This is exactly what I was looking for.
Many thanks.
Den tirsdag den 10. april 2012 19.27.32 UTC+2 skrev asgallant:
>
> I had this exact same problem: i is being evaluated at the time the event
> fires, not at the value it was when it was within the loop. The solution
> is to use a closure, and return a function from within the closure:
>
> for (var i = 0; i < charts.length; i++) {
> google.visualization.events.addListener(charts[i], "ready", (function
> (x) { // note the "(" before "function"
> return function () {
> charts[x].setSelection([{}]);
> }
> })(i)); // note the ")(i)" after the function closes
> }
>
> which binds the variable i to the (local) variable x within the closure.
> Each handler gets its own 'x' value.
>
> On Tuesday, April 10, 2012 12:20:06 PM UTC-4, Jacob Fischer wrote:
>>
>> So, I have a number of charts on the same page, and I want to handle
>> their "ready" event with a generic handler.
>>
>> Say I have an array of charts called charts. I want to do something like
>> this (except the following method doesn't work, but I hope it gets the
>> point across):
>>
>> for (var i = 0; i < charts.length; i++) {
>> google.visualization.events.addListener(charts[i], "ready", function
>> () {
>> charts[i].setSelection([{}]); // Here I want to reference the chart
>> object that fired this event. Doing it like this does not work.
>> });
>> }
>>
>> It would be really nice if charts passed themselves along as a parameter
>> to the handler, but as far as I can read out of the documentation, this is
>> not the case.
>> Basically, I want the equivalent of using $(this) inside a jQuery event
>> handler.
>>
>> Is this possible?
>>
>> Thanks
>>
>
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