Struct SettingsCategoryProvider 

pub struct SettingsCategoryProvider;

Navigation provider for settings categories.

This provider implements the NavigationProvider trait for the flat category hierarchy used in the settings editor. Since categories don’t have a parent-child relationship, this provider treats all categories as independent root-level items.

Trait Implementations

impl Default for SettingsCategoryProvider

fn default() -> SettingsCategoryProvider

Returns the “default value” for a type.

impl NavigationProvider for SettingsCategoryProvider

fn estimate_line_count( &self, _key: &Self::LevelKey, _data: &Self::LevelData, ) -> usize

Return 1 here, as the amount of categories fits on 1 line

type LevelKey = Category

Key that identifies a level in the stack.

type LevelData = ()

Data needed to render a level.

type Bar = CategoryNavigationBar

Concrete view used to render a level.

fn parent(&self, _current: &Self::LevelKey) -> Option<Self::LevelKey>

Returns the parent key, if any.

fn is_ancestor( &self, ancestor: &Self::LevelKey, descendant: &Self::LevelKey, ) -> bool

Returns true if ancestor is an ancestor of descendant.

fn is_root(&self, _key: &Self::LevelKey, _context: &Context) -> bool

Returns true if the key is the root of the stack.

fn fetch_level_data( &self, _key: &Self::LevelKey, _context: &mut Context, ) -> Self::LevelData

Fetch the data for a level.

fn create_bar(&self, rect: Rectangle, key: &Self::LevelKey) -> Self::Bar

Creates a new empty bar for the given level key.

fn bar_key(&self, bar: &Self::Bar) -> Self::LevelKey

Returns the key that is currently displayed by a bar.

fn update_bar( &self, bar: &mut Self::Bar, _data: &Self::LevelData, selected: &Self::LevelKey, fonts: &mut Fonts, )

Update bar content using only fonts (no context borrowing).

fn update_bar_selection(&self, bar: &mut Self::Bar, selected: &Self::LevelKey)

Update bar selection when the content is unchanged.

fn resize_bar_by( &self, bar: &mut Self::Bar, delta_y: i32, fonts: &mut Fonts, ) -> i32

Apply a vertical resize delta to a bar.

fn shift_bar(&self, bar: &mut Self::Bar, delta: Point)

Shift a bar by a delta.

fn selected_leaf_key(&self, selected: &Self::LevelKey) -> Self::LevelKey

Returns the key to consider “selected”.

fn leaf_for_bar_traversal( &self, selected: &Self::LevelKey, _context: &Context, ) -> Self::LevelKey

Returns the starting key for bar traversal.