Re: Load different data source for same charts in Google Charts

[asgallant]

You're on the right track.  Assuming what you copied here is a straight copy-paste from your HTML, then the problem is likely in the onclick event:

onclick="initialize_charts("year2.json")

The double-quotes at the beginning of year2.json are closing the string holding the event, so what your browser is seeing is onclick="initialize_charts(" which will not work.  Try using single quotes instead:

onclick="initialize_charts('year2.json');"

On Saturday, January 5, 2013 1:03:49 AM UTC-5, saraf....@gmail.com wrote:

Hi,

Overall Problem: I have year-wise data in different JSON files. For each JSON file, I generate 3 charts that are displayed on the webpage. Now the user should be able to select a different year, and the charts should update based on that particular year's data. 

What I have Done: I wrote a function called initialize_charts() which parses the given JSON, prepares data as per google chart requirements and draws those charts. I am calling this function from google.setOnLoadCallback. (as of now I have hardcoded the json file name). 

Main Issue: Now, I am not sure how do I re-render the charts when the user selects some other year's JSON file? Somehow, I should be able to pass-on filename parameter to google.setOnLoadCallback or google.load, such that my initialize_chart reads this new data and re-renders the charts. But I am not sure how. 

What I tried: I tried writing a wrapper function called initialize like this:

    google.setOnLoadCallback(initialize);

    function initialize()

    {

      initialize_charts("year1.json");

    }

So, when it loads first, it loads year1.json data. Then for onclick event i called onclick="initialize_charts("year2.json"). But that doesn't work. I suppose that the placeholders for the charts (div elements) are replaced by the charts itself. So, it can't find those placeholders. 

I would greatly appreciate any sort of help with this. If you need more information or my code, I would be happy to provide. I am stuck on this from the last 2 days :-(

Regards

P