use cursive::{event::Key, menu, traits::*, views::Dialog};
use std::sync::atomic::{AtomicUsize, Ordering};
// This examples shows how to configure and use a menubar at the top of the
// application.
fn main() {
let mut siv = cursive::default();
// We'll use a counter to name new files.
let counter = AtomicUsize::new(1);
// The menubar is a list of (label, menu tree) pairs.
siv.menubar()
// We add a new "File" tree
.add_subtree(
"File",
menu::Tree::new()
// Trees are made of leaves, with are directly actionable...
.leaf("New", move |s| {
// Here we use the counter to add an entry
// in the list of "Recent" items.
let i = counter.fetch_add(1, Ordering::Relaxed);
let filename = format!("New {}", i);
s.menubar()
.find_subtree("File")
.unwrap()
.find_subtree("Recent")
.unwrap()
.insert_leaf(0, filename, |_| ());
s.add_layer(Dialog::info("New file!"));
})
// ... and of sub-trees, which open up when selected.
.subtree(
"Recent",
// The `.with()` method can help when running loops
// within builder patterns.
menu::Tree::new().with(|tree| {
for i in 1..100 {
// We don't actually do anything here,
// but you could!
tree.add_item(menu::Item::leaf(format!("Item {}", i), |_| ()).with(|s| {
if i % 5 == 0 { s.disable(); }
}))
}
}),
)
// Delimiter are simple lines between items,
// and cannot be selected.
.delimiter()
.with(|tree| {
for i in 1..10 {
tree.add_leaf(format!("Option {}", i), |_| ());
}
}),
)
.add_subtree(
"Help",
menu::Tree::new()
.subtree(
"Help",
menu::Tree::new()
.leaf("General", |s| {
s.add_layer(Dialog::info("Help message!"))
})
.leaf("Online", |s| {
let text = "Google it yourself!\n\
Kids, these days...";
s.add_layer(Dialog::info(text))
}),
)
.leaf("About", |s| {
s.add_layer(Dialog::info("Cursive v0.0.0"))
}),
)
.add_delimiter()
.add_leaf("Quit", |s| s.quit());
// When `autohide` is on (default), the menu only appears when active.
// Turning it off will leave the menu always visible.
// Try uncommenting this line!
// siv.set_autohide_menu(false);
siv.add_global_callback(Key::Esc, |s| s.select_menubar());
siv.add_layer(Dialog::text("Hit <Esc> to show the menu!"));
siv.run();
}