Counter class

Inheritance

Constructors

Counter({required num min, required num max, num? initial, num? bound, num step = 1, Configuration? configuration, ValueChanged<num>? onValueChanged, Key? key})

Properties

bound → num?
限制值 Value和initial不能在(min, bound)之间 但可以是=min或=bound
final
configuration → Configuration
外观配置
final
hashCode → int
The hash code for this object.
no setterinherited
initial → num?
初始值，如果初始值为null或无效，则初始值为min最小值
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
max → num
最大值
final
min → num
最小值
final
onValueChanged → ValueChanged<num>?
Value值改变回调
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
step → num
步进，每次+/- Value变化数值，必须是正数
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _CounterState
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