapGalleryItem objects.

Overview

The BasemapGallery widget enables users to browse a collection of basemaps and apply a selected BasemapGalleryItem to a connected GeoModel (such as an ArcGISMap or ArcGISScene) via a BasemapGalleryController.

Features

• Displays basemaps as BasemapGalleryItem objects in a grid or list layout.
• Option to automatically switch the layout based on available width using the BasemapGalleryViewStyle enum.
• Displays a name and thumbnail for each basemap.
• Shows selection state and exposes selection events via the controller.
• Can be configured to automatically change the basemap of a geo model based on user selection.

Usage

A BasemapGallery widget is created with the following parameters:

• controller: A property for the controller that contains state data for this widget.

The widget can be inserted into a widget tree by calling the constructor and supplying a BasemapGalleryController with an associated GeoModel (i.e. ArcGISMap or ArcGISScene).

@override
Widget build(BuildContext context) {
  return BasemapGallery(
    controller: BasemapGalleryController(geoModel: map),
  );
}