From: wout <wout@impinc.co.uk>
Date: Thu, 27 Dec 2012 18:08:25 +0000 (+0100)
Subject: Bug fix in bbox()
X-Git-Tag: 0.2~58
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=92628abe74749f8106ec271368c87df6b6f3c134;p=svg.js.git

Bug fix in bbox()
---

diff --git a/dist/svg.js b/dist/svg.js
index 749a9b8..f3e20ff 100644
--- a/dist/svg.js
+++ b/dist/svg.js
@@ -1,4 +1,4 @@
-/* svg.js v0.1-30-g9501ce9 - svg container element group arrange defs clip gradient doc shape rect circle ellipse path image text sugar - svgjs.com/license */
+/* svg.js v0.1-32-g76af311 - svg container element group arrange defs clip gradient doc shape rect circle ellipse path image text sugar - svgjs.com/license */
 (function() {
 
   this.SVG = {
@@ -173,6 +173,13 @@
       return this.attr({ width: w, height: h });
     },
     
+    // position element by its center
+    center: function(x, y) {
+      var b = this.bbox();
+      
+      return this.move(x - b.width / 2, y - b.height / 2);
+    },
+    
     // remove element
     remove: function() {
       return this.parent != null ? this.parent.remove(this) : void 0;
@@ -275,10 +282,10 @@
       return {
         // include translations on x an y
         x:      b.x + this.trans.x,
-        y:      b.x + this.trans.y,
+        y:      b.y + this.trans.y,
         // add the center
         cx:     b.x + this.trans.x + b.width / 2,
-        cy:     b.x + this.trans.y + b.height / 2,
+        cy:     b.y + this.trans.y + b.height / 2,
         // plain width and height
         width:  b.width,
         height: b.height
diff --git a/dist/svg.min.js b/dist/svg.min.js
index 169f1b7..c87c53c 100644
--- a/dist/svg.min.js
+++ b/dist/svg.min.js
@@ -1,2 +1,2 @@
-/* svg.js v0.1-30-g9501ce9 - svg container element group arrange defs clip gradient doc shape rect circle ellipse path image text sugar - svgjs.com/license */
-function svg(e){return new SVG.Doc(e)}(function(){function n(){this.constructor.call(this,SVG.create("tspan"))}this.SVG={ns:"http://www.w3.org/2000/svg",xlink:"http://www.w3.org/1999/xlink",create:function(e){return document.createElementNS(this.ns,e)},extend:function(e,t){for(var n in t)e.prototype[n]=t[n]}},SVG.Container={add:function(e,t){return this.has(e)||(t=t==null?this.children().length:t,this.children().splice(t,0,e),this.node.insertBefore(e.node,this.node.childNodes[t]||null),e.parent=this),this},has:function(e){return this.children().indexOf(e)>=0},children:function(){return this._children||(this._children=[])},remove:function(e){return this.removeAt(this.children().indexOf(e))},removeAt:function(e){if(0<=e&&e<this.children().length){var t=this.children()[e];this.children().splice(e,1),this.node.removeChild(t.node),t.parent=null}return this},defs:function(){return this._defs==null&&(this._defs=new SVG.Defs,this.add(this._defs,0)),this._defs},level:function(){var e=this.defs();return this.remove(e).add(e,0),this},group:function(){var e=new SVG.G;return this.add(e),e},rect:function(e,t){var n=(new SVG.Rect).size(e,t);return this.add(n),n},circle:function(e){var t=(new SVG.Circle).size(e);return this.add(t),t},ellipse:function(e,t){var n=(new SVG.Ellipse).size(e,t);return this.add(n),n},path:function(e){var t=(new SVG.Path).plot(e);return this.add(t),t},image:function(e){var t=(new SVG.Image).load(e);return this.add(t),t},text:function(e){var t=(new SVG.Text).text(e);return this.add(t),t},gradient:function(e,t){return this.defs().gradient(e,t)},stage:function(){var e,t=this;return e=function(){document.readyState==="complete"?