Struct Checkbox 

pub struct Checkbox { /* private fields */ }

A checkbox widget with a label and toggleable state.

Press Space or Enter to toggle. Renders as [✓] label when checked and [ ] label when unchecked.

Implementations

impl Checkbox

pub fn new(label: impl Into<Text>) -> Self

Creates a new unchecked checkbox with the given label.

pub fn checked(self) -> Self

Builder: sets the initial checked state.

pub fn style(self, style: Style) -> Self

Builder: sets the default style.

pub fn checked_style(self, style: Style) -> Self

Builder: sets the checked-state style.

pub fn is_checked(&self) -> bool

Returns whether the checkbox is currently checked.

pub fn set_checked(&mut self, checked: bool, cx: &mut EventCx<'_>)

Sets the checked state.

pub fn toggle(&mut self, cx: &mut EventCx<'_>)

Toggles the checked state.

Trait Implementations

impl Component for Checkbox

fn render(&self, cx: &mut RenderCx<'_>)

渲染组件内容

fn measure(&self, _constraint: Constraint, _cx: &mut MeasureCx) -> Size

测量组件在给定约束下的自适应尺寸

fn event(&mut self, event: &Event, cx: &mut EventCx<'_>)

处理事件（可选实现）

fn layout(&mut self, rect: Rect, _cx: &mut LayoutCx<'_>)

布局回调——组件在此计算子节点 rect 并调用 child.layout()

fn focusable(&self) -> bool

是否可聚焦（Tab 导航会跳过不可聚焦的组件）

fn style(&self) -> Style

返回组件样式（可选实现）

fn mount(&mut self, _cx: &mut EventCx<'_>)

首次挂载（初始化后调用）

fn unmount(&mut self, _cx: &mut EventCx<'_>)

从树卸载（退出前调用）

fn update(&mut self, _cx: &mut EventCx<'_>)

每次事件分发前调用

fn type_name(&self) -> &str

组件类型名（用于样式表类型选择器匹配）

fn id(&self) -> Option<&str>

组件 ID（用于样式表 #id 选择器匹配）

fn class(&self) -> Option<&str>

组件 class（用于样式表 .class 选择器匹配）

fn for_each_child(&self, _f: &mut dyn FnMut(&Node))

遍历子节点（为焦点系统等提供统一的树遍历接口）

fn for_each_child_mut(&mut self, _f: &mut dyn FnMut(&mut Node))

遍历子节点（可变版本）