1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113

use iced::{
    pick_list, scrollable, Align, Container, Element, Length, PickList,
    Sandbox, Scrollable, Settings, Space, Text,
};

pub fn main() {
    Example::run(Settings::default())
}

#[derive(Default)]
struct Example {
    scroll: scrollable::State,
    pick_list: pick_list::State<Language>,
    selected_language: Language,
}

#[derive(Debug, Clone, Copy)]
enum Message {
    LanguageSelected(Language),
}

impl Sandbox for Example {
    type Message = Message;

    fn new() -> Self {
        Self::default()
    }

    fn title(&self) -> String {
        String::from("Pick list - Iced")
    }

    fn update(&mut self, message: Message) {
        match message {
            Message::LanguageSelected(language) => {
                self.selected_language = language;
            }
        }
    }

    fn view(&mut self) -> Element<Message> {
        let pick_list = PickList::new(
            &mut self.pick_list,
            &Language::ALL[..],
            Some(self.selected_language),
            Message::LanguageSelected,
        );

        let mut content = Scrollable::new(&mut self.scroll)
            .width(Length::Fill)
            .align_items(Align::Center)
            .spacing(10)
            .push(Space::with_height(Length::Units(600)))
            .push(Text::new("Which is your favorite language?"))
            .push(pick_list);

        content = content.push(Space::with_height(Length::Units(600)));

        Container::new(content)
            .width(Length::Fill)
            .height(Length::Fill)
            .center_x()
            .center_y()
            .into()
    }
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum Language {
    Rust,
    Elm,
    Ruby,
    Haskell,
    C,
    Javascript,
    Other,
}

impl Language {
    const ALL: [Language; 7] = [
        Language::C,
        Language::Elm,
        Language::Ruby,
        Language::Haskell,
        Language::Rust,
        Language::Javascript,
        Language::Other,
    ];
}

impl Default for Language {
    fn default() -> Language {
        Language::Rust
    }
}

impl std::fmt::Display for Language {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(
            f,
            "{}",
            match self {
                Language::Rust => "Rust",
                Language::Elm => "Elm",
                Language::Ruby => "Ruby",
                Language::Haskell => "Haskell",
                Language::C => "C",
                Language::Javascript => "Javascript",
                Language::Other => "Some other language",
            }
        )
    }
}