SimpleExpansionTile constructor

const SimpleExpansionTile({
  1. Key? key,
  2. Widget? leading,
  3. required Widget title,
  4. Widget? subtitle,
  5. Color? backgroundColor,
  6. required ValueChanged<bool> onExpansionChanged,
  7. List<Widget> children = const <Widget>[],
  8. Widget? trailing,
  9. bool initiallyExpanded = false,
})

Creates a single-line ListTile with a trailing button that expands or collapses the tile to reveal or hide the children. The initiallyExpanded property must be non-null.

Implementation

const SimpleExpansionTile({
  Key? key,
  this.leading,
  required this.title,
  this.subtitle,
  this.backgroundColor,
  required this.onExpansionChanged,
  this.children = const <Widget>[],
  this.trailing,
  this.initiallyExpanded = false,
})  : assert(initiallyExpanded != null),
      super(key: key);