ScrollView class

A widget that scrolls.

Scrollable widgets consist of three pieces:

A Scrollable widget, which listens for various user gestures and implements the interaction design for scrolling.
A viewport widget, such as Viewport or ShrinkWrappingViewport, which implements the visual design for scrolling by displaying only a portion of the widgets inside the scroll view.
One or more slivers, which are widgets that can be composed to created various scrolling effects, such as lists, grids, and expanding headers.

ScrollView helps orchestrate these pieces by creating the Scrollable and the viewport and deferring to its subclass to create the slivers.

To control the initial scroll offset of the scroll view, provide a controller with its ScrollController.initialScrollOffset property set.

Constructors

ScrollView({Key key, Axis scrollDirection: Axis.vertical, bool reverse: false, ScrollController controller, bool primary, ScrollPhysics physics, bool shrinkWrap: false, double cacheExtent, int semanticChildCount }): Creates a widget that scrolls. [...]
const

Properties

cacheExtent → double: The viewport has an area before and after the visible area to cache items that are about to become visible when the user scrolls. [...]
final
controller → ScrollController: An object that can be used to control the position to which this scroll view is scrolled. [...]
final
physics → ScrollPhysics: How the scroll view should respond to user input. [...]
final
primary → bool: Whether this is the primary scroll view associated with the parent PrimaryScrollController. [...]
final
reverse → bool: Whether the scroll view scrolls in the reading direction. [...]
final
scrollDirection → Axis: The axis along which the scroll view scrolls. [...]
final
semanticChildCount → int: The number of children that will contribute semantic information. [...]
final
shrinkWrap → bool: Whether the extent of the scroll view in the scrollDirection should be determined by the contents being viewed. [...]
final
hashCode → int: The hash code for this object. [...]
read-only, inherited
key → Key: Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType → Type: A representation of the runtime type of the object.
read-only, inherited

Methods

build(BuildContext context) → Widget: Describes the part of the user interface represented by this widget. [...]
override
buildSlivers(BuildContext context) → List<Widget>: Build the list of widgets to place inside the viewport. [...]
@protected
buildViewport(BuildContext context, ViewportOffset offset, AxisDirection axisDirection, List<Widget> slivers) → Widget: Build the viewport. [...]
@protected
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node. [...]
override
getDirection(BuildContext context) → AxisDirection: Returns the AxisDirection in which the scroll view scrolls. [...]
@protected
createElement() → StatelessElement: Creates a StatelessElement to manage this widget's location in the tree. [...]
inherited
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, 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 toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String: Returns 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

Operators

operator ==(dynamic other) → bool: The equality operator. [...]
inherited

widgets library

ScrollView class

Constructors

Properties

Methods

Operators