使用JavaScript移动SVG'g'标签

Question

I know SVG <g> tag is not having X and Y Attributes, and the only way to transfer it is using transform like transform="translate(x,y)" and transform="rotate(45 50 50)" 我知道SVG <g>标记不具有X和Y属性，并且它是使用只有这样才能传送transform等transform="translate(x,y)"和transform="rotate(45 50 50)"

I'm trying to do the same programmable using JavaScript where I want to move a g tag having a combination of rect and text , below is my code, so what mistake I've so the g is not moving / translating once i click it? 我正在尝试使用JavaScript进行相同的编程，我想移动包含rect和text组合的g标签，下面是我的代码，所以我犯了什么错误，因此一旦单击g就不会移动/翻译？

 var NS="http://www.w3.org/2000/svg"; var SVG=function(h,w){ var svg=document.createElementNS(NS,"svg"); svg.width=w; svg.height=h; return svg; } var svg=SVG(1200,1500); document.body.appendChild(svg); class myRect { constructor(x,y,h,w,fill,name) { this.g= document.createElementNS(NS,"g"); this.name=name; this.SVGObj= document.createElementNS(NS,"rect"); self = this.SVGObj; self.x.baseVal.value=x; self.y.baseVal.value=y; self.width.baseVal.value=w; self.height.baseVal.value=h; self.style.fill=fill; this.text = document.createElementNS(NS, 'text'); this.text.setAttribute('x', x+10); this.text.setAttribute('y', y+20); this.text.setAttribute('fill', '#000'); this.text.textContent = '2'; this.g.appendChild(self); this.g.appendChild(this.text) this.g.addEventListener("click",this,false); } } Object.defineProperty(myRect.prototype, "node", { get: function node() { return this.g; // this.SVGObj; } }); myRect.prototype.handleEvent= function(evt){ self = this.g; switch (evt.type){ case "click": // alert(this.name); // this.animate(); if (typeof self.moving == 'undefined' || self.moving == false) self.moving = true; else self.moving = false; if(self.moving == true) self.move = setInterval(()=>this.animate(),100); else{ clearInterval(self.move); self.parentNode.removeChild(self); } break; default: break; } } myRect.prototype.animate = function() { self = this.g; self.transform="translate(200,200)"; // self.x.baseVal.value+=1; // self.y.baseVal.value+=1; }; var r= new myRect(50,50,30,30,'#'+Math.round(0xffffff * Math.random()).toString(16),'this is my name'); svg.appendChild(r.node);

UPDATE I tried self.setAttribute('transform','translate(10,10)') but did not work, I was able to make ONE step ONE time only move using the self.setAttribute('transform','translate(10,10)'); 更新我尝试了self.setAttribute('transform','translate(10,10)')但没有用，我只能使用self.setAttribute('transform','translate(10,10)');使一步一步self.setAttribute('transform','translate(10,10)'); where getItem(0) gets the first element in a transform attribute eg transform="translate(1, 1) scale(2)" where getItem(0) gets the translate(1, 1) matrix and getItem(1) gets the scale(2) as explained here 其中getItem（0）获取转换属性中的第一个元素，例如transform="translate(1, 1) scale(2)" ，其中getItem(0)获取translate(1, 1)矩阵，而getItem(1)获取scale(2)所说明这里

But this is still not what I need, I need continuous movement once I click the g till the loop is over. 但这仍然不是我需要的，单击g直到循环结束，我需要连续移动。

Answer 1

<html>

<body>
<div class="svg"></div>
</body>
<script>
var NS="http://www.w3.org/2000/svg";     
var SVG=function(h,w){
    var svg=document.createElementNS(NS,"svg");
    svg.width=w;
    svg.height=h;
return svg;
}
var svg=SVG(1200,1500);
var div =document.querySelector(".svg");
div.appendChild(svg);

class myRect {
  constructor(x,y,h,w,fill,name) {
   this.g= document.createElementNS(NS,"g");
   this.name=name;
   this.SVGObj= document.createElementNS(NS,"rect");
   self = this.SVGObj;
      self.x.baseVal.value=x;
      self.y.baseVal.value=y;
      self.width.baseVal.value=w;
      self.height.baseVal.value=h;
      self.style.fill=fill;

    this.text = document.createElementNS(NS, 'text');
    this.text.setAttribute('x', x+10);
    this.text.setAttribute('y', y+20);
    this.text.setAttribute('fill', '#000');
    this.text.textContent = '2';

    this.g.appendChild(self);
    this.g.appendChild(this.text)

