{"id":7605,"date":"2018-05-25T02:01:30","date_gmt":"2018-05-24T18:01:30","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=7605"},"modified":"2018-06-01T00:01:48","modified_gmt":"2018-05-31T16:01:48","slug":"js-dom-transform-line-chart","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2018\/05\/js-dom-transform-line-chart\/","title":{"rendered":"\u4e0d\u501f\u52a9Echarts\u7b49\u56fe\u5f62\u6846\u67b6\u539f\u751fJS\u5feb\u901f\u5b9e\u73b0\u6298\u7ebf\u56fe\u6548\u679c"},"content":{"rendered":"

by zhangxinxu<\/a> from http:\/\/www.zhangxinxu.com\/wordpress\/?p=7605<\/a>
\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u4f46\u9700\u5f97\u5230\u539f\u4f5c\u8005\u4e66\u9762\u8bb8\u53ef\uff0c\u540c\u65f6\u4fdd\u7559\u539f\u4f5c\u8005\u548c\u51fa\u5904\uff0c\u6458\u8981\u5f15\u6d41\u5219\u968f\u610f\u3002<\/p>\n

\u4e00\u3001\u6298\u7ebf\u56fe\u6548\u679c\u9884\u89c8<\/h3>\n

\u4f8b\u5982\u4e0b\u56fe\u6240\u793a\u7684\u6298\u7ebf\u56fe\u6548\u679c\u5b9e\u73b0\u5c31\u5f88\u7b80\u5355\uff1a<\/p>\n

\"\u6298\u7ebf\u56fe\u6548\u679c\"<\/p>\n

\u8c03\u7528\u4e0b\u9762\u8fd9\u6bb5JS\u4ee3\u7801\u4e2d\u7684\u65b9\u6cd5\u5c31\u597d\u4e86\uff1a<\/p>\n

