@arnaudpfu/react-color-picker
Version:
Simple react color picker.
88 lines (87 loc) • 3.75 kB
JavaScript
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Alpha = exports.computeAlphaValue = void 0;
const react_1 = __importStar(require("react"));
const Checkboard_1 = require("./Checkboard");
const computeAlphaValue = (e, container) => {
if (container === null) {
throw new Error('The slider container does\'t exist.');
}
let a;
const containerWidth = container.clientWidth;
const x = typeof e.pageX === 'number' ? e.pageX : e.touches[0].pageX;
const left = x - (container.getBoundingClientRect().left + window.pageXOffset);
if (left < 0) {
a = 0;
}
else if (left > containerWidth) {
a = 1;
}
else {
a = Math.round((left * 100) / containerWidth) / 100;
}
return a;
};
exports.computeAlphaValue = computeAlphaValue;
const Alpha = ({ color, onChange }) => {
const rgb = color.toRgba();
const container = (0, react_1.useRef)(null);
const handleChange = (e) => {
const alpha = (0, exports.computeAlphaValue)(e, container.current);
color.setAlpha(alpha);
onChange(color);
};
const handleMouseDown = (e) => {
handleChange(e);
window.addEventListener('mousemove', handleChange);
window.addEventListener('mouseup', handleMouseUp);
};
const handleMouseUp = () => {
unbindEventListeners();
};
const unbindEventListeners = () => {
window.removeEventListener('mousemove', handleChange);
window.removeEventListener('mouseup', handleMouseUp);
};
(0, react_1.useEffect)(() => unbindEventListeners());
const styles = {
gradient: {
background: `linear-gradient(to right, rgba(${rgb.r},${rgb.g},${rgb.b}, 0) 0%,
rgba(${rgb.r},${rgb.g},${rgb.b}, 1) 100%)`,
},
pointer: {
left: `${rgb.a * 100}%`,
},
};
return (react_1.default.createElement("div", { className: "alpha-container" },
react_1.default.createElement("div", { className: "alpha-checkboard" },
react_1.default.createElement(Checkboard_1.Checkboard, null)),
react_1.default.createElement("div", { style: styles.gradient, className: "alpha-gradient" }),
react_1.default.createElement("div", { ref: container, className: "pointer-container", onMouseDown: handleMouseDown, onTouchMove: handleChange, onTouchStart: handleChange },
react_1.default.createElement("div", { style: styles.pointer, className: "alpha-pointer" },
react_1.default.createElement("div", { className: "color-pointer" })))));
};
exports.Alpha = Alpha;