Gdk(2)Event hierarchy broken??

[mtasaka]

With using alexandria 0.6.9 (with many patches on Fedora) on Fedora 21 , with ruby-gnome 2.1.0 suite, when I click some button alexandra crashes with

/usr/share/ruby/vendor_ruby/alexandria/ui/multi_drag_treeview.rb:108:in `button_press_event': undefined method `window' for #<Gdk::EventButton:0x94c10cc ptr=0xa0004c0 own=true>
     from /usr/share/ruby/vendor_ruby/alexandria/ui/multi_drag_treeview.rb:66:in `block in enable_model_drag_source'
     from /usr/share/ruby/vendor_ruby/alexandria/ui/gtk_thread_help.rb:78:in `call'
     from /usr/share/ruby/vendor_ruby/alexandria/ui/gtk_thread_help.rb:78:in `main'
     from /usr/share/ruby/vendor_ruby/alexandria/ui/gtk_thread_help.rb:78:in `main_with_queue'
     from /usr/share/ruby/vendor_ruby/alexandria/ui.rb:45:in `start_gtk'
     from /usr/share/ruby/vendor_ruby/alexandria/ui.rb:50:in `main'
     from /usr/share/ruby/vendor_ruby/alexandria.rb:40:in `main'
     from /bin/alexandria:38:in `<main>'

This issue does not appear on Fedora 20, which uses ruby-gnome2 2.0.2 suite.

https://developer.gnome.org/gdk2/stable/gdk2-Event-Structures.html#GdkEventAny says that any event pointer can safely be cast to a pointer to a GdkEventAny, which includes "window" member, so I think this is a regression. Also, this old wiki http://ruby-gnome2.sourceforge.jp/hiki.cgi?Gdk%3A%3AEventButton says that Gdk::EventButton inherits Gdk::EventAny , which has "window" method.

Looks like this commit 753593e is the culprit, however I have not checked this in detail.

[kou]

Thanks for your report!
I've fixed it. It seems that gdk3 gem also has the same problem. I'll fix it too.

[mtasaka]

Okay, now alexandria does not crash, thank you.

[kou]

Thanks for confirming it!