64 lines
1.7 KiB
Rust
64 lines
1.7 KiB
Rust
pub mod event;
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use tui_tree_widget::{flatten, identifier, TreeItem, TreeState};
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pub struct StatefulTree<'a> {
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pub state: TreeState,
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pub items: Vec<TreeItem<'a>>,
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}
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impl<'a> StatefulTree<'a> {
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#[allow(dead_code)]
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pub fn new() -> StatefulTree<'a> {
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StatefulTree {
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state: TreeState::default(),
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items: Vec::new(),
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}
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}
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pub fn with_items(items: Vec<TreeItem<'a>>) -> StatefulTree<'a> {
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StatefulTree {
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state: TreeState::default(),
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items,
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}
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}
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fn move_up_down(&mut self, down: bool) {
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let visible = flatten(&self.state.get_all_opened(), &self.items);
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let current_identifier = self.state.selected();
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let current_index = visible
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.iter()
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.position(|o| o.identifier == current_identifier);
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let new_index = current_index.map_or(0, |current_index| {
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if down {
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current_index.saturating_add(1)
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} else {
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current_index.saturating_sub(1)
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}
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.min(visible.len() - 1)
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});
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let new_identifier = visible.get(new_index).unwrap().identifier.to_owned();
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self.state.select(new_identifier);
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}
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pub fn next(&mut self) {
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self.move_up_down(true);
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}
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pub fn previous(&mut self) {
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self.move_up_down(false);
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}
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pub fn close(&mut self) {
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let selected = self.state.selected();
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if !self.state.close(&selected) {
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let (head, _) = identifier::get_without_leaf(&selected);
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self.state.select(head);
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}
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}
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pub fn open(&mut self) {
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self.state.open(self.state.selected());
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}
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}
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