@jmosouza/react-wavy
Version:
Generates a canvas waveform.
244 lines (213 loc) • 8.88 kB
JavaScript
module.exports =
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/* 0 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _react = __webpack_require__(1);
var _react2 = _interopRequireDefault(_react);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
var Wavy = function (_React$Component) {
_inherits(Wavy, _React$Component);
function Wavy() {
var _ref;
var _temp, _this, _ret;
_classCallCheck(this, Wavy);
for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
args[_key] = arguments[_key];
}
return _ret = (_temp = (_this = _possibleConstructorReturn(this, (_ref = Wavy.__proto__ || Object.getPrototypeOf(Wavy)).call.apply(_ref, [this].concat(args))), _this), _this.state = { cursor: 0 }, _this.onMouseMove = function (event) {
if (!_this.props.useCursor) return;
var rect = _this.canvas.getBoundingClientRect();
var x = event.clientX - rect.left;
_this.setState({ cursor: x });
}, _this.onMouseLeave = function (event) {
if (!_this.props.useCursor) return;
_this.setState({ cursor: 0 });
}, _this.onClick = function (event) {
var rect = _this.canvas.getBoundingClientRect();
console.log(event.clientX + " - " + rect.left + " - " + rect.width + " ");
var fraction = (event.clientX - rect.left) / rect.width;
_this.props.onClick(fraction);
}, _temp), _possibleConstructorReturn(_this, _ret);
}
_createClass(Wavy, [{
key: "componentDidMount",
value: function componentDidMount() {
var canvas = this.canvas;
var ctx = canvas.getContext("2d");
this.draw(ctx);
}
}, {
key: "componentDidUpdate",
value: function componentDidUpdate() {
this.draw(this.canvas.getContext("2d"));
}
}, {
key: "draw",
value: function draw(ctx) {
var data = this.props.data;
var width = this.props.width;
var height = this.props.height;
var cursor = this.state.cursor;
var useMiddle = this.props.useMiddle;
var progress = this.props.progress;
var cursorColor = this.props.cursorColor;
var innerColor = this.props.innerColor;
var outerColor = this.props.outerColor;
var gap = this.props.gap;
var step = this.props.step;
var ratio = data.length / width;
var position = progress * width;
var max = Math.max.apply(Math, _toConsumableArray(data));
var fixedData = max > 1 ? data.map(function (i) {
return i / max;
}) : data;
ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
for (var i = 0; i < width; i += step + gap) {
var datum = fixedData[Math.floor(i * ratio)];
if (position >= i) {
if (cursor >= position && position >= i) {
ctx.fillStyle = innerColor;
} else if (cursor >= i) {
ctx.fillStyle = cursorColor;
} else {
ctx.fillStyle = innerColor;
}
} else if (cursor >= i) {
ctx.fillStyle = cursorColor;
} else {
ctx.fillStyle = outerColor;
}
var h = useMiddle ? datum * height : -1 * datum * height;
var w = step;
var y = useMiddle ? (height - h) / 2 : height;
var x = i;
ctx.fillRect(x, y, w, Math.max(h, 1));
}
}
}, {
key: "render",
value: function render() {
var _this2 = this;
return _react2.default.createElement("canvas", {
ref: function ref(c) {
_this2.canvas = c;
},
width: this.props.width,
height: this.props.height,
onMouseMove: this.onMouseMove,
onMouseLeave: this.onMouseLeave,
onClick: this.onClick
});
}
}]);
return Wavy;
}(_react2.default.Component);
Wavy.defaultProps = {
data: [],
width: 900,
height: 70,
gap: 1,
step: 2,
progress: 0,
useMiddle: false,
useCursor: false,
onClick: function onClick() {},
outerColor: "#ecf0f1",
innerColor: "#29272c",
cursorColor: "#5bcaff"
};
Wavy.propTypes = {
data: _react2.default.PropTypes.array.isRequired,
width: _react2.default.PropTypes.number,
height: _react2.default.PropTypes.number,
gap: _react2.default.PropTypes.number,
step: _react2.default.PropTypes.number,
progress: _react2.default.PropTypes.number,
useMiddle: _react2.default.PropTypes.bool,
useCursor: _react2.default.PropTypes.bool,
onClick: _react2.default.PropTypes.func,
innerColor: _react2.default.PropTypes.string,
outerColor: _react2.default.PropTypes.string,
cursorColor: _react2.default.PropTypes.string
};
exports.default = Wavy;
/***/ }),
/* 1 */
/***/ (function(module, exports) {
module.exports = require("react");
/***/ })
/******/ ]);