Thanks so much, Andrew. I couldn't possibly wish for a more concise and complete explanation; wish my own research had been as fruitful!
Thanks to you, too, Martin. ~David. On Mon 12 Sep 2011, Andrew Haines wrote: > On 09/12/11 21:59, David Emerson wrote: > > Hi all, > > > > What is the property that determines the window class, as seen by the WM / xorg? > > > > I'm asking for the purpose of grouping: I'd like to be able to have > > distinct > > groups of windows that the WM will group independently of one another. > > > > As an example, looking at the easter/holydays example, if I use KDE3's edit > > window-specific settings dialog I can detect window properties. It shows me > > > > Class: Holyday (holyday Holyday) > > > > and some other stuff. My assumption is that the class is used by the WM to > > determine which windows are grouped together. > > > > The real reason I'm asking is that in fpgui, the class is undefined and I'd like > > to find out how it's done in lazarus, where it IS defined. > > > > Cheers, > > David. > > > > > Lazarus uses other toolkits in linux (gtk, qt) which set these hints > already. So no special steps are done with lazarus to set the windows > class. The toolkit does it for us. > > You can set the class on a window using the Xlib function XAllocClassHint > > Here's the manual page for this function > http://www.xfree86.org/current/XAllocClassHint.3.html > > see especially > http://www.xfree86.org/current/XAllocClassHint.3.html#toc5 > > The first param is the program name and the second is the class name you > want. > > Lastly here's a c example of it's use > http://git.gnome.org/browse/gtk+/tree/gdk/x11/gdkwindow-x11.c#n834 > > > You have to set the class just after the XWindow is created and before > it is shown. > > Regards, > > Andrew > > PS I found all this searching google for: x11 window class grouping > > -- > _______________________________________________ > Lazarus mailing list > Lazarus@lists.lazarus.freepascal.org > http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus > -- _______________________________________________ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus