Struct CalendarHeaderConfig 

pub struct CalendarHeaderConfig {
    pub prev_double: Option<WidgetId>,
    pub prev: Option<WidgetId>,
    pub title: WidgetId,
    pub next: Option<WidgetId>,
    pub next_double: Option<WidgetId>,
}

Pre-built header components passed to make_header. All five slots are pre-built widgets; the recipe lays them out into a horizontal strip. When show_navigation = false on the calendar, every arrow slot is None and the recipe still returns a row containing just the title.

Fields

prev_double: Option<WidgetId>

Far-left “step coarser” arrow (« — prev year in Days mode, prev decade in Months mode, etc.).

prev: Option<WidgetId>

Single-step prev arrow (‹).

title: WidgetId

Center title — a Button whose label reactively reflects the visible month / year / decade and whose on_activate demotes the calendar mode.

next: Option<WidgetId>

Single-step next arrow (›).

next_double: Option<WidgetId>

Far-right “step coarser” next arrow (»).