Settings Form
A canvas-native form — Input, Slider, Toggle, and Button in a Stack — repainting on demand, never per frame.
A canvas-native form — Input, Slider, Toggle, and Button in a Stack — repainting on demand, never per frame.
import { Scene } from "@vectojs/core";
import { Stack, Card, Text, Input, Slider, Toggle, Button } from "@vectojs/ui";
const app = document.querySelector("#app");
const canvas = document.querySelector("#canvas");
// Static form UI: repaint only on interaction, never per frame. `markDirty()`
// after any state change is the onDemand contract — the engine idles at ~0 CPU
// between edits instead of burning a 60fps loop on a motionless panel.
const scene = new Scene(canvas, { disableWindowResize: true });
scene.renderMode = "onDemand";
const CARD_W = 360;
const PAD = 24;
const ROW = 12;
const card = new Card({
width: CARD_W,
height: 300,
bg: "#0f1218",
border: "#1b1f29",
radius: 16,
label: "Notification settings",
});
const form = new Stack({ direction: "vertical", gap: ROW, align: "start" });
form.setPosition(PAD, PAD);
const title = new Text("Notification settings", {
font: "700 18px Inter, sans-serif",
color: "#f4f6f8",
});
const nameInput = new Input({
width: CARD_W - PAD * 2,
placeholder: "Display name",
value: "Ada Lovelace",
bg: "#14171f",
border: "#26324a",
radius: 10,
});
const volume = new Slider({
min: 0,
max: 100,
value: 70,
width: CARD_W - PAD * 2,
});
const emailToggle = new Toggle({
checked: true,
label: "Email alerts",
accent: "#7c5cff",
onChange: () => scene.markDirty(),
});
const saveBtn = new Button("Save changes", {
bg: "#7c5cff",
hoverBg: "#8f74ff",
color: "#ffffff",
radius: 10,
padding: 14,
onClick: () => {
saved.text = `Saved “${nameInput.value}” · vol ${Math.round(volume.value)} · email ${emailToggle.checked ? "on" : "off"}`;
scene.markDirty();
},
});
const saved = new Text("", {
font: "13px Inter, sans-serif",
color: "#22d3ee",
});
form.add(title);
form.add(nameInput);
form.add(volume);
form.add(emailToggle);
form.add(saveBtn);
form.add(saved);
card.add(form);
scene.add(card);
function fit() {
const w = app.clientWidth;
const h = app.clientHeight;
if (w === 0 || h === 0) return;
scene.resize(w, h);
card.setPosition(
Math.max(PAD, (w - CARD_W) / 2),
Math.max(PAD, (h - card.height) / 2),
);
scene.markDirty();
}
new ResizeObserver(fit).observe(app);
scene.start();
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<script src="/no-ff-webgpu.js"></script>
<title>Controls — Motif</title>
<style>
* {
margin: 0;
box-sizing: border-box;
}
html,
body {
width: 100%;
height: 100%;
overflow: hidden;
background: #06070a;
}
#app {
position: relative;
width: 100%;
height: 100%;
}
canvas {
display: block;
width: 100%;
height: 100%;
}
</style>
<script type="importmap">
{
"imports": {
"@vectojs/core": "https://esm.sh/@vectojs/core@1.9.2",
"@vectojs/ui": "https://esm.sh/@vectojs/ui@1.9.5?bundle"
}
}
</script>
</head>
<body>
<div id="app"><canvas id="canvas"></canvas></div>
<script type="module" src="./demo.js"></script>
</body>
</html>