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clock.js Example File
script/context2d/scripts/clock.js

 function init(){
   clock();
   setInterval('clock()',1000);
 }
 function clock(){
   var now = new Date();
   var ctx = document.getElementById('tutorial').getContext('2d');
   ctx.save();
   ctx.clearRect(0,0,150,150);
   ctx.translate(75,75);
   ctx.scale(0.4,0.4);
   ctx.rotate(-Math.PI/2);
   ctx.strokeStyle = "black";
   ctx.fillStyle = "white";
   ctx.lineWidth = 8;
   ctx.lineCap = "round";

   // Hour marks
   ctx.save();
   ctx.beginPath();
   for (i=0;i<12;i++){
     ctx.rotate(Math.PI/6);
     ctx.moveTo(100,0);
     ctx.lineTo(120,0);
   }
   ctx.stroke();
   ctx.restore();

   // Minute marks
   ctx.save();
   ctx.lineWidth = 5;
   ctx.beginPath();
   for (i=0;i<60;i++){
     if (i%5!=0) {
       ctx.moveTo(117,0);
       ctx.lineTo(120,0);
     }
     ctx.rotate(Math.PI/30);
   }
   ctx.stroke();
   ctx.restore();

   var sec = now.getSeconds();
   var min = now.getMinutes();
   var hr  = now.getHours();
   hr = hr>=12 ? hr-12 : hr;

   ctx.fillStyle = "black";

   // write Hours
   ctx.save();
   ctx.rotate( hr*(Math.PI/6) + (Math.PI/360)*min + (Math.PI/21600)*sec )
   ctx.lineWidth = 14;
   ctx.beginPath();
   ctx.moveTo(-20,0);
   ctx.lineTo(80,0);
   ctx.stroke();
   ctx.restore();

   // write Minutes
   ctx.save();
   ctx.rotate( (Math.PI/30)*min + (Math.PI/1800)*sec )
   ctx.lineWidth = 10;
   ctx.beginPath();
   ctx.moveTo(-28,0);
   ctx.lineTo(112,0);
   ctx.stroke();
   ctx.restore();

   // Write seconds
   ctx.save();
   ctx.rotate(sec * Math.PI/30);
   ctx.strokeStyle = "#D40000";
   ctx.fillStyle = "#D40000";
   ctx.lineWidth = 6;
   ctx.beginPath();
   ctx.moveTo(-30,0);
   ctx.lineTo(83,0);
   ctx.stroke();
   ctx.beginPath();
   ctx.arc(0,0,10,0,Math.PI*2,true);
   ctx.fill();
   ctx.beginPath();
   ctx.arc(95,0,10,0,Math.PI*2,true);
   ctx.stroke();
   ctx.fillStyle = "#555";
   ctx.arc(0,0,3,0,Math.PI*2,true);
   ctx.fill();
   ctx.restore();

   ctx.beginPath();
   ctx.lineWidth = 14;
   ctx.strokeStyle = '#325FA2';
   ctx.arc(0,0,142,0,Math.PI*2,true);
   ctx.stroke();

   ctx.restore();
 }
 init();


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Qt 4.6.3