\/**\n* @description \u70b9\u8fde\u6210\u7ebf\u65b9\u6cd5\n**\/<\/span>\nvar fnLineChart = function (eleDots) {\n    [].slice.call(eleDots).forEach(function (ele, index) {\n        var eleNext = eleDots[index + 1];\n        if (!eleNext) { return;  }\n        var eleLine = ele.querySelector('i');\n        if (!eleLine) {\n            eleLine = document.createElement('i');\n            eleLine.setAttribute('line', '');\n            ele.appendChild(eleLine);\n        }\n        \/\/ \u8bb0\u5f55\u5750\u6807<\/span>\n        var boundThis = ele.getBoundingClientRect();\n        \/\/ \u4e0b\u4e00\u4e2a\u70b9\u7684\u5750\u6807<\/span>\n        var boundNext = eleNext.getBoundingClientRect();\n        \/\/ \u8ba1\u7b97\u957f\u5ea6\u548c\u65cb\u8f6c\u89d2\u5ea6<\/span>\n        var x1 = boundThis.left, y1 = boundThis.top;\n        var x2 = boundNext.left, y2 = boundNext.top;\n        \/\/ \u957f\u5ea6<\/span>\n        var distance = Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n        \/\/ \u89d2\u5ea6<\/span>\n        var radius = Math.atan((y2 - y1) \/ (x2 - x1));\n        \/\/ \u8bbe\u7f6e\u7ebf\u6761\u6837\u5f0f<\/span>\n        eleLine.style.width = distance + 'px';\n        eleLine.style.msTransform = 'rotate('+ radius +'rad)';\n        eleLine.style.transform = 'rotate('+ radius +'rad)';\n    });\n};<\/pre>\n
\u5047\u8bbe\u9875\u9762\u4e0a\u9700\u8981\u8fde\u63a5\u7684\u6240\u6709\u70b9\u5143\u7d20\u96c6\u5408\u662feleDots<\/code>\uff0c\u5219\u9875\u9762\u4e0a\u6267\u884c\u4e0bfnLineChart(eleDots)<\/code>\u6548\u679c\u5c31\u51fa\u6765\u4e86\u3002<\/p>\n
\u5f53\u7136\uff0c\u8fd9\u6bb5JS\u53ea\u5904\u7406\u957f\u5ea6\u548c\u89d2\u5ea6\u8fd9\u4e24\u4e2a\u52a8\u6001\u5c5e\u6027\uff0c\u5176\u4ed6\u56fa\u5b9a\u7684\u6837\u5f0f\u8fd8\u9700\u8981CSS\u914d\u5408\uff0c\u4f8b\u5982\uff0c\u7ebf\u6761\u7684\u7c97\u7ec6\u548c\u7ebf\u6761\u989c\u8272\uff0c\u4f8b\u5982\u4e0b\u9762\u8fd9\u4e2a\u7c97\u7ec62\u50cf\u7d20\u7684\u7eff\u8272\u6298\u7ebf\uff0c\u53ef\u4ee5\u8fd9\u6837\uff1a<\/p>\n
i[line] {\n  position: absolute;\n  border-top: 2px solid green;\n}<\/pre>\n
\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a\u7b80\u5355HTML\u548cJS\u4ee3\u7801\u7ed8\u5236\u6298\u7ebf\u56fedemo<\/a><\/p>\n
\u4e8c\u3001\u659c\u7ebf\u6548\u679c\u5b9e\u73b0\u7684\u539f\u7406<\/h3>\n
1. \u8ba1\u7b97\u4e24\u70b9\u4e4b\u95f4\u7684\u76f4\u7ebf\u957f\u5ea6<\/h4>\n
\u8fd9\u4e2a\u5e94\u8be5\u5c5e\u4e8e\u521d\u4e2d\u6216\u8005\u9ad8\u4e2d\u65f6\u5019\u7684\u77e5\u8bc6\uff0c\u52fe\u80a1\u5b9a\u7406\uff0ca^2 + b^2 = c^2\uff0c\u76f4\u7ebf\u957f\u5ea6\u5b9e\u9645\u4e0a\u5c31\u662fc<\/code>\uff0c\u800ca<\/code>, b<\/code>\u5219\u662f\u4e24\u4e2a\u70b9\u7684\u6a2a\u5750\u6807\u8ddd\u79bb\u548c\u7eb5\u5750\u6807\u8ddd\u79bb\uff0c\u5047\u8bbe\u76f4\u7ebf\u524d\u540e\u4e24\u4e2a\u70b9\u7684\u5750\u6807\u5206\u522b\u662f(x1, y1)<\/code>\u548c(x2, y2)<\/code>\uff0c\u5219\u76f4\u7ebf\u957f\u5ea6\u4e3a\uff1a<\/p>\n
Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1))<\/pre>\n
2. \u8ba1\u7b97\u4e24\u70b9\u4e4b\u95f4\u7684\u5f27\u5ea6\u6216\u89d2\u5ea6<\/h4>\n
\u8fd9\u4e2a\u4e5f\u662f\u5c5e\u4e8e\u521d\u4e2d\u6216\u8005\u9ad8\u4e2d\u65f6\u5019\u7684\u77e5\u8bc6\uff0c\u5df2\u77e5\u4e24\u4e2a\u76f4\u89d2\u8fb9\u7684\u957f\u5ea6\uff0c\u6c42y<\/code>\u8fb9\u7684\u5bf9\u89d2\u89d2\u5ea6\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Math.atan()<\/code>\u65b9\u6cd5\u8ba1\u7b97\u51fa\u5f27\u5ea6\uff0cCSS3\u4e2d\u6709\u4e13\u95e8\u7684\u5f27\u5ea6\u5355\u4f4drad<\/code>\uff0c\u5c31\u662f\u7528\u6765\u7ed9\u65cb\u8f6c\u4f7f\u7528\u7684\uff0c\u4e8e\u662f\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u8bbe\u7f6e\uff1a<\/p>\n
