Struct zng_app::widget::node::OffsetUiListObserver

pub struct OffsetUiListObserver<'o>(pub usize, pub &'o mut dyn UiNodeListObserver);

Represents an UiNodeListObserver that applies an offset to all indexes.

This type is useful for implementing UiNodeList that are composed of other lists.

Tuple Fields

0: usize

1: &'o mut dyn UiNodeListObserver

Trait Implementations

impl<'o> UiNodeListObserver for OffsetUiListObserver<'o>

fn is_reset_only(&self) -> bool

Returns true if this observer does not use the item indexes.

fn reset(&mut self)

Called when large or unspecified changes happen to the list.

fn inserted(&mut self, index: usize)

Called when a node is inserted at index.

fn removed(&mut self, index: usize)

Called when a node is removed from index.

fn moved(&mut self, removed_index: usize, inserted_index: usize)

Called when a node is removed from removed_index and re-inserted at inserted_index.