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Add menu tree
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parent
4efd84f311
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63
src/menu.rs
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63
src/menu.rs
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use Cursive;
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use std::rc::Rc;
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use event::Callback;
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#[derive(Default)]
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pub struct MenuTree {
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pub children: Vec<MenuItem>,
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}
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pub enum MenuItem {
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Leaf(String, Rc<Callback>),
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Subtree(String, Box<MenuTree>),
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Delimiter,
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}
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impl MenuTree {
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pub fn new() -> Self {
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Self::default()
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}
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pub fn clear(&mut self) {
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self.children.clear();
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}
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pub fn is_empty(&self) -> bool {
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self.children.is_empty()
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}
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pub fn add_delimiter(&mut self) {
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self.children.push(MenuItem::Delimiter);
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}
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pub fn delimiter(mut self) -> Self {
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self.add_delimiter();
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self
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}
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pub fn leaf<F: 'static + Fn(&mut Cursive)>(&mut self, title: &str, cb: F)
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-> &mut Self {
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self.children.push(MenuItem::Leaf(title.to_string(), Rc::new(Box::new(cb))));
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self
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}
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pub fn add_subtree(&mut self, title: &str, tree: MenuTree) -> &mut Self {
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self.children
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.push(MenuItem::Subtree(title.to_string(), Box::new(tree)));
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self
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}
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pub fn new_subtree(&mut self, title: &str) -> &mut Box<MenuTree> {
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self.add_subtree(title, MenuTree::new());
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match self.children.last_mut().unwrap() {
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&mut MenuItem::Subtree(_, ref mut tree) => tree,
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_ => panic!("??"),
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}
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}
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pub fn subtree(mut self, title: &str, tree: MenuTree) -> Self {
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self.add_subtree(title, tree);
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self
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}
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}
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