Added `relative()`method for relative translations

10 files changed, 188 insertions, 8 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0fbf26c..8bd27bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-# v1.0rc1 (30/01/2014)
+# v1.0rc1 (31/01/2014)
 
 - added `SVG.PathArray` for real path transformations
 - removed `unbiased` system for paths
@@ -6,6 +6,8 @@
 - enabled proportional resizing on `size()` method with `null` for either `width` or `height` values
 - moved data module to separate file
 - `data()` method now accepts object for for multiple key / value assignments
+- added `bbox()` method to `SVG.Set`
+- added `relative()` method for moves relative to the current position
 
 # v0.38 (28/01/2014)
 
diff --git a/README.md b/README.md
index 04acf52..138ea7c 100644
--- a/README.md
+++ b/README.md
@@ -725,6 +725,17 @@ The third argument can be used to move the text element by its anchor point rath
 rect.x(200, true).y(350, true)
 ```
 
+### relative()
+The `move()`, `x()` and `y()` methods move an element to an absolute position. With the `relative()` method, elements can be moved relatively to their current position. This can be done by calling the `relative()` method before the `move()`, `x()` or `y()` methods in the method chain:
+
+```javascript
+rect.move(100, 100).relative().move(20, -50)
+```
+
+This will set the `x` position of the element to `120` and the `y` position to `50`.
+
+It works the same way for `relative().x()` and  `relative().y()`.
+
 
 ### center(), cx() and cy()
 This is an extra method to move an element by its center:
@@ -1474,6 +1485,13 @@ Get the element at a given index:
 set.get(1)
 ```
 
+### bbox()
+Get the bounding box of all elements in the set:
+
+```javascript
+set.bbox()
+```
+
 ### remove()
 To remove an element from a set:
 
diff --git a/Rakefile b/Rakefile
index 3167010..1cb3b1f 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,7 +1,7 @@
 SVGJS_VERSION = 'v1.0rc1'
 
 # all available modules in the correct loading order
-MODULES = %w[ svg regex default color array pointarray patharray arraycache number viewbox bbox rbox element parent container fx event defs group arrange mask clip gradient doc shape use rect ellipse line poly path image text textpath nested hyperlink sugar set data memory loader ]
+MODULES = %w[ svg regex default color array pointarray patharray arraycache number viewbox bbox rbox element parent container fx relative event defs group arrange mask clip gradient doc shape use rect ellipse line poly path image text textpath nested hyperlink sugar set data memory loader ]
 
 # how many bytes in a "kilobyte"
 KILO = 1024
diff --git a/dist/svg.js b/dist/svg.js
index e561ada..1ae7212 100644
--- a/dist/svg.js
+++ b/dist/svg.js
@@ -1,4 +1,4 @@
-/* svg.js v1.0rc1-3-g0a16576 - svg regex default color array pointarray patharray arraycache number viewbox bbox rbox element parent container fx event defs group arrange mask clip gradient doc shape use rect ellipse line poly path image text textpath nested hyperlink sugar set data memory loader - svgjs.com/license */
+/* svg.js v1.0rc1-4-gf6fc666 - svg regex default color array pointarray patharray arraycache number viewbox bbox rbox element parent container fx relative event defs group arrange mask clip gradient doc shape use rect ellipse line poly path image text textpath nested hyperlink sugar set data memory loader - svgjs.com/license */
 ;(function() {
 
   this.SVG = function(element) {
@@ -2060,6 +2060,34 @@
             function (c) { window.setTimeout(c, 1000 / 60) }
   })()
 
+  SVG.extend(SVG.Element, SVG.FX, {
+    // Relative methods
+    relative: function() {
+      var b, e = this
+  
+      return {
+        // Move over x axis
+        x: function(x) {
+          b = e.bbox()
+  
+          return e.x(b.x + (x || 0))
+        }
+        // Move over y axis
+      , y: function(y) {
+          b = e.bbox()
+  
+          return e.y(b.y + (y || 0))
+        }
+        // Move over x and y axes
+      , move: function(x, y) {
+          this.x(x)
+          return this.y(y)
+        }
+      }
+    }
+  
+  })
+
   ;[  'click'
     , 'dblclick'
     , 'mousedown'
@@ -3357,6 +3385,28 @@
   , valueOf: function() {
       return this.members
     }
+    // Get the bounding box of all members included or empty box if set has no items
+  , bbox: function(){
+      var box = new SVG.BBox()
+  
+      /* return an empty box of there are no members */
+      if (this.members.length == 0)
+        return box
+  
+      /* get the first rbox and update the target bbox */
+      var rbox = this.members[0].rbox()
+      box.x      = rbox.x
+      box.y      = rbox.y
+      box.width  = rbox.width
+      box.height = rbox.height
+  
+      this.each(function() {
+        /* user rbox for correct position and visual representation */
+        box = box.merge(this.rbox())
+      })
+  
+      return box
+    }
   
