ArcoDropdown class

下拉菜单。

在触发节点旁弹出 droplist，默认方位 bl（左下）、触发方式 hover、 进 / 出延时 400ms、位置微调 4px —— 与官方 components/Dropdown 一致。

点击菜单项会自动收起下拉（官方 onClickMenuItem 的默认行为）； 需要保持展开时，把对应 ArcoDroplistItem.keepOpen 设为 true。

ArcoDropdown(
  droplist: ArcoDroplist(
    children: <Widget>[
      ArcoDroplistItem(child: const Text('复制'), onTap: () {}),
      ArcoDroplistItem(child: const Text('删除'), onTap: () {}),
    ],
  ),
  child: ArcoButton(child: const Text('操作')),
)
Inheritance

Constructors

ArcoDropdown({Key? key, required Widget droplist, required Widget child, ArcoTriggerPosition position = ArcoTriggerPosition.bl, Set<ArcoTriggerType> trigger = const <ArcoTriggerType>{ArcoTriggerType.hover}, bool disabled = false, bool unmountOnExit = true, bool? popupVisible, bool defaultPopupVisible = false, ValueChanged<bool>? onVisibleChange, Duration mouseEnterDelay = const Duration(milliseconds: 400), Duration mouseLeaveDelay = const Duration(milliseconds: 400), Duration? enterDuration, Duration? exitDuration, ArcoPopupAlign popupAlign = const ArcoPopupAlign(left: 4, right: 4, top: 4, bottom: 4), bool popupHoverStay = true, bool clickToClose = true, bool? alignPoint, bool escToClose = false, bool autoFitPosition = true})
创建下拉菜单。
const

Properties

alignPoint → bool?
是否跟随鼠标位置；不传时在 contextMenu 触发下自动开启。
final
autoFitPosition → bool
是否自动适配视口。
final
child → Widget
触发节点。
final
clickToClose → bool
点击触发节点是否能关闭。
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，通常传入 ArcoDroplist。
final
enterDuration → Duration?
进场时长。
final
escToClose → bool
是否允许 ESC 关闭。
final
exitDuration → Duration?
退场时长。
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
mouseEnterDelay → Duration
移入延时，默认 400ms。
final
mouseLeaveDelay → Duration
移出延时，默认 400ms。
final
onVisibleChange → ValueChanged<bool>?
显示状态变化回调。
final
popupAlign → ArcoPopupAlign
位置微调，默认四向各 4px。
final
popupHoverStay → bool
鼠标移入下拉框时是否保持显示。
final
popupVisible → bool?
受控显示状态。
final
position → ArcoTriggerPosition
方位，默认 ArcoTriggerPosition.bl。
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
trigger → Set<ArcoTriggerType>
触发方式，默认 hover。
final
unmountOnExit → bool
隐藏时是否销毁浮层。
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<ArcoDropdown>
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, 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

Operators

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