cancel gtk_main_quit and return to the main window

[Emanoil Kotsev <deloptes yahoo com>]

Hello,

sorry for the may be trivial question, but I'm sure someone could tell me
the right way to go, finding the answer.

I'm not new to perl or c/c++ and I have tried earlier gtk and gtk++, but now
for first time I've written an almost complete application in gtk + perl. I
did some design in glade and load the widgets with GladeXML.
It was very appreciated exercise but I came to a point where I don't know
what to do.

when I close the app I check if data has been modified, if so a a window
shows up and asks [save|cancel|quit].

if [save]   then the program writes data and exits
if [cancel] then the main window is shown
if [quit]   then the app quits

So running _Quit from the menu works as expected but the problem is when I
click the window close button and click cancel afterwords. The widgets are
destroyed so empty gray box appears.

The question is how can I "cancel" the gtk_main_quit when data is not saved
and I want to return to main window?

how can I prevent the destruction of the widgets?

thanks in advance and regards