301 lines
12 KiB
HTML
301 lines
12 KiB
HTML
<!DOCTYPE html>
|
||
<html>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
||
<!-- Disable zooming: -->
|
||
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
|
||
|
||
<!-- TODO: read https://www.html5rocks.com/en/mobile/mobifying/#toc-meta-viewport -->
|
||
|
||
<head>
|
||
<title>Egui – An experimental immediate mode GUI written in Rust</title>
|
||
<style>
|
||
html {
|
||
/* Remove touch delay: */
|
||
touch-action: manipulation;
|
||
}
|
||
|
||
body {
|
||
background: #101010;
|
||
}
|
||
|
||
/* Allow canvas to fill entire web page: */
|
||
html,
|
||
body {
|
||
overflow: hidden;
|
||
margin: 0 !important;
|
||
padding: 0 !important;
|
||
}
|
||
</style>
|
||
</head>
|
||
|
||
<body>
|
||
<script>
|
||
// The `--no-modules`-generated JS from `wasm-bindgen` attempts to use
|
||
// `WebAssembly.instantiateStreaming` to instantiate the wasm module,
|
||
// but this doesn't work with `file://` urls. This example is frequently
|
||
// viewed by simply opening `index.html` in a browser (with a `file://`
|
||
// url), so it would fail if we were to call this function!
|
||
//
|
||
// Work around this for now by deleting the function to ensure that the
|
||
// `no_modules.js` script doesn't have access to it. You won't need this
|
||
// hack when deploying over HTTP.
|
||
delete WebAssembly.instantiateStreaming;
|
||
</script>
|
||
|
||
<!-- this is the JS generated by the `wasm-bindgen` CLI tool -->
|
||
<script src="example_wasm.js"></script>
|
||
|
||
<script>
|
||
// we'll defer our execution until the wasm is ready to go
|
||
// here we tell bindgen the path to the wasm file so it can start
|
||
// initialization and return to us a promise when it's done
|
||
wasm_bindgen("./example_wasm_bg.wasm")
|
||
.then(on_wasm_loaded)["catch"](console.error);
|
||
// ----------------------------------------------------------------------------
|
||
var g_wasm_app = null;
|
||
|
||
function paint_gui(canvas) {
|
||
if (g_wasm_app === null) {
|
||
g_wasm_app = wasm_bindgen.new_webgl_gui("canvas");
|
||
}
|
||
|
||
let input = {
|
||
egui: get_egui_input(canvas),
|
||
web: {
|
||
location: window.location.toString(),
|
||
location_hash: window.location.hash.toString(), // i.e. #fragment
|
||
},
|
||
}
|
||
|
||
let output = JSON.parse(wasm_bindgen.run_gui(g_wasm_app, JSON.stringify(input)));
|
||
// console.log(`output: ${JSON.stringify(output)}`);
|
||
document.body.style.cursor = from_egui_cursor(output.cursor_icon);
|
||
// console.log(`Translated ${output.cursor_icon} to ${document.body.style.cursor}`);
|
||
if (output.open_url) {
|
||
window.open(output.open_url, "_self");
|
||
}
|
||
}
|
||
|
||
function from_egui_cursor(cursor) {
|
||
if (cursor == "no_drop") { return "no-drop"; }
|
||
else if (cursor == "not_allowed") { return "not-allowed"; }
|
||
else if (cursor == "resize_horizontal") { return "ew-resize"; }
|
||
else if (cursor == "resize_ne_sw") { return "nesw-resize"; }
|
||
else if (cursor == "resize_nw_se") { return "nwse-resize"; }
|
||
else if (cursor == "resize_vertical") { return "ns-resize"; }
|
||
else if (cursor == "pointing_hand") { return "pointer"; }
|
||
// TODO: more
|
||
else {
|
||
// default, help, pointer, progress, wait, cell, crosshair, text, alias, copy, move, grab, grabbing,
|
||
return cursor;
|
||
}
|
||
}
|
||
|
||
// ----------------------------------------------------------------------------
|
||
var g_mouse_pos = null;
|
||
var g_mouse_down = false;
|
||
var g_is_touch = false; // we don't know yet
|
||
var g_scroll_delta_x = 0;
|
||
var g_scroll_delta_y = 0;
|
||
var g_events = [];
|
||
|
||
function pixels_per_point() {
|
||
return window.devicePixelRatio || 1.0;
|
||
}
|
||
|
||
function auto_resize_canvas(canvas) {
|
||
canvas.style.width = window.innerWidth + "px";
|
||
canvas.style.height = window.innerHeight + "px";
|
||
canvas.width = window.innerWidth * pixels_per_point();
|
||
canvas.height = window.innerHeight * pixels_per_point();
|
||
}
|
||
|
||
function get_egui_input(canvas) {
|
||
var input = {
|
||
mouse_down: g_mouse_down,
|
||
mouse_pos: g_mouse_pos,
|
||
scroll_delta: { x: -g_scroll_delta_x, y: -g_scroll_delta_y }, // TODO: standardize scroll direction
|
||
screen_size: { x: window.innerWidth, y: window.innerHeight },
|
||
pixels_per_point: pixels_per_point(),
|
||
time: window.performance.now() / 1000.0,
|
||
seconds_since_midnight: seconds_since_midnight(),
|
||
events: g_events,
|
||
};
|
||
g_scroll_delta_x = 0;
|
||
g_scroll_delta_y = 0;
|
||
g_events = [];
|
||
return input;
|
||
}
|
||
|
||
function seconds_since_midnight() {
|
||
var d = new Date();
|
||
return (d.getHours() * 60.0 + d.getMinutes()) * 60.0 + d.getSeconds() + 1e-3 * d.getMilliseconds();
|
||
}
|
||
|
||
function mouse_pos_from_event(canvas, event) {
|
||
var rect = canvas.getBoundingClientRect();
|
||
return {
|
||
x: event.clientX - rect.left,
|
||
y: event.clientY - rect.top
|
||
};
|
||
}
|
||
|
||
// If true, paint at full framerate always.
