Struct ThemeSwitcher 

pub struct ThemeSwitcher<'a> { /* private fields */ }

A drop-in picker for the four built-in elegance themes.

Renders a small Select of the four built-in themes and — by default — installs the chosen theme into the context each frame. Bind it to a BuiltInTheme held anywhere in your app state.

let mut theme = BuiltInTheme::Slate;
ui.add(ThemeSwitcher::new(&mut theme));

Installation

By default the widget calls Theme::install on the selected theme on every frame. If your app already installs a theme elsewhere (for instance from a larger preference store), call ThemeSwitcher::auto_install(false) to suppress that.

Implementations

impl<'a> ThemeSwitcher<'a>

pub fn new(current: &'a mut BuiltInTheme) -> Self

Create a switcher bound to a mutable BuiltInTheme slot.

pub fn id_salt(self, id_salt: impl Hash) -> Self

Override the id salt. Only needed if multiple switchers coexist in the same UI.

pub fn width(self, width: f32) -> Self

Override the switcher width in points. Default: 110.0.

pub fn auto_install(self, auto_install: bool) -> Self

Whether to call Theme::install on the selected theme every frame. Default: true.

Set to false if the caller installs a theme elsewhere and just wants the picker UI.

Trait Implementations

impl<'a> Debug for ThemeSwitcher<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Widget for ThemeSwitcher<'_>

fn ui(self, ui: &mut Ui) -> Response

Allocate space, interact, paint, and return a Response.