when using printView in dhtmlxtreegrid

Hi, I used printView() function to export as excel format.
It works well. but, the hidden columns and rows didn’t print. This is commonly correct. But, I should print the hidden data , so, I called
setColumnHidden(false) and expandAll() before calling printView(). It works well, but, It takes much time to open the hidden data because I have lots of data. I want to edit printView function to print all data.
I need your help…


Current version of dhtmlxGrid doesn’t allow increase performance of hiding\showing columns.
If you have a lots of data, hiding\showing it before calling printView() will take a lot of time.