1    begin@ mouse
2    
3    type Capture @byval =
4        val x : u32
5        val y : u32
6        val relative_x : u32
7        val relative_y : u32
8        val control : Control
9    
10   type Mouse @[mut local] =
11       val link_presses = Stream<(MouseAction, Control, i32)>.new
12       val presses = Stream<(MouseAction, Control)>.new
13       var obs capture : Option<Capture> @[mut internal] = None
14       local obs position : (u32, u32) = (0, 0)
15       let position_to_control : u32 * u32 * (Control -> bool) -> Option<Control>
16       local tokens = List<Token>.new
17   
18       def try_hovered =
19           let (x, y) = position
20           position_to_control x y { true }
21   
22       fun destruct =
23           for i = tokens.size - 1 downto 0 do
24               tokens[i].discard
25