simple/
event.rs

1extern crate sdl2;
2use sdl2::event::Event as SDL_Event;
3pub use sdl2::keyboard::Scancode as Key;
4pub use sdl2::mouse::MouseButton;
5
6/**
7 * Event is an enumeration of the effects that a user can have on a running Window.
8 *
9 * TODO: Add support for more events like touch events and window resizes.
10 */
11#[derive(Copy, Clone, PartialEq)]
12pub enum Event {
13    /// Keyboard is either a keypress or a keyrelease. The `is_down` bool tells you which :)
14    Keyboard { is_down: bool, key: Key },
15
16    /// Mouse can be either a click or a click release. Refer to `is_down`. Note that the position
17    /// of the mouse at the time of the click is listed. The mouse may have moved in the meantime,
18    /// so for precision, you can use the position fields on this variant.
19    Mouse {
20        is_down: bool,
21        button: MouseButton,
22        mouse_x: i32,
23        mouse_y: i32,
24    },
25
26    /// The user has signaled to the OS that the application should be killed. This could happen
27    /// through clicking the X in the corner of the window or using CMD-Q or Alt-F4 (depending on
28    /// the platform).
29    ///
30    /// You normally do not have to catch this event yourself. Window has built-in code to process
31    /// this case.
32    Quit,
33}
34
35impl Event {
36    pub fn from_sdl2_event(e: SDL_Event) -> Option<Event> {
37        match e {
38            // Quit
39            SDL_Event::Quit { .. } => Some(Event::Quit),
40
41            // Keyboard
42            SDL_Event::KeyDown {
43                scancode: Some(key),
44                ..
45            } => Some(Event::Keyboard {
46                is_down: true,
47                key: key,
48            }),
49            SDL_Event::KeyUp {
50                scancode: Some(key),
51                ..
52            } => Some(Event::Keyboard {
53                is_down: false,
54                key: key,
55            }),
56
57            // Mouse
58            SDL_Event::MouseButtonDown {
59                mouse_btn: button,
60                x,
61                y,
62                ..
63            } => Some(Event::Mouse {
64                is_down: true,
65                button: button,
66                mouse_x: x,
67                mouse_y: y,
68            }),
69            SDL_Event::MouseButtonUp {
70                mouse_btn: button,
71                x,
72                y,
73                ..
74            } => Some(Event::Mouse {
75                is_down: false,
76                button: button,
77                mouse_x: x,
78                mouse_y: y,
79            }),
80
81            _ => None,
82        }
83    }
84}
85
86#[test]
87fn test_from_sdl2_event() {
88    fn test(input: SDL_Event, expected: Event) {
89        assert!(Event::from_sdl2_event(input).unwrap() == expected);
90    }
91
92    test(SDL_Event::Quit { timestamp: 0 }, Event::Quit);
93
94    // TODO: Test more comprehensively.
95}
simple/event.rs

simple/
event.rs
