-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jacob Kroon <[EMAIL PROTECTED]> writes:
> Lets say I've written an abstract class Foo (a class that is not > supposed to be instantiated), and a class that inherits from Foo > called Bar, which is instantiable. Foo takes 2 constructor > arguments/properties "x" and "y". Bar:s constructor takes the samt > arguments. In order to initialize some of Bar:s attributes, it needs > to know both "x" and "y". In the bar_init() function I can't get the > "x" and "y" properties, because they arent set yet, so where do I > initialize the attributes? Object properties are set after construction has finished. That is, after the contructors and init functions have been called. You need to override the get_property and set_property vfuncs of GObjectClass, and install properties of type G_PARAM_CONSTRUCT. As an example, have a look at http://arch.debian.org/cgi-bin/archzoom.cgi/[EMAIL PROTECTED]/uterm--mainline--0.1--patch-41/cse/cse-selection.h?template=plain http://arch.debian.org/cgi-bin/archzoom.cgi/[EMAIL PROTECTED]/uterm--mainline--0.1--patch-41/cse/cse-selection.c?template=plain This is a type derived from GObject. Here's an example for a type derived from GtkWidget (hrm, just spotted a bug!): http://arch.debian.org/cgi-bin/archzoom.cgi/[EMAIL PROTECTED]/uterm--mainline--0.1--patch-41/cse/cse-canvas.h?template=plain http://arch.debian.org/cgi-bin/archzoom.cgi/[EMAIL PROTECTED]/uterm--mainline--0.1--patch-41/cse/cse-canvas.c?template=plain > Should I hook into the get/set property of both "x" and "y", and > once both are set (check with some boolean variables), I can > initialize them in bar_set_property() ? That way sounds a little > too complicated so I think I'm missing something. If "x" and "y" are properties of the parent Bar class, simply call g_object_new() with the properties to set. You don't need to do anything more, since it will handle setting the properties for you. Regards, Roger - -- Roger Leigh Printing on GNU/Linux? http://gimp-print.sourceforge.net/ Debian GNU/Linux http://www.debian.org/ GPG Public Key: 0x25BFB848. Please sign and encrypt your mail. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Processed by Mailcrypt 3.5.8 <http://mailcrypt.sourceforge.net/> iD8DBQFCm5EwVcFcaSW/uEgRArahAKCl+DyuixROOQQJmae/5mP5Wc8fzwCbBYm5 Ow8w5Mjsn8qcsHqnp6MZWWw= =jCfR -----END PGP SIGNATURE----- _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
