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web-color-wheel
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Stroke hovered color.

This commit is contained in:
Anthony Lieuallen 2022-11-20 19:50:27 -05:00
parent 69d5b416ed
commit 53f5afab4b
1 changed files with 28 additions and 5 deletions
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33
colors.html
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@ -2,6 +2,9 @@
<head>
<title>Named Colors Wheel</title>
<style>
body {
text-align: center;
}
</style>
</head>
<body>
@ -15,12 +18,11 @@
xmlns="http://www.w3.org/2000/svg"
>
<style>
polygon { stroke-width: 4px; }
polygon:hover { stroke: black; }
polygon { stroke-width: 5px; }
</style>
<defs>
<mask id="circle-mask">
<mask id="circle-mask" maskUnits="userSpaceOnUse">
<rect x="0" y="0" width="1024" height="1024" fill="black" />
<circle cx="512" cy="512" r="512" fill="white" />
</mask>
@ -197,6 +199,7 @@ const cx = radius;
const cy = radius;
const svg = document.querySelector('svg');
const svgStyle = svg.querySelector('style').sheet;
let colorsBySite = {};
let sites = [];
@ -215,7 +218,6 @@ Object.entries(colors).forEach(([name, color], _) => {
});
let voronoi = new Voronoi().compute(sites, {xl: 0, xr: 1024, yt: 0, yb: 1024});
voronoi.cells.forEach(cell => {
if (cell.closeMe) {
console.warn('cell', cell, 'needs closing');
@ -225,7 +227,8 @@ voronoi.cells.forEach(cell => {
let [r, g, b] = colors[colorName];
let c = document.createElementNS('http://www.w3.org/2000/svg', 'polygon');
c.setAttribute('style', `fill: rgb(${r}, ${g}, ${b})`);
// c.setAttribute('style', `fill: );
c.setAttribute('data-color', colorName);
c.setAttribute('mask', 'url(#circle-mask)');
let points = '';
@ -237,5 +240,25 @@ voronoi.cells.forEach(cell => {
c.setAttribute('points', points);
svg.appendChild(c);
let rgb = `rgb(${r}, ${g}, ${b})`;
svgStyle.insertRule(`[data-color=${colorName}] { fill: ${rgb}; stroke: ${rgb}; }`);
});
svg.addEventListener('mouseover', e => {
let el = e.target;
if (el.tagName != 'polygon') return;
if (!el.nextElementSibling) return;
let parent = el.parentElement;
// Move the SVG node to the end, so it(s stroke) will draw above all others.
parent.appendChild(el);
// Force its stroke to be black. (Doing this with CSS doesn't work; the hover
// state is broken by mutating the DOM.)
el.style.stroke = 'black';
});
svg.addEventListener('mouseout', e => {
let el = e.target;
if (el.tagName != 'polygon') return;
// Reset stroke from mouseover.
el.style.stroke = '';
});
</script>