ListWheelState class

解决父组件重新 build 时 改变子元素长度后显示异常问题 添加支持初始位置

Inheritance
Available Extensions

Constructors

ListWheelState({Key? key, FixedExtentScrollController? controller, bool disposeController = true, IndexedWidgetBuilder? itemBuilder, int? itemCount, ListWheelChildDelegateType childDelegateType = ListWheelChildDelegateType.looping, ValueChanged<int>? onScrollEnd, List<Widget>? children, NotificationListenerCallback<ScrollNotification>? onNotification, ValueChanged<int>? onScrollStart, ValueChanged<int>? onScrollUpdate, WheelOptions? options, int initialItem = 0, Duration animateDuration = const Duration(milliseconds: 10), Curve curve = Curves.linear, ValueCallback<FixedExtentScrollController>? onCreateController})
const
ListWheelState.list({Key? key, FixedExtentScrollController? controller, ValueChanged<int>? onScrollEnd, required List<Widget>? children, NotificationListenerCallback<ScrollNotification>? onNotification, ValueChanged<int>? onScrollStart, ValueChanged<int>? onScrollUpdate, WheelOptions? options, bool disposeController = true, int initialItem = 0, ValueCallback<FixedExtentScrollController>? onCreateController, Duration animateDuration = const Duration(milliseconds: 10), Curve curve = Curves.linear})
const
ListWheelState.looping({Key? key, FixedExtentScrollController? controller, ValueChanged<int>? onScrollEnd, List<Widget>? children, NotificationListenerCallback<ScrollNotification>? onNotification, ValueChanged<int>? onScrollStart, ValueChanged<int>? onScrollUpdate, WheelOptions? options, bool disposeController = true, int initialItem = 0, ValueCallback<FixedExtentScrollController>? onCreateController, Duration animateDuration = const Duration(milliseconds: 10), Curve curve = Curves.linear})
const

Properties

animateDuration → Duration
animateToItem
final
childDelegateType → ListWheelChildDelegateType
滚轮类型
final
children → List<Widget>?
子组件
final
controller → FixedExtentScrollController?
控制器
final
curve → Curve
final
disposeController → bool
默认为 true 组件 dispose 自动调用 controller.dispose()
final
hashCode → int
The hash code for this object.
no setterinherited
initialItem → int
初始item
final
itemBuilder → IndexedWidgetBuilder?
条目构造器
final
itemCount → int?
条目数量
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onCreateController → ValueCallback<FixedExtentScrollController>?
controller 为null 自动创建 controller 回调
final
onNotification → NotificationListenerCallback<ScrollNotification>?
滚动监听 添加此方法 onScrollStart,onScrollUpdate,onScrollEnd 无效
final
onScrollEnd → ValueChanged<int>?
滚动结束回调
final
onScrollStart → ValueChanged<int>?
滚动开始回调
final
onScrollUpdate → ValueChanged<int>?
滚动中回调
final
options → WheelOptions?
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<ListWheelState>
Creates the mutable state for this widget at a given location in the tree.
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
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

Operators

operator ==(Object other) → bool
The equality operator.
inherited