NestedScrollViewViewport class
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
-
- Object
- DiagnosticableTree
- Widget
- RenderObjectWidget
- MultiChildRenderObjectWidget
- Viewport
- NestedScrollViewViewport
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.
no setterinherited
- 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.
no setterinherited
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.
inherited
-
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.
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
-
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.
inherited