showOverflowIndicator method

void showOverflowIndicator(PaintingContext context, { required Offset offset, })

Implementation

void showOverflowIndicator(PaintingContext context,
    {required Offset offset}) {
  final List<DiagnosticsNode> debugOverflowHints = <DiagnosticsNode>[
    ErrorDescription(
      'The overflowing $runtimeType has an orientation of $_direction.',
    ),
    ErrorDescription(
      'The edge of the $runtimeType that is overflowing has been marked '
      'in the rendering with a yellow and black striped pattern. This is '
      'usually caused by the contents being too big for the $runtimeType.',
    ),
    ErrorHint(
      'Consider applying a flex factor (e.g. using an Expanded widget) to '
      'force the children of the $runtimeType to fit within the available '
      'space instead of being sized to their natural size.',
    ),
    ErrorHint(
      'This is considered an error condition because it indicates that there '
      'is content that cannot be seen. If the content is legitimately bigger '
      'than the available space, consider clipping it with a ClipRect widget '
      'before putting it in the flex, or using a scrollable container rather '
      'than a Flex, like a ListView.',
    ),
  ];

  // Simulate a child rect that overflows by the right amount. This child
  // rect is never used for drawing, just for determining the overflow
  // location and amount.
  final Rect overflowChildRect;
  switch (_direction) {
    case Axis.horizontal:
      overflowChildRect =
          Rect.fromLTWH(0.0, 0.0, size.width + _overflow, 0.0);
      break;
    case Axis.vertical:
      overflowChildRect =
          Rect.fromLTWH(0.0, 0.0, 0.0, size.height + _overflow);
      break;
  }
  paintCustomOverflowIndicator(
      context, offset, Offset.zero & size, overflowChildRect,
      overflowHints: debugOverflowHints);
}