moho 0.0.9

Barebones Rust Game Library
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

mod state;

pub use self::state::State;

use sdl2::EventPump as SdlEventPump;
use sdl2::event::Event;

struct EventGenerator<E> {
    event_pump: E,
}

impl<E> EventGenerator<E> {
    fn new(event_pump: E) -> Self {
        EventGenerator { event_pump: event_pump }
    }

    fn iter(&mut self) -> EventIterator<E> {
        EventIterator { event_pump: &mut self.event_pump }
    }
}

struct EventIterator<'a, E: 'a> {
    event_pump: &'a mut E,
}

impl<'a, E: EventPump> Iterator for EventIterator<'a, E> {
    type Item = Event;

    fn next(&mut self) -> Option<Event> {
        self.event_pump.poll_event()
    }
}

pub trait EventPump {
    fn poll_event(&mut self) -> Option<Event>;
}

impl EventPump for SdlEventPump {
    fn poll_event(&mut self) -> Option<Event> {
        self.poll_event()
    }
}

pub struct Manager<P: EventPump> {
    pub current: State,
    event_generator: EventGenerator<P>,
}

impl<P: EventPump> Manager<P> {
    pub fn new(event_pump: P) -> Manager<P> {
        Manager {
            current: State::new(),
            event_generator: EventGenerator::new(event_pump),
        }
    }

    pub fn update(&mut self) -> &State {
        self.current.update(&mut self.event_generator);
        &self.current
    }
}