   })
   
diff --git a/dist/svg.min.js b/dist/svg.min.js
index 88adc4f..75611b9 100644
--- a/dist/svg.min.js
+++ b/dist/svg.min.js
@@ -1,2 +1,2 @@
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t=document.getElementsByTagName("body")[0]||document.getElementsByTagName("svg")[0],e=SVG.create("svg"),i=SVG.create("polygon"),n=SVG.create("path");e.setAttributeNS(SVG.xmlns,"xmlns:xlink",SVG.xlink),e.setAttribute("style","opacity:0;position:fixed;left:100%;top:100%"),e.setAttribute("width","2"),e.setAttribute("height","2"),t.appendChild(e),e.appendChild(i),e.appendChild(n),SVG.parser={body:t,doc:e,poly:i,path:n}},SVG.supported=function(){return!!document.createElementNS&&!!document.createElementNS(SVG.ns,"svg").createSVGRect}(),!SVG.supported)return!1;SVG.regex={test:function(t,e){return this[e].test(t)},unit:/^(-?[\d\.]+)([a-z%]{0,2})$/,hex:/^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i,rgb:/rgb\((\d+),(\d+),(\d+)\)/,isHex:/^#[a-f0-9]{3,6}$/i,isRgb:/^rgb\(/,isCss:/[^:]+:[^;]+;?/,isStyle:/^font|text|leading|cursor/,isBlank:/^(\s+)?$/,isNumber:/^-?[\d\.]+$/,isPercent:/^-?[\d\.]+%$/},SVG.defaults={matrix:"1 0 0 1 0 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this._cx={from:this.target.cx(),to:t},this},cy:function(t){return this._cy={from:this.target.cy(),to:t},this},move:function(t,e){return this.x(t).y(e)},center:function(t,e){return this.cx(t).cy(e)},size:function(t,e){if(this.target instanceof SVG.Text)this.attr("font-size",t);else{var i=this.target.bbox();this._size={width:{from:i.width,to:t},height:{from:i.height,to:e}}}return this},plot:function(t){return this._plot=t,this},viewbox:function(t,e,i,n){if(this.target instanceof SVG.Container){var r=this.target.viewbox();this._viewbox={x:{from:r.x,to:t},y:{from:r.y,to:e},width:{from:r.width,to:i},height:{from:r.height,to:n}}}return this},update:function(t){return this.target instanceof SVG.Stop&&(null!=t.opacity&&this.attr("stop-opacity",t.opacity),null!=t.color&&this.attr("stop-color",t.color),null!=t.offset&&this.attr("offset",new SVG.Number(t.offset))),this},during:function(t){return this._during=t,this},after:function(t){return this._after=t,this},loop:function(t){return this._loop=t||!0,this},stop:function(){return clearTimeout(this.timeout),clearInterval(this.interval),this.attrs={},this.trans={},this.styles={},this.situation={},delete this._x,delete this._y,delete this._cx,delete this._cy,delete this._size,delete this._plot,delete this._loop,delete this._after,delete this._during,delete this._viewbox,this},pause:function(){return this.situation.play===!0&&(this.situation.play=!1,this.situation.pause=(new Date).getTime()),this},play:function(){if(this.situation.play===!1){var t=(new Date).getTime()-this.situation.pause;this.situation.finish+=t,this.situation.start+=t,this.situation.play=!0}return this},_at:function(t,e){return"number"==typeof t.from?t.from+(t.to-t.from)*e:SVG.regex.unit.test(t.to)?new SVG.Number(t.to).minus(new SVG.Number(t.from)).times(e).plus(new SVG.Number(t.from)):t.to&&(t.to.r||SVG.Color.test(t.to))?this._color(t,e):1>e?t.from:t.to},_color:function(t,e){var i,n;return e=0>e?0:e>1?1:e,i=new SVG.Color(t.from),n=new SVG.Color(t.to),new SVG.Color({r:~~(i.r+(n.r-i.r)*e),g:~~(i.g+(n.g-i.g)*e),b:~~(i.b+(n.b-i.b)*e)}).toHex()}}),SVG.extend(SVG.Element,{animate:function(t,e,i){return(this.fx||(this.fx=new SVG.FX(this))).stop().animate(t,e,i)},stop:function(){return this.fx&&this.fx.stop(),this},pause:function(){return this.fx&&this.fx.pause(),this},play:function(){return this.fx&&this.fx.play(),this}}),window.requestAnimFrame=function(){return window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||function(t){window.setTimeout(t,1e3/60)}}(),["click","dblclick","mousedown","mouseup","mouseover","mouseout","mousemove","mouseenter","mouseleave"].forEach(function(t){SVG.Element.prototype[t]=function(e){var i=this;return this.node["on"+t]="function"==typeof e?function(){return 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this.defs().gradient(t,e)}}),SVG.Stop=function(t){this.constructor.call(this,SVG.create("stop")),this.update(t)},SVG.Stop.prototype=new SVG.Element,SVG.extend(SVG.Stop,{update:function(t){return null!=t.opacity&&this.attr("stop-opacity",t.opacity),null!=t.color&&this.attr("stop-color",t.color),null!=t.offset&&this.attr("offset",new SVG.Number(t.offset)),this}}),SVG.Doc=function(t){this.parent="string"==typeof t?document.getElementById(t):t,this.constructor.call(this,"svg"==this.parent.nodeName?this.parent:SVG.create("svg")),this.attr({xmlns:SVG.ns,version:"1.1",width:"100%",height:"100%"}).attr("xmlns:xlink",SVG.xlink,SVG.xmlns),this._defs=new SVG.Defs,this._defs.parent=this,this.node.appendChild(this._defs.node),this.doSubPixelOffsetFix=!1,"svg"!