ucsc-xena-client/dist/CanvasDrawing2.js

UCSC Xena Client. Functional genomics visualizations.

// React component to manages redrawing a canvas element.

'use strict';

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; }; }();

function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }

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 _ = require('./underscore_ext');
var vgcanvas = require('./vgcanvas');
var React = require('react');
var ReactDOM = require('react-dom');

// This is a quick hack to work around the very different styling requirements
// of BandLegend, vs. the other canvas elements we have. Here we never change
// the pixel buffer size, but manipulate the canvas css size to scale over
// resize. The main point of this is that the size of the canvas width is
// driven by the css, so we're not holding the final width when we draw.

var CanvasDrawing = function (_React$Component) {
	_inherits(CanvasDrawing, _React$Component);

	function CanvasDrawing() {
		var _ref;

		var _temp, _this, _ret;

		_classCallCheck(this, CanvasDrawing);

		for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
			args[_key] = arguments[_key];
		}

		return _ret = (_temp = (_this = _possibleConstructorReturn(this, (_ref = CanvasDrawing.__proto__ || Object.getPrototypeOf(CanvasDrawing)).call.apply(_ref, [this].concat(args))), _this), _this.setHeight = function (height) {
			_this.vg.height(height);
		}, _this.setWidth = function (width) {
			_this.vg.width(width);
		}, _this.draw = function (props) {
			var draw = props.draw,
			    drawProps = _objectWithoutProperties(props, ['draw']),
			    zoom = drawProps.zoom,
			    width = drawProps.width,
			    height = zoom.height,
			    vg = _this.vg;

			if (vg.width() !== width) {
				_this.setWidth(width);
			}

			if (vg.height() !== height) {
				_this.setHeight(height);
			}

			draw(vg, drawProps);
		}, _temp), _possibleConstructorReturn(_this, _ret);
	}

	_createClass(CanvasDrawing, [{
		key: 'componentWillReceiveProps',
		value: function componentWillReceiveProps(newProps) {
			if (this.vg && !_.isEqual(newProps, this.props)) {
				this.draw(newProps);
			}
		}
	}, {
		key: 'shouldComponentUpdate',
		value: function shouldComponentUpdate() {
			return false;
		}
	}, {
		key: 'render',
		value: function render() {
			var style = this.props.style;

			return React.createElement('canvas', { style: style, ref: 'canvas' });
		}
	}, {
		key: 'componentDidMount',
		value: function componentDidMount() {
			var _props = this.props,
			    width = _props.width,
			    height = _props.zoom.height;

			this.vg = vgcanvas(ReactDOM.findDOMNode(this.refs.canvas), width, height);
			this.draw(this.props);
		}
	}]);

	return CanvasDrawing;
}(React.Component);

module.exports = CanvasDrawing;