(t.attr("style","position:absolute;left:0;top:0;"),setTimeout(function(){t.attr("style","position:relative;")},5)):setTimeout(e,10)},e(),this}},SVG.Element=function(t){this.node=t,this.attrs={},this.trans={x:0,y:0,scaleX:1,scaleY:1,rotation:0,skewX:0,skewY:0},this._s="size family weight stretch variant style".split(" ")},SVG.extend(SVG.Element,{move:function(e,t){return this.attr({x:e,y:t})},size:function(e,t){return this.attr({width:e,height:t})},remove:function(){return this.parent!=null?this.parent.remove(this):void 0},parentDoc:function(){return this._parent(SVG.Doc)},attr:function(e,t,n){if(arguments.length<2){if(typeof e!="object")return this._isStyle(e)?e=="text"?this.content:e=="leading"?this[e]:this.style[e]:this.attrs[e];for(t in e)this.attr(t,e[t])}else{this.attrs[e]=t;if(e=="x"&&this._isText())for(var r=this.lines.length-1;r>=0;r--)this.lines[r].attr(e,t);else n!=null?this.node.setAttributeNS(n,e,t):this.node.setAttribute(e,t);this._isStyle(e)&&(e=="text"?this.text(t):e=="leading"?this[e]=t:this.style[e]=t,this.text(this.content))}return this},transform:function(e){if(typeof e=="string")return this.trans[e];var t,n=[],r=this.bbox(),i=this.attr("transform")||"",s=i.match(/[a-z]+\([^\)]+\)/g)||[];for(t in e)e[t]!=null&&(this.trans[t]=e[t]);return e=this.trans,e.rotation!=0&&n.push("rotate("+e.rotation+","+(e.cx!=null?e.cx:r.cx)+","+(e.cy!=null?e.cy:r.cy)+")"),e.scaleX!=1&&e.scaleY!=1&&n.push("scale("+e.sx+","+e.sy+")"),e.skewX!=0&&n.push("skewX("+x.skewX+")"),e.skewY!=0&&n.push("skewY("+x.skewY+")"),e.x!=0&&e.y!=0&&n.push("translate("+e.x+","+e.y+")"),this.attr("transform",n.join(" "))},bbox:function(){var e=this.node.getBBox();return{x:e.x+this.trans.x,y:e.x+this.trans.y,cx:e.x+this.trans.x+e.width/2,cy:e.x+this.trans.y+e.height/2,width:e.width,height:e.height}},_parent:function(e){var t=this;while(t!=null&&!(t instanceof e))t=t.parent;return t},_isStyle:function(e){return typeof e=="string"&&this._isText()?/^font|text|leading/.test(e):!1},_isText:function(){return this instanceof SVG.Text}}),SVG.G=function(){this.constructor.call(this,SVG.create("g"))},SVG.G.prototype=new SVG.Element,SVG.extend(SVG.G,SVG.Container),SVG.extend(SVG.Element,{siblings:function(){return this.parent.children()},forward:function(){var e=this.siblings().indexOf(this);return this.parent.remove(this).add(this,e+1),this},backward:function(){var e,t=this.parent.level();return e=this.siblings().indexOf(this),e>1&&t.remove(this).add(this,e-1),this},front:function(){return this.parent.remove(this).add(this),this},back:function(){var e,t=this.parent.level();return e=this.siblings().indexOf(this),e>1&&t.remove(this).add(this,0),this}}),SVG.Defs=function(){this.constructor.call(this,SVG.create("defs"))},SVG.Defs.prototype=new SVG.Element,SVG.extend(SVG.Defs,SVG.Container);var