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using drop down how to change charts using user input value

Viewing 4 posts - 1 through 4 (of 4 total)
  • August 18, 2019 at 11:55 am #26315

    gowri

    how to change charts using dropdown in jquery .charts want to change with user input values
    how can i change.

    Thank you

    August 19, 2019 at 11:00 am #26323

    Manoj Mohan

    @gowri,

    Please take a look at this JSFiddle to change chart type based on the value selected from the dropdown. Similarly, you can change chart options based on selected value from the dropdown.

    —-
    Manoj Mohan
    Team CanvasJS

    August 19, 2019 at 11:52 am #26325

    gowri

    Hi
    I had seen done it but there is an error occurring please give me solutions for it. 

    <html>
<head>
	<meta name="viewport" content="width=device-width, initial-scale=1">

	<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet">  
    <link href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.5.0/css/bootstrap-datepicker.css" rel="stylesheet">  
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.js"></script>  
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>  
    <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.5.0/js/bootstrap-datepicker.js"></script> 
    <script src="https://cdn.anychart.com/js/8.0.1/anychart-core.min.js"></script>
      <script src="https://cdn.anychart.com/js/8.0.1/anychart-pie.min.js"></script>
      <script type="text/javascript" src="https://cdn.canvasjs.com/canvasjs.min.js"></script>
	<title></title>
</head>
<body>

	<div class="container">
<div class="col-md-12">
	
	<div class="col-md-6 form-group">
	
		<h3> DataArea</h3>
      <label for="select">charts</label>
        <select class="form-control" id="chartType" name="Chart Type">
         <!--  <option> select</option> -->
          <option value="Barchart" >Barchart</option>
          <option value="Linechart">LineChart</option>
          <option value="Pie chart">PieChart</option>

           
        </select>
           
	<form class="form">
		  Key:
    <input id="key" name="text" type="text"  value=""  placeholder="Enter X-Value"  > Value:
    <input id="value" type="number" step="any" placeholder="Enter Y-Value">
     <button id="renderButton" onclick="return highlightDuplicates()">Add DataPoint & Render</button>
  
      
           <table class="table table-bordered table-striped" id="maintable">
    <thead>
      <tr>
        <th>key </th>
        <th> value</th>
        
      </tr>
    </thead>
    <tbody class="tbody">
      <tr>
        <td> </td>
        <td> </td>
      
      </tr>
      
    </tbody>
  </table>
   
</form>
    </div>
    <div class="col-md-6 form-group">
    <center><b>	<h3>Charts</h3></b></center>
     <div id="chartContainer1" style="height: 270px; width: 100%;">
    </div>
    <div id="chartContainer2" style="height: 270px; width: 100%;">
    </div>
    </div>
</div>
</div>

</body>
</html>
<script>
	  $(document).ready(function(){
 
    $('form').submit(function(){
    	
        var KEY = $('#key').val();
        var VALUE = $('#value').val();
        
        
           var markup = "<tr><td>" + KEY + "</td><td>" + VALUE + "</td></tr>";
         $("table tbody").append(markup);
      return false;  

});
 


 });
	   
        
    </script>
     <script type="text/javascript">
        window.onload = function() {
            var dps = [];  

            var chart = new CanvasJS.Chart("chartContainer1", {
            	animationEnabled: true,
                title: {
                    text: "charts"
                },
               
                data: [{
                    type: "bar",
                    dataPoints: dps
                }]

            });


            function addDataPointsAndRender() {
                key = Number(document.getElementById("key").value);
                value = Number(document.getElementById("value").value);
                dps.push({
                    x: key,
                    y: value
                });
                chart.render();
                
            }


            var renderButton = document.getElementById("renderButton");
            renderButton.addEventListener("click", addDataPointsAndRender);

        }
        var chartType = document.getElementById('chartType');
chartType.addEventListener( "change",  function(){
  chartType.options.data[0].type = chartType.options[chartType.selectedIndex].value;
 
});
 chart.render();


    </script>
    August 20, 2019 at 7:01 pm #26492

    Manoj Mohan

    @gowri,

    There are couple of issue with the code that you have shared.

    1. You need to replace chartType with chart in chartType.options.data[0].type as chartType is referred to dropdown field not the chart object.
    chart.options.data[0].type = chartType.options[chartType.selectedIndex].value;

    2. Below code has to be inside the window.onload function as chart is inside window.onload scope.

    var chartType = document.getElementById("chartType");
        chartType.addEventListener( "change", function(){
        chart.options.data[0].type = chartType.options[chartType.selectedIndex].value;
        chart.render();
});

    Please take a look at this JSFiddle for the complete code.

    Chart with dropdown to change chart type

    —-
    Manoj Mohan
    Team CanvasJS

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