Support for redrawing chart from the external script.

[Cervajz]

Hello :c)

thanks for this great library. It had just one inconvenience - it wasn't possible to redraw chart from the outside - for example when you changed size of the browser. It could be possible with this little patch.

I "extracted" function for drawing, so it's not anonymous anymore, so you can call it from your own script. Name of the function is defined from the element_id, like this:

draw_#{element_id}_Chart()

If element_id contains dashes, they are converted to the underscores.

Have a nice day :)

[winston]

In Pull Request 39 #39, I incorporated listeners. Does that help?

[Cervajz]

Listeners are used for different puprpose. They can't help you to redraw the chart after window resizing. The only way how to do it is draw it again - with datatable.

[rvsingh]

It would be great if it can redraw the graph after window re-sizes.

http://stackoverflow.com/questions/18258629/re-sizing-google-charts-with-fluid-bootstrap-layout

[winston]

I have merged these changes, updated the function name, fixed and added specs.

You should be able to redraw the chart from within your JS now. Thank you!