On Thursday 02 of April 2009, Glynn Clements wrote: > Wirawan Purwanto wrote: > > Today most window managers has an area on the top left corner of the > > window decoration which shows a small bitmap, which in Windows world > > called "icon". I wonder if there is any way for an external program, if > > it knows the window ID of a given X11 window, to change that image to > > something else.
> The property in question is WM_HINTS, which is set using the > XSetWMHints() function. The property contains multiple fields, so in > order to preserve any existing hints, you would need to read the > existing value with XGetWMHints(), modify it, then write the updated > value. Nowadays it is actually mostly the _NET_WM_ICON hint from the EWMH spec. Toolkits generally have functions for changing it, although it's a question if they can do it for foreign windows (no idea about Gtk, Qt can't, KDE's NETWinInfo::setIcon() can). > But as Daniel suggests, most window managers provide a mechanism to > override a window's icon (or lack of one). I doubt that's the case, especially when interpreting 'most' as 'most people use'. Still, adding this if necessary should be the best option, given what's below. > This would normally be > preferable to modifying the WM_HINTS property. Apart from anything > else, it's possible that your changes will be discarded whenever the > application (or WM) updates the WM_HINTS property. -- Lubos Lunak KDE developer -------------------------------------------------------------- SUSE LINUX, s.r.o. e-mail: [email protected] , [email protected] Lihovarska 1060/12 tel: +420 284 028 972 190 00 Prague 9 fax: +420 284 028 951 Czech Republic http://www.suse.cz _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
