ArcoDropdownButton class

带下拉菜单的按钮组，对应官方 Dropdown.Button。

结构为一个 ArcoButtonGroup：左侧按钮承载 child 与 onPressed，右侧按钮显示 icon（默认「更多」图标）并负责展开下拉。

Inheritance

Constructors

ArcoDropdownButton({Key? key, required Widget droplist, required Widget child, ArcoTriggerPosition position = ArcoTriggerPosition.br, Set<ArcoTriggerType> trigger = const <ArcoTriggerType>{ArcoTriggerType.hover}, ArcoButtonSize size = ArcoButtonSize.medium, ArcoButtonType type = ArcoButtonType.secondary, bool disabled = false, Widget? icon, VoidCallback? onPressed, Duration mouseEnterDelay = const Duration(milliseconds: 400), Duration mouseLeaveDelay = const Duration(milliseconds: 400), ValueChanged<bool>? onVisibleChange, bool? popupVisible, bool defaultPopupVisible = false}): 创建带下拉的按钮组。
const

child → Widget: 左侧按钮内容。
final
defaultPopupVisible → bool: 非受控初始显示状态。
final
disabled → bool: 是否禁用。
final
droplist → Widget: 下拉内容。
final
hashCode → int: The hash code for this object.
no setterinherited
icon → Widget?: 右侧按钮图标，默认「更多」。
final
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
mouseEnterDelay → Duration: 移入延时。
final
mouseLeaveDelay → Duration: 移出延时。
final
onPressed → VoidCallback?: 左侧按钮点击回调（对应官方 onClick）。
final
onVisibleChange → ValueChanged<bool>?: 显示状态变化回调。
final
popupVisible → bool?: 受控显示状态。
final
position → ArcoTriggerPosition: 方位，官方默认 br。
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
size → ArcoButtonSize: 与 ArcoButton 一致的尺寸。
final
trigger → Set<ArcoTriggerType>: 触发方式。
final
type → ArcoButtonType: 与 ArcoButton 一致的类型（对应官方 type="default"，即默认灰底按钮）。
final

build(BuildContext context) → Widget: Describes the part of the user interface represented by this widget.
override
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.
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, int wrapWidth = 65}) → 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