DataCell constructor Null safety

const DataCell(
  1. Widget child,
  2. {bool placeholder,
  3. bool showEditIcon,
  4. GestureTapCallback? onTap,
  5. GestureLongPressCallback? onLongPress,
  6. GestureTapDownCallback? onTapDown,
  7. GestureTapCallback? onDoubleTap,
  8. GestureTapCancelCallback? onTapCancel}
)

Creates an object to hold the data for a cell in a DataTable.

The first argument is the widget to show for the cell, typically a Text or DropdownButton widget; this becomes the child property and must not be null.

If the cell has no data, then a Text widget with placeholder text should be provided instead, and then the placeholder argument should be set to true.

Implementation

const DataCell(
  this.child, {
  this.placeholder = false,
  this.showEditIcon = false,
  this.onTap,
  this.onLongPress,
  this.onTapDown,
  this.onDoubleTap,
  this.onTapCancel,
}) : assert(child != null);