Enum TreeChange 

pub enum TreeChange {
    NodeInserted {
        parent: Option<NodeId>,
        index: usize,
        node: NodeId,
    },
    NodeRemoved {
        parent: Option<NodeId>,
        node: NodeId,
    },
    NodeMoved {
        node: NodeId,
        old_parent: Option<NodeId>,
        new_parent: Option<NodeId>,
        new_index: usize,
    },
    NodeUpdated {
        node: NodeId,
    },
    Reset,
}

Describes a mutation to a tree structure. Emitted by TreeModel<T> automatically.

Variants

NodeInserted

A node was inserted as a child of parent at the given index. parent is None for root-level insertions.

Fields

parent: Option<NodeId>

index: usize

node: NodeId

NodeRemoved

A node (and its entire subtree) was removed. parent is None if it was a root-level node.

Fields

parent: Option<NodeId>

node: NodeId

NodeMoved

A node was moved to a new parent at the given index.

Fields

node: NodeId

old_parent: Option<NodeId>

new_parent: Option<NodeId>

new_index: usize

NodeUpdated

A node’s data was updated in place.

Fields

node: NodeId

Reset

The entire tree was replaced. Consumers should discard all state and rebuild.

Trait Implementations

impl Clone for TreeChange

fn clone(&self) -> TreeChange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TreeChange

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

Formats the value using the given formatter.

impl Eq for TreeChange

impl PartialEq for TreeChange

fn eq(&self, other: &TreeChange) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for TreeChange