textOverlay method

Widget? textOverlay({ required double slotMain, })

Text for the visible slot. Null when this item has no text to show.

slotMain is the item's current main-axis size, so the line and its alignment update as the slot changes during a scroll.

Implementation

Widget? textOverlay({required double slotMain}) {
  final bool dynamicText = applyDynamicTextContentTransform;
  final bool small = slotMain <= 56;
  final bool large = slotMain >= 200;
  final Widget? shownTitle = !dynamicText || large ? title : null;
  final bool prefixLine = dynamicText && prefixText != null && small;
  final Widget? shownBody = prefixLine ? prefixText : subtitle;
  if (shownTitle == null && shownBody == null) {
    return null;
  }
  return Padding(
    padding: const EdgeInsets.all(12),
    child: Align(
      alignment: Alignment.bottomLeft,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        mainAxisSize: MainAxisSize.min,
        children: <Widget>[
          if (shownTitle != null) _oneLine(shownTitle),
          if (shownBody != null) _oneLine(shownBody),
        ],
      ),
    ),
  );
}