Glib - Object Properties

["Shay Harding" <sharding ccbill com>]

Hello,

 

I am new to Glib and have been working through constructing an object. I have an object working, but am having issues with the properties. I have the properties working (kind of), but some things don't make sense to me and was hoping someone could explain.

 

I have searched the web and mailing list archives, but can only find data circa 2004 or less and am not really sure if it still pertains today.

 

Currently, I can get/set properties no problem. The issues I am having pertain to how to trap errors during object construction for CONSTRUCT_ONLY properties. If I have a property with flags set to:

 

G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE

 

then I supposedly can only set the property while calling g_object_new(). This is only kind of true. If I attempt to set the property after g_object_new() is called, Glib simply emits a warning, but still allows the property to be set. Actually, this is only true if I call g_object_set_property() within my xxx_set_property() function. The problem is g_object_set_property() returns void so I have no way to catch errors (i.e. property set outside of a constructor).

 

How can CONSTRUCT_ONLY actually be enforced and not emit warnings to stdout/stderr? From what I can tell, I can't even write my own code to do this since I have no access to the static global 'pspec_pool' and the GParamSpec passed to my xxx_set_property() function after construct is NULL (incidentally it seems to always be NULL after the object is constructed even without CONSTRUCT_ONLY set in flags).

 

Thanks for any insight as to why this all works like this and any advice on enforcing policies.

 

 

 

Shay