fromDynamic static method

JsonCustomScrollViewBuilder? fromDynamic(dynamic map, { JsonWidgetRegistry? registry, })

Builds the builder from a Map-like dynamic structure. This expects the JSON format to be of the following structure:

{
  "anchor": "<double>",
  "cacheExtent": "<double>",
  "clipBehavior": "<Clip>",
  "center": "<Key>",
  "controller": "<ScrollController>",
  "dragStartBehavior": "<DragStartBehavior>",
  "keyboardDismissBehavior": "<ScrollViewKeyboardDismissBehavior>",
  "padding": "<EdgeInsetsGeometry>",
  "physics": "<ScrollPhysics>",
  "primary": "<bool>",
  "restorationId": "<String>",
  "reverse": "<bool>",
  "scrollBehavior": "<ScrollBehavior>",
  "scrollDirection": "<Axis>",
  "semanticChildCount": "<int>",
  "shrinkWrap": "<bool>"
}

As a note, the ScrollController cannot be decoded via JSON. Instead, the only way to bind those values to the builder is to use a function or a variable reference via the JsonWidgetRegistry.

See also:

• ThemeDecoder.decodeAxis
• ThemeDecoder.decodeDragStartBehavior
• ThemeDecoder.decodeEdgeInsetsGeometry
• ThemeDecoder.decodeScrollBehavior
• ThemeDecoder.decodeScrollPhysics
• ThemeDecoder.decodeScrollViewKeyboardDismissBehavior

Implementation

static JsonCustomScrollViewBuilder? fromDynamic(
  dynamic map, {
  JsonWidgetRegistry? registry,
}) {
  JsonCustomScrollViewBuilder? result;

  if (map != null) {
    result = JsonCustomScrollViewBuilder(
      anchor: JsonClass.maybeParseDouble(map['anchor']),
      cacheExtent: JsonClass.maybeParseDouble(map['cacheExtent']),
      center:
          map['center'] is String ? ValueKey(map['center']) : map['center'],
      clipBehavior: ThemeDecoder.decodeClip(
            map['clipBehavior'],
            validate: false,
          ) ??
          Clip.hardEdge,
      controller: map['controller'],
      dragStartBehavior: ThemeDecoder.decodeDragStartBehavior(
            map['dragStartBehavior'],
            validate: false,
          ) ??
          DragStartBehavior.start,
      keyboardDismissBehavior:
          ThemeDecoder.decodeScrollViewKeyboardDismissBehavior(
        map['keyboardDismissBehavior'],
        validate: false,
      ),
      physics: ThemeDecoder.decodeScrollPhysics(
        map['physics'],
        validate: false,
      ),
      primary:
          map['primary'] == null ? null : JsonClass.parseBool(map['primary']),
      restorationId: map['restorationId'],
      reverse: JsonClass.parseBool(map['reverse']),
      scrollBehavior: ThemeDecoder.decodeScrollBehavior(
        map['scrollBehavior'],
        validate: false,
      ),
      scrollDirection: ThemeDecoder.decodeAxis(
            map['scrollDirection'],
            validate: false,
          ) ??
          Axis.vertical,
      semanticChildCount: JsonClass.maybeParseInt(map['semanticChildCount']),
      shrinkWrap: JsonClass.parseBool(map['shrinkWrap']),
    );
  }

  return result;
}