How to handle the Direction of printing grid panel in ext.net

I'm using a grid panel in my web page .. i added a toolbar contains printing button in the grid panel to print the content of the grid view .. 

the layout direction of the grid is from Right to Left (RTL) to be suitable with arabic ..
but when i press on the button (print) the grid direction appeared from left to right , which is not correct ..

< ext:Button ID="btnPrintPageGrid" runat="server" Text="طباعة الصفحة الحالية فقط" Icon="Printer" Handler="this.up('grid').print({currentPageOnly : true });" />

i searched for any option to add to the functionality of the button , but i didn't find, also i tried to add (rtl : true) , but it doesn't work...

Any help ???