=this.parent.nodeName&&this.stage()},SVG.Doc.prototype=new SVG.Container,SVG.extend(SVG.Doc,{stage:function(){var t,e=this,i=document.createElement("div");return 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this._cachedBBox?this._cachedBBox:(SVG.parser.poly.setAttribute("points",this.toString()),SVG.parser.poly.getBBox())}}),SVG.PathArray=function(t,e){this.constructor.call(this,t,e)},SVG.PathArray.prototype=new SVG.Array,SVG.extend(SVG.PathArray,{toString:function(){for(var t,e=0,i=this.value.length,n=[];i>e;e++){switch(t=[this.value[e].type],this.value[e].type){case"H":t.push(this.value[e].x);break;case"V":t.push(this.value[e].y);break;case"M":case"L":case"T":case"S":case"Q":case"C":/[QC]/.test(this.value[e].type)&&t.push(this.value[e].x1,this.value[e].y1),/[CS]/.test(this.value[e].type)&&t.push(this.value[e].x2,this.value[e].y2),t.push(this.value[e].x,this.value[e].y);break;case"A":t.push(this.value[e].rx,this.value[e].ry,this.value[e].angle,this.value[e].largeArcFlag,this.value[e].sweepFlag,this.value[e].x,this.value[e].y)}n.push(t.join(" "))}return n.join(" ")},move:function(t,e){var i=this.bbox();if(t-=i.x,e-=i.y,!isNaN(t)&&!isNaN(e))for(var n=this.value.length-1;n>=0;n--)switch(this.value[n].type){case"H":this.value[n].x+=t;break;case"V":this.value[n].y+=e;break;case"M":case"L":case"T":case"S":case"Q":case"C":this.value[n].x+=t,this.value[n].y+=e,/[CQ]/.test(this.value[n].type)&&(this.value[n].x1+=t,this.value[n].y1+=e),/[CS]/.test(this.value[n].type)&&(this.value[n].x2+=t,this.value[n].y2+=e);break;case"A":this.value[n].x+=t,this.value[n].y+=e}return this},size:function(t,e){for(var i=this.bbox(),n=this.value.length-1;n>=0;n--)switch(this.value[n].type){case"H":this.value[n].x=(this.value[n].x-i.x)*t/i.width+i.x;break;case"V":this.value[n].y=(this.value[n].y-i.y)*e/i.height+i.y;break;case"M":case"L":case"T":case"S":case"Q":case"C":this.value[n].x=(this.value[n].x-i.x)*t/i.width+i.x,this.value[n].y=(this.value[n].y-i.y)*e/i.height+i.y,/[CQ]/.test(this.value[n].type)&&(this.value[n].x1=(this.value[n].x1-i.x)*t/i.width+i.x,this.value[n].y1=(this.value[n].y1-i.y)*e/i.height+i.y),/[CS]/.test(this.value[n].type)&&(this.value[n].x2=(this.value[n].x2-i.x)*t/i.width+i.x,this.value[n].y2=(this.value[n].y2-i.y)*e/i.height+i.y);break;case"A":this.value[n].values.rx=this.value[n].values.rx*t/i.width,this.value[n].values.ry=this.value[n].values.ry*e/i.height,this.value[n].values.x=(this.value[n].values.x-i.x)*t/i.width+i.x,this.value[n].values.y=(this.value[n].values.y-i.y)*e/i.height+i.y}return this},parse:function(t){if(t=t.valueOf(),Array.isArray(t))return t;var e,i,n,r,s,h,o,a,u,l,c,f=0,p=0;for(SVG.parser.path.setAttribute("d",t),c=SVG.parser.path.pathSegList,e=0,i=c.numberOfItems;i>e;++e){if(l=c.getItem(e),u=l.pathSegTypeAsLetter,/[MLHVCSQTA]/.test(u))"x"in l&&(f=l.x),"y"in l&&(p=l.y);else switch("x1"in l&&(s=f+l.x1),"x2"in l&&(o=f+l.x2),"y1"in l&&(h=p+l.y1),"y2"in l&&(a=p+l.y2),"x"in l&&(f+=l.x),"y"in l&&(p+=l.y),u){case"m":c.replaceItem(SVG.parser.path.createSVGPathSegMovetoAbs(f,p),e);break;case"l":c.replaceItem(SVG.parser.path.createSVGPathSegLinetoAbs(f,p),e);break;case"h":c.replaceItem(SVG.parser.path.createSVGPathSegLinetoHorizontalAbs(f),e);break;case"v":c.replaceItem(SVG.parser.path.createSVGPathSegLinetoVerticalAbs(p),e);break;case"c":c.replaceItem(SVG.parser.path.createSVGPathSegCurvetoCubicAbs(f,p,s,h,o,a),e);break;case"s":c.replaceItem(SVG.parser.path.createSVGPathSegCurvetoCubicSmoothAbs(f,p,o,a),e);break;case"q":c.replaceItem(SVG.parser.path.createSVGPathSegCurvetoQuadraticAbs(f,p,s,h),e);break;case"t":c.replaceItem(SVG.parser.path.createSVGPathSegCurvetoQuadraticSmoothAbs(f,p),e);break;case"a":c.replaceItem(SVG.parser.path.createSVGPathSegArcAbs(f,p,l.r1,l.r2,l.angle,l.largeArcFlag,l.sweepFlag),e);break;case"z":case"Z":f=n,p=r}/[Mm]/.test(u)&&(n=f,r=p)}for(t=[],c=SVG.parser.path.pathSegList,e=0,i=c.numberOfItems;i>e;++e){switch(l=c.getItem(e),u={},l.pathSegTypeAsLetter){case"M":case"L":case"T":case"S":case"Q":case"C":/[QC]/.test(l.pathSegTypeAsLetter)&&(u.x1=l.x1,u.y1=l.y1),/[SC]/.test(l.pathSegTypeAsLetter)&&(u.x2=l.x2,u.y2=l.y2);break;case"A":u={r1:l.r1,r2:l.r2,a:l.angle,l:l.largeArcFlag,s:l.sweepFlag}}u.type=l.pathSegTypeAsLetter,u.x=l.x,u.y=l.y,t.push(u)}return t},bbox:function(){return this._cachedBBox?this._cachedBBox:(SVG.parser.path.setAttribute("d",this.toString()),SVG.parser.path.getBBox())}}),SVG.extend(SVG.PointArray,SVG.PathArray,{cache:function(){return this._cachedBBox=this.uncache().bbox(),this},uncache:function(){return delete this._cachedBBox,this}}),SVG.Number=function(t){switch(this.value=0,this.unit="",typeof t){case"number":this.value=isNaN(t)?0:isFinite(t)?t:0>t?-3.4e38:3.4e38;break;case"string":var e=t.match(SVG.regex.unit);e&&(this.value=parseFloat(e[1]),"%"==e[2]&&(this.value/=100),this.unit=e[2]);break;default:t instanceof SVG.Number&&(this.value=t.value,this.unit=t.unit)}},SVG.extend(SVG.Number,{toString:function(){return("%"==this.unit?~~(1e8*this.value)/1e6:this.value)+this.unit},valueOf:function(){return this.value},to:function(t){return"string"==typeof t&&(this.unit=t),this},plus:function(t){return this.value=this+new SVG.Number(t),this},minus:function(t){return this.plus(-new SVG.Number(t))},times:function(t){return this.value=this*new SVG.Number(t),this},divide:function(t){return this.value=this/new SVG.Number(t),this}}),SVG.ViewBox=function(t){var e,i,n,r,s=1,h=1,o=t.bbox(),a=(t.attr("viewBox")||"").match(/-?[\d\.]