1.raphael.js svg画图的开源库,支持IE8+
官方api: http://dmitrybaranovskiy.github.io/raphael/reference.html
Github地址: https://github.com/DmitryBaranovskiy/raphael/
2.js引用
//raphael.js主库
<script src="./raphael.js" type="text/javascript"></script>
  //raphael.js扩展库,可实现局部元素拖拽,背景画布拖拽缩放等
   <script src="./raphael.extension.js" type="text/javascript"></script>
3.初始化
假设页面上有两个画布需要同时绘制
  <div id="main1" class="main main1" style="width:250px;height:300px;">
  </div>
  <div id="main2" class="main main2" style="width:250px;height:300px;">
  </div>
js初始化部分:
  var paper1=Raphael.createNew(document.getElementsByClassName(‘main‘)[0], 500, 400);
  var paper2=Raphael.createNew(document.getElementsByClassName(‘main‘)[1], 500, 400);
//第一个参数(必选)为绘制主函数,此处设置为init函数(具体实现在下方),
//第二个参数(可选)为true表示每次绘制清除画布,false不清除画布,
//第三个参数(可选)为任意类型,是用户传给绘制主函数的自定义额外参数。
  paper1.draw(init,true,{type:"post"});
  paper2.draw(init);
//绘制主函数的实现,第一个参数(必选)为当前raphael实例,第二个参数(可选)为用户自定义额外参数(与上方draw函数的第三个参数对应)
  function init(paper,data){
    console.log("start ,extra params:",data);
    //画圆
   var cir1=paper.circle(15,15,10).attr({   
     fill:"red", //填充色
     stroke:"blue", //边缘线
     "stroke-width":4 //
    });
   //矩形,起始点x,y,width,height
   var rect1=paper.rect(40,25,60,40).attr({fill:"red",stroke:"green"});
   var rect2=paper.rect(110,25,60,40,5).attr({fill:"red",stroke:"green"});
  //椭圆
   var ellipse1 = paper.ellipse(15,55,10,20).attr({   
    "fill":"#17A9C6", // background color of the ellipse   
    "stroke":"#2A6570", // ellipse‘s border color   
    "stroke-width":2 // border width  
   });
   //M	移动到(moveTo)	(x y)+
   //Z	闭合路径(closepath)	(none)
   //L	直线(lineTo)	(x y)+
   //H	水平直线	x+
   //V	垂直直线	y+
   //C	曲线(curveto)	(x1 y1 x2 y2 x y)+
   //S	平滑曲线	(x2 y2 x y)+
   //Q	二次贝赛尔曲线	(x1 y1 x y)+
   //T	平滑二次贝塞尔曲线	(x y)+
   //A	椭圆弧	(rx ry x-axis-rotation large-arc-flag sweep-flag x y)+
   //R	Catmull-Rom 曲线*	x1 y1 (x y)+
   
//绘制路径
    paper.path("M 40,40 H 90 V 60 H 70 V 110 H 60 V 60 H 40 z").attr({  
     "fill": "#5DDEF4",  
     "stroke": "#2A6570",  
     "stroke-width": 2  
    });
   //2、三角形使用Path命令L  
   paper.path("M130,30 L200,30 L160,90 z").attr({  
     "fill": "#5DDEF4",  
     "stroke": "#2A6570",  
     "stroke-width": 2  
   });  
   //3、T形使用Path命令H,V  
   paper.path("M 40,40 H 90 V 60 H 70 V 110 H 60 V 60 H 40 z").attr({  
      "fill": "#5DDEF4",  
      "stroke": "#2A6570",  
      "stroke-width": 2  
    }); 
   //4、2次贝塞尔曲线形,使用path命令Q  
   paper.path("M240,40L300,40L300,100");  
   paper.path("M240,40Q300,40 300,100").attr(‘stroke‘, ‘red‘);  
   //5、2次贝塞尔曲线形,使用path命令Q和T(第一个是正常绘制,第二个光滑连接)    
   paper.path(‘M10,250 L90,130 L160,160 L250,190 L250,70‘);  
   paper.path(‘M10,250 Q90,130 160,160 T250,70‘).attr(‘stroke‘, ‘red‘);  
   //6、绘制3次贝赛尔曲线,使用命令C,平滑画线使用命令S  
   paper.path(‘M320,120 L350,180 L450,260 L480,140‘);  
   paper.path(‘M320,120 C350,180 450,260 480,140‘).attr(‘stroke‘, ‘red‘);  
   paper.path(‘M320,120 S450,260 480,140‘).attr(‘stroke‘, ‘yellow‘);  
   //transform
   //T 平移|S 缩放 | R 按角度旋转| M 变换矩阵
    var rect2=paper.rect(110,95,60,40,5).attr({fill:"red",stroke:"green"}).transform("r90t20,0");
   //rect2.animate(  
   // { "width":"300", "height":"200" },  
   //  500,  
   //  ‘bounce‘,  
   //  function(){  }  
   //);  
   var text1=paper.text(110,195,"你");//.attr({"font-size":"10px"});
   var text1=paper.text(120,195,"好");
			