e=0;SVG.Clip=function(){this.constructor.call(this,SVG.create("clipPath")),this.id="svgjs_clip_"+e++,this.attr("id",this.id)},SVG.Clip.prototype=new SVG.Element,SVG.extend(SVG.Clip,SVG.Container),SVG.extend(SVG.Element,{clip:function(e){var t=this.parent.defs().clip();return e(t),this.clipTo(t)},clipTo:function(e){return this.attr("clip-path","url(#"+e.id+")")}}),SVG.extend(SVG.Defs,{clip:function(){var e=new SVG.Clip;return this.add(e),e}});var t=0;SVG.Gradient=function(n){this.constructor.call(this,SVG.create(n+"Gradient")),this.id="svgjs_grad_"+t++,this.type=n,this.attr("id",this.id)},SVG.Gradient.prototype=new SVG.Element,SVG.extend(SVG.Gradient,SVG.Container),SVG.extend(SVG.Gradient,{from:function(e,t){return this.type=="radial"?this.attr({fx:e+"%",fy:t+"%"}):this.attr({x1:e+"%",y1:t+"%"})},to:function(e,t){return this.type=="radial"?this.attr({cx:e+"%",cy:t+"%"}):this.attr({x2:e+"%",y2:t+"%"})},radius:function(e){return this.type=="radial"?this.attr({r:e+"%"}):this},at:function(e){var t=new SVG.Stop(e);return this.add(t),t},update:function(e){while(this.node.hasChildNodes())this.node.removeChild(this.node.lastChild);return e(this),this},fill:function(){return"url(#"+this.id+")"}}),SVG.extend(SVG.Defs,{gradient:function(e,t){var n=new SVG.Gradient(e);return this.add(n),t(n),n}}),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(e){var t="",n=["opacity","color"];for(var r=n.length-1;r>=0;r--)e[n[r]]!=null&&(t+="stop-"+n[r]+":"+e[n[r]]+";");return this.attr({offset:(e.offset!=null?e.offset:this.attr("offset")||0)+"%",style:t})}}),SVG.Doc=function(t){this.constructor.call(this,SVG.create("svg"));var n=document.createElement("div");n.style.cssText="position:relative;width:100%;height:100%;",typeof t=="string"&&(t=document.getElementById(t)),this.attr({xmlns:SVG.ns,version:"1.1",width:"100%",height:"100%"}).attr("xlink",SVG.xlink,SVG.ns).defs(),t.appendChild(n),n.appendChild(this.node),this.stage()},SVG.Doc.prototype=new SVG.Element,SVG.extend(SVG.Doc,SVG.Container),SVG.Shape=function(t){this.constructor.call(this,t)},SVG.Shape.prototype=new SVG.Element,SVG.Rect=function(){this.constructor.call(this,SVG.create("rect"))},SVG.Rect.prototype=new SVG.Shape,SVG.Circle=function(){this.constructor.call(this,SVG.create("circle"))},SVG.Circle.prototype=new SVG.Shape,SVG.extend(SVG.Circle,{move:function(e,t){return this.attrs.x=e,this.attrs.y=t,this.center()},size:function(e){return this.attr("r",e/2).center()},center:function(e,t){var n=this.attrs.r||0;return this.attr({cx:e||(this.attrs.x||0)+n,cy:t||(this.attrs.y||0)+n})}}),SVG.Ellipse=function(){this.constructor.call(this,SVG.create("ellipse"))},SVG.Ellipse.prototype=new SVG.Shape,SVG.extend(SVG.Ellipse,{move:function(e,t){return this.attrs.x=e,this.attrs.y=t,this.center()},size:function(e,t){return this.attr({rx:e/2,ry:t/2}).center()},center:function(e,t){return this.attr({cx:e||(this.attrs.x||0)+(this.attrs.rx||0),cy:t||(this.attrs.y||0)+(this.attrs.ry||0)})}}),SVG.Path=function(){this.constructor.call(this,SVG.create("path"))},SVG.Path.prototype=new SVG.Shape,SVG.extend(SVG.Path,{plot:function(e){return this.attr("d",e||"M0,0L0,0")},move:function(e,t){return this.transform({x:e,y:t})}}),SVG.Image=function(){this.constructor.call(this,SVG.create("image"))},SVG.Image.prototype=new