+/g);for(n=new SVG.Number(t.width()),r=new SVG.Number(t.height());"%"==n.unit;)s*=n.value,n=new SVG.Number(t instanceof SVG.Doc?t.parent.offsetWidth:t.width());for(;"%"==r.unit;)h*=r.value,r=new SVG.Number(t instanceof SVG.Doc?t.parent.offsetHeight:t.height());this.x=o.x,this.y=o.y,this.width=n*s,this.height=r*h,this.zoom=1,a&&(e=parseFloat(a[0]),i=parseFloat(a[1]),n=parseFloat(a[2]),r=parseFloat(a[3]),this.zoom=this.width/this.height>n/r?this.height/r:this.width/n,this.x=e,this.y=i,this.width=n,this.height=r)},SVG.extend(SVG.ViewBox,{toString:function(){return this.x+" "+this.y+" "+this.width+" "+this.height}}),SVG.BBox=function(t){var e;if(this.x=0,this.y=0,this.width=0,this.height=0,t){try{e=t.node.getBBox()}catch(i){e={x:t.node.clientLeft,y:t.node.clientTop,width:t.node.clientWidth,height:t.node.clientHeight}}this.x=e.x+t.trans.x,this.y=e.y+t.trans.y,this.width=e.width*t.trans.scaleX,this.height=e.height*t.trans.scaleY}this.cx=this.x+this.width/2,this.cy=this.y+this.height/2},SVG.extend(SVG.BBox,{merge:function(t){var e=new SVG.BBox;return e.x=Math.min(this.x,t.x),e.y=Math.min(this.y,t.y),e.width=Math.max(this.x+this.width,t.x+t.width)-e.x,e.height=Math.max(this.y+this.height,t.y+t.height)-e.y,e.cx=e.x+e.width/2,e.cy=e.y+e.height/2,e}}),SVG.RBox=function(t){var e,i,n={};if(this.x=0,this.y=0,this.width=0,this.height=0,t){for(e=t.doc().parent,i=t.doc().viewbox().zoom,n=t.node.getBoundingClientRect(),this.x=n.left,this.y=n.top,this.x-=e.offsetLeft,this.y-=e.offsetTop;e=e.offsetParent;)this.x-=e.offsetLeft,this.y-=e.offsetTop;for(e=t;e=e.parent;)"svg"==e.type&&e.viewbox&&(i*=e.viewbox().zoom,this.x-=e.x()||0,this.y-=e.y()||0)}this.x/=i,this.y/=i,this.width=n.width/=i,this.height=n.height/=i,this.cx=this.x+this.width/2,this.cy=this.y+this.height/2},SVG.extend(SVG.RBox,{merge:function(t){var e=new SVG.RBox;return e.x=Math.min(this.x,t.x),e.y=Math.min(this.y,t.y),e.width=Math.max(this.x+this.width,t.x+t.width)-e.x,e.height=Math.max(this.y+this.height,t.y+t.height)-e.y,e.cx=e.x+e.width/2,e.cy=e.y+e.height/2,e}}),SVG.Element=function(t){this._stroke=SVG.defaults.attrs.stroke,this.styles={},this.trans=SVG.defaults.trans(),(this.node=t)&&(this.type=t.nodeName,this.node.instance=this)},SVG.extend(SVG.Element,{x:function(t){return t&&(t=new SVG.Number(t),t.value/=this.trans.scaleX),this.attr("x",t)},y:function(t){return t&&(t=new SVG.Number(t),t.value/=this.trans.scaleY),this.attr("y",t)},cx:function(t){return null==t?this.bbox().cx:this.x(t-this.bbox().width/2)},cy:function(t){return null==t?this.bbox().cy:this.y(t-this.bbox().height/2)},move:function(t,e){return this.x(t).y(e)},center:function(t,e){return this.cx(t).cy(e)},width:function(t){return this.attr("width",t)},height:function(t){return this.attr("height",t)},size:function(t,e){var i=this._proportionalSize(t,e);return this.attr({width:new SVG.Number(i.width),height:new SVG.Number(i.height)})},clone:function(){var t,e,i=this.type;return t="rect"==i||"ellipse"==i?this.parent[i](0,0):"line"==i?this.parent[i](0,0,0,0):"image"==i?this.parent[i](this.src):"text"==i?this.parent[i](this.content):"path"==i?this.parent[i](this.attr("d")):"polyline"==i||"polygon"==i?this.parent[i](this.attr("points")):"g"==i?this.parent.group():this.parent[i](),e=this.attr(),delete e.id,t.attr(e),t.trans=this.trans,t.transform({})},remove:function(){return this.parent&&this.parent.removeElement(this),this},replace:function(t){return this.after(t).remove(),t},addTo:function(t){return t.put(this)},putIn:function(t){return t.add(this)},doc:function(t){return this._parent(t||SVG.Doc)},attr:function(t,e,i){if(null==t){for(t={},e=this.node.attributes,i=e.length-1;i>=0;i--)t[e[i].nodeName]=SVG.regex.test(e[i].nodeValue,"isNumber")?parseFloat(e[i].nodeValue):e[i].nodeValue;return t}if("object"==typeof t)for(e in t)this.attr(e,t[e]);else if(null===e)this.node.removeAttribute(t);else{if(null==e)return this._isStyle(t)?"text"==t?this.content:"leading"==t&&this.leading?this.leading():this.style(t):(e=this.node.getAttribute(t),null==e?SVG.defaults.attrs[t]:SVG.regex.test(e,"isNumber")?parseFloat(e):e);if("style"==t)return this.style(e);if("x"==t&&Array.isArray(this.lines))for(i=this.lines.length-1;i>=0;i--)this.lines[i].attr(t,e);"stroke-width"==t?this.attr("stroke",parseFloat(e)>0?this._stroke:null):"stroke"==t&&(this._stroke=e),SVG.Color.test(e)||SVG.Color.isRgb(e)?e=new SVG.Color(e):"number"==typeof e?e=new SVG.Number(e):Array.isArray(e)&&(e=new SVG.Array(e)),null!=i?this.node.setAttributeNS(i,t,e.toString()):this.node.setAttribute(t,e.toString()),this._isStyle(t)&&("text"==t?this.text(e):"leading"==t&&this.leading?this.leading(e):this.style(t,e),this.rebuild&&this.rebuild(t,e))}return this},transform:function(t,e){if(0==arguments.length)return this.trans;if("string"==typeof t){if(2>arguments.length)return this.trans[t];var i={};return i[t]=e,this.transform(i)}var i=[];t=this._parseMatrix(t);for(e in t)null!=t[e]&&(this.trans[e]=t[e]);return this.trans.matrix=this.trans.a+" "+this.trans.b+" "+this.trans.c+" "+this.trans.d+" "+this.trans.e+" "+this.trans.f,t=this.trans,t.matrix!=SVG.defaults.matrix&&i.push("matrix("+t.matrix+")"),0!=t.rotation&&i.push("rotate("+t.rotation+" "+(null==t.cx?this.bbox().cx:t.cx)+" "+(null==t.cy?this.bbox().cy:t.cy)+")"),(1!=t.scaleX||1!=t.scaleY)&&i.push("scale("+t.scaleX+" "+t.scaleY+")"),0!=t.skewX&&i.push("skewX("+t.skewX+")"),0!=t.skewY&&i.push("skewY("+t.skewY+")"),(0!=t.x||0!