GSoC 2011: Week 11

Things worked on this week:

• Using AJAX to get data row on point click. 
• Better support for date/time objects
• Panning feature

Using ajax to get the data row on click reduces the amount of data being passed on to the javascript layer. On data point click the where clause of the point is passed on to the server in request and the data row is returned in response. 

Support for date/time turned out to be rather tricky in Highcharts. The different date/time formats have to be converted into javascript 'date' type to have correct distance between them. Somehow using new Date(dateString) does not produce correct plots. Next I tried code snippet at http://www.mattkruse.com/javascript/date/source.html , which a getDateFromFormat function which return the getTime of the date. So the difference of those getTime() can be a measure of distance between two dates. Will continue on on working on it this week.

Highcharts has an inbuilt zoom feature but not a panning feature. Also, the zoom feature utilizes the mouse click and drag events, so a pan cannot be used with those events. The code snippet at http://jsfiddle.net/HXUmK/4/ provides a method of implementing zoom(mousewheel) and pan(click and drag) manually. Currently I'm trying to integrate it within my code, there are some unresolved issues with use of  setExtremes() functions.