Hey, On Mon, 2015-09-28 at 19:58 +0200, Daniel Milewski wrote: > As a part of my engineer's thesis I'm developing a interface analysis > tool for GTK+. The tool's purpose is to let one judge how good the > interface design is based on task execution and learning time. It'll > employ a theoretical framework known as the GOMS method[1]. As I hope > to get my code accepted into GTK+, I have a few questions. > > I need to make GTK+ create an event log in runtime. I skimmed through > documentation and the source code and I've found the --gtk-debug > option. My idea was to add a one more debug flag named "goms" to make > analysis conditional. Is it ok? > It'd also be nice to have a way to specify a filename of the event > log. > Since it's not possible to squeeze the filename into the debug > string, > is it ok to introduce a second command line for this?
Note firstly that I’m not a GTK+ maintainer, so these are just my suggestions rather than concrete answers. What kind of events are you wanting to log? Similar-ish stuff has been done for GLib by making it emit SystemTap events if compiled with --enable-systemtap. https://sourceware.org/systemtap/SystemTap_Beginners_Guide/userspace-pr obing.html#uevents I suggest the events be agnostic to your GOMS software. Your software would have a SystemTap script which post-processes these into the format you want, which is specific to your software. > I also wonder if there is a preferred format for dumps of this kind > in > GNOME. I think of going with XML since a lot of other things in GNOME > like interface descriptions also make use of XML. Do you have better > ideas or suggestions on this? > > If XML is ok, then what is the recommended way to generate XML output > in GNOME? I saw that some parts of GTK+ are generating XML from > inline > strings and using convenience functions provided by GMarkup, which is > rather not clean. Is it fine to generate dumps this way? I wonder if > introducing a dependency on e.g. libxml would be better. I doubt that anyone would want to add a dependency on libxml2 to GTK+ simply to output XML. I believe one of the reasons for writing GMarkup in the first place was to avoid a dependency on libxml2, because a lot of its functionality (XSLT transforms!) is unnecessary for most of the use cases GLib and GTK+ have for XML (parsing UI files, mostly). Philip
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