=t.y)&&i.push("translate("+new SVG.Number(t.x/t.scaleX)+" "+new SVG.Number(t.y/t.scaleY)+")"),0==i.length?this.node.removeAttribute("transform"):this.node.setAttribute("transform",i.join(" ")),this},style:function(t,e){if(0==arguments.length)return this.attr("style")||"";if(2>arguments.length)if("object"==typeof t)for(e in t)this.style(e,t[e]);else{if(!SVG.regex.isCss.test(t))return this.styles[t];t=t.split(";");for(var i=0;t.length>i;i++)e=t[i].split(":"),2==e.length&&this.style(e[0].replace(/\s+/g,""),e[1].replace(/^\s+/,"").replace(/\s+$/,""))}else null===e||SVG.regex.test(e,"isBlank")?delete this.styles[t]:this.styles[t]=e;t="";for(e in this.styles)t+=e+":"+this.styles[e]+";";return""==t?this.node.removeAttribute("style"):this.node.setAttribute("style",t),this},bbox:function(){return new SVG.BBox(this)},rbox:function(){return new SVG.RBox(this)},inside:function(t,e){var i=this.bbox();return t>i.x&&e>i.y&&i.x+i.width>t&&i.y+i.height>e},show:function(){return this.style("display","")},hide:function(){return this.style("display","none")},visible:function(){return"none"!=this.style("display")},toString:function(){return this.attr("id")},_parent:function(t){for(var e=this;null!=e&&!(e instanceof t);)e=e.parent;return e},_isStyle:function(t){return"string"==typeof t?SVG.regex.test(t,"isStyle"):!1},_parseMatrix:function(t){if(t.matrix){var e=t.matrix.replace(/\s/g,"").split(",");6==e.length&&(t.a=parseFloat(e[0]),t.b=parseFloat(e[1]),t.c=parseFloat(e[2]),t.d=parseFloat(e[3]),t.e=parseFloat(e[4]),t.f=parseFloat(e[5]))}return t},_proportionalSize:function(t,e){if(null==t||null==e){var i=this.bbox();null==e?e=i.height/i.width*t:null==t&&(t=i.width/i.height*e)}return{width:t,height:e}}}),SVG.Parent=function(t){this.constructor.call(this,t)},SVG.Parent.prototype=new SVG.Element,SVG.extend(SVG.Parent,{children:function(){return this._children||(this._children=[])},add:function(t,e){if(!this.has(t)){if(e=null==e?this.children().length:e,t.parent){var i=t.parent.children().indexOf(t);t.parent.children().splice(i,1)}this.children().splice(e,0,t),this.node.insertBefore(t.node,this.node.childNodes[e]||null),t.parent=this}return this._defs&&(this.node.removeChild(this._defs.node),this.node.appendChild(this._defs.node)),this},put:function(t,e){return this.add(t,e),t},has:function(t){return this.children().indexOf(t)>=0},get:function(t){return this.children()[t]},first:function(){return this.children()[0]},last:function(){return this.children()[this.children().length-1]},each:function(t,e){var i,n,r=this.children();for(i=0,n=r.length;n>i;i++)r[i]instanceof SVG.Element&&t.apply(r[i],[i,r]),e&&r[i]instanceof SVG.Container&&r[i].each(t,e);return this},removeElement:function(t){var e=this.children().indexOf(t);return this.children().splice(e,1),this.node.removeChild(t.node),t.parent=null,this},clear:function(){for(var t=this.children().length-1;t>=0;t--)this.removeElement(this.children()[t]);return this._defs&&this._defs.clear(),this},defs:function(){return this.doc().defs()}}),SVG.Container=function(t){this.constructor.call(this,t)},SVG.Container.prototype=new SVG.Parent,SVG.extend(SVG.Container,{viewbox:function(t){return 0==arguments.length?new SVG.ViewBox(this):(t=1==arguments.length?[t.x,t.y,t.width,t.height]:[].slice.call(arguments),this.attr("viewBox",t))}}),SVG.FX=function(t){this.target=t},SVG.extend(SVG.FX,{animate:function(t,e,i){var n,r,s,h,o=this.target,a=this;return"object"==typeof t&&(i=t.delay,e=t.ease,t=t.duration),t=null==t?1e3:t,e=e||"<>",a.to=function(t){var i;if(t=0>t?0:t>1?1:t,null==n){n=[];for(h in a.attrs)n.push(h);if(o.morphArray&&n.indexOf("points")>-1){var u,l=new o.morphArray(a._plot||o.array);a._size&&l.size(a._size.width.to,a._size.height.to),u=l.bbox(),a._x?l.move(a._x.to,u.y):a._cx&&l.move(a._cx.to-u.width/2,u.y),u=l.bbox(),a._y?l.move(u.x,a._y.to):a._cy&&l.move(u.x,a._cy.to-u.height/2),delete a._x,delete a._y,delete a._cx,delete a._cy,delete a._size,a._plot=o.array.morph(l)}}if(null==r){r=[];for(h in a.trans)r.push(h)}if(null==s){s=[];for(h in a.styles)s.push(h)}for(t="<>"==e?-Math.cos(t*Math.PI)/2+.5:">"==e?Math.sin(t*Math.PI/2):"<"==e?-Math.cos(t*Math.PI/2)+1:"-"==e?t:"function"==typeof e?e(t):t,a._plot?o.plot(a._plot.at(t)):(o.array&&o.array.cache(),a._x?o.x(a._at(a._x,t)):a._cx&&o.cx(a._at(a._cx,t)),a._y?o.y(a._at(a._y,t)):a._cy&&o.cy(a._at(a._cy,t)),a._size&&o.size(a._at(a._size.width,t),a._at(a._size.height,t)),o.array&&o.array.uncache()),a._viewbox&&o.viewbox(a._at(a._viewbox.x,t),a._at(a._viewbox.y,t),a._at(a._viewbox.width,t),a._at(a._viewbox.height,t)),i=n.length-1;i>=0;i--)o.attr(n[i],a._at(a.attrs[n[i]],t));for(i=r.length-1;i>=0;i--)o.transform(r[i],a._at(a.trans[r[i]],t));for(i=s.length-1;i>=0;i--)o.style(s[i],a._at(a.styles[s[i]],t));a._during&&a._during.call(o,t,function(e,i){return a._at({from:e,to:i},t)})},"number"==typeof t&&(this.timeout=setTimeout(function(){var n=(new Date).getTime();a.situation={interval:1e3/60,start:n,play:!0,finish:n+t,duration:t},a.render=function(){if(a.situation.play===!0){var n=(new Date).getTime(),r=n>a.situation.finish?1:(n-a.situation.start)/t;a.to(r),n>a.situation.finish?(a._plot&&o.plot(new SVG.PointArray(a._plot.destination).settle()),a._loop===!0||"number"==typeof a._loop&&a._loop>1?