MiuixDropdownImpl class

下拉选项行的渲染实现。对应 Kotlin DropdownImpl（含旧 SpinnerItemImpl）。

本组件仅负责单行的呈现与点击；弹层、触发器与级联子菜单在独立文件中。

Inheritance

Constructors

MiuixDropdownImpl({Key? key, required MiuixDropdownItem item, required int optionSize, required bool isSelected, required int index, required ValueChanged<int> onSelectedIndexChange, MiuixDropdownColors? dropdownColors, bool? enabled, bool dialogMode = false, bool hasSubmenu = false, bool? isFirst, bool? isLast}): 以 MiuixDropdownItem 渲染一行。
const
MiuixDropdownImpl.text({Key? key, required String text, required int optionSize, required bool isSelected, required int index, required ValueChanged<int> onSelectedIndexChange, MiuixDropdownColors? dropdownColors, bool enabled = true, bool dialogMode = false}): 文本便捷构造，对应 Kotlin 第二个 DropdownImpl(text, ...) 重载。

dialogMode → bool: 对话框模式。
final
dropdownColors → MiuixDropdownColors?: 行配色。null 时取 MiuixDropdownDefaults.dropdownColors。
final
enabled → bool: 是否可点击。默认取 item.enabled。
no setter
hashCode → int: The hash code for this object.
no setterinherited
hasSubmenu → bool: 是否作为子菜单触发器。
final
index → int: 当前项下标。
final
isFirst → bool: 是否为整个弹层的首行。默认 index == 0。
no setter
isLast → bool: 是否为整个弹层的末行。默认 index == optionSize - 1。
no setter
isSelected → bool: 是否选中。
final
item → MiuixDropdownItem: 当前选项的数据。
final
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
onSelectedIndexChange → ValueChanged<int>: 选中回调，以 index 触发。
final
optionSize → int: 选项总数。
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

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