BottomSheet class Null safety

A Material Design bottom sheet.

There are two kinds of bottom sheets in Material Design:

Persistent. A persistent bottom sheet shows information that supplements the primary content of the app. A persistent bottom sheet remains visible even when the user interacts with other parts of the app. Persistent bottom sheets can be created and displayed with the ScaffoldState.showBottomSheet function or by specifying the Scaffold.bottomSheet constructor parameter.
Modal. A modal bottom sheet is an alternative to a menu or a dialog and prevents the user from interacting with the rest of the app. Modal bottom sheets can be created and displayed with the showModalBottomSheet function.

The BottomSheet widget itself is rarely used directly. Instead, prefer to create a persistent bottom sheet with ScaffoldState.showBottomSheet or Scaffold.bottomSheet, and a modal bottom sheet with showModalBottomSheet.

Constructors

BottomSheet({Key? key, AnimationController? animationController, bool enableDrag = true, BottomSheetDragStartHandler? onDragStart, BottomSheetDragEndHandler? onDragEnd, Color? backgroundColor, double? elevation, ShapeBorder? shape, Clip? clipBehavior, BoxConstraints? constraints, required VoidCallback onClosing, required WidgetBuilder builder}): Creates a bottom sheet.
const

animationController → AnimationController?: The animation controller that controls the bottom sheet's entrance and exit animations.
final
backgroundColor → Color?: The bottom sheet's background color.
final
builder → WidgetBuilder: A builder for the contents of the sheet.
final
clipBehavior → Clip?: The content will be clipped (or not) according to this option.
final
constraints → BoxConstraints?: Defines minimum and maximum sizes for a BottomSheet.
final
elevation → double?: The z-coordinate at which to place this material relative to its parent.
final
enableDrag → bool: If true, the bottom sheet can be dragged up and down and dismissed by swiping downwards.
final
hashCode → int: The hash code for this object.
nonVirtual">@nonVirtualread-onlyinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
onClosing → VoidCallback: Called when the bottom sheet begins to close.
final
onDragEnd → BottomSheetDragEndHandler?: Called when the user stops dragging the bottom sheet, if enableDrag is true.
final
onDragStart → BottomSheetDragStartHandler?: Called when the user begins dragging the bottom sheet vertically, if enableDrag is true.
final
runtimeType → Type: A representation of the runtime type of the object.
read-onlyinherited
shape → ShapeBorder?: The shape of the bottom sheet.
final

createElement() → StatefulElement: Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<BottomSheet>: Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children.
protected">@protectedinherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a non-existent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode: Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String: A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String: Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String: Returns a one-line detailed description of the object.
inherited
toStringShort() → String: A short, textual description of this widget.
inherited

operator ==(Object other) → bool: The equality operator.
nonVirtual">@nonVirtualinherited

createAnimationController(TickerProvider vsync) → AnimationController: Creates an AnimationController suitable for a BottomSheet.animationController.