just another inlet to tributary

inlet.js

var Baushaus = function(){
	this.svg = g;
}
//datatelling.com
Baushaus.prototype.mergeOptions = function(element, options){ for(option in options){ element.attr(option,options[option]); } };     
Baushaus.prototype.circle = function(r,x,y,options){ 
  var elem = this.svg.append('circle').attr('r',r);
  elem.attr('cx',x)
  elem.attr('cy',y)  
  if(options) this.mergeOptions(elem,options);
  return elem;  
};
Baushaus.prototype.rect   = function(w,h,options){ return this.svg.append('rect').attr('width',w).attr('height',h) };
Baushaus.prototype.square = function(s,options){   return this.svg.append('rect').attr('width',s).attr('height',s)};

var b = new Baushaus();

b.circle(54,167,147)
b.circle(113,374,147)  
  
  var fo = g.append("foreignObject")
    .attr("width", 100)
    .attr("height", 14)
   .append("xhtml:body")	
   fo.append('input').attr('id','content')
 
g.append('rect')
  .attr('width',49)
  .attr('height',55)
  .attr('fill','red')
  .on('click', function(){
  var val = $('#content').val()
  parseCommand(val)
  $('#content').val('')  
     
  })

  var drag = d3.behavior.drag().on("drag", function(d,i){ 
    d.x += d3.event.dx; 
    d.y += d3.event.dy;
    d3.select(this).attr("transform", "translate(" + d.x + "," + d.y + ")");})  
  
  function parseCommand(val){
  	var split = val.split(' ') // Split the input
    var command = split[0]  // Get Command
        
    if(command=='rect'){
      var rect = g.append('rect').attr('width',50).attr('height',50).attr('x',100).attr('y',100).attr('class','drag').data([{x: 0, y: 0}])
       rect.call(drag)
	  if(rect && split[1]) rect.attr('width',split[1]) 
      if(rect && split[2]) rect.attr('height',split[2])         		      
    }

    if(command=='circle'){
      var circle = g.append('circle').attr('r',50).attr('cx',100).attr('cy',100).attr('class','drag').data([{x: 0, y: 0}])
      circle.call(drag)
	  if(circle && split[1]) circle.attr('r',split[1]) 
      if(circle && split[2]) circle.attr('fill',split[2])         		      
    }    
    
  
  }