1 extern crate sdl2;
2
3 use sdl2::event::Event;
4 use sdl2::keyboard::Keycode;
5 use std::collections::HashSet;
6 use std::time::Duration;
7
main() -> Result<(), String>8 pub fn main() -> Result<(), String> {
9 let sdl_context = sdl2::init()?;
10 let video_subsystem = sdl_context.video()?;
11
12 let _window = video_subsystem.window("Mouse", 800, 600)
13 .position_centered()
14 .build()
15 .map_err(|e| e.to_string())?;
16
17 let mut events = sdl_context.event_pump()?;
18
19 let mut prev_buttons = HashSet::new();
20
21 'running: loop {
22 for event in events.poll_iter() {
23 match event {
24 Event::KeyDown { keycode: Some(Keycode::Escape), .. } |
25 Event::Quit { .. } => break 'running,
26 _ => {}
27 }
28 }
29
30 // get a mouse state
31 let state = events.mouse_state();
32
33 // Create a set of pressed Keys.
34 let buttons = state.pressed_mouse_buttons().collect();
35
36 // Get the difference between the new and old sets.
37 let new_buttons = &buttons - &prev_buttons;
38 let old_buttons = &prev_buttons - &buttons;
39
40 if !new_buttons.is_empty() || !old_buttons.is_empty() {
41 println!("X = {:?}, Y = {:?} : {:?} -> {:?}", state.x(), state.y(), new_buttons, old_buttons);
42 }
43
44 prev_buttons = buttons;
45
46 std::thread::sleep(Duration::from_millis(100));
47 }
48
49 Ok(())
50 }
51