   var rect3=paper.rect(110,195,60,40,5).attr({fill:"red",stroke:"green"});
   //“linear”(线性)
   //“<”或“easeIn”或“ease-in” (由慢到快)
   //“>”或“easeOut”或“ease-out”(又快到慢)
   //“<>”或“easeInOut”或“ease-in-out”(由慢到快再到慢)
   //“backIn”或“back-in”(开始时回弹)
   //“backOut”或“back-out”(结束时回弹)
   //“elastic”(橡皮筋)
   //“bounce”(弹跳)
   //rect3.animate({
   //	transform: "r90,110,195t100,0s1.5"
   //},2000,"backOut",function(){console.log("finish");})
   //rect3.click(function(){  
   //	alert("hahah!");  
   //  });
  rect3.data({
    id:1, 
    name:"n1"
   });
  rect3.data({
    id:2,
    type:"test"
   })
  rect3.removeData("id") 
  rect3.dblclick(function(){   
     alert("It‘s a double click !"+rect3.data("name"));  
  })		
			
   var cir2=paper.circle(110,250,30);
   var newCircle2=cir2.clone();
   var newBBox2=newCircle2.getBBox();
   console.log(newBBox2)
    paper.rect(newBBox2.x,newBBox2.y,newBBox2.width,newBBox2.height);
   //toFront() 、toBack() 、hide() 、show() 、remove()
   //清空
  //paper.clear()
  var img1=paper.image("./favicon.ico",105,245,10,10); 
  paper.setSize(600,800);  
			
   var raphaelSet = paper.set();  
   raphaelSet.push(rect3,cir2);  
   //  raphaelSet.splice(1, 1, cir, cir1, cir2);  
   raphaelSet.forEach(function(ele){  
     ele.attr({  
        "fill": "red"  
     });  
      console.log(ele[0]);  
   })
  //raphaelSet.clear()
   raphaelSet.attr({  
     "fill": "red"  
    }); 
   console.log("paper",paper);
    paper.setViewBox(00,0,200,200,false)
   //paper.scale(1.3,1.3);
   //元素可拖拽
    img1.draggable();
			     //背景画布可拖拽
    paper.draggable();
    text1.toFront()
    setTimeout(function(){
       text1.animate({
         transform:"r360,115,200t10,25",
         "font-size":30
       },3000)
    },3000)
     window.paper=paper;
   }
//缩放函数
   function zoom(num,paper){
     var paper=paper || window.paper;
     if(num>0 ){
         paper.zoomIn();
      }
      if(num<0 ){
         paper.zoomOut();
       }
       if(num==0){
          paper.zoom(1);
        }
   }
4.实例应用
偶然在一个商业js项目里找到一幅世界地图的json文件,借此试了试raphael的效率如何。
贴出代码:
<!DOCTYPE html> <html> <head> <title></title> <meta charset="UTF-8" /> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <meta http-equiv=X-UA-Compatible content="IE=edge"> <style> canvas { width: 100%; height: 100%; } body { overflow: hidden; padding: 0; } .main { width: 100%; height: 100%; padding: 0px; margin: auto; overflow: hidden; border: 1px solid yellow; } </style> </head> <body> <div id="main1" class="main main1"> </div> <!-- 在此用jquery主要是为了map.json文件的读取及数组遍历省事 --> <script src="./jquery-2.2.0.js" type="text/javascript"></script> <script src="./raphael.js" type="text/javascript"></script> <script src="./raphael.extension.js" type="text/javascript"></script> <!-- http://www.hightopo.com/demo/large-screen/index.html --> <script src="./map.json"></script> <script type="text/javascript"> function train(result) { console.log(result) } function init(paper, data) { console.log("start", data, window.jsonFile); var map = window.jsonFile; $.each(map.comps, function(i, e) { var pathStr = ""; $.each(e.points, function(ii, ee) { if (ii == 0) { pathStr = "M" + ee; } else { if (e.segments) { if (ii % 2 == 0 && e.segments[ii / 2] == 1) { pathStr += ",M" + ee; } else if (ii % 2 == 0 && e.segments[ii / 2] != 1) { pathStr += ",L" + ee; } else if (ii % 2 != 0) { pathStr += "," + ee; } } else { if (ii % 2 == 0) { pathStr += ",L" + ee; } else { pathStr += "," + ee; } } } }); paper.path(pathStr) .attr({ "stroke-width": e.borderWidth, stroke: e.borderColor, }) }); paper.draggable(); } var paper1 = Raphael.createNew(document.getElementsByClassName(‘main‘)[0], $(window).width(), $(window).height()); paper1.draw(init, true, { type: "post" }); //setInterval(function(){ // paper1.draw(init,true); // paper2.draw(init,true); //},2000); </script> </body> </html>
效果展示;
  
原文:https://www.cnblogs.com/RexSheng/p/8963574.html