MySelector class

通用选择器浮层

在 triggerContext 所指 Widget 附近弹出一个面板，面板内含可选搜索框、 富格式列表和可选底部区域。

返回 MySelectorResult：

• MySelectorDismissed：用户点击外部或按 Escape，不做任何操作
• MySelectorValueChanged：用户做出了明确操作； value == null 表示主动清除，value != null 表示选中了某项

final result = await MySelector.show<String>(
  triggerContext: context,
  items: [...],
  currentValue: selected,
  showSearch: true,
  clearOption: MySelectorClearOption(label: '不选择'),
  allowReselect: true,
);
switch (result) {
  case MySelectorDismissed(): break;
  case MySelectorValueChanged(:final value):
    state = value; // null = cleared, non-null = selected
}

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

show<T>({required BuildContext triggerContext, required List<MySelectorItem<T>> items, T? currentValue, MySelectorClearOption? clearOption, bool allowReselect = false, bool? showPanelAbove, bool showSearch = false, String searchHint = '搜索…', bool searchFilter(MySelectorItem<T> item, String query)?, Widget itemBuilder(BuildContext context, MySelectorItem<T> item, bool isSelected)?, Widget footerBuilder(BuildContext context, VoidCallback dismiss)?, MySelectorStyle? style}) → Future<MySelectorResult<T>>

弹出选择器面板，返回 MySelectorResult 告知调用方用户的操作意图。