SVG.Shape,SVG.extend(SVG.Image,{load:function(e){return this.attr("xlink:href",e,SVG.xlink)}}),SVG.Text=function(){this.constructor.call(this,SVG.create("text")),this.style={"font-size":16,"font-family":"Helvetica","text-anchor":"start"},this.leading=1.2,this.lines=[]},SVG.Text.prototype=new SVG.Shape,SVG.extend(SVG.Text,{text:function(e){this.content=e=e||"text",this.lines=[];var t,r,i=this._style(),s=this.parentDoc(),o=e.split("\n");while(this.node.hasChildNodes())this.node.removeChild(this.node.lastChild);for(t=0,l=o.length;t<l;t++)r=(new n).text(o[t]).attr({dy:this.style["font-size"]*this.leading,x:this.attr("x")||0,style:i}),this.node.appendChild(r.node),this.lines.push(r);return this.attr("style",i)},_style:function(){var e,t="",n=this._s;for(e=n.length-1;e>=0;e--)this.style["font-"+n[e]]!=null&&(t+="font-"+n[e]+":"+this.style["font-"+n[e]]+";");return t+="text-anchor:"+this.style["text-anchor"]+";",t}}),n.prototype=new SVG.Shape,SVG.extend(n,{text:function(e){return this.node.appendChild(document.createTextNode(e)),this}}),SVG.extend(SVG.Shape,{fill:function(e){return e.color!=null&&this.attr("fill",e.color),e.opacity!=null&&this.attr("fill-opacity",e.opacity),this},stroke:function(e){e.color&&this.attr("stroke",e.color);var t="width opacity linecap linejoin miterlimit dasharray dashoffset".split(" ");for(var n=t.length-1;n>=0;n--)e[t[n]]!=null&&this.attr("stroke-"+t[n],e[t[n]]);return this}}),SVG.extend(SVG.Element,{rotate:function(e,t,n){var r=this.bbox();return this.transform({rotation:e||0,cx:t==null?r.cx:t,cy:n==null?r.cx:n})}}),SVG.extend(SVG.G,{move:function(e,t){return this.transform({x:e,y:t})}}),SVG.extend(SVG.Text,{font:function(e){var t,n={};for(t in e)t=="leading"?n[t]=e[t]:t=="anchor"?n["text-anchor"]=e[t]:this._s.indexOf(t)>-1?n["font-"+t]=e[t]:void 0;return this.attr(n).text(this.content)}})}).call(this);
\ No newline at end of file
+/* svg.js v0.1-32-g76af311 - svg container element group arrange defs clip gradient doc shape rect circle ellipse path image text sugar - svgjs.com/license */
+function svg(e){return new SVG.Doc(e)}(function(){function n(){this.constructor.call(this,SVG.create("tspan"))}this.SVG={ns:"http://www.w3.org/2000/svg",xlink:"http://www.w3.org/1999/xlink",create:function(e){return document.createElementNS(this.ns,e)},extend:function(e,t){for(var n in t)e.prototype[n]=t[n]}},SVG.Container={add:function(e,t){return this.has(e)||(t=t==null?this.children().length:t,this.children().splice(t,0,e),this.node.insertBefore(e.node,this.node.childNodes[t]||null),e.parent=this),this},has:function(e){return this.children().indexOf(e)>=0},children:function(){return this._children||(this._children=[])},remove:function(e){return this.removeAt(this.children().indexOf(e))},removeAt:function(e){if(0<=e&&e<this.children().length){var t=this.children()[e];this.children().splice(e,1),this.node.removeChild(t.node),t.parent=null}return this},defs:function(){return this._defs==null&&(this._defs=new SVG.Defs,this.add(this._defs,0)),this._defs},level:function(){var e=this.defs();return this.remove(e).add(e,0),this},group:function(){var e=new SVG.G;return this.add(e),e},rect:function(e,t){var