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type Layer = struct {
blocks_input: *fn() bool,
input: *fn(InputEvent) bool,
is_opaque: *fn() bool,
render: *fn() void,
};
type InputEvent = (CancelEvent | KeyEvent |
MouseButtonEvent | MouseOverEvent);
type CancelEvent = void;
type KeyEvent = struct {
status: ButtonStatus,
key: Key,
};
type Key = uint;
type MouseButtonEvent = struct {
status: ButtonStatus,
button: MouseButton,
};
type MouseButton = enum u8 {
LEFT,
MIDDLE,
RIGHT,
X1,
X2,
};
type ButtonStatus = enum u8 {
UP,
HELD,
DOWN,
};
type MouseOverEvent = struct {
covered: bool,
};
const LAYERS = [
&LAYER_GAME,
&LAYER_HUD,
&LAYER_DEATH,
&LAYER_GAME_WAITING,
&LAYER_CLIENT_WAITING,
];
fn layers_input(event: InputEvent, top: size, all: bool) size = {
for (top > 0) {
top -= 1;
if (LAYERS[top].input(event) && !all) {
break;
};
};
return top;
};
fn layers_render() void = {
let bottom = len(LAYERS);
for (bottom != 0) {
bottom -= 1;
if (LAYERS[bottom].is_opaque()) {
break;
};
};
for (let i = bottom; i < len(LAYERS); i += 1) {
LAYERS[i].render();
};
};
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