SelectionOverlay constructor

SelectionOverlay({ required BuildContext context, Widget? debugRequiredFor, required TextSelectionHandleType startHandleType, required double lineHeightAtStart, ValueListenable<bool>? startHandlesVisible, ValueChanged<DragStartDetails>? onStartHandleDragStart, ValueChanged<DragUpdateDetails>? onStartHandleDragUpdate, ValueChanged<DragEndDetails>? onStartHandleDragEnd, required TextSelectionHandleType endHandleType, required double lineHeightAtEnd, ValueListenable<bool>? endHandlesVisible, ValueChanged<DragStartDetails>? onEndHandleDragStart, ValueChanged<DragUpdateDetails>? onEndHandleDragUpdate, ValueChanged<DragEndDetails>? onEndHandleDragEnd, ValueListenable<bool>? toolbarVisible, required List<TextSelectionPoint> selectionEndPoints, required TextSelectionControls? selectionControls, required TextSelectionDelegate selectionDelegate, required ClipboardStatusNotifier? clipboardStatus, required LayerLink startHandleLayerLink, required LayerLink endHandleLayerLink, required LayerLink toolbarLayerLink, DragStartBehavior dragStartBehavior = DragStartBehavior.start, VoidCallback? onSelectionHandleTapped, Offset? toolbarLocation, })

Creates an object that manages overlay entries for selection handles.

The context must not be null and must have an Overlay as an ancestor.

Implementation

SelectionOverlay({
  required this.context,
  this.debugRequiredFor,
  required TextSelectionHandleType startHandleType,
  required double lineHeightAtStart,
  this.startHandlesVisible,
  this.onStartHandleDragStart,
  this.onStartHandleDragUpdate,
  this.onStartHandleDragEnd,
  required TextSelectionHandleType endHandleType,
  required double lineHeightAtEnd,
  this.endHandlesVisible,
  this.onEndHandleDragStart,
  this.onEndHandleDragUpdate,
  this.onEndHandleDragEnd,
  this.toolbarVisible,
  required List<TextSelectionPoint> selectionEndPoints,
  required this.selectionControls,
  required this.selectionDelegate,
  required this.clipboardStatus,
  required this.startHandleLayerLink,
  required this.endHandleLayerLink,
  required this.toolbarLayerLink,
  this.dragStartBehavior = DragStartBehavior.start,
  this.onSelectionHandleTapped,
  Offset? toolbarLocation,
})  : _startHandleType = startHandleType,
      _lineHeightAtStart = lineHeightAtStart,
      _endHandleType = endHandleType,
      _lineHeightAtEnd = lineHeightAtEnd,
      _selectionEndPoints = selectionEndPoints,
      _toolbarLocation = toolbarLocation {
  final OverlayState? overlay = Overlay.of(context, rootOverlay: true);
  assert(
    overlay != null,
    'No Overlay widget exists above $context.\n'
    'Usually the Navigator created by WidgetsApp provides the overlay. Perhaps your '
    'app content was created above the Navigator with the WidgetsApp builder parameter.',
  );
}