NestedScrollViewViewport class Null safety

The Viewport variant used by NestedScrollView.

This viewport takes a SliverOverlapAbsorberHandle and notifies it any time the viewport needs to recompute its layout (e.g. when it is scrolled).

Inheritance

Constructors

NestedScrollViewViewport({Key? key, AxisDirection axisDirection = AxisDirection.down, AxisDirection? crossAxisDirection, double anchor = 0.0, required ViewportOffset offset, Key? center, List<Widget> slivers = const <Widget>[], required SliverOverlapAbsorberHandle handle, Clip clipBehavior = Clip.hardEdge})
Creates a variant of Viewport that has a SliverOverlapAbsorberHandle.

Properties

anchor → double
The relative position of the zero scroll offset.
finalinherited
axisDirection → AxisDirection
The direction in which the offset's ViewportOffset.pixels increases.
finalinherited
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.
finalinherited
cacheExtentStyle → CacheExtentStyle
Controls how the cacheExtent is interpreted.
finalinherited
center → Key?
The first child in the GrowthDirection.forward growth direction.
finalinherited
children → List<Widget>
The widgets below this widget in the tree.
finalinherited
clipBehavior → Clip
The content will be clipped (or not) according to this option.
finalinherited
crossAxisDirection → AxisDirection?
The direction in which child should be laid out in the cross axis.
finalinherited
handle → SliverOverlapAbsorberHandle
The handle to the SliverOverlapAbsorber that is feeding this injector.
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
offset → ViewportOffset
Which part of the content inside the viewport should be visible.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited

Methods

createElement() → MultiChildRenderObjectElement
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
createRenderObject(BuildContext context) → RenderNestedScrollViewViewport
Creates an instance of the RenderObject class that this RenderObjectWidget represents, using the configuration described by this RenderObjectWidget.
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.
override
didUnmountRenderObject(covariant RenderObject renderObject) → void
A render object previously associated with this widget has been removed from the tree. The given RenderObject will be of the same type as returned by this object's createRenderObject.
protected">@protectedinherited
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
updateRenderObject(BuildContext context, covariant RenderNestedScrollViewViewport renderObject) → void
Copies the configuration described by this RenderObjectWidget to the given RenderObject, which will be of the same type as returned by this object's createRenderObject.
override

Operators

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