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Asked: 2026-05-10T23:09:26+00:00

I’ve a question about KConfig usage. I’m able to write and read settings in

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I’ve a question about KConfig usage. I’m able to write and read settings in my .kde4/share/config/_appname_rc configuration file like that

 KConfig basicconf;  KConfigGroup conf = KConfigGroup(basicconf.group('Settings'));  conf.writeEntry('filepath',QString('/path/'));  basicconf.sync();

But I don’t understand how to use a ‘default’ configuration file to read at first time i run my application, or in case if application settings needs reset.

I prefer do not use KConfig XT because my project is tiny and KConfigXT with kcfgc* files seems excessive.

Thank you in advance

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1 Answer

  1. First, this:

    KConfigGroup conf = KConfigGroup(basicconf.group(‘Settings’));

    can be written more clearly, at least imho, as:

    KConfigGroup conf(&basicconf, ‘Settings’);

    Also note that ‘General’ is the most common ‘generic’ group name used. Anyways…

    You can install a default config file with your application; install it to $PREFIX/share/config/, which is easily achieved with this in your CMakeLists.txt file:

    install(FILES <your config file> DESTINATION ${CONFIG_INSTALL_DIR})

    KConfig handles all the magic of merging from there; you don’t have to do a thing.

    As for KConfigXT being overkill, there are many benefits to using it, including automating your config dialogs, ensuring bounds and legal values are enforced, etc. Writing a small file, popping an entry in the CMakeLists.txt file is usually much less work than doing what it gives you for free by hand. There’s a great tutorial on TechBase on this.

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