Struct CategoryNavigationBar 

pub struct CategoryNavigationBar {
    id: Id,
    pub rect: Rectangle,
    children: Vec<Box<dyn View>>,
    pub selected: Category,
}

Horizontal navigation bar displaying category tabs.

This component shows all available settings categories as horizontal tabs, wrapping onto additional rows when the categories no longer fit on a single line. The selected category is visually highlighted. The bar’s height is determined by SettingsCategoryProvider::estimate_line_count, which must match the number of rows required.

Structure

┌─────────────────────────────────────────────┐
│ [General] [Libraries] [Intermissions] ...   │
│ [OtherCategory] ...                         │
└─────────────────────────────────────────────┘

Fields

id: Id

rect: Rectangle

children: Vec<Box<dyn View>>

selected: Category

Implementations

impl CategoryNavigationBar

pub fn new(rect: Rectangle, selected: Category) -> Self

pub fn update_content(&mut self, selected: Category, fonts: &mut Fonts)

fn build_category_buttons( rect: Rectangle, selected: Category, fonts: &mut Fonts, ) -> Vec<Box<dyn View>>

Layout all category buttons in rows, distributing vertical space evenly.

This method implements a two-pass layout algorithm:

Pass 1: Horizontal measurement

Each category is measured to determine its button width. Categories are packed left-to-right; when a button doesn’t fit, a new row begins.

Pass 2: Vertical distribution

Available vertical space is divided evenly using the baseline method (same as DirectoriesBar). For row_count rows, the total non-text space is divided into row_count + 1 gaps. Each row claims big_half of the gap above it and small_half of the gap below. This ensures consistent centering regardless of the number of rows.

Child views:

Background fillers are added to cover all non-button regions (top strip, left margin per row, trailing space per row, bottom strip) to prevent stale framebuffer content from showing through.

pub fn update_selection(&mut self, selected: Category, fonts: &mut Fonts)

pub fn resize_by(&mut self, _delta_y: i32, _fonts: &mut Fonts) -> i32

pub fn shift(&mut self, delta: Point)

Trait Implementations

impl View for CategoryNavigationBar

fn handle_event( &mut self, _evt: &Event, _hub: &Hub, _bus: &mut Bus, _rq: &mut RenderQueue, _context: &mut Context, ) -> bool

fn render( &self, _fb: &mut dyn Framebuffer, _rect: Rectangle, _fonts: &mut Fonts, )

fn rect(&self) -> &Rectangle

fn rect_mut(&mut self) -> &mut Rectangle

fn children(&self) -> &Vec<Box<dyn View>>

fn children_mut(&mut self) -> &mut Vec<Box<dyn View>>

fn id(&self) -> Id

fn render_rect(&self, _rect: &Rectangle) -> Rectangle

fn resize( &mut self, rect: Rectangle, _hub: &Hub, _rq: &mut RenderQueue, _context: &mut Context, )

fn child(&self, index: usize) -> &dyn View

fn child_mut(&mut self, index: usize) -> &mut dyn View

fn len(&self) -> usize

fn might_skip(&self, _evt: &Event) -> bool

fn might_rotate(&self) -> bool

fn is_background(&self) -> bool

fn view_id(&self) -> Option<ViewId>