CircleListViewport class

A viewport showing a subset of children on a wheel.

Typically used with CircleListScrollView, this viewport is similar to Viewport in that it shows a subset of children in a scrollable based on the scrolling offset and the children's dimensions. But uses RenderCircleListViewport to display the children on a wheel.

See also:

Inheritance

Constructors

CircleListViewport({Key? key, required double itemExtent, bool clipToSize = true, bool renderChildrenOutsideViewport = false, required ViewportOffset offset, required CircleListChildDelegate childDelegate, required Axis axis, double radius = 100})
Creates a viewport where children are rendered onto a wheel.
const

Properties

axis → Axis
final
childDelegate → CircleListChildDelegate
A delegate that lazily instantiates children.
final
clipToSize → bool
Whether to clip painted children to the inside of this viewport.
final
hashCode → int
The hash code for this object.
no setterinherited
itemExtent → double
The size of the children along the main axis. Children RenderBoxes will be given the BoxConstraints of this exact size.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
offset → ViewportOffset
ViewportOffset object describing the content that should be visible in the viewport.
final
radius → double
final
renderChildrenOutsideViewport → bool
Whether to paint children inside the viewport only.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

createElement() → CircleListElement
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
override
createRenderObject(BuildContext context) → RenderCircleListViewport
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.
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.
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}) → 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 RenderCircleListViewport 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