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POHow to create a round menu with javascript?
 

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  1. POHow to create a round menu with javascript?
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    <p>1:I want to make a round menu with javascript in which items could response to click and gesturechange events.The effects are: a):If the selected item is not frontest,then it will circle to the frontest position after being clicked; b):If the gesture change is down or right,all the items will circle clockwise by some degrees;otherwise they will circle anti-clockwise by some degrees</p> <p>2:I have got an example,but i did't firgure out how it works.Could you guys give me some advice or make some comments to the code ? The example is below:</p> <pre><code> &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; &lt;head&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt; &lt;style&gt; #show{position:relative;margin:20px auto;width:800px;border:1px solid #999999;} .item{position:absolute;height:40px;width:60px;background:#999999;border:1px solid #eeeeee;cursor:pointer;} &lt;/style&gt; &lt;script&gt; var len; var showerObj; var listObj; var showerWidth=800; var showerHeight=400; var r; var cR=0; var ccR=0; var timer=0; window.onload=function(){ showerObj=document.getElementById("show"); listObj=showerObj.getElementsByTagName("div"); len=listObj.length; r=Math.PI/180*360/len; for(var i=0;i&lt;len;i++){ var item=listObj[i]; item.style.top=showerHeight/2+Math.sin(r*i)*showerWidth/2-20+"px"; item.style.left=showerWidth/2+Math.cos(r*i)*showerWidth/2-30+"px"; item.rotate=(r*i+2*Math.PI)%(2*Math.PI); item.onclick=function(){ cR=Math.PI/2-this.rotate; timer || (timer=setInterval(rotate,10)); } } var rX=showerObj.offsetLeft+showerWidth/2; var ry=showerObj.offsetTop+showerHeight/2; var rotate=function(){ ccR=(ccR+2*Math.PI)%(2*Math.PI); if(cR-ccR&lt;0) cR=cR+2*Math.PI; if(cR-ccR&lt;Math.PI){ ccR=ccR+(cR-ccR)/19; }else{ ccR=ccR-(2*Math.PI+ccR-cR)/19; } if(Math.abs((cR+2*Math.PI)%(2*Math.PI)-(ccR+2*Math.PI)%(2*Math.PI))&lt;Math.PI/720){ ccR=cR; clearInterval(timer); timer=0; } for(var i=0;i&lt;len;i++){ var item=listObj[i]; var w,h; var sinR=Math.sin(r*i+ccR); var cosR=Math.cos(r*i+ccR); w=60+0.6*60*sinR; h=(40+0.6*40*sinR); item.style.cssText +=";width:"+w+"px;height:"+h+"px;top:"+parseInt(showerHeight/2+sinR*showerWidth/2/3-w/2)+"px;left:"+parseInt(showerWidth/2+cosR*showerWidth/2-h/2)+"px;z-index:"+parseInt(showerHeight/2+sinR*showerWidth/2/3-w/2)+";"; } } document.getElementById("l").onclick=function(){ cR=(cR+r+2*Math.PI)%(2*Math.PI); timer || (timer=setInterval(rotate,10)); } document.getElementById("r").onclick=function(){ cR=(cR-r+2*Math.PI)%(2*Math.PI); timer || (timer=setInterval(rotate,10)); } rotate(); } &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;input id="l" type="button" value="left" &gt; &lt;input id="r" type="button" value="right" &gt; &lt;div id="show"&gt; &lt;div class="item"&gt;1&lt;/div&gt; &lt;div class="item"&gt;2&lt;/div&gt; &lt;div class="item"&gt;3&lt;/div&gt; &lt;div class="item"&gt;4&lt;/div&gt; &lt;div class="item"&gt;5&lt;/div&gt; &lt;div class="item"&gt;6&lt;/div&gt; &lt;div class="item"&gt;7&lt;/div&gt; &lt;div class="item"&gt;8&lt;/div&gt; &lt;div class="item"&gt;9&lt;/div&gt; &lt;div class="item"&gt;0&lt;/div&gt; &lt;div class="item"&gt;a&lt;/div&gt; &lt;div class="item"&gt;b&lt;/div&gt; &lt;div class="item"&gt;1&lt;/div&gt; &lt;div class="item"&gt;2&lt;/div&gt; &lt;div class="item"&gt;3&lt;/div&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>JSFiddle <a href="http://jsfiddle.net/vCpHz/" rel="nofollow">here</a></p>
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    1. PTQuestion
    1. USStefano Sanfilippo
    1. USgabriel aflext
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    1. COActually,i want to do this for Android and IOS devices
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      1. POHow to create a round menu with javascript?
      1. USgabriel aflext
    2. COCan anybody help me to make it display like a circle and will keep the style no matter how you stretch the browser?
      singulars
      1. POHow to create a round menu with javascript?
      1. USgabriel aflext
 

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