toString method Null safety

  1. @override
String toString()
override

A string representation of this object.

Some classes have a default textual representation, often paired with a static parse function (like int.parse). These classes will provide the textual representation as their string represetion.

Other classes have no meaningful textual representation that a program will care about. Such classes will typically override toString to provide useful information when inspecting the object, mainly for debugging or logging.

Implementation

@override
String toString() {
  final List<String> properties = <String>[
    '$axisDirection',
    '$growthDirection',
    '$userScrollDirection',
    'scrollOffset: ${scrollOffset.toStringAsFixed(1)}',
    'remainingPaintExtent: ${remainingPaintExtent.toStringAsFixed(1)}',
    if (overlap != 0.0) 'overlap: ${overlap.toStringAsFixed(1)}',
    'crossAxisExtent: ${crossAxisExtent.toStringAsFixed(1)}',
    'crossAxisDirection: $crossAxisDirection',
    'viewportMainAxisExtent: ${viewportMainAxisExtent.toStringAsFixed(1)}',
    'remainingCacheExtent: ${remainingCacheExtent.toStringAsFixed(1)}',
    'cacheOrigin: ${cacheOrigin.toStringAsFixed(1)}',
  ];
  return 'SliverConstraints(${properties.join(', ')})';
}