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.new({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
- paintOrder → SliverPaintOrder
-
The order in which to paint the slivers;
equivalently, the order in which to arrange them in the z-direction.
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 -
This method is called when a RenderObject that was previously
associated with this widget is removed from the render tree.
The provided RenderObject will be of the same type as the one created by
this widget's createRenderObject method.
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