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|
use iced::theme;
use iced::widget::{
button, column, horizontal_space, row, scrollable, text, text_input,
};
use iced::{Element, Length, Sandbox, Settings};
use iced_lazy::lazy;
use std::collections::HashSet;
pub fn main() -> iced::Result {
App::run(Settings::default())
}
struct App {
options: HashSet<String>,
input: String,
order: Order,
}
impl Default for App {
fn default() -> Self {
Self {
options: ["Foo", "Bar", "Baz", "Qux", "Corge", "Waldo", "Fred"]
.into_iter()
.map(ToString::to_string)
.collect(),
input: Default::default(),
order: Order::Ascending,
}
}
}
#[derive(Debug, Clone)]
enum Message {
InputChanged(String),
ToggleOrder,
DeleteOption(String),
AddOption(String),
}
impl Sandbox for App {
type Message = Message;
fn new() -> Self {
Self::default()
}
fn title(&self) -> String {
String::from("Cached - Iced")
}
fn update(&mut self, message: Message) {
match message {
Message::InputChanged(input) => {
self.input = input;
}
Message::ToggleOrder => {
self.order = match self.order {
Order::Ascending => Order::Descending,
Order::Descending => Order::Ascending,
}
}
Message::AddOption(option) => {
self.options.insert(option);
self.input.clear();
}
Message::DeleteOption(option) => {
self.options.remove(&option);
}
}
}
fn view(&self) -> Element<Message> {
let options = lazy((&self.order, self.options.len()), || {
let mut options: Vec<_> = self.options.iter().collect();
options.sort_by(|a, b| match self.order {
Order::Ascending => a.to_lowercase().cmp(&b.to_lowercase()),
Order::Descending => b.to_lowercase().cmp(&a.to_lowercase()),
});
column(
options
.into_iter()
.map(|option| {
row![
text(option),
horizontal_space(Length::Fill),
button("Delete")
.on_press(Message::DeleteOption(
option.to_string(),
),)
.style(theme::Button::Destructive)
]
.into()
})
.collect(),
)
.spacing(10)
});
column![
scrollable(options).height(Length::Fill),
row![
text_input(
"Add a new option",
&self.input,
Message::InputChanged,
)
.on_submit(Message::AddOption(self.input.clone())),
button(text(format!("Toggle Order ({})", self.order)))
.on_press(Message::ToggleOrder)
]
.spacing(10)
]
.spacing(20)
.padding(20)
.into()
}
}
#[derive(Debug, Hash)]
enum Order {
Ascending,
Descending,
}
impl std::fmt::Display for Order {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(
f,
"{}",
match self {
Self::Ascending => "Ascending",
Self::Descending => "Descending",
}
)
}
}
|
