# Problem with Gtk::Entry#completion= **URL:** \ **Category:** Ruby-Gnome 2\ **Created:** [September 22, 2011, 5:24pm UTC](https://www.ruby-forum.com/t/problem-with-gtk-entry-completion/212124 "2011-09-22T17:24:13Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![luislavena](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/0ea827/32.png) [@luislavena](https://www.ruby-forum.com/u/luislavena)\ **Post date:** [September 22, 2011, 5:24pm UTC](https://www.ruby-forum.com/t/problem-with-gtk-entry-completion/212124/1 "2011-09-22T17:24:13Z")
Hi! Gtk::Entry#completion= should call G\_CHILD\_SET so that the completion won’t be GC’d. Is the addition of a G\_CHILD\_SET(self, rb\_intern(“completion”), completion); the correct way of doing this? If so, can I apply a patch to Subversion? (There are probably a lot more of these cases that need fixing. I’ll try to go through them when I update all the other memory management issues that I’ve seen.) ---
**Author:** ![Nikolai\_W](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/df705f/32.png) [@Nikolai\_W](https://www.ruby-forum.com/u/Nikolai_W)\ **Post date:** [September 23, 2011, 2:42pm UTC](https://www.ruby-forum.com/t/problem-with-gtk-entry-completion/212124/2 "2011-09-23T14:42:44Z")
Nikolai W. wrote in post #1023313: > Hi! > > Gtk::Entry#completion= should call G\_CHILD\_SET so that the completion > won’t be GC’d. Woot. I keep my completion in instance variable to circumvent this bug. It took me 3 or 4 days to understand what was happening. It makes me realize that I never submitted this bug. Thanks for your work. Simon ---
**Author:** ![Nikolai\_W](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/df705f/32.png) [@Nikolai\_W](https://www.ruby-forum.com/u/Nikolai_W)\ **Post date:** [September 23, 2011, 2:51pm UTC](https://www.ruby-forum.com/t/problem-with-gtk-entry-completion/212124/3 "2011-09-23T14:51:44Z")
Hi, In [CADdV=MuvFvHhpu5q=removed\_email\_address@domain.invalid](mailto:CADdV=MuvFvHhpu5q=removed_email_address@domain.invalid) “[ruby-gnome2-devel-en] Problem with Gtk::Entry#completion=” on Thu, 22 Sep 2011 17:23:26 +0200, Nikolai W. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Gtk::Entry#completion= should call G\_CHILD\_SET so that the completion > wont be GCd. > > Is the addition of a G\_CHILD\_SET(self, rb\_intern(“completion”), > completion); the correct way of doing this? Please use G\_CHILD\_ADD() and G\_CHILD\_REMOVE(). > If so, can I apply a patch to Subversion? Yes, please. But please use G\_CHILD\_ADD() and G\_CHILD\_REMOVE() instead. > (There are probably a lot more of these cases that need fixing. Ill > try to go through them when I update all the other memory management > issues that Ive seen.) Thanks!!! – kou ---
**Author:** ![Nikolai\_W](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/df705f/32.png) [@Nikolai\_W](https://www.ruby-forum.com/u/Nikolai_W)\ **Post date:** [September 23, 2011, 3:33pm UTC](https://www.ruby-forum.com/t/problem-with-gtk-entry-completion/212124/4 "2011-09-23T15:33:06Z")
2011/9/23 Kouhei S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > Nikolai W. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > Gtk::Entry#completion= should call G\_CHILD\_SET so that the completion > > won’t be GC’d. > > > > Is the addition of a G\_CHILD\_SET(self, rb\_intern(“completion”), > > completion); the correct way of doing this? > Please use G\_CHILD\_ADD() and G\_CHILD\_REMOVE(). But how should I use G\_CHILD\_REMOVE()? The key for G\_CHILD\_REMOVE is the child itself, which I don’t have a reference to on the next call to set\_completion. ---