("number"==typeof a._loop&&--a._loop,a.animate(t,e,i)):a._after?a._after.apply(o,[a]):a.stop()):requestAnimFrame(a.render)}else requestAnimFrame(a.render)},a.render()},i||0)),this},bbox:function(){return this.target.bbox()},attr:function(t,e){if("object"==typeof t)for(var i in t)this.attr(i,t[i]);else this.attrs[t]={from:this.target.attr(t),to:e};return this},transform:function(t,e){if(1==arguments.length){t=this.target._parseMatrix(t),delete t.matrix;for(e in t)this.trans[e]={from:this.target.trans[e],to:t[e]}}else{var i={};i[t]=e,this.transform(i)}return this},style:function(t,e){if("object"==typeof t)for(var i in t)this.style(i,t[i]);else this.styles[t]={from:this.target.style(t),to:e};return this},x:function(t){return this._x={from:this.target.x(),to:t},this},y:function(t){return this._y={from:this.target.y(),to:t},this},cx:function(t){return this._cx={from:this.target.cx(),to:t},this},cy:function(t){return this._cy={from:this.target.cy(),to:t},this},move:function(t,e){return this.x(t).y(e)},center:function(t,e){return this.cx(t).cy(e)},size:function(t,e){if(this.target instanceof SVG.Text)this.attr("font-size",t);else{var i=this.target.bbox();this._size={width:{from:i.width,to:t},height:{from:i.height,to:e}}}return this},plot:function(t){return this._plot=t,this},viewbox:function(t,e,i,n){if(this.target instanceof SVG.Container){var r=this.target.viewbox();this._viewbox={x:{from:r.x,to:t},y:{from:r.y,to:e},width:{from:r.width,to:i},height:{from:r.height,to:n}}}return this},update:function(t){return this.target instanceof SVG.Stop&&(null!=t.opacity&&this.attr("stop-opacity",t.opacity),null!=t.color&&this.attr("stop-color",t.color),null!=t.offset&&this.attr("offset",new SVG.Number(t.offset))),this},during:function(t){return this._during=t,this},after:function(t){return this._after=t,this},loop:function(t){return 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this.transform({rotation:t||0,cx:e,cy:i})},skew:function(t,e){return this.transform({skewX:t||0,skewY:e||0})},scale:function(t,e){return this.transform({scaleX:t,scaleY:null==e?t:e})},translate:function(t,e){return this.transform({x:t,y:e})},matrix:function(t){return this.transform({matrix:t})},opacity:function(t){return this.attr("opacity",t)}}),SVG.extend(SVG.Rect,SVG.Ellipse,{radius:function(t,e){return this.attr({rx:t,ry:e||t})}}),SVG.Text&&SVG.extend(SVG.Text,SVG.FX,{font:function(e){for(var i in e)"anchor"==i?this.attr("text-anchor",e[i]):t.indexOf(i)>-1?this.attr("font-"+i,e[i]):this.attr(i,e[i]);return this}}),SVG.Set=function(){this.clear()},SVG.SetFX=function(t){this.set=t},SVG.extend(SVG.Set,{add:function(){var t,e,i=[].slice.call(arguments);for(t=0,e=i.length;e>t;t++)this.members.push(i[t]);return this},remove:function(t){var e=this.members.indexOf(t);return e>-1&&this.members.splice(e,1),this},each:function(t){for(var e=0,i=this.members.length;i>e;e++)t.apply(this.members[e],[e,this.members]);return this},clear:function(){return this.members=[],this},has:function(t){return this.members.indexOf(t)>=0},get:function(t){return this.members[t]},valueOf:function(){return this.members},bbox:function(){var t=new SVG.BBox;if(0==this.members.length)return t;var e=this.members[0].rbox();return t.x=e.x,t.y=e.y,t.width=e.width,t.height=e.height,this.each(function(){t=t.merge(this.rbox())}),t}}),SVG.Set.inherit=function(){var t,e=[];for(var t in SVG.Shape.prototype)"function"==typeof SVG.Shape.prototype[t]&&"function"!=typeof SVG.Set.prototype[t]&&e.push(t);e.forEach(function(t){SVG.Set.prototype[t]=function(){for(var e=0,i=this.members.length;i>e;e++)this.members[e]&&"function"==typeof this.members[e][t]&&this.members[e][t].apply(this.members[e],arguments);return"animate"==t?this.fx||(this.fx=new SVG.SetFX(this)):this}}),e=[];for(var t in SVG.FX.prototype)"function"==typeof SVG.FX.prototype[t]&&"function"!=typeof SVG.SetFX.prototype[t]&&e.push(t);e.forEach(function(t){SVG.SetFX.prototype[t]=function(){for(var e=0,i=this.set.members.length;i>e;e++)this.set.members[e].fx[t].apply(this.set.members[e].fx,arguments);return this}})},SVG.extend(SVG.Container,{set:function(){return new SVG.Set}}),SVG.extend(SVG.Element,{data:function(t,e,i){if("object"==typeof t)for(e in t)this.data(e,t[e]);else if(2>arguments.length)try{return JSON.parse(this.attr("data-"+t))}catch(n){return this.attr("data-"+t)}else this.attr("data-"+t,null===e?null:i===!0||"string"==typeof e||"number"==typeof e?e:JSON.stringify(e));return this}}),SVG.extend(SVG.Element,{remember:function(t,e){if("object"==typeof arguments[0])for(var e in t)this.remember(e,t[e]);else{if(1==arguments.length)return this.memory()[t];this.memory()[t]=e}return this},forget:function(){if(0==arguments.length)this._memory={};else for(var t=arguments.length-1;t>=0;t--)delete this.memory()[arguments[t]];return this},memory:function(){return this._memory||(this._memory={})}}),"function"==typeof define&&define.amd?define(function(){return SVG}):"undefined"!=typeof exports&&(exports.SVG=SVG)}).call(this);
\ No newline at end of file
diff --git a/spec/index.html b/spec/index.html
index f7e01ec..a702289 100644
--- a/spec/index.html
+++ b/spec/index.html
@@ -11,8 +11,8 @@
     #drawing {
       width: 500px;
       height: 500px;
-      position: absolute;
-      z-index: -10;
+      position: fixed;
+      z-index: -1;
     }
   </style>
 
