Situation

So, now you’re working on a fancy formatted file and would like to have a preview of what your translation looks like. To do that, you save in OmegaT (Ctrl+S), create translated document (Ctrl+D), and open it in LibreOffice or OpenOffice.org. A bit awkward, and you wish there were a preview button in OmegaT, but oh well, as long as it gets things done, you’ll bare with it.

Problem

But oops, the document was already open, and opening it again doesn’t automatically update the view in Office. Luckily, there is File → Reload functionality now both in LibreOffice and in OpenOffice.org, so you don’t have to close the document and reopen it again.

Solution

1. You can use “Priorview” preview utility. Neat solution, one of the huge benefits of which is that you can use Abiword — a really lightweight and fast text processor. If you have used Marc’s scripts before then you have Tcl/Tk installed, otherwise you’ll have to take care of that part.
2. You can use a macro in LibreOffice or OpenOffice.org that would reload the document every n seconds. The text of the macro is here:

   sub ReloadDocument
   dim document   as object
   dim dispatcher as object
   document   = ThisComponent.CurrentController.Frame
   dispatcher = createUnoService("com.sun.star.frame.DispatchHelper")
   Do While True
         Wait(15000 * secs)
   dispatcher.executeDispatch(document, ".uno:Reload", "", 0, Array())
   Loop
   end sub
   

   Here it’s set to reload document every 15 seconds. It’s set in line 7 in this example, which is Wait(15000 * secs). Change to whatever value you need (the value must be given in milliseconds).

To add macro you need to press My Macros → Standard → Module1 in the list on the left, and press Edit button. In the Macros Editor window go to the very end of the text, start a new line and insert the above given macro. Save and close.
Now, when you open the target document that you want to preview, you can run this macro, either by assigning a shortcut and/or creating a toolbar button for it (details in LibreOffice/OpenOffice.org help file), or by launching it from menu Tools → Macros → Run Macro and from there navigating to My Macros → Standard → Module1 → ReloadDocument macro and pressing Runstrong> button.
To terminate the macro, press Shift+Ctrl+Q

P.S. When working on a Team project, it might be wise to set the reload value to 3 minutes (180000) or higher.
But as of now,
Good luck!

Update
For now, better stick with “Priorview” preview utility, as with the above macro the document scrolls back to the beginning or last saved position (it depends on the file type and one additional setting in the office suite) on each reload. Once a workaround is found, the solution will be updated.