**Author:** ![Nikolai\_W](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/df705f/32.png) [@Nikolai\_W](https://www.ruby-forum.com/u/Nikolai_W)\ **Post date:** [September 23, 2011, 3:34pm UTC](https://www.ruby-forum.com/t/problem-with-gtk-entry-completion/212124/5 "2011-09-23T15:34:57Z")
On Fri, Sep 23, 2011 at 14:42, Simon A. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Nikolai W. wrote in post #1023313: > > Gtk::Entry#completion= should call G\_CHILD\_SET so that the completion > > won’t be GC’d. > I keep my completion in instance variable to circumvent this bug. It > took me 3 or 4 days to understand what was happening. That’s how I tested if that was the source of the bug :-). It took me a couple of minutes to realize what was happening, but I perhaps know the source code a bit better and knew that Gtk::Entry#completion= wasn’t implemented as a property and might thus require a G\_CHILD\_\*() call. > It makes me realize that I never submitted this bug. > > Thanks for your work. No problem. ---
**Author:** ![Nikolai\_W](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/df705f/32.png) [@Nikolai\_W](https://www.ruby-forum.com/u/Nikolai_W)\ **Post date:** [September 23, 2011, 4:03pm UTC](https://www.ruby-forum.com/t/problem-with-gtk-entry-completion/212124/6 "2011-09-23T16:03:59Z")
Hi, In [CADdV=MsWVtk-hkaOjZVh8mO4zZJcvmniOkDZP5hTYm=removed\_email\_address@domain.invalid](mailto:CADdV=MsWVtk-hkaOjZVh8mO4zZJcvmniOkDZP5hTYm=removed_email_address@domain.invalid) “Re: [ruby-gnome2-devel-en] Problem with Gtk::Entry#completion=” on Fri, 23 Sep 2011 15:32:25 +0200, Nikolai W. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > to set\_completion. > It seems that you will be able to get the child by > entry\_get\_complet(self). But it’s OK to use G\_CHILD\_SET(). It seems that G\_CHILD\_ADD() and G\_CHILD\_REMOVE() may be complex a bit for this case. ## Thanks, kou ---
**Author:** ![Nikolai\_W](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/df705f/32.png) [@Nikolai\_W](https://www.ruby-forum.com/u/Nikolai_W)\ **Post date:** [September 23, 2011, 3:36pm UTC](https://www.ruby-forum.com/t/problem-with-gtk-entry-completion/212124/7 "2011-09-23T15:36:11Z")
On Fri, Sep 23, 2011 at 15:34, Nikolai W. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > That’s how I tested if that was the source of the bug :-). > > It took me a couple of minutes to realize what was happening, but I > perhaps know the source code a bit better and knew that > Gtk::Entry#completion= wasn’t implemented as a property and might thus > require a G\_CHILD\_\*() call. (That wasn’t a comparison of skill, by the way. Sorry if it sounded like it was.) ---
**Author:** ![Nikolai\_W](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/df705f/32.png) [@Nikolai\_W](https://www.ruby-forum.com/u/Nikolai_W)\ **Post date:** [September 23, 2011, 4:50pm UTC](https://www.ruby-forum.com/t/problem-with-gtk-entry-completion/212124/8 "2011-09-23T16:50:17Z")
2011/9/23 Kouhei S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > Nikolai W. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > to set\_completion. > > It seems that you will be able to get the child by > > entry\_get\_complet(self). Would that work even if the completion had been changed out-side of Ruby-GNOME2? ---
**Author:** ![Nikolai\_W](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/df705f/32.png) [@Nikolai\_W](https://www.ruby-forum.com/u/Nikolai_W)\ **Post date:** [September 24, 2011, 2:12am UTC](https://www.ruby-forum.com/t/problem-with-gtk-entry-completion/212124/9 "2011-09-24T02:12:27Z")
Hi, In [CADdV=Mus7ZVf82=removed\_email\_address@domain.invalid](mailto:CADdV=Mus7ZVf82=removed_email_address@domain.invalid) “Re: [ruby-gnome2-devel-en] Problem with Gtk::Entry#completion=” on Fri, 23 Sep 2011 16:49:21 +0200, Nikolai W. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > to set\_completion. > > > It seems that you will be able to get the child by > > entry\_get\_complet(self). > > Would that work even if the completion had been changed out-side of Ruby-GNOME2? In the case, G\_CHILD\_SET() has a similar problem: 1. set completion by Gtk::Entry#completion=. 2. set copmletion by gtk\_entry\_set\_completion(). XXX. (completion object set by 1. will not be GCed.) 3. set completion by Gtk::Entry#completion=. (completion object set by 1. will be GCed.) G\_CHILD\_ADD()/G\_CHILD\_REMOVE() can’t solve XXX. but G\_CHILD\_SET() can solve it by 3.. But if 3. isn’t done, G\_CHILD\_SET() has the same problem as G\_CHILD\_ADD()/G\_CHILD\_REMOVE(). (Sure, It’s OK for me to use G\_CHILD\_SET(). 🙂 ## Thanks, kou