[Bug 52670] Re: Kubuntu setting default components don't affect gnome/gtk apps

[Tsvi Mostovicz]

Ok, I did some analysis of what happens when you set defaults in kde default applications.
As I mentioned above this has nothing to do with kde systemsettings which is just a cute view of kcontrol meant for kubuntu.
When you select another default application for email/browsing etc. kcontrol (which is part of kdebase) runs the following function.

void CfgBrowser::save(KConfig *) {

	KConfig *config = new KConfig("kdeglobals");
	config->setGroup("General");
	QString exec;
	if (radioExec->isChecked())
	{
	   exec = lineExec->text();
	   if (m_browserService && (exec == m_browserExec))
	      exec = m_browserService->storageId(); // Use service
	   else
	      exec = "!" + exec; // Litteral command
	}
	config->writePathEntry("BrowserApplication", exec, true, true);
	config->sync();
	delete config;

        KIPC::sendMessageAll(KIPC::SettingsChanged);

	emit changed(false);
}

If you check the headers, you'll find the function writePathEntry is part of the kconfigbase class.
This function will write a entry to the users home directory at ~/.kde/share/config/some_file (depending on the setting you're changing.)

So to detect changes you'd want something that can detect
KIPC::sendMessageAll(KIPC::SettingsChanged);

The true problem here is as mentioned above, the fact that Thunderbird
doesn't check the browser environment variable but goes directly by
calling x-www-browser which is system wide defined by update-
alternatives and therefore should not be changed on a multi-user
platform.

So yes, there's where I stop the problem seems to be with thunderbird
and not with kde for it not checking user specific variables (where are
they set in gnome?) for the moment.

-- 
Kubuntu setting default components don't affect gnome/gtk apps
https://bugs.launchpad.net/bugs/52670
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