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<script lang="ts">
import { tick } from "svelte";
import tinycolor from "tinycolor2";
import { clamp } from "../utils/pixi";
export let color = "rgb(255, 255, 255)";
let name = "world";
let sl_marker_pos = [0, 0];
let sl_rect: DOMRect | null = null;
let sl_moving = false;
let sl = [0, 0];
let hue = 0;
let hue_marker_pos = 0;
let hue_rect: DOMRect | null = null;
let hue_moving = false;
function handle_hue_down(
event: MouseEvent & { currentTarget: HTMLDivElement }
): void {
hue_rect = event.currentTarget.getBoundingClientRect();
hue_moving = true;
update_hue_from_mouse(event.clientX);
}
function update_hue_from_mouse(x: number): void {
if (!hue_rect) return;
const _x = clamp(x - hue_rect.left, 0, hue_rect.width); // Get the x-coordinate relative to the box
hue_marker_pos = _x;
const _hue = (_x / hue_rect.width) * 360; // Scale the x position to a hue value (0-360)
hue = _hue;
color = hsva_to_rgba({ h: _hue, s: sl[0], v: sl[1], a: 1 });
}
function hsva_to_rgba(hsva: {
h: number;
s: number;
v: number;
a: number;
}): string {
const saturation = hsva.s;
const value = hsva.v;
let chroma = saturation * value;
const hue_by_60 = hsva.h / 60;
let x = chroma * (1 - Math.abs((hue_by_60 % 2) - 1));
const m = value - chroma;
chroma = chroma + m;
x = x + m;
const index = Math.floor(hue_by_60) % 6;
const red = [chroma, x, m, m, x, chroma][index];
const green = [x, chroma, chroma, x, m, m][index];
const blue = [m, m, x, chroma, chroma, x][index];
return `rgba(${red * 255}, ${green * 255}, ${blue * 255}, ${hsva.a})`;
}
function update_color_from_mouse(x: number, y: number): void {
if (!sl_rect) return;
const _x = clamp(x - sl_rect.left, 0, sl_rect.width);
const _y = clamp(y - sl_rect.top, 0, sl_rect.height);
sl_marker_pos = [_x, _y];
const _hsva = {
h: hue * 1,
s: _x / sl_rect.width,
v: 1 - _y / sl_rect.height,
a: 1
};
sl = [_hsva.s, _hsva.v];
color = hsva_to_rgba(_hsva);
}
function handle_sl_down(
event: MouseEvent & { currentTarget: HTMLDivElement }
): void {
sl_moving = true;
sl_rect = event.currentTarget.getBoundingClientRect();
update_color_from_mouse(event.clientX, event.clientY);
}
function handle_move(
event: MouseEvent & { currentTarget: EventTarget & Window }
): void {
if (sl_moving) update_color_from_mouse(event.clientX, event.clientY);
if (hue_moving) update_hue_from_mouse(event.clientX);
}
function handle_end(): void {
if (sl_moving) sl_moving = false;
if (hue_moving) hue_moving = false;
}
async function update_mouse_from_color(color: string): Promise<void> {
if (sl_moving || hue_moving) return;
await tick();
if (!color) return;
if (!sl_rect) {
sl_rect = sl_wrap.getBoundingClientRect();
}
if (!hue_rect) {
hue_rect = hue_wrap.getBoundingClientRect();
}
const hsva = tinycolor(color).toHsv();
const _x = hsva.s * sl_rect!.width;
const _y = (1 - hsva.v) * sl_rect!.height;
sl_marker_pos = [_x, _y];
sl = [hsva.s, hsva.v];
hue = hsva.h;
hue_marker_pos = (hsva.h / 360) * hue_rect!.width;
}
$: update_mouse_from_color(color);
let sl_wrap: HTMLDivElement;
let hue_wrap: HTMLDivElement;
</script>
<svelte:window on:mousemove={handle_move} on:mouseup={handle_end} />
<!-- svelte-ignore a11y-no-static-element-interactions -->
<div
class="color-gradient"
on:mousedown={handle_sl_down}
style="--hue:{hue}"
bind:this={sl_wrap}
>
<div
class="marker"
style:transform="translate({sl_marker_pos[0]}px,{sl_marker_pos[1]}px)"
style:background={color}
/>
</div>
<!-- svelte-ignore a11y-no-static-element-interactions -->
<div class="hue-slider" on:mousedown={handle_hue_down} bind:this={hue_wrap}>
<div
class="marker"
style:background={"hsl(" + hue + ", 100%, 50%)"}
style:transform="translateX({hue_marker_pos}px)"
/>
</div>
<style>
.hue-slider {
position: relative;
width: 90%;
margin: 10px auto;
height: 10px;
border-radius: 5px;
background: linear-gradient(
to right,
hsl(0, 100%, 50%) 0%,
#ff0 17%,
lime 33%,
cyan 50%,
blue 67%,
magenta 83%,
red 100%
);
border-top: none;
}
.color-gradient {
position: relative;
--hue: white;
background: linear-gradient(rgba(0, 0, 0, 0), #000),
linear-gradient(90deg, #fff, hsl(var(--hue), 100%, 50%));
width: 100%;
height: 150px;
border-top-left-radius: 4px;
border-top-right-radius: 4px;
}
.marker {
position: absolute;
width: 14px;
height: 14px;
border-radius: 50%;
border: 2px solid white;
top: -7px;
left: -7px;
box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
pointer-events: none;
}
.hue-slider > .marker {
box-shadow: 0 0 1px #888;
top: -3px;
margin: auto;
height: 16px;
width: 16px;
left: -8px;
border: 2px solid white;
}
</style>
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