diff --git a/spec/spec/element.js b/spec/spec/element.js
index 22b09bf..67d12f0 100644
--- a/spec/spec/element.js
+++ b/spec/spec/element.js
@@ -314,6 +314,39 @@ describe('Element', function() {
       expect(element).toBe(circle)
     })
   })
+
+  describe('relative()', function() {
+    var rect
+
+    beforeEach(function() {
+      rect = draw.rect(100,100).move(50,60)
+    })
+
+    afterEach(function() {
+      draw.clear()
+    })
+    
+    describe('x()', function() {
+      it('moves the x positon of the element', function() {
+        rect.relative().x(100)
+        expect(rect.node.getAttribute('x')).toBe('150')
+      })
+    })
+    describe('y()', function() {
+      it('moves the y positon of the element', function() {
+        rect.relative().x(120)
+        expect(rect.node.getAttribute('x')).toBe('170')
+      })
+    })
+    describe('move()', function() {
+      it('moves the x and y positon of the element', function() {
+        rect.relative().move(80, 25)
+        expect(rect.node.getAttribute('x')).toBe('130')
+        expect(rect.node.getAttribute('y')).toBe('85')
+      })
+    })
+    
+  })
   
 })
 
diff --git a/spec/spec/set.js b/spec/spec/set.js
index 2a149df..b6199d7 100644
--- a/spec/spec/set.js
+++ b/spec/spec/set.js
@@ -2,8 +2,9 @@ describe('Set', function() {
   var set, e1, e2, e3, e4, e5
 