n=(new SVG.Rect).size(e,t);return this.add(n),n},circle:function(e){var t=(new SVG.Circle).size(e);return this.add(t),t},ellipse:function(e,t){var n=(new SVG.Ellipse).size(e,t);return this.add(n),n},path:function(e){var t=(new SVG.Path).plot(e);return this.add(t),t},image:function(e){var t=(new SVG.Image).load(e);return this.add(t),t},text:function(e){var t=(new SVG.Text).text(e);return this.add(t),t},gradient:function(e,t){return this.defs().gradient(e,t)},stage:function(){var e,t=this;return e=function(){document.readyState==="complete"?(t.attr("style","position:absolute;left:0;top:0;"),setTimeout(function(){t.attr("style","position:relative;")},5)):setTimeout(e,10)},e(),this}},SVG.Element=function(t){this.node=t,this.attrs={},this.trans={x:0,y:0,scaleX:1,scaleY:1,rotation:0,skewX:0,skewY:0},this._s="size family weight stretch variant style".split(" ")},SVG.extend(SVG.Element,{move:function(e,t){return this.attr({x:e,y:t})},size:function(e,t){return this.attr({width:e,height:t})},center:function(e,t){var n=this.bbox();return this.move(e-n.width/2,t-n.height/2)},remove:function(){return this.parent!=null?this.parent.remove(this):void 0},parentDoc:function(){return this._parent(SVG.Doc)},attr:function(e,t,n){if(arguments.length<2){if(typeof e!="object")return this._isStyle(e)?e=="text"?this.content:e=="leading"?this[e]:this.style[e]:this.attrs[e];for(t in e)this.attr(t,e[t])}else{this.attrs[e]=t;if(e=="x"&&this._isText())for(var r=this.lines.length-1;r>=0;r--)this.lines[r].attr(e,t);else n!=null?this.node.setAttributeNS(n,e,t):this.node.setAttribute(e,t);this._isStyle(e)&&(e=="text"?this.text(t):e=="leading"?this[e]=t:this.style[e]=t,this.text(this.content))}return this},transform:function(e){if(typeof e=="string")return this.trans[e];var t,n=[],r=this.bbox(),i=this.attr("transform")||"",s=i.match(/[a-z]+\([^\)]+\)/g)||[];for(t in e)e[t]!=null&&(this.trans[t]=e[t]);return e=this.trans,e.rotation!=0&&n.push("rotate("+e.rotation+","+(e.cx!=null?e.cx:r.cx)+","+(e.cy!=null?e.cy:r.cy)+")"),e.scaleX!=1&&e.scaleY!=1&&n.push("scale("+e.sx+","+e.sy+")"),e.skewX!=0&&n.push("skewX("+x.skewX+")"),e.skewY!=0&&n.push("skewY("+x.skewY+")"),e.x!=0&&e.y!=0&&n.push("translate("+e.x+","+e.y+")"),this.attr("transform",n.join(" "))},bbox:function(){var e=this.node.getBBox();return{x:e.x+this.trans.x,y:e.y+this.trans.y,cx:e.x+this.trans.x+e.width/2,cy:e.y+this.trans.y+e.height/2,width:e.width,height:e.height}},_parent:function(e){var t=this;while(t!=null&&!(t instanceof e))t=t.parent;return t},_isStyle:function(e){return typeof e=="string"&&this._isText()?/^font|text|leading/.test(e):!1},_isText:function(){return this instanceof SVG.Text}}),SVG.G=function(){this.constructor.call(this,SVG.create("g"))},SVG.G.prototype=new SVG.Element,SVG.extend(SVG.G,SVG.Container),SVG.extend(SVG.Element,{siblings:function(){return this.parent.children()},forward:function(){var e=this.siblings().indexOf(this);return this.parent.remove(this).add(this,e+1),this},backward:function(){var e,t=this.parent.level();return e=this.siblings().indexOf(this),e>1&&t.remove(this).add(this,e-1),this},front:function(){return this.parent.remove(this).add(this),this},back:function(){var