fromDynamic static method

JsonAnimatedDefaultTextStyleBuilder? 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:

{
  "curve": "<Curve>",
  "duration": "<int; millis>",
  "maxLines": "<int>",
  "onEnd": "<VoidCallback>",
  "overflow": "<TextOverflow>",
  "softWrap": "<bool>",
  "style": "<TextStyle>",
  "textAlign": "<TextAlign>",
  "textHeightBehavior": "<TextHeightBehavior>",
  "textWidthBasis": "<TextWidthBasis>"
}

As a note, the Curve and VoidCallback 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.decodeTextOverflow
• ThemeDecoder.decodeTextStyle
• ThemeDecoder.decodeTextAlign
• ThemeDecoder.decodeTextHeightBehavior
• ThemeDecoder.decodeTextWidthBasis

Implementation

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

  if (map != null) {
    result = JsonAnimatedDefaultTextStyleBuilder(
      curve: map['curve'] ?? Curves.linear,
      duration: JsonClass.maybeParseDurationFromMillis(
        map['duration'],
      )!,
      maxLines: JsonClass.maybeParseInt(map['maxLines']),
      onEnd: map['onEnd'],
      overflow: ThemeDecoder.decodeTextOverflow(
            map['overflow'],
            validate: false,
          ) ??
          TextOverflow.clip,
      softWrap: JsonClass.parseBool(map['softWrap'] ?? true),
      style: ThemeDecoder.decodeTextStyle(
        map['style'],
        validate: false,
      )!,
      textAlign: ThemeDecoder.decodeTextAlign(
        map['textAlign'],
        validate: false,
      ),
      textHeightBehavior: ThemeDecoder.decodeTextHeightBehavior(
        map['textHeightBehavior'],
        validate: false,
      ),
      textWidthBasis: ThemeDecoder.decodeTextWidthBasis(
            map['textWidthBasis'],
            validate: false,
          ) ??
          TextWidthBasis.parent,
    );
  }

  return result;
}