# Question about properties **URL:** \ **Category:** Ruby-Gnome 2\ **Created:** [June 30, 2006, 12:10am UTC](https://www.ruby-forum.com/t/question-about-properties/96586 "2006-06-30T00:10:31Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Laurent\_J](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/67e7ee/32.png) [@Laurent\_J](https://www.ruby-forum.com/u/Laurent_J)\ **Post date:** [June 30, 2006, 12:10am UTC](https://www.ruby-forum.com/t/question-about-properties/96586/1 "2006-06-30T00:10:31Z")
I’m in the process of learning from the ruby-gnome2 source code and while reading the code I noticed that some function calls are commented and it says something like ‘XXXXX is a property’. An example of this is the VISIBLE attribute in gtk/rbwidget.c line 1053. Could somebody tell me what this means exactly and where is the corresponsing C code to access XXXX actually defined? Thanks for your help! Laurent Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo [http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642](http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642) ---
**Author:** ![Laurent\_J](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/67e7ee/32.png) [@Laurent\_J](https://www.ruby-forum.com/u/Laurent_J)\ **Post date:** [July 3, 2006, 6:02pm UTC](https://www.ruby-forum.com/t/question-about-properties/96586/2 "2006-07-03T18:02:40Z")
Hi, On Fri, 30 Jun 2006 00:07:19 +0200 Laurent J. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I’m in the process of learning from the ruby-gnome2 source code and > while reading the code I noticed that some function calls are commented > and it says something like ‘XXXXX is a property’. An example of this is > the VISIBLE attribute in gtk/rbwidget.c line 1053. > > Could somebody tell me what this means exactly and where is the > corresponsing C code to access XXXX actually defined? GLib properties are auto generated by Ruby/GLib on runtime. So you can access these properties like as Gtk::Widget#foo=, Gtk::Widget#foo unless no C codes. See rbgobj\_define\_property\_accessors() in glib/src/rbgobject.c. – .:% Masao M.[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo [http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642](http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642) ---
**Author:** ![Laurent\_J](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/67e7ee/32.png) [@Laurent\_J](https://www.ruby-forum.com/u/Laurent_J)\ **Post date:** [July 5, 2006, 9:21am UTC](https://www.ruby-forum.com/t/question-about-properties/96586/3 "2006-07-05T09:21:41Z")
Masao M. wrote: > > Could somebody tell me what this means exactly and where is the > > corresponsing C code to access XXXX actually defined? > > GLib properties are auto generated by Ruby/GLib on runtime. > So you can access these properties like as Gtk::Widget#foo=, Gtk::Widget#foo > unless no C codes. > > See rbgobj\_define\_property\_accessors() in glib/src/rbgobject.c. Ok I see. Is this done when calling G\_DEF\_CLASS in each Init\_xxxx function? Thanks Laurent Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo [http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642](http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642) ---
**Author:** ![Laurent\_J](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/67e7ee/32.png) [@Laurent\_J](https://www.ruby-forum.com/u/Laurent_J)\ **Post date:** [July 5, 2006, 5:56pm UTC](https://www.ruby-forum.com/t/question-about-properties/96586/4 "2006-07-05T17:56:24Z")
Hi, On Wed, 05 Jul 2006 09:20:25 +0200 Laurent J. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > > > Ok I see. Is this done when calling G\_DEF\_CLASS in each Init\_xxxx function? No. G\_DEF\_CLASS has another role. It’s better to read these article first below. [http://ruby-gnome2.sourceforge.jp/hiki.cgi?Naming+and+Conversion+Rules](http://ruby-gnome2.sourceforge.jp/hiki.cgi?Naming+and+Conversion+Rules) [http://ruby-gnome2.sourceforge.jp/hiki.cgi?How+to+Implement+Ruby-GNOME2](http://ruby-gnome2.sourceforge.jp/hiki.cgi?How+to+Implement+Ruby-GNOME2) HTH, – .:% Masao M.[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo [http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642](http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642)