Timeline class Null safety

A scrollable timeline of widgets arranged linearly.

Inheritance

Constructors

Timeline({Key? key, Axis? scrollDirection, bool reverse = false, ScrollController? controller, bool? primary, ScrollPhysics? physics, bool shrinkWrap = false, EdgeInsetsGeometry? padding, double? itemExtent, bool addAutomaticKeepAlives = true, bool addRepaintBoundaries = true, bool addSemanticIndexes = true, double? cacheExtent, List<Widget> children = const <Widget>[], int? semanticChildCount, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, String? restorationId, Clip clipBehavior = Clip.hardEdge, TimelineThemeData? theme})
Creates a scrollable, linear array of widgets from an explicit List.
Timeline.builder({Key? key, Axis? scrollDirection, bool reverse = false, ScrollController? controller, bool? primary, ScrollPhysics? physics, bool shrinkWrap = false, EdgeInsetsGeometry? padding, double? itemExtent, required IndexedWidgetBuilder itemBuilder, required int itemCount, bool addAutomaticKeepAlives = true, bool addRepaintBoundaries = true, bool addSemanticIndexes = true, double? cacheExtent, int? semanticChildCount, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, String? restorationId, Clip clipBehavior = Clip.hardEdge, TimelineThemeData? theme})
Creates a scrollable, linear array of widgets that are created on demand.
Timeline.custom({Key? key, Axis? scrollDirection, bool reverse = false, ScrollController? controller, bool? primary, ScrollPhysics? physics, bool shrinkWrap = false, EdgeInsetsGeometry? padding, double? itemExtent, required SliverChildDelegate childrenDelegate, double? cacheExtent, int? semanticChildCount, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, String? restorationId, Clip clipBehavior = Clip.hardEdge, TimelineThemeData? theme})
Creates a scrollable, linear array of widgets with a custom child model.
Timeline.tileBuilder({Key? key, required TimelineTileBuilder builder, Axis? scrollDirection, bool reverse = false, ScrollController? controller, bool? primary, ScrollPhysics? physics, bool shrinkWrap = false, EdgeInsetsGeometry? padding, double? cacheExtent, int? semanticChildCount, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, String? restorationId, Clip clipBehavior = Clip.hardEdge, TimelineThemeData? theme})
Creates a scrollable, linear array of widgets that are created on demand.
factory

Properties

anchor double
The relative position of the zero scroll offset.
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
center Key?
The first child in the GrowthDirection.forward growth direction.
finalinherited
childrenDelegate SliverChildDelegate
A delegate that provides the children for the Timeline.
final
clipBehavior Clip
The content will be clipped (or not) according to this option.
finalinherited
controller ScrollController?
An object that can be used to control the position to which this scroll view is scrolled.
finalinherited
dragStartBehavior DragStartBehavior
Determines the way that drag start behavior is handled.
finalinherited
hashCode int
The hash code for this object.
@nonVirtualread-onlyinherited
itemExtent double?
If non-null, forces the children to have the given extent in the scroll direction.
final
key Key?
Controls how one widget replaces another widget in the tree.
finalinherited
keyboardDismissBehavior ScrollViewKeyboardDismissBehavior
ScrollViewKeyboardDismissBehavior the defines how this ScrollView will dismiss the keyboard automatically.
finalinherited
padding EdgeInsetsGeometry?
The amount of space by which to inset the children.
finalinherited
physics ScrollPhysics?
How the scroll view should respond to user input.
finalinherited
primary bool?
Whether this is the primary scroll view associated with the parent PrimaryScrollController.
finalinherited
restorationId String?
Restoration ID to save and restore the scroll offset of the scrollable.
finalinherited
reverse bool
Whether the scroll view scrolls in the reading direction.
finalinherited
runtimeType Type
A representation of the runtime type of the object.
read-onlyinherited
scrollBehavior ScrollBehavior?
A ScrollBehavior that will be applied to this widget individually.
finalinherited
scrollDirection Axis
The axis along which the scroll view scrolls.
finalinherited
semanticChildCount int?
The number of children that will contribute semantic information.
finalinherited
shrinkWrap bool
Whether the extent of the scroll view in the scrollDirection should be determined by the contents being viewed.
finalinherited
theme TimelineThemeData?
Default visual properties, like colors, size and spaces, for this timeline's component widgets.
final

Methods

build(BuildContext context) Widget
Describes the part of the user interface represented by this widget.
inherited
buildChildLayout(BuildContext context) Widget
Subclasses should override this method to build the layout model.
override
buildSlivers(BuildContext context) List<Widget>
Build the list of widgets to place inside the viewport.
inherited
buildViewport(BuildContext context, ViewportOffset offset, AxisDirection axisDirection, List<Widget> slivers) Widget
Build the viewport.
@protectedinherited
createElement() StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
@protectedinherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
getDirection(BuildContext context) AxisDirection
Returns the AxisDirection in which the scroll view scrolls.
@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

Operators

operator ==(Object other) bool
The equality operator.
@nonVirtualinherited