An infinite scrollable list of children that have equal size.
ScrollableLazyList differs from ScrollableList in that ScrollableLazyList uses an ItemListBuilder to lazily create children. That makes ScrollableLazyList suitable for an extremely large or infinite list of children but also makes it more verbose than ScrollableList.
ScrollableLazyList differs from LazyBlock in that ScrollableLazyList requires each of its children to be the same size. That makes ScrollableLazyList more efficient but less flexible than LazyBlock.
See also:
- Inheritance
- Object
- Widget
- StatelessWidget
- ScrollableLazyList
Constructors
- ScrollableLazyList({Key key, double initialScrollOffset, Axis scrollDirection: Axis.vertical, ViewportAnchor scrollAnchor: ViewportAnchor.start, ScrollListener onScrollStart, ScrollListener onScroll, ScrollListener onScrollEnd, SnapOffsetCallback snapOffsetCallback, Key scrollableKey, @required double itemExtent, int itemCount, @required ItemListBuilder itemBuilder, EdgeInsets padding })
-
Creates an infinite scrollable list of children that have equal size.
Properties
- initialScrollOffset → double
-
The scroll offset this widget should use when first created.
read-only - itemBuilder → ItemListBuilder
-
Returns a widget representing the item with the given index.
read-only - itemCount → int
-
The total number of list items.
read-only - itemExtent → double
-
The height of each item if scrollDirection is Axis.vertical, otherwise the width of each item.
read-only - onScroll → ScrollListener
-
Called whenever this widget's scroll offset changes.
read-only - onScrollEnd → ScrollListener
-
Called whenever this widget stops scrolling.
read-only - onScrollStart → ScrollListener
-
Called whenever this widget starts to scroll.
read-only - padding → EdgeInsets
-
The amount of space by which to inset the children inside the viewport.
read-only - scrollableKey → Key
-
The key for the Scrollable created by this widget.
read-only - scrollAnchor → ViewportAnchor
-
Whether to place first child at the start of the container or the last child at the end of the container, when the scrollable has not been scrolled and has no initial scroll offset.
read-only - scrollDirection → Axis
-
The axis along which this widget should scroll.
read-only - snapOffsetCallback → SnapOffsetCallback
-
when handling a fling.
read-only - hashCode → int
-
Get a hash code for this object.
read-only, inherited - key → Key
-
Controls how one widget replaces another widget in the tree.
read-only, inherited - runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Operators
-
operator ==(
other) → bool -
The equality operator.
inherited
Methods
-
build(
BuildContext context) → Widget -
Describes the part of the user interface represented by this widget.
-
createElement(
) → StatelessElement -
Creates a StatelessElement to manage this widget's location in the tree.
inherited -
debugFillDescription(
List<String> description) → void -
Add additional information to the given description for use by toString.
inherited -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited -
toString(
) → String -
Returns a string representation of this object.
inherited -
toStringShort(
) → String -
A short, textual description of this widget.
inherited