NestedScrollConnection class
A widget that allows the ancestor to consume the new scroll offset occurring in a descendant Scrollable widget before it is consumed by the child.
Used by NestedScrollConnection.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- NestedScrollConnection
Constructors
- NestedScrollConnection({Key? key, NestedScrollListener? onPreScroll, NestedScrollListener? onPostScroll, NestedScrollListener? onFling, NestedScrollListener? onBouncing, NestedScrollPredicate? predicate, NestedScrollPropagation propagation = .directional, Axis axis = .vertical, required Widget child})
-
const
Properties
- axis → Axis
-
The scroll axis handled by this connection.
Events from the other axis pass through to matching ancestors.
final
- child → Widget
-
The subtree whose nested scroll events are handled by this connection.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- onBouncing → NestedScrollListener?
-
Called for bouncing overflow or repayment of a borrowed bounce offset.
final
- onFling → NestedScrollListener?
-
Called before a ballistic simulation starts with the available velocity.
final
- onPostScroll → NestedScrollListener?
-
Called for movement remaining after the child reaches a scroll boundary.
final
- onPreScroll → NestedScrollListener?
-
Called before the child applies the available scroll movement.
final
- predicate → NestedScrollPredicate?
-
Whether this connection gets priority before normal propagation.
final
- propagation → NestedScrollPropagation
-
The order in which this connection and matching ancestors consume events.
Defaults to NestedScrollPropagation.directional.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< NestedScrollConnection> -
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.
inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent 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, int wrapWidth = 65}) → 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 ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
of(
BuildContext context) → NestedScrollConnectionState? - Finds the ancestor NestedScrollConnectionState from the closest instance of this class that encloses the given context.