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
- Diagnosticable
- 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 [] , @required SliverOverlapAbsorberHandle handle }) - Creates a variant of Viewport that has a SliverOverlapAbsorberHandle. [...]
Properties
- handle → SliverOverlapAbsorberHandle
-
The handle to the SliverOverlapAbsorber that is feeding this injector.
final
- anchor → double
-
The relative position of the zero scroll offset. [...]
final, inherited
- axisDirection → AxisDirection
-
The direction in which the offset's ViewportOffset.pixels increases. [...]
final, inherited
- 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. [...]
final, inherited
- center → Key
-
The first child in the GrowthDirection.forward growth direction. [...]
final, inherited
-
children
→ List<
Widget> -
The widgets below this widget in the tree. [...]
final, inherited
- crossAxisDirection → AxisDirection
-
The direction in which child should be laid out in the cross axis. [...]
final, inherited
- hashCode → int
-
The hash code for this object. [...]
read-only, inherited
- key → Key
-
Controls how one widget replaces another widget in the tree. [...]
final, inherited
- offset → ViewportOffset
-
Which part of the content inside the viewport should be visible. [...]
final, inherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Methods
-
createRenderObject(
BuildContext context) → RenderNestedScrollViewViewport -
Creates an instance of the RenderObject class that this
RenderObjectWidget represents, using the configuration described by this
RenderObjectWidget. [...]
override
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node. [...]
override
-
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
-
createElement(
) → _ViewportElement -
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of DiagnosticsNode objects describing this node's
children. [...]
@protected, inherited
-
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, inherited
-
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 toStringDeep. [...]
inherited
-
toString(
{DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String -
Returns 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
Operators
-
operator ==(
dynamic other) → bool -
The equality operator. [...]
inherited