Struct SelectionService 

pub struct SelectionService { /* private fields */ }

Selection service for managing drawing selection state

Implementations

impl SelectionService

pub fn new() -> Self

Create a new selection service

pub fn select(&mut self, id: usize) -> bool

Select a single drawing (deselects all others unless multi-select is active)

Returns true if selection changed.

pub fn toggle(&mut self, id: usize) -> bool

Toggle selection of a drawing (for Ctrl+click behavior)

Returns true if selection changed.

pub fn deselect(&mut self, id: usize) -> bool

Deselect a specific drawing

Returns true if the drawing was selected.

pub fn deselect_all(&mut self) -> bool

Deselect all drawings

Returns true if any drawings were selected.

pub fn is_selected(&self, id: usize) -> bool

Check if a specific drawing is selected

pub fn has_selection(&self) -> bool

Check if any drawings are selected

pub fn primary(&self) -> Option<usize>

Get the primary (most recently selected) drawing ID

pub fn selected_ids(&self) -> impl Iterator<Item = usize> + '_

Get all selected drawing IDs

pub fn selection_count(&self) -> usize

Get count of selected drawings

pub fn set_multi_select_mode(&mut self, enabled: bool)

Enable/disable multi-select mode

pub fn is_multi_select_mode(&self) -> bool

Check if multi-select mode is active

pub fn select_all(&mut self, ids: impl IntoIterator<Item = usize>)

Select all drawings from a list of IDs

pub fn prune(&mut self, existing_ids: &HashSet<usize>)

Remove selection for drawings that no longer exist

Call this after deleting drawings to clean up stale selections.

pub fn single_selection(&self) -> Option<usize>

Get single selected drawing ID (legacy compatibility)

Returns None if multiple drawings are selected.

Trait Implementations

impl Clone for SelectionService

fn clone(&self) -> SelectionService

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SelectionService

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

Formats the value using the given formatter.

impl Default for SelectionService

fn default() -> SelectionService

Returns the “default value” for a type.