   beforeEach(function() {
+    draw.attr('viewBox', null)
     set = draw.set()
-    e1  = draw.rect(100,100).attr('id', 'e1')
+    e1  = draw.rect(100,100).attr('id', 'e1').move(200,250)
     e2  = draw.ellipse(100,100).attr('id', 'e2')
     e3  = draw.line(0,0,100,100).attr('id', 'e3')
     e4  = draw.circle(50).attr('id', 'e4')
@@ -94,6 +95,32 @@ describe('Set', function() {
     })
   })
 
+  describe('bbox()', function() {
+    it('returns the bounding box of all elements', function() {
+      set.add(e1).add(e2).add(e3).add(e4).add(e5)
+
+      var box = set.bbox()
+
+      expect(box.x).toBe(0)
+      expect(box.y).toBe(0)
+      expect(box.width).toBe(300)
+      expect(box.height).toBe(350)
+    })
+    it('returns an instance of SVG.BBox', function() {
+      set.add(e1).add(e2).add(e3).add(e4).add(e5)
+
+      expect(set.bbox() instanceof SVG.BBox).toBe(true)
+    })
+    it('returns an empty bounding box wiht no members', function() {
+      var box = set.bbox()
+
+      expect(box.x).toBe(0)
+      expect(box.y).toBe(0)
+      expect(box.width).toBe(0)
+      expect(box.height).toBe(0)
+    })
+  })
+
   describe('method alias', function() {
 
     describe('attr()', function() {
diff --git a/src/relative.js b/src/relative.js
new file mode 100644
index 0000000..2d02c08
--- /dev/null
+++ b/src/relative.js
@@ -0,0 +1,28 @@
+//
+SVG.extend(SVG.Element, SVG.FX, {
+  // Relative methods
+  relative: function() {
+    var b, e = this
+
+    return {
+      // Move over x axis
+      x: function(x) {
+        b = e.bbox()
+
+        return e.x(b.x + (x || 0))
+      }
+      // Move over y axis
+    , y: function(y) {
+        b = e.bbox()
+
+        return e.y(b.y + (y || 0))
+      }
+      // Move over x and y axes
+    , move: function(x, y) {
+        this.x(x)
+        return this.y(y)
+      }
+    }
+  }
+
+})
\ No newline at end of file
diff --git a/src/set.js b/src/set.js
index 1fba388..3808a91 100755
--- a/src/set.js
+++ b/src/set.js
@@ -56,6 +56,28 @@ SVG.extend(SVG.Set, {
 , valueOf: function() {
     return this.members
   }
+  // Get the bounding box of all members included or empty box if set has no items
+, bbox: function(){
+    var box = new SVG.BBox()
+
+    /* return an empty box of there are no members */
+    if (this.members.length == 0)
+      return box
+
+    /* get the first rbox and update the target bbox */
+    var rbox = this.members[0].rbox()
+    box.x      = rbox.x
+    box.y      = rbox.y
+    box.width  = rbox.width
+    box.height = rbox.height
+
+    this.each(function() {
+      /* user rbox for correct position and visual representation */
+      box = box.merge(this.rbox())
+    })
+
+    return box
+  }
 
 })