pub fn use_theme(
id: impl Into<SharedString>,
cx: &mut App,
) -> Result<(), UnknownThemeError>Expand description
Activates one of the registered themes by id ("light", "dark", custom)
and schedules every open window to repaint.
An unknown id is an error, not a panic: the active theme is left unchanged,
no window repaints, and the rejected id comes back in
UnknownThemeError.