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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>App.window_hide — Ludic</title>
<meta name="description" content="Take the game&#x27;s window off the screen.">
<link rel="stylesheet" href="base.css">
<link rel="stylesheet" href="docs.css">
</head>
<body>
<header class="nav"><div class="wrap nav-in"><a class="brand" href="index.html"><span class="logo">L</span> Ludic</a><button class="nav-toggle" aria-label="Toggle menu" aria-expanded="false">☰</button><nav class="nav-links"><a href="index.html">Home</a><a href="api.html">API Reference</a><a class="nav-cta" href="https://git.workshopsoft.io/workshopsoft/ludic">Source ↗</a></nav></div></header>
<main class="wrap item">
<div class="crumbs"><a href="api.html">API Reference</a> <span>›</span> <a href="ns-app.html">App</a> <span>›</span> <span class="here">App.window_hide</span></div>
<div class="item-head">
<span class="kind-badge kind-method">method</span>
<h1 id="top">App.window_hide</h1>
</div>
<code class="sig">App.window_hide() -&gt; void</code>
<div class="desc"><p>Takes the game's window off the screen without closing it: its GL context or Vulkan surface, its size and its contents are kept, and the program goes on running — a hidden window does not end the run. <a href="app-window_show.html"><code>App.window_show</code></a> brings it back. It is how a launcher steps aside while the game it started with <a href="../process/process-spawn.html"><code>Process.spawn</code></a> runs.</p><p>Keep the frame loop going while hidden so the child can be polled, but there is nothing to see: skip the drawing, and throttle the loop yourself — a hidden window is not paced by the display, so an unthrottled loop spins. It does not touch the boot splash (<a href="app-splash_hide.html"><code>App.splash_hide</code></a> does). Safe to call when there is no window yet, and twice. Headless there is no window and the call lowers to nothing.</p><p>``<code>ludic skip
program Launcher {
var game: int = -1
function play() -> void {
game = Process.spawn(game_path(), new []string)
if game >= 0 { App.window_hide() }
}
handler Watch phase Update {
if game >= 0 and Process.poll(game) != -1 {
Process.free(game)
game = -1
App.window_show()
}
}
}
</code>``</p><p><code>orderOut:</code> on macOS; <code>ShowWindow(SW_HIDE)</code> on Windows, which also forgets any key held as the window went.</p></div>
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