Custom Properties to Handler Function

[Jay]

Does anyone know the easiest way to set additional or custom parameters to the handler function?

var query = new google.visualization.Query(URL);

var queryString = "Select * limit 20";

query.setQuery(queryString);

query.send(handleResponse);

function handleResponse(response){

  // response[myCustomVariable]  #how to set this variable?

}

[asgallant]

I'm not sure what your purpose here is - why would you need to modify anything in the response object?  Or are you asking how to pass a value for "myCustomVariable" to the handleResponse function?

If the latter case is what you are after, then you can get around the problem by passing the Query#send() method an anonymous function, like this:

var myCustomVariable;

query.send(function (response) {

    // this is the query response handler function

    // use myCustomVariable in here

});

[Jay]

Hi ,

Thanks for your response.

I just wanted to know, is there an explicit way to pass additional parameter to the handler function other than the default response object.

My purpose was to generate N number of charts in the same page, with the N requests made consecutively and each request differ from one another by few properties like Query, URL Parameters etc.

I resolved it by the following method.

<div id='chart1'></div>

<div id='chart2'></div>

var query = {};

var queryString = {};

var temp = null;

for(var i=0;i<2;i++){

  temp = i; 

  query[temp]   = new google.visualization.Query(URL+temp);

  queryString[temp] = "Select Col"+temp+ " limit 20"; 

  query[temp].setQuery(queryString[temp]);

  (function(inIndex){

    query[inIndex].send(function(response){

        response['displayIndex'] = inIndex;

        handleResponse(response);

     });

     );  

  })(temp);

}

function handleResponse(response){

   // pass the relevant container name to the chart instance.

}

Let me know if there is a better way than this. 

Thanks

[asgallant]

Pretty much everything I can think of is a variant on what you're doing already, so as long as that works, I'd go with it.