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https://github.com/FliegendeWurst/cursive.git
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7b579a7d54
Now the `OnEventView.on_pre_event_inner()` calls return `Some(EventResult::Consumed(Some(Callback)))` instead of `Some(EventResult::Consumed(None))`. This follows the guidelines from documentation of methods returning a `Callback`, which say that it should be ran on the `Cursive`. While in this example this doesn't make a difference, the previous version created confusion for new users who might not realize you can pass the `Callback`s to the `Cursive` this way.
59 lines
1.8 KiB
Rust
59 lines
1.8 KiB
Rust
use cursive::align::HAlign;
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use cursive::event::EventResult;
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use cursive::traits::*;
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use cursive::views::{Dialog, OnEventView, SelectView, TextView};
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use cursive::Cursive;
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// We'll use a SelectView here.
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//
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// A SelectView is a scrollable list of items, from which the user can select
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// one.
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fn main() {
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let mut select = SelectView::new()
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// Center the text horizontally
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.h_align(HAlign::Center)
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// Use keyboard to jump to the pressed letters
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.autojump();
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// Read the list of cities from separate file, and fill the view with it.
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// (We include the file at compile-time to avoid runtime read errors.)
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let content = include_str!("../../assets/cities.txt");
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select.add_all_str(content.lines());
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// Sets the callback for when "Enter" is pressed.
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select.set_on_submit(show_next_window);
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// Let's override the `j` and `k` keys for navigation
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let select = OnEventView::new(select)
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.on_pre_event_inner('k', |s, _| {
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let cb = s.select_up(1);
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Some(EventResult::Consumed(Some(cb)))
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})
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.on_pre_event_inner('j', |s, _| {
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let cb = s.select_down(1);
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Some(EventResult::Consumed(Some(cb)))
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});
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let mut siv = cursive::default();
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// Let's add a ResizedView to keep the list at a reasonable size
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// (it can scroll anyway).
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siv.add_layer(
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Dialog::around(select.scrollable().fixed_size((20, 10)))
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.title("Where are you from?"),
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);
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siv.run();
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}
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// Let's put the callback in a separate function to keep it clean,
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// but it's not required.
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fn show_next_window(siv: &mut Cursive, city: &str) {
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siv.pop_layer();
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let text = format!("{} is a great city!", city);
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siv.add_layer(
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Dialog::around(TextView::new(text)).button("Quit", |s| s.quit()),
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);
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}
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