Struct TreeViewState 

pub struct TreeViewState {
    pub selected_path: Option<Vec<usize>>,
    pub expanded: HashSet<Vec<usize>>,
    pub offset: usize,
}

Available on crate feature tree only.

Tree view state (for StatefulWidget pattern)

Fields

selected_path: Option<Vec<usize>>

Currently selected node path (indices from root)

expanded: HashSet<Vec<usize>>

Set of expanded node paths

offset: usize

Vertical scroll offset

Implementations

impl TreeViewState

pub fn new() -> Self

pub fn select(&mut self, path: Vec<usize>)

Set the selected node path

pub fn clear_selection(&mut self)

Clear selection

pub fn toggle_expansion(&mut self, path: Vec<usize>)

Toggle expansion of a node at the given path

pub fn is_expanded(&self, path: &[usize]) -> bool

Check if a node is expanded

pub fn expand(&mut self, path: Vec<usize>)

Expand a node

pub fn collapse(&mut self, path: Vec<usize>)

Collapse a node

pub fn expand_all<T>(&mut self, nodes: &[TreeNode<T>])

Expand all nodes

pub fn collapse_all(&mut self)

Collapse all nodes

Trait Implementations

impl Clone for TreeViewState

fn clone(&self) -> TreeViewState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TreeViewState

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

Formats the value using the given formatter.

impl Default for TreeViewState

fn default() -> TreeViewState

Returns the “default value” for a type.