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|
use iced::{
button, image, Align, Application, Background, Button, Color, Column,
Command, Container, Element, HorizontalAlignment, Image, Length, Row,
Settings, Text,
};
use serde::Deserialize;
pub fn main() {
Example::run(Settings::default())
}
#[derive(Default)]
struct Example {
cats_button: button::State,
dogs_button: button::State,
image: Option<image::Handle>,
state: State,
}
enum State {
Idle,
Loading(Pet),
Error(LoadError),
}
impl Default for State {
fn default() -> State {
State::Idle
}
}
#[derive(Debug, Clone)]
enum Message {
PetChosen(Pet),
ImageLoaded(Result<image::Handle, LoadError>),
}
#[derive(Debug, Clone, Copy)]
enum Pet {
Cat,
Dog,
}
impl Application for Example {
type Message = Message;
fn new() -> (Self, Command<Message>) {
(Self::default(), Command::none())
}
fn title(&self) -> String {
String::from("Image viewer - Iced")
}
fn update(&mut self, message: Message) -> Command<Message> {
match message {
Message::PetChosen(pet) => match self.state {
State::Loading(_) => Command::none(),
_ => {
self.state = State::Loading(pet);
Command::perform(get_pet_image(pet), Message::ImageLoaded)
}
},
Message::ImageLoaded(Ok(image)) => {
self.image = Some(image);
self.state = State::Idle;
Command::none()
}
Message::ImageLoaded(Err(error)) => {
self.state = State::Error(error);
Command::none()
}
}
}
fn view(&mut self) -> Element<Message> {
let Example {
cats_button,
dogs_button,
state,
image,
} = self;
let choose: Element<_> = match state {
State::Loading(pet) => Text::new(format!(
"Getting your {} ready...",
match pet {
Pet::Cat => "cat",
Pet::Dog => "dog",
}
))
.width(Length::Shrink)
.color([0.4, 0.4, 0.4])
.into(),
_ => Row::new()
.width(Length::Shrink)
.spacing(20)
.push(
button(
cats_button,
"Cats",
Color::from_rgb8(0x89, 0x80, 0xF5),
)
.on_press(Message::PetChosen(Pet::Cat)),
)
.push(
button(
dogs_button,
"Dogs",
Color::from_rgb8(0x21, 0xD1, 0x9F),
)
.on_press(Message::PetChosen(Pet::Dog)),
)
.into(),
};
let content = Column::new()
.width(Length::Shrink)
.padding(20)
.spacing(20)
.align_items(Align::Center)
.push(
Text::new("What do you want to see?")
.width(Length::Shrink)
.horizontal_alignment(HorizontalAlignment::Center)
.size(40),
)
.push(choose);
let content = if let Some(image) = image {
content.push(Image::new(image.clone()).height(Length::Fill))
} else {
content
};
Container::new(content)
.width(Length::Fill)
.height(Length::Fill)
.center_x()
.center_y()
.into()
}
}
fn button<'a, Message>(
state: &'a mut button::State,
label: &str,
color: Color,
) -> Button<'a, Message> {
Button::new(
state,
Text::new(label)
.horizontal_alignment(HorizontalAlignment::Center)
.color(Color::WHITE)
.size(30),
)
.padding(10)
.min_width(100)
.border_radius(10)
.background(Background::Color(color))
}
#[derive(Debug, Deserialize)]
pub struct SearchResult {
url: String,
}
#[derive(Debug, Clone)]
enum LoadError {
RequestError,
}
async fn get_pet_image(pet: Pet) -> Result<image::Handle, LoadError> {
use std::io::Read;
let search = match pet {
Pet::Cat => "https://api.thecatapi.com/v1/images/search?limit=1&mime_types=jpg,png",
Pet::Dog => "https://api.thedogapi.com/v1/images/search?limit=1&mime_types=jpg,png",
};
let results: Vec<SearchResult> = reqwest::get(search)?.json()?;
let url = &results.first().unwrap().url;
let mut image = reqwest::get(url)?;
let mut bytes = Vec::new();
image
.read_to_end(&mut bytes)
.map_err(|_| LoadError::RequestError)?;
Ok(image::Handle::from_bytes(bytes))
}
impl From<reqwest::Error> for LoadError {
fn from(error: reqwest::Error) -> LoadError {
dbg!(&error);
LoadError::RequestError
}
}
|