eleLine.style.transform = 'rotate('+ Math.atan((y2 - y1) \/ (x2 - x1)) +'rad)'<\/pre>\n
\u6211\u4eec\u7684\u7ebf\u6761\u5c31\u65cb\u8f6c\u4e86\u3002\u6709\u4e9b\u5c0f\u4f19\u4f34\u4e60\u60ef\u4f7f\u7528\u89d2\u5ea6deg<\/code>\uff0c\u4e5f\u662f\u53ef\u4ee5\u7684\uff0c\u501f\u52a9Math.PI<\/code>\u5e38\u91cf\u518d\u8f6c\u6362\u4e0b\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
eleLine.style.transform = 'rotate('+ 180 \/ Math.PI * Math.atan((y2 - y1) \/ (x2 - x1)) +'deg)'<\/pre>\n
3. \u8bbe\u7f6etransform-origin\u53d8\u6362\u70b9<\/h4>\n
\u8fd9\u4e00\u6b65\u5f88\u91cd\u8981\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\uff0c\u5426\u5219\u7ebf\u6761\u7684\u4f4d\u7f6e\u4f1a\u6709\u95ee\u9898\uff0c\u5c31\u662f\u6211\u4eec\u9700\u8981\u8bbe\u7f6e\u7ebf\u6761\u65cb\u8f6c\u7684\u53d8\u6362\u70b9\u662f\u5de6\u8fb9\u7f18\u5c45\u4e2d\u4f4d\u7f6e\uff0c\u5982\u4e0bCSS\u4ee3\u7801\uff1a<\/p>\n
i[line] {\n  transform-origin: left center;\n}<\/pre>\n
\u4e8e\u662f\u4e4e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u753b\u51fa\u4e24\u70b9\u4e4b\u95f4\u7684\u659c\u7ebf\u6548\u679c\u4e86\u3002<\/p>\n
\u56e0\u6b64\uff0c\u8981\u5b9e\u73b0\u6298\u7ebf\u56fe\u56fe\u8868\u6548\u679c\uff0c\u6b65\u9aa4\u4e0b\u9762\u8fd9\u6837\uff1a<\/p>\n
    \n
  1. \u70b9\u5143\u7d20\u5728\u9875\u9762\u4e0a\u5199\u597d\uff1b<\/li>\n
  2. \u8bbe\u7f6e\u7ebf\u989c\u8272\u3001\u7c97\u7ec6\u548c\u53d8\u6362\u70b9\u4f4d\u7f6e\uff1b<\/li>\n
  3. \u5957\u7528fnLineChart()<\/code>\u65b9\u6cd5\uff1b<\/li>\n<\/ol>\n
    \u5982\u679c\u5e0c\u671b\u79fb\u5230\u70b9\u5143\u7d20\u4e0a\u6709\u9ed1\u8272tips\u4fe1\u606f\u63d0\u793a\uff0c\u53ef\u4ee5\u4f7f\u7528LuLu UI\u4e2d\u7684tips\u63d0\u793a\u65b9\u6cd5<\/a>\uff0c\u5982\u679c\u7ed3\u6784\u5408\u7406\uff0c\u7eafCSS\u5c31\u53ef\u4ee5\u5b9e\u73b0\u3002<\/p>\n
    \u4e09\u3001\u7b80\u5355\u7684\u56fe\u8868\u6548\u679c\u6ca1\u5fc5\u8981\u4f7f\u7528\u6846\u67b6<\/h3>\n
    \u672c\u6587demo\u5c55\u793a\u6298\u7ebf\u659c\u7ebf\u56fe\u8868\u6548\u679c\uff0c\u6240\u4f7f\u7528JS\u4ee3\u7801\u5c31\u5be5\u5be5\u51e0\u5341\u884c\uff0c\u800c\u4e14\u4ee5\u540e\u4e5f\u53ef\u4ee5\u590d\u7528\uff0c\u4ee3\u7801\u91cf\u51e0\u4e4e\u53ef\u4ee5\u4e0d\u503c\u4e00\u63d0\u3002\u4f46\u662f\uff0c\u5982\u679c\u5c31\u4e3a\u4e86\u8fd9\u4e00\u4e2a\u5c0f\u5c0f\u7684\u529f\u80fd\uff0c\u800c\u5f15\u5165\u4e00\u4e2a\u5de8\u5927\u7684 Highcharts \u6216\u8005 Echarts JS\u6587\u4ef6\u5c31\u6210\u672c\u6709\u4e9b\u5927\uff0c\u800c\u4e14UI\u5b9a\u5236\u8fd9\u4e00\u5757\u4e5f\u4e0d\u5982\u624b\u52a8\u5199\u5199\u6837\u5f0f\u6765\u5f97\u5feb\u3002<\/p>\n
    \u7b80\u5355\u7684\u56fe\u8868\u6548\u679c\u5b8c\u5168\u6ca1\u5fc5\u8981\u4f7f\u7528\u6846\u67b6\uff0c\u7eaf\u624b\u5199\u624b\u5199\u6b63\u597d\u8fd8\u53ef\u4ee5\u953b\u70bc\u81ea\u5df1\u7684\u57fa\u672c\u529f\u3002<\/p>\n
    \u4ee5\u524d\u4ecb\u7ecd\u8fc7\u5982\u4f55\u4f7f\u7528CSS3\u5b9e\u73b0\u997c\u56fe\u6548\u679c\uff0c\u53ef\u4ee5\u53c2\u89c1\u201cCSS3\u5b9e\u73b0\u997c\u56feloading\u6548\u679c<\/a>\u201d\u8fd9\u7bc7\u6587\u7ae0\u3002<\/p>\n
    \u4e5f\u662f\u53ef\u4ee5\u7eaf\u4f20\u7edfDOM\u5b9e\u73b0\uff0c\u65e0\u9700\u501f\u52a9SVG\u6216canvas\u6280\u672f\u3002<\/p>\n
    \u56fe\u8868\u6846\u67b6\u4ec0\u4e48\u65f6\u5019\u4f7f\u7528\u5408\u9002\u5462\uff1f<\/p>\n