|
||
// If false, only paint on input.
|
||
// TODO: if this is turned off we must turn off animations too (which hasn't been implemented yet).
|
||
const ANIMATION_FRAME = true;
|
||
|
||
function paint() {
|
||
var canvas = document.getElementById("canvas");
|
||
auto_resize_canvas(canvas);
|
||
paint_gui(canvas);
|
||
}
|
||
|
||
function paint_and_schedule() {
|
||
paint();
|
||
if (ANIMATION_FRAME) {
|
||
window.requestAnimationFrame(paint_and_schedule);
|
||
}
|
||
}
|
||
|
||
function on_wasm_loaded() {
|
||
var canvas = document.getElementById("canvas");
|
||
var invalidate = function () {
|
||
if (!ANIMATION_FRAME) {
|
||
paint();
|
||
}
|
||
};
|
||
|
||
canvas.addEventListener("mousedown", function (event) {
|
||
if (g_is_touch) { return; }
|
||
g_mouse_pos = mouse_pos_from_event(canvas, event);
|
||
g_mouse_down = true;
|
||
invalidate();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
canvas.addEventListener("mousemove", function (event) {
|
||
if (g_is_touch) { return; }
|
||
g_mouse_pos = mouse_pos_from_event(canvas, event);
|
||
invalidate();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
canvas.addEventListener("mouseup", function (event) {
|
||
if (g_is_touch) { return; }
|
||
g_mouse_pos = mouse_pos_from_event(canvas, event);
|
||
g_mouse_down = false;
|
||
invalidate();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
canvas.addEventListener("mouseleave", function (event) {
|
||
if (g_is_touch) { return; }
|
||
g_mouse_pos = null;
|
||
invalidate();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
|
||
canvas.addEventListener("touchstart", function (event) {
|
||
g_is_touch = true;
|
||
g_mouse_pos = { x: event.touches[0].pageX, y: event.touches[0].pageY };
|
||
g_mouse_down = true;
|
||
invalidate();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
canvas.addEventListener("touchmove", function (event) {
|
||
g_is_touch = true;
|
||
g_mouse_pos = { x: event.touches[0].pageX, y: event.touches[0].pageY };
|
||
invalidate();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
canvas.addEventListener("touchend", function (event) {
|
||
g_is_touch = true;
|
||
g_mouse_down = false; // First release mouse to click...
|
||
paint();
|
||
g_mouse_pos = null; // ...remove hover effect
|
||
invalidate();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
|
||
canvas.addEventListener("wheel", function (event) {
|
||
g_scroll_delta_x += event.deltaX;
|
||
g_scroll_delta_y += event.deltaY;
|
||
invalidate();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
|
||
document.addEventListener("keydown", function (event) {
|
||
var key = translate_key(event.key);
|
||
if (key) {
|
||
g_events.push({ "key": { "key": key, 'pressed': true } });
|
||
} else {
|
||
g_events.push({ "text": event.key });
|
||
}
|
||
invalidate();
|
||
// event.stopPropagation();
|
||
// event.preventDefault();
|
||
});
|
||
|
||
// document.addEventListener("keypress", function (event) {
|
||
// console.log(`keypress: ${event.key} ${JSON.stringify(event)}`);
|
||
// invalidate();
|
||
// event.stopPropagation();
|
||
// event.preventDefault();
|
||
// });
|
||
|
||
document.addEventListener("keyup", function (event) {
|
||
// console.log(`keyup: ${event.key} ${JSON.stringify(event)}`);
|
||
var key = translate_key(event.key);
|
||
if (key) {
|
||
g_events.push({ "key": { "key": key, 'pressed': false } });
|
||
}
|
||
invalidate();
|
||
// event.stopPropagation();
|
||
// event.preventDefault();
|
||
});
|
||
|
||
if (!ANIMATION_FRAME) {
|
||
window.addEventListener("load", invalidate);
|
||
window.addEventListener("pagehide", invalidate);
|
||
window.addEventListener("pageshow", invalidate);
|
||
window.addEventListener("resize", invalidate);
|
||
}
|
||
|
||
paint_and_schedule();
|
||
}
|
||
|
||
function translate_key(key) {
|
||
if (key == "Alt") { return "alt"; }
|
||
if (key == "Backspace") { return "backspace"; }
|
||
if (key == "Control") { return "control"; }
|
||
if (key == "Delete") { return "delete"; }
|
||
if (key == "ArrowDown") { return "down"; }
|
||
if (key == "End") { return "end"; }
|
||
if (key == "Escape") { return "escape"; }
|
||
if (key == "Home") { return "home"; }
|
||
if (key == "Help") { return "insert"; }
|
||
if (key == "ArrowLeft") { return "left"; }
|
||
if (key == "Meta") { return "logo"; }
|
||
if (key == "PageDown") { return "page_down"; }
|
||
if (key == "PageUp") { return "page_up"; }
|
||
if (key == "Enter") { return "return"; }
|
||
if (key == "ArrowRight") { return "right"; }
|
||
if (key == "Shift") { return "shift"; }
|
||
// if (key == " ") { return "space"; }
|
||
if (key == "Tab") { return "tab"; }
|
||
if (key == "ArrowUp") { return "up"; }
|
||
return null;
|
||
}
|
||
</script>
|
||
<!-- We later make this cover the entire screen even when resized -->
|
||
<canvas id="canvas" width="1024" height="1024"></canvas>
|
||
</body>
|
||
|
||
</html>
|