Single Log File for Qt Project.

[qtlinuxnewbie]

hi,

i have a QT project in Linux with 4 windows(corresponding .cpp..h etc.,).
i want to maintain a single Log file for all the 4 windows.
how can i do that?

Actually i tried creating the file and opening in main.cpp but it cannot be used in other .cpp files,
how can i use this file pointer in other windows. i tried with extern keyword but it is not working.

Thanks in advance.

[vishwajeet.dusane]

Have a look at QtMsgHandler qInstallMsgHandler ( QtMsgHandler handler ) function in qt assistant. that will be usable in ur case

[qtlinuxnewbie]

i dint find much information about

QtMsgHandler

.
Could you direct me .

[Lykurg]

you can use the singleton approach for passing the pointer to your four windows. But better you use the solution vishwajeet.dusane suggested you. To find informations use the assistant: On the left choose the tab "index" and type inside the search field "qInstallMsgHandler".

Or use the online documentation: QtGlobal::qInstallMsgHandler().

[qtlinuxnewbie]

i want to use the singleton approach..
so how can i pass the File pointer..
could u suggest singleton

[Lykurg]

Have a look at our wiki: [WIKI]Singleton_pattern[/WIKI].