{"id":135663,"date":"2020-07-16T03:19:40","date_gmt":"2020-07-15T19:19:40","guid":{"rendered":"http:\/\/4563.org\/?p=135663"},"modified":"2020-07-16T03:19:40","modified_gmt":"2020-07-15T19:19:40","slug":"d3-js-%e5%8a%9b%e5%af%bc%e5%90%91%e5%9b%be%e7%9a%84%e6%98%be%e7%a4%ba%e4%bc%98%e5%8c%96%ef%bc%88%e4%ba%8c%ef%bc%89-%e8%87%aa%e5%ae%9a%e4%b9%89%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=135663","title":{"rendered":"D3.js \u529b\u5bfc\u5411\u56fe\u7684\u663e\u793a\u4f18\u5316\uff08\u4e8c\uff09- \u81ea\u5b9a\u4e49\u529f\u80fd"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  D3.js \u529b\u5bfc\u5411\u56fe\u7684\u663e\u793a\u4f18\u5316\uff08\u4e8c\uff09- \u81ea\u5b9a\u4e49\u529f\u80fd               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : NebulaGraph <\/span>  <span><i><\/i> 9<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<blockquote>\n<p>\u6458\u8981\uff1a \u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u501f\u52a9 D3.js \u7684\u7075\u6d3b\u6027\u8fd9\u4e00\u4f18\u52bf\uff0c\u53bb\u65b0\u589e\u4e00\u4e9b D3.js \u672c\u8eab\u5e76\u4e0d\u652f\u6301\u4f46\u6211\u4eec\u60f3\u8981\u7684\u4e00\u4e9b\u5e38\u89c1\u7684\u529f\u80fd\uff1aNebula Graph \u56fe\u63a2\u7d22\u7684\u5220\u9664\u8282\u70b9\u548c\u7f29\u653e\u529f\u80fd\u3002<\/p>\n<\/blockquote>\n<blockquote>\n<p>\u6587\u7ae0\u9996\u53d1\u4e8e Nebula Graph \u5b98\u535a\uff1a https:\/\/nebula-graph.com.cn\/posts\/d3-js-examples-for-advaned-uses\/<\/p>\n<\/blockquote>\n<p>![D3 \u663e\u793a\u4f18\u5316]( https:\/\/www-cdn.nebula-graph.com.cn\/nebula-blog\/D3 \u663e\u793a\u4f18\u5316.png)<\/p>\n<h2>\u524d\u8a00<\/h2>\n<p>\u5728\u4e0a\u7bc7\u6587\u7ae0\u4e2d\uff08D3.js \u529b\u5bfc\u5411\u56fe\u7684\u663e\u793a\u4f18\u5316\uff09\uff0c\u6211\u4eec\u8bf4\u8fc7 D3.js \u5728\u81ea\u5b9a\u4e49\u56fe\u5f62\u4e0a\u76f8\u8f83\u4e8e\u5176\u4ed6\u5f00\u6e90\u53ef\u89c6\u5316\u5e93\u7684\u4f18\u52bf\uff0c\u4ee5\u53ca\u5982\u4f55\u5bf9\u6587\u6863\u5bf9\u8c61\u6a21\u578b\uff08 DOM \uff09\u8fdb\u884c\u7075\u6d3b\u64cd\u4f5c\u3002\u65e2\u7136 D3.js \u8fa3\u4e48\u7075\u6d3b\uff0c\u90a3\u662f\u4e0d\u662f\u5b9e\u73b0\u5f88\u591a\u6211\u4eec\u60f3\u505a\u7684\u4e8b\u60c5\u5462\uff1f\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u501f\u52a9 D3.js \u7684\u7075\u6d3b\u6027\u8fd9\u4e00\u4f18\u52bf\uff0c\u53bb\u65b0\u589e\u4e00\u4e9b D3.js \u672c\u8eab\u5e76\u4e0d\u652f\u6301\u4f46\u6211\u4eec\u60f3\u8981\u7684\u4e00\u4e9b\u5e38\u89c1\u7684\u529f\u80fd\u3002<\/p>\n<h2>\u6784\u5efa D3.js \u529b\u5bfc\u5411\u56fe<\/h2>\n<p>\u5728\u8fd9\u91cc\u6211\u4eec\u5c31\u4e0d\u518d\u7ec6\u8bf4 d3-force \u7c92\u5b50\u7269\u7406\u8fd0\u52a8\u6a21\u5757\u539f\u7406\uff0c\u611f\u5174\u8da3\u540c\u5b66\u53ef\u4ee5\u770b\u770b\u6211\u4eec\u7684\u4e0a\u7bc7\u7684\u7b80\u5355\u63cf\u8ff0, \u672c\u6b21\u5b9e\u8df5\u6211\u4eec\u4fa7\u91cd\u4e8e\u53ef\u89c6\u5316\u64cd\u4f5c\u7684\u529f\u80fd\u5b9e\u73b0\u3002<\/p>\n<p>\u597d\u7684\uff0c\u8fdb\u5165\u6211\u4eec\u7684\u5b9e\u8df5\u65f6\u95f4\uff0c\u6211\u4eec\u8fd8\u662f\u4ee5 D3.js \u529b\u5bfc\u5411\u56fe\u5bf9\u56fe\u6570\u636e\u5e93\u7684\u6570\u636e\u5173\u7cfb\u8fdb\u884c\u5206\u6790\u4e3a\u76ee\u7684\uff0c\u589e\u52a0\u4e00\u4e9b\u6211\u4eec\u60f3\u8981\u529f\u80fd\u3002<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u7528 d3-force \u529b\u5bfc\u5411\u56fe\u6765\u6784\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u5173\u8054\u7f51<\/p>\n<pre><code>this.force = d3         .forceSimulation()         \/\/ \u4e3a\u8282\u70b9\u5206\u914d\u5750\u6807         .nodes(data.vertexes)         \/\/ \u8fde\u63a5\u7ebf         .force('link', linkForce)         \/\/ \u6574\u4e2a\u5b9e\u4f8b\u4e2d\u5fc3         .force('center', d3.forceCenter(width \/ 2, height \/ 2))         \/\/ \u5f15\u529b         .force('charge', d3.forceManyBody().strength(-20))         \/\/ \u78b0\u649e\u529b \u9632\u6b62\u8282\u70b9\u91cd\u53e0         .force('collide',d3.forceCollide().radius(60).iterations(2)); <\/code><\/pre>\n<p>\u901a\u8fc7\u4e0a\u8ff0\u4ee3\u7801\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u4e0b\u9762\u8fd9\u6837\u4e00\u4e2a\u53ef\u89c6\u5316\u7684\u8282\u70b9\u548c\u5173\u7cfb\u56fe\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/07\/20200721_5f175f25512b6.png\" alt=\"D3.js \u529b\u5bfc\u5411\u56fe\u7684\u663e\u793a\u4f18\u5316\uff08\u4e8c\uff09- \u81ea\u5b9a\u4e49\u529f\u80fd\" \/><\/p>\n<p>\u8fd9\u91cc\u6211\u4eec\u7b80\u5355\u4ecb\u7ecd\u4e0b\u4e0a\u56fe\uff0c\u4e0a\u56fe\u4e3a\u56fe\u6570\u636e\u5e93 Nebula Graph \u53ef\u89c6\u5316\u5de5\u5177 Studio \u7684\u56fe\u63a2\u7d22\u529f\u80fd\u622a\u56fe\uff0c\u5728\u4e1a\u52a1\u4e0a\uff0c\u56fe\u63a2\u7d22\u652f\u6301\u7528\u6237\u4efb\u610f\u9009\u4e2d\u67d0\u4e2a\u70b9\u8fdb\u884c\u62d3\u5c55\uff0c\u627e\u5bfb\u3001\u663e\u793a\u540c\u5b83\u5b58\u5728\u67d0\u79cd\u5173\u7cfb\u7684\u70b9\uff0c\u4f8b\u5982\u4e0a\u56fe\u70b9 100 \u548c \u70b9 200 \u5b58\u5728\u5355\u5411 follow \u5173\u7cfb\u3002<\/p>\n<p>\u4e0a\u56fe\u6570\u636e\u91cf\u5e76\u4e0d\u5927\uff0c\u5982\u679c\u6211\u4eec\u5728\u62d3\u5c55\u65f6\u8fd4\u56de\u7684\u6570\u636e\u91cf\u8f83\u5927\u6216\u591a\u6b65\u62d3\u5c55\u51fa\u6765\u7684\u6570\u636e\u9010\u6b65\u7d2f\u52a0\u663e\u793a\uff0c\u5219\u4f1a\u5bfc\u81f4\u5f53\u524d\u89c6\u56fe\u9875\u8282\u70b9\u548c\u8fb9\u6781\u591a\uff0c\u9875\u9762\u9700\u5448\u73b0\u7684\u6570\u636e\u4fe1\u606f\u91cf\u5927\uff0c\u4e14\u4e5f\u4e0d\u597d\u627e\u5230\u60f3\u8981\u7684\u67d0\u4e2a\u8282\u70b9\u3002\u597d\u7684\uff0c\u4e00\u4e2a\u65b0\u573a\u666f\u4e0a\u7ebf\u4e86\uff1a\u7528\u6237\u53ea\u60f3\u5206\u6790\u56fe\u4e2d\u7684\u90e8\u5206\u8282\u70b9\u6570\u636e\uff0c\u4e0d\u60f3\u770b\u5230\u5168\u90e8\u7684\u8282\u70b9\u4fe1\u606f\u3002\u5220\u9664\u4efb\u610f\u9009\u4e2d\u8fd9\u4e2a\u65b0\u529f\u80fd\u5c31\u53ef\u4ee5\u5f88\u597d\u5730\u5e94\u5bf9\u4e0a\u9762\u573a\u666f\uff0c\u5220\u9664\u4e0d\u9700\u8981\u7684\u8282\u70b9\u4fe1\u606f\uff0c\u53ea\u7559\u4e0b\u60f3\u63a2\u7d22\u7684\u90e8\u5206\u8282\u70b9\u6570\u636e\u3002<\/p>\n<h2>\u652f\u6301\u5220\u9664\u4efb\u610f\u9009\u4e2d\u529f\u80fd<\/h2>\n<p>\u5728\u5b9e\u73b0\u8fd9\u4e2a\u529f\u80fd\u4e4b\u524d\uff0c\u6211\u5148\u5f00\u59cb\u4ecb\u7ecd\u4e0b D3.js \u81ea\u5e26 API \u3002\u6ca1\u9519\uff0c\u8fd8\u662f\u4e0a\u7bc7\u63d0\u53ca\u7684 D3.js \u7684 enter() \u53ca\u6ca1\u63d0\u5230\u7684 exit()<\/p>\n<p>\u6458\u81ea\u6587\u6863\u7684\u63cf\u8ff0\uff1a<\/p>\n<blockquote>\n<p>\u6570\u636e\u7ed1\u5b9a\u7684\u65f6\u5019\u53ef\u80fd\u51fa\u73b0 <code>DOM<\/code> \u5143\u7d20\u4e0e\u6570\u636e\u5143\u7d20\u4e2a\u6570\u4e0d\u5339\u914d\u7684\u95ee\u9898\uff0c <code>enter<\/code> \u548c <code>exit<\/code> \u5c31\u662f\u7528\u6765\u5904\u7406\u8fd9\u4e2a\u95ee\u9898\u7684\u3002<code>enter<\/code> \u64cd\u4f5c\u7528\u6765\u6dfb\u52a0\u65b0\u7684 <code>DOM<\/code> \u5143\u7d20\uff0c<code>exit<\/code> \u64cd\u4f5c\u7528\u6765\u79fb\u9664\u591a\u4f59\u7684 <code>DOM<\/code> \u5143\u7d20\u3002 \u5982\u679c\u6570\u636e\u5143\u7d20\u591a\u4e8e <code>DOM<\/code> \u4e2a\u6570\u65f6\u7528 <code>enter<\/code>\uff0c\u5982\u679c\u6570\u636e\u5143\u7d20\u5c11\u4e8e <code>DOM<\/code>\u5143\u7d20\uff0c\u5219\u7528 <code>exit<\/code>\u3002 \u5728\u6570\u636e\u7ed1\u5b9a\u65f6\u5019\u5b58\u5728\u4e09\u79cd\u60c5\u5f62\uff1a<\/p>\n<ul>\n<li>\u6570\u636e\u5143\u7d20\u4e2a\u6570\u591a\u4e8e <code>DOM<\/code> \u5143\u7d20\u4e2a\u6570<\/li>\n<li>\u6570\u636e\u5143\u7d20\u4e0e <code>DOM<\/code> \u5143\u7d20\u4e2a\u6570\u4e00\u6837<\/li>\n<li>\u6570\u636e\u5143\u7d20\u4e2a\u6570\u5c11\u4e8e <code>DOM<\/code> \u5143\u7d20\u4e2a\u6570<\/li>\n<\/ul>\n<\/blockquote>\n<p>\u6839\u636e\u6587\u6863\u63cf\u8ff0\uff0c\u60f3\u5b9e\u73b0\u5220\u9664\u4efb\u610f\u9009\u4e2d\u529f\u80fd\u8fd8\u662f\u5f88\u7b80\u5355\u7684\uff0c\u4e50\u89c2\u7684\u7b14\u8005\u60f3\u5f53\u7136\u5730\u8ba4\u4e3a\u76f4\u63a5\u5728\u6570\u636e\u5c42\u9762\u8fdb\u884c\u64cd\u4f5c\u5c31\u884c\u3002\u4e8e\u662f\u7b14\u8005\u76f4\u63a5\u5728 nodes \u6570\u636e\u91cc\u5220\u9664\u9009\u4e2d\u7684\u8282\u70b9\u6570\u636e node\uff0c\u7136\u540e\u6839\u636e\u5b98\u65b9\u7528\u6cd5 <code>d3.select(this.nodeRef).exit().remove()<\/code> \u79fb\u9664\u591a\u4f59\u7684\u5143\u7d20\uff0c\u597d\u7684\uff0c\u6211\u4eec\u73b0\u5728\u6765\u770b\u770b\u8fd9\u6837\u505a\u4f1a\u5e26\u6765\u4e86\u4ec0\u4e48\uff1f<\/p>\n<p>![D3 \u79fb\u9664\u5143\u7d20]( https:\/\/www-cdn.nebula-graph.com.cn\/nebula-blog\/D3 \u79fb\u9664\u5143\u7d20.png)<\/p>\n<p>\u4e0d\u60f3\u9009\u4e2d\u7684\u8282\u70b9\u662f\u5220\u9664\u4e86\uff0c\u4f46\u5176\u4ed6\u8282\u70b9\u7684\u663e\u793a\u4e5f\u4e71\u4e86\uff0c\u8282\u70b9\u989c\u8272\u548c\u5c5e\u6027\u540c\u5f53\u524d DOM \u8282\u70b9\u5bf9\u4e0d\u4e0a\uff0c\u4e3a\u4ec0\u4e48\u4f1a\u8fd9\u6837\u5462\uff1f\u7b14\u8005\u53c8\u4ed4\u4ed4\u7ec6\u7ec6\u5730\u770b\u4e86\u4e00\u904d\u4e0a\u9762\u7684\u6587\u6863\u63cf\u8ff0\uff0c\u7075\u5149\u4e00\u95ea\uff0c\u6765\uff0c\u5148\u6253\u5370\u4e0b exit().remove() \u7684\u8282\u70b9\uff0c\u770b\u770b\u5230\u5e95\u5b83 remove \u54ea\u4e9b\u8282\u70b9\uff1f<\/p>\n<p>\u679c\u7136\u662f\u5b83\uff0cD3.js enter().exit() \u7684\u89e6\u53d1\u5176\u5b9e\u662f\u5728\u76d1\u542c\u5143\u7d20\u7684\u4e2a\u6570\u7684\u53d8\u5316\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u603b\u4e2a\u6570\u7f3a\u5c11\u4e86\u4e24\u4e2a\uff0c\u5b83\u786e\u5b9e\u4f1a\u89e6\u53d1 exit() \u65b9\u6cd5\uff0c\u4f46\u662f\u5b83\u5904\u7406\u7684\u6570\u636e\u4e0d\u662f\u771f\u6b63\u9700\u5220\u9664\u7684\u6570\u636e\uff0c\u800c\u662f\u5f53\u524d nodes \u6570\u636e\u6700\u540e\u4e24\u4e2a\u8282\u70b9\u3002\u8bf4\u767d\u4e86 enter()\u3001exit() \u7684\u89e6\u53d1\u539f\u7406\uff0c\u662f D3.js \u76d1\u542c\u5f53\u524d\u6570\u636e\u7684\u957f\u5ea6\u53d8\u5316\u6765\u89e6\u53d1\u7684\u3002\u7136\u800c D3.js \u5728\u83b7\u53d6\u6570\u636e\u957f\u5ea6\u53d8\u5316\u4e4b\u540e\uff0c\u4ee5 exit() \u4e3a\u4f8b\uff0c\u5bf9\u5355\u4e2a\u6570\u636e\u7684\u5904\u7406\u65b9\u6cd5\u662f\u6839\u636e\u957f\u5ea6\u7684\u51cf\u91cf N \u622a\u53d6\u6570\u636e\u6570\u7ec4\u4f4d\u7f6e\u4e2d\u6700\u540e N \u4f4d\u5230\u6700\u540e\u4e00\u4f4d\u533a\u95f4\u7684\u6240\u6709\u5143\u7d20\uff0center() \u5219\u76f8\u53cd\uff0c\u4f1a\u5728\u6570\u7ec4\u4f4d\u7f6e\u4e2d\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u540e\u9762\u589e\u52a0 N \u4e2a\u6570\u636e\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u5982\u679c\u9009\u4e2d\u5220\u9664\u7684\u662f\u4e4b\u524d\u62d3\u5c55\u63a2\u7d22\u51fa\u6765\u7684\u8282\u70b9\uff08\u5b83\u4e0d\u662f\u5f53\u524d\u6570\u636e\u6570\u7ec4\u4f4d\u7f6e\u7684\u6700\u540e\u4e00\u4e2a\u5143\u7d20\uff09\uff0c\u8fdb\u884c\u5220\u9664\u64cd\u4f5c\u65f6\uff0c\u867d\u7136\u4ece\u6211\u4eec\u7684 nodes \u6570\u636e\u91cc\u9762\u5220\u9664\u4e86\u8fd9\u4e2a\u6570\u636e\uff0c\u4f46\u662f\u5728\u5df2\u7ecf\u5b58\u5728\u7684\u89c6\u56fe\u4e2d\uff0cd3.select(this.nodeRef).exit() \u65b9\u6cd5\u5b9a\u4f4d\u5230\u7684\u64cd\u4f5c\u5143\u7d20\u5374\u662f\u6700\u540e\u4e00\u4e2a\uff0c\u8fd9\u6837\u663e\u793a\u5c31\u4e71\u5957\u4e86\uff0c\u90a3\u4e48\uff0c\u6211\u4eec\u8be5\u5982\u4f55\u5904\u7406\u8fd9\u4e2a\u95ee\u9898\u5462\uff1f<\/p>\n<p>\u8fd9\u91cc\u5c31\u76f4\u63a5\u5206\u4eab\u4e0b\u6211\u7684\u65b9\u6cd5\uff0c\u7b80\u5355\u7c97\u66b4\u4f46\u6709\u6548\u2014\u2014\u663e\u7136\u8fd9\u4e2a exit() \u5e76\u4e0d\u80fd\u6ee1\u8db3\u5220\u9664\u9009\u4e2d\u8282\u70b9\u7684\u4e1a\u52a1\u9700\u6c42\uff0c\u90a3\u6211\u4eec\u5355\u72ec\u5730\u5904\u7406\u9700\u5220\u9664\u7684\u8282\u70b9\u3002\u6211\u4eec\u5b9a\u4f4d\u5230\u771f\u5b9e\u5220\u9664\u7684\u8282\u70b9 DOM \u8fdb\u884c\u64cd\u4f5c\uff0c\u4e3a\u6b64\u6211\u4eec\u9700\u8981\u5728\u6e32\u67d3\u65f6\u7ed9\u6bcf\u4e2a\u8282\u70b9\u7ed1\u5b9a\u4e00\u4e2a ID\uff0c\u7136\u540e\u518d\u8fdb\u884c\u904d\u5386\uff0c\u6839\u636e\u5df2\u5220\u9664\u7684\u8282\u70b9\u6570\u636e\u627e\u5230\u8fd9\u4e9b\u9700\u8981\u5220\u9664\u7684\u8282\u70b9\u5bf9\u5e94\u7684 DOM\uff0c\u4ee5\u4e0b\u4e3a\u6211\u4eec\u7684\u5904\u7406\u4ee3\u7801\uff1a<\/p>\n<pre><code>  componentDidUpdate(prevProps) {     const { nodes } = this.props;     if (nodes.length &lt; prevProps.nodes.length) {       const removeNodes = _.differenceBy(         prevProps.nodes,         nodes,         (v: any) =&gt; v.name,       );       removeNodes.forEach(removeNode =&gt; {         d3.select('#name_' + removeNode.name).remove();       });     } else {       this.labelRender(this.props.nodes);     }   } <\/code><\/pre>\n<p>\u5176\u5b9e\u5728\u8fd9\u91cc\u9700\u8981\u5904\u7406\u7684\u4e0d\u4ec5\u4ec5\u5b9a\u4f4d\u5230\u5f53\u524d\u771f\u5b9e\u5220\u9664\u8282\u70b9\u7684 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