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wave/socket1.html 2.78 KB
cf76164e6   Ting Chan   20190709
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  <html>
    <head>
  <script type="application/javascript">
  var host = window.location.hostname;
  document.write('<script src="http://'+host+'/wave/node_modules/socket.io/node_modules/socket.io-client/socket.io.js"\></script\>');
  document.write('<script src="http://'+host+'/js/jquery.min.js"\></script\>');
  </script>
    </head>
    <body>
  	<script type="text/javascript">
  	window.onload = function () {
  	
  	 var socket = io.connect();
  	 var time = (new Date()).getTime();
       
  	 socket.on('date', function(data) {
          //$('#date').text(data.date);
  		updateChart(data.date.split(","));
  	});
  	 $(document).ready(function(){
          $('#text').keypress(function(e){
            socket.emit('client_data', {
              'letter': String.fromCharCode(e.charCode)
            });
          });
        }); 
  	  
  		var dps = []; // dataPoints
  
  		var hold='';
  
  		var chart = new CanvasJS.Chart("chartContainer",{
  			zoomEnabled: true, 
  			title :{
  				text: "Channel B (Radial or X-axis)"
  			},
              axisX:{
                   maximum:1000,
                   labelFontSize: 20
              },
              axisY:{
                   labelFontSize: 20,
              },
  			
  			data: [{
  				indexLabelFontSize: 26,
  				type: "line",
  				color: "red",
  				dataPoints: dps
  
  			}]
  		});
  
  		var xVal = 0;
  		var yVal = 0;	
  		var updateInterval = 1000;
  		var NewArray = new Array();
  		var dataLength = 500; // number of dataPoints visible at any point
  		var count=1;
  
  		var flag=0;
  		var updateChart = function (NewArray) {
  		
  		       // console.log();
  				if(NewArray[0] != ""){
                      for (var i = 1; i <NewArray.length; i++)
                       {
                          yVal=parseFloat(NewArray[i]);
                         
  
                          dps.push(
                             {
                             x:xVal,
                             y:yVal
                             }
  
                          	);
  
                         xVal++;           
  
                        }
                        
  					if (count==parseInt(3000/NewArray.length-1)) {
  
  
                         flag=1;
  
                        
  					}
  
  
  					if (flag==1) {
  
                       dps.splice(0,NewArray.length-1);
  
                     
  
                       for (var i = 0; i <dps.length; i++) {
                       	chart.options.data[0].dataPoints[i].x=i;
  
                       	
                       }
  
  					}
  
  					chart.options.axisX.maximum =dps.length;					
  				}
  			
  			chart.render();
             count++;
  		};
  	}
  	</script>
  <script type="application/javascript">
  var host = window.location.hostname;
  document.write('<script type="text/javascript" src="http://'+host+'/wave/canvasjs.min.js"\></script\>');
  </script>
      <div id="date"></div>
  	<!--<textarea id="text"></textarea>-->
  	<div id="chartContainer" style="height: 250px; width:100%;"></div>
    </body>
  </html>