Vincenzo,
When you call google.setOnLoadCallback() it always takes a function, not a
function call and setOnLoadCallback always calls that function with no
arguments. Sounds like you might be stuck, except you can create another
function that calls your drawChart function with one or more arguments. So
instead of
google.setOnLoadCallback(drawChart);
you would want something like this:
google.setOnLoadCallback(function() { drawChart(123) });
Hope that helps.
On Fri, Jun 13, 2014 at 11:10 AM, Vincenzo Diligente Tizzani <
[email protected]> wrote:
> Hi,i have a question.
> This is my index.php:
> <html>
> <head>
> <meta charset="UTF-8">
> <title>Prova</title>
>
>
>
> <!--Load the AJAX API-->
> <script type="text/javascript" src="https://www.google.com/jsapi
> "></script>
> <script type="text/javascript" src="//
> ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
> <script type="text/javascript">
>
> // Load the Visualization API and the piechart package.
> google.load('visualization', '1', {'packages':['corechart']});
>
> // Set a callback to run when the Google Visualization API is loaded.
> google.setOnLoadCallback(drawChart);
>
> function drawChart(num) {
> var json = $.ajax({
> url: "prova.php",
> data: "q="+num,
>
> dataType:"json",
> async: false
> }).responseText;
>
>
> // Create our data table out of JSON data loaded from server.
> var datachart = new google.visualization.DataTable(json);
>
> var options = {
>
> is3D: 'true',
> width: 800,
> height: 600
>
> };
> var chart = new
> google.visualization.PieChart(document.getElementById('chart_div'));
> chart.draw(datachart,options);}
>
>
> </script>
>
> <form>
> <select name="Parametr" onchange="drawChart(this.value)">
> <option value="">Select a Parameter:</option>
> <option value="Param1">Parametr1</option>
> <option value="Param2">Parametr2</option>
> <option value="Param3">Parametr3</option>
>
> </select>
> <select name="Sistem" >
> <option value="">Select a Component:</option>
> <option value="comp1">Component1</option>
> <option value="comp2">Component2</option>
> <option value="comp3">Component3</option>
> </select>
> </form>
>
>
> </head>
>
> <body>
> <div id="chart_div" style="width: 500px; height: 500px;"></div>
>
> </body>
> </html>
>
> how do I pass two values to the function drawChart?
>
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--
Daniel LaLiberte <https://plus.google.com/100631381223468223275?prsrc=2> -
978-394-1058
[email protected] <[email protected]> 5CC, Cambridge MA
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