e,t=this.parent.level();return e=this.siblings().indexOf(this),e>1&&t.remove(this).add(this,0),this}}),SVG.Defs=function(){this.constructor.call(this,SVG.create("defs"))},SVG.Defs.prototype=new SVG.Element,SVG.extend(SVG.Defs,SVG.Container);var e=0;SVG.Clip=function(){this.constructor.call(this,SVG.create("clipPath")),this.id="svgjs_clip_"+e++,this.attr("id",this.id)},SVG.Clip.prototype=new SVG.Element,SVG.extend(SVG.Clip,SVG.Container),SVG.extend(SVG.Element,{clip:function(e){var t=this.parent.defs().clip();return e(t),this.clipTo(t)},clipTo:function(e){return this.attr("clip-path","url(#"+e.id+")")}}),SVG.extend(SVG.Defs,{clip:function(){var e=new SVG.Clip;return this.add(e),e}});var t=0;SVG.Gradient=function(n){this.constructor.call(this,SVG.create(n+"Gradient")),this.id="svgjs_grad_"+t++,this.type=n,this.attr("id",this.id)},SVG.Gradient.prototype=new SVG.Element,SVG.extend(SVG.Gradient,SVG.Container),SVG.extend(SVG.Gradient,{from:function(e,t){return this.type=="radial"?this.attr({fx:e+"%",fy:t+"%"}):this.attr({x1:e+"%",y1:t+"%"})},to:function(e,t){return this.type=="radial"?this.attr({cx:e+"%",cy:t+"%"}):this.attr({x2:e+"%",y2:t+"%"})},radius:function(e){return this.type=="radial"?this.attr({r:e+"%"}):this},at:function(e){var t=new SVG.Stop(e);return this.add(t),t},update:function(e){while(this.node.hasChildNodes())this.node.removeChild(this.node.lastChild);return e(this),this},fill:function(){return"url(#"+this.id+")"}}),SVG.extend(SVG.Defs,{gradient:function(e,t){var n=new SVG.Gradient(e);return this.add(n),t(n),n}}),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(e){var t="",n=["opacity","color"];for(var r=n.length-1;r>=0;r--)e[n[r]]!=null&&(t+="stop-"+n[r]+":"+e[n[r]]+";");return this.attr({offset:(e.offset!=null?e.offset:this.attr("offset")||0)+"%",style:t})}}),SVG.Doc=function(t){this.constructor.call(this,SVG.create("svg"));var n=document.createElement("div");n.style.cssText="position:relative;width:100%;height:100%;",typeof t=="string"&&(t=document.getElementById(t)),this.attr({xmlns:SVG.ns,version:"1.1",width:"100%",height:"100%"}).attr("xlink",SVG.xlink,SVG.ns).defs(),t.appendChild(n),n.appendChild(this.node),this.stage()},SVG.Doc.prototype=new SVG.Element,SVG.extend(SVG.Doc,SVG.Container),SVG.Shape=function(t){this.constructor.call(this,t)},SVG.Shape.prototype=new SVG.Element,SVG.Rect=function(){this.constructor.call(this,SVG.create("rect"))},SVG.Rect.prototype=new SVG.Shape,SVG.Circle=function(){this.constructor.call(this,SVG.create("circle"))},SVG.Circle.prototype=new SVG.Shape,SVG.extend(SVG.Circle,{move:function(e,t){return this.attrs.x=e,this.attrs.y=t,this.center()},size:function(e){return this.attr("r",e/2).center()},center:function(e,t){var n=this.attrs.r||0;return this.attr({cx:e||(this.attrs.x||0)+n,cy:t||(this.attrs.y||0)+n})}}),SVG.Ellipse=function(){this.constructor.call(this,SVG.create("ellipse"))},SVG.Ellipse.prototype=new SVG.Shape,SVG.extend(SVG.Ellipse,{move:function(e,t){return this.attrs.x=e,this.attrs.y=t,this.center()},size:function(e,t){return this.attr({rx:e/2,ry:t/2}).center()},center:function(e,t){return