A theme picker shaped like a sun-path instrument: drag a needle along a half-dial to continuously blend five time-of-day colour themes, with the UI recolouring live and settling into the nearest theme on release.
"use client";
import {
ThemeDial,
DAY_THEMES,
type ThemeTokens,
} from "@/components/ui/theme-dial";
import { useState } from "react";
function Preview({ t }: { t: ThemeTokens }) {
return (
<div
className="overflow-hidden rounded-2xl"
style={{
background: t.surface,
color: t.ink,
boxShadow: `0 0 0 1px ${t.line}, 0 24px 50px -30px rgb(0 0 0 / 0.45)`,
}}
aria-label="Theme preview"
role="img"
>
<div
className="flex items-center gap-2 px-4 py-3"
style={{ borderBottom: `1px solid ${t.line}` }}
>
<span
className="grid size-6 place-items-center rounded-md text-[11px] font-semibold"
style={{ background: t.accent, color: t.surface }}
>
A
</span>
<span className="text-[13px] font-semibold">Acme Dashboard</span>
<span className="ml-auto text-[12px]" style={{ color: t.muted }}>
v2.4.0
</span>
</div>
<div className="grid gap-3 p-4">
<div>
<p className="m-0 text-[12px]" style={{ color: t.muted }}>
p50 search latency
</p>
<p className="m-0 text-[26px] font-semibold tracking-[-0.02em] tabular-nums">
62 ms
</p>
</div>
<svg
viewBox="0 0 200 50"
className="h-12 w-full"
preserveAspectRatio="none"
aria-hidden="true"
>
<polyline
points="0,8 30,12 60,9 90,38 120,42 150,43 200,44"
fill="none"
stroke={t.accent}
strokeWidth="2"
vectorEffect="non-scaling-stroke"
strokeLinejoin="round"
/>
<line
x1="0"
x2="200"
y1="49"
y2="49"
stroke={t.line}
vectorEffect="non-scaling-stroke"
/>
</svg>
<div className="grid gap-1">
{[
"Move search to the edge runtime",
"Cache facets for 60 seconds",
"Rate-limit the public endpoint",
].map((s, i) => (
<div
key={s}
className="flex items-center gap-2 rounded-lg px-2 py-1.5 text-[12.5px]"
style={{ background: i === 0 ? t.bg : "transparent" }}
>
<span
className="size-1.5 shrink-0 rounded-full"
style={{ background: i === 2 ? t.muted : t.accent }}
/>
<span className="truncate">{s}</span>
</div>
))}
</div>
<div className="flex gap-2 pt-1">
<span
className="rounded-lg px-3 py-1.5 text-[12.5px] font-medium"
style={{ background: t.ink, color: t.surface }}
>
Deploy
</span>
<span
className="rounded-lg px-3 py-1.5 text-[12.5px]"
style={{ boxShadow: `inset 0 0 0 1px ${t.line}`, color: t.muted }}
>
View logs
</span>
</div>
</div>
</div>
);
}
export default function Demo() {
const [page, setPage] = useState<ThemeTokens>(DAY_THEMES[1].tokens);
const [chosen, setChosen] = useState("paper");
return (
<div
className="flex h-full min-h-[600px] w-full items-center justify-center overflow-auto px-5 py-10"
style={{
background: page.bg,
containerType: "inline-size",
fontFamily: "Geist, ui-sans-serif, system-ui",
}}
>
<div className="flex w-full flex-col items-center gap-6">
<ThemeDial
defaultValue="paper"
onPreview={setPage}
onChange={(id) => setChosen(id)}
>
{(t) => <Preview t={t} />}
</ThemeDial>
<p
className="m-0 text-[12px]"
style={{ color: page.muted }}
aria-live="polite"
>
Saved theme: {DAY_THEMES.find((s) => s.id === chosen)?.name} · drag
the sun, or use ← →
</p>
</div>
</div>
);
}