Gui Event Handler Exception : Illegal Escape Sequence

[subaghasree]

Hi,
My application is on Red Hat Linux using QT4.6.3.
I am using a QTreeView with thousands of rows(some times millions of rows are retrieved) with 10 columns of data. One of the columns use RegExps to convert the data from other column. I get the data from internal database.

When i scroll the view up and down fast, I get below exception
* Gui Event Handler
Caught exception: 'Illegal escape sequence'*

and cannot use the GUI anymore, as i repeatedly get the exception. If i press ok button of exception dialog another exception dialog with the same exception opens up as if in an infinite loop.
I have to kill the application from shell.

Please help me solve this problem
Waiting for reply.

Thanks & Regards,
Subagha

[raven-worx]

please post the reg exp you use...

[subaghasree]

I am converting from one string to another using Regexp
{a[([0-9]*)]} to {b[\1]}

[raven-worx]

use double-backslashes

[subaghasree]

The user can enter the regular expressions so wrong expressions can also be entered, in such cases i get the exceptions and then there is no way to ue the gui except to kill.
So how to handle such illegal exceptions

[raven-worx]

Do you use QRegExp?
you can try QRegExp::isValid() ... but doubt it will work.
Since the user can enter the reg exp it's hardly possible, since when do you know that the user escaped a character on purpose or if you have to escape them for the user...