Struct scl_gui_widgets::widgets::MenuItem

pub struct MenuItem<D> { /* private fields */ }

一个左侧显示内容，右侧显示勾选框或文本内容的组件

如果数据源是 bool 类型的话，组件右侧会变成勾选框，且在没有被禁用的情况下可以开关并更新数据

如果数据源是 String 类型的话，组件右侧会变成普通文本并显示数据的文本

Implementations

impl<D: Data> MenuItem<D>

pub fn new(title: impl Into<LabelText<D>>) -> Self

以左侧标签文本为参数创建此组件

Trait Implementations

impl Widget<()> for MenuItem<()>

默认实现：右侧是一个箭头

fn event( &mut self, _ctx: &mut EventCtx<'_, '_>, _event: &Event, _data: &mut (), _env: &Env )

Handle an event.

fn lifecycle( &mut self, _ctx: &mut LifeCycleCtx<'_, '_>, _event: &LifeCycle, _data: &(), _env: &Env )

Handle a life cycle notification.

fn update( &mut self, _ctx: &mut UpdateCtx<'_, '_>, _old_data: &(), _data: &(), _env: &Env )

Update the widget’s appearance in response to a change in the app’s [Data] or [Env].

fn layout( &mut self, _ctx: &mut LayoutCtx<'_, '_>, _bc: &BoxConstraints, _data: &(), _env: &Env ) -> Size

Compute layout.

fn paint(&mut self, _ctx: &mut PaintCtx<'_, '_, '_>, _data: &(), _env: &Env)

Paint the widget appearance.

fn compute_max_intrinsic( &mut self, axis: Axis, ctx: &mut LayoutCtx<'_, '_>, bc: &BoxConstraints, data: &T, env: &Env ) -> f64

Computes max intrinsic/preferred dimension of a widget on the provided axis.

impl Widget<String> for MenuItem<String>

如果传入的是字符串，则右侧显示其为副标签

fn event( &mut self, ctx: &mut EventCtx<'_, '_>, event: &Event, data: &mut String, env: &Env )

Handle an event.

fn lifecycle( &mut self, ctx: &mut LifeCycleCtx<'_, '_>, event: &LifeCycle, data: &String, env: &Env )

Handle a life cycle notification.

fn update( &mut self, ctx: &mut UpdateCtx<'_, '_>, old_data: &String, data: &String, env: &Env )

Update the widget’s appearance in response to a change in the app’s [Data] or [Env].

fn layout( &mut self, ctx: &mut LayoutCtx<'_, '_>, bc: &BoxConstraints, data: &String, env: &Env ) -> Size

Compute layout.

fn paint(&mut self, ctx: &mut PaintCtx<'_, '_, '_>, data: &String, env: &Env)

Paint the widget appearance.

fn compute_max_intrinsic( &mut self, axis: Axis, ctx: &mut LayoutCtx<'_, '_>, bc: &BoxConstraints, data: &T, env: &Env ) -> f64

Computes max intrinsic/preferred dimension of a widget on the provided axis.

impl Widget<bool> for MenuItem<bool>

如果传入的是布尔值，则右侧显示为勾选框

fn event( &mut self, ctx: &mut EventCtx<'_, '_>, event: &Event, data: &mut bool, env: &Env )

Handle an event.

fn lifecycle( &mut self, ctx: &mut LifeCycleCtx<'_, '_>, event: &LifeCycle, data: &bool, env: &Env )

Handle a life cycle notification.

fn update( &mut self, ctx: &mut UpdateCtx<'_, '_>, _old_data: &bool, data: &bool, env: &Env )

Update the widget’s appearance in response to a change in the app’s [Data] or [Env].

fn layout( &mut self, ctx: &mut LayoutCtx<'_, '_>, bc: &BoxConstraints, data: &bool, env: &Env ) -> Size

Compute layout.

fn paint(&mut self, ctx: &mut PaintCtx<'_, '_, '_>, data: &bool, env: &Env)

Paint the widget appearance.

fn compute_max_intrinsic( &mut self, axis: Axis, ctx: &mut LayoutCtx<'_, '_>, bc: &BoxConstraints, data: &T, env: &Env ) -> f64

Computes max intrinsic/preferred dimension of a widget on the provided axis.