this.attr({cx:e||(this.attrs.x||0)+(this.attrs.rx||0),cy:t||(this.attrs.y||0)+(this.attrs.ry||0)})}}),SVG.Path=function(){this.constructor.call(this,SVG.create("path"))},SVG.Path.prototype=new SVG.Shape,SVG.extend(SVG.Path,{plot:function(e){return this.attr("d",e||"M0,0L0,0")},move:function(e,t){return this.transform({x:e,y:t})}}),SVG.Image=function(){this.constructor.call(this,SVG.create("image"))},SVG.Image.prototype=new SVG.Shape,SVG.extend(SVG.Image,{load:function(e){return this.attr("xlink:href",e,SVG.xlink)}}),SVG.Text=function(){this.constructor.call(this,SVG.create("text")),this.style={"font-size":16,"font-family":"Helvetica","text-anchor":"start"},this.leading=1.2,this.lines=[]},SVG.Text.prototype=new SVG.Shape,SVG.extend(SVG.Text,{text:function(e){this.content=e=e||"text",this.lines=[];var t,r,i=this._style(),s=this.parentDoc(),o=e.split("\n");while(this.node.hasChildNodes())this.node.removeChild(this.node.lastChild);for(t=0,l=o.length;t<l;t++)r=(new n).text(o[t]).attr({dy:this.style["font-size"]*this.leading,x:this.attr("x")||0,style:i}),this.node.appendChild(r.node),this.lines.push(r);return this.attr("style",i)},_style:function(){var e,t="",n=this._s;for(e=n.length-1;e>=0;e--)this.style["font-"+n[e]]!=null&&(t+="font-"+n[e]+":"+this.style["font-"+n[e]]+";");return t+="text-anchor:"+this.style["text-anchor"]+";",t}}),n.prototype=new SVG.Shape,SVG.extend(n,{text:function(e){return this.node.appendChild(document.createTextNode(e)),this}}),SVG.extend(SVG.Shape,{fill:function(e){return e.color!=null&&this.attr("fill",e.color),e.opacity!=null&&this.attr("fill-opacity",e.opacity),this},stroke:function(e){e.color&&this.attr("stroke",e.color);var t="width opacity linecap linejoin miterlimit dasharray dashoffset".split(" ");for(var n=t.length-1;n>=0;n--)e[t[n]]!=null&&this.attr("stroke-"+t[n],e[t[n]]);return this}}),SVG.extend(SVG.Element,{rotate:function(e,t,n){var r=this.bbox();return this.transform({rotation:e||0,cx:t==null?r.cx:t,cy:n==null?r.cx:n})}}),SVG.extend(SVG.G,{move:function(e,t){return this.transform({x:e,y:t})}}),SVG.extend(SVG.Text,{font:function(e){var t,n={};for(t in e)t=="leading"?n[t]=e[t]:t=="anchor"?n["text-anchor"]=e[t]:this._s.indexOf(t)>-1?n["font-"+t]=e[t]:void 0;return this.attr(n).text(this.content)}})}).call(this);
\ No newline at end of file
diff --git a/src/element.js b/src/element.js
index 33813c4..5a4d4ed 100644
--- a/src/element.js
+++ b/src/element.js
@@ -28,6 +28,13 @@ SVG.extend(SVG.Element, {
     return this.attr({ width: w, height: h });
   },
   
+  // position element by its center
+  center: function(x, y) {
+    var b = this.bbox();
+    
+    return this.move(x - b.width / 2, y - b.height / 2);
+  },
+  
   // remove element
   remove: function() {
     return this.parent != null ? this.parent.remove(this) : void 0;
@@ -130,10 +137,10 @@ SVG.extend(SVG.Element, {
     return {
       // include translations on x an y
       x:      b.x + this.trans.x,
-      y:      b.x + this.trans.y,
+      y:      b.y + this.trans.y,
       // add the center
       cx:     b.x + this.trans.x + b.width / 2,
-      cy:     b.x + this.trans.y + b.height / 2,
+      cy:     b.y + this.trans.y + b.height / 2,
       // plain width and height
       width:  b.width,
       height: b.height