playdate-system 0.3.13

High-level System API built on-top of Playdate API
Documentation 
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

#![no_std]
extern crate alloc;

#[macro_use]
extern crate sys;
extern crate playdate_system as system;

use core::any::Any;
use core::ptr::NonNull;
use alloc::boxed::Box;

use sys::ffi::*;
use sys::EventLoopCtrl;
use system::System;
use system::update::UpdateCtrl;


/// Entry point
#[no_mangle]
fn event_handler(_api: NonNull<PlaydateAPI>, _event: PDSystemEvent, _: u32) -> EventLoopCtrl {
	println!("Init");

	// Do something good with `_api` here...


	// Registering update-callback with user-data.
	// The user-data is just a number because not needed nothing complex for this example.

	static mut HANDLE: Option<Box<dyn Any>> = None;

	if unsafe { HANDLE.is_none() } {
		let system = System::Default();
		let handle = system.set_update_callback(
		                                        move |v| {
			                                        *v += 1;
			                                        println!("{v}");

			                                        if *v == 100 {
				                                        println!("Stopping updates...");
				                                        system.set_update_callback_static(None, ());
				                                        println!("See you.");
			                                        }

			                                        // Continue updates:
			                                        UpdateCtrl::Continue
		                                        },
		                                        42,
		);
		unsafe { HANDLE = Some(Box::new(handle)) };
	}


	// Continue event-loop:
	EventLoopCtrl::Continue
}


// Needed for debug build
ll_symbols!();