    this.g.addEventListener("click",this,false);
  }
}

Object.defineProperty(myRect.prototype, "node", {
get: function node() {
    return this.g; // this.SVGObj;
}
});

myRect.prototype.handleEvent= function(evt){
self = this.g;
  switch (evt.type){
    case "click":
       // alert(this.name); // this.animate();    
       if (typeof self.moving == 'undefined' || self.moving == false) self.moving = true;
       else self.moving = false;

     if(self.moving == true)
       self.move = setInterval(()=>this.animate(evt),100);
       else{
       clearInterval(self.move); 
       self.parentNode.removeChild(self);
       }        
    break;
    default:
    break;
 }
}  

myRect.prototype.animate = function(evt) {
       self = this.g;
       var recElement=self.childNodes[0];
       recElement.setAttribute("x",10);
       recElement.setAttribute("y",10);
       //self.transform="translate(200,200)";

};

    var r= new myRect(50,50,30,30,'#'+Math.round(0xffffff * Math.random()).toString(16),'this is my name');
    svg.appendChild(r.node);


    </script>

Answer 2

Thanks to Mike Williamson , I was able to solve it developing a customs transform function: 感谢Mike Williamson ，我得以开发出海关转换功能来解决该问题：

myRect.prototype.step = function(x,y) {
  return svg.createSVGTransformFromMatrix(svg.createSVGMatrix().translate(x,y));
}

and call it by: 并通过以下方式致电：

myRect.prototype.animate = function() {
   self = this.g;
   self.transform.baseVal.appendItem(this.step(1,1));
};

The full code, for any one interested, is: 对于任何感兴趣的人，完整的代码是：

var NS="http://www.w3.org/2000/svg";  
var SVG=function(el){
   return document.createElementNS(NS,el);
}

var svg = SVG("svg");
    svg.width='100%';
    svg.height='100%';
document.body.appendChild(svg);

class myRect {
     constructor(x,y,h,w,fill,name) {
     this.g= SVG("g");
     this.name=name;
     this.SVGObj= SVG('rect'); // document.createElementNS(NS,"rect");
        self = this.SVGObj;
        self.x.baseVal.value=x;
        self.y.baseVal.value=y;
        self.width.baseVal.value=w;
        self.height.baseVal.value=h;
        self.style.fill=fill;
        self.onclick="click(evt)";

this.text = SVG('text');
this.text.setAttribute('x', x+10);
this.text.setAttribute('y', y+20);
this.text.setAttribute('fill', '#000');
this.text.textContent = name;

this.g.appendChild(self);
// this.g.appendChild(this.text); // if required to be loaded from start up

this.g.addEventListener("click",this,false);
//(e)=>alert(e.target.parentNode.parentNode); / this is to check what is clicked
  }
}

Object.defineProperty(myRect.prototype, "node", {
   get: ()=> return this.g;
});

myRect.prototype.handleEvent= function(evt){
  self = evt.target.parentNode;  // this returns the `g` element
  switch (evt.type){
      case "click":   
          if (typeof self.moving == 'undefined' || self.moving == false) self.moving = true;
          else self.moving = false;

 if(self.moving == true){
 self.move = setInterval(()=>this.animate(),100);
 self.appendChild(this.text); // show the text node

 }

  else{
   clearInterval(self.move);
   self.removeChild(self.childNodes[1]); // remove the text node
 //  self.parentNode.removeChild(self);  // This removes the `g` element completly
  }        
break;
   default:
   break;
 }
}  

 myRect.prototype.step = function(x,y) {
    return svg.createSVGTransformFromMatrix(svg.createSVGMatrix().translate(x,y));
 }

 myRect.prototype.animate = function() {
   self = this.g;
   self.transform.baseVal.appendItem(this.step(1,1));
 };

 for (var i = 0; i < 10; i++) {
   var x = Math.random() * 100,
       y = Math.random() * 300;
  var r= new myRect(x,y,10,10,'#'+Math.round(0xffffff * Math.random()).toString(16),'click to stop');
   svg.appendChild(r.node);
  }

it is also available at JSFiddle 它也可以在JSFiddle上获得

使用JavaScript移动SVG'g'标签

问题描述

2 个解决方案

解决方案1
0 2016-07-13 18:01:34

解决方案2
0 已采纳 2016-07-14 09:26:37

使用JavaScript移动SVG&#39;g&#39;标签

问题描述

2 个解决方案

解决方案1 0 2016-07-13 18:01:34

解决方案2 0 已采纳 2016-07-14 09:26:37

使用JavaScript移动SVG'g'标签

解决方案1
0 2016-07-13 18:01:34

解决方案2
0 已采纳 2016-07-14 09:26:37