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5 non-PAUSE users.

Torsten Schönfeld
and 1 contributors


Gtk3 - Perl interface to the 3.x series of the gtk+ toolkit


  use Gtk3 -init;
  my $window = Gtk3::Window->new ('toplevel');
  my $button = Gtk3::Button->new ('Quit');
  $button->signal_connect (clicked => sub { Gtk3::main_quit });
  $window->add ($button);


Perl bindings to the 3.x series of the gtk+ toolkit. This module allows you to write graphical user interfaces in a Perlish and object-oriented way, freeing you from the casting and memory management in C, yet remaining very close in spirit to original API.


The Gtk3 module allows a Perl developer to use the gtk+ graphical user interface library. Find out more about gtk+ at http://www.gtk.org.

The gtk+ reference manual is also a handy companion when writing Gtk3 programs in Perl: http://developer.gnome.org/gtk3/stable/. The Perl bindings follow the C API very closely, and the C reference documentation should be considered the canonical source.

To discuss Gtk3 and ask questions join gtk-perl-list@gnome.org at http://mail.gnome.org/mailman/listinfo/gtk-perl-list.

Also have a look at the gtk2-perl website and sourceforge project page, http://gtk2-perl.sourceforge.net.

Porting from Gtk2 to Gtk3

The majority of the API has not changed, so as a first approximation you can run s/Gtk2/Gtk3/ on your application. A big exception to this rule is APIs that were deprecated in gtk+ 2.x -- these were all removed from gtk+ 3.0 and thus from Gtk3. The migration guide at http://developer.gnome.org/gtk3/stable/migrating.html describes what to use instead. Apart from this, here is a list of some other incompatible differences between Gtk2 and Gtk3:

  • The call syntax for class-static methods is now always Gtk3::Stock::lookup instead of Gtk3::Stock->lookup.

  • The %Gtk2::Gdk::Keysyms hash is gone; instead of Gtk2::Gdk::Keysyms{XYZ}, use Gtk3::Gdk::KEY_XYZ.

  • The Gtk2::Pango compatibility wrapper was not carried over; simply use the namespace "Pango" everywhere. It gets set up automatically when loading Gtk3.

  • The types Gtk3::Allocation and Gtk3::Gdk::Rectangle are now aliases for Cairo::RectangleInt, and as such they are represented as plain hashes with keys 'width', 'height', 'x' and 'y'.

  • Gtk3::Editable: Callbacks connected to the "insert-text" signal do not have as many options anymore as they had in Gtk2. Changes to arguments will not be propagated to the next signal handler, and only the updated position can and must be returned.

  • Gtk3::Menu: The position callback passed to popup() does not receive x and y parameters anymore.

  • Gtk3::TreeModel: iter_next() is now a method that is modifying the iter directly, instead of returning a new one. rows_reordered() and the "rows-reordered" signal are currently unusable.

  • Gtk3::TreeSelection: get_selected_rows() now returns two values: an array ref containing the selected paths, and the model. get_user_data() is not available currently.

  • Gtk3::TreeSortable: get_sort_column_id() has an additional boolean return value.

  • Gtk3::TreeStore, Gtk3::ListStore: reorder() is currently unusable.

  • Gtk3::Gdk::Atom: The constructor new() is not provided anymore, and the class function intern() must now be called as Gtk3::Gdk::Atom::intern (name, only_if_exists).

  • Implementations of Gtk3::TreeModel: Gtk3::TreeIter now has a constructor called new() expecting key => value pairs; new_from_arrayref() does not exist anymore. To access the contents of Gtk3::TreeIter, use stamp(), user_data(), user_data2() and user_data3(); to_arrayref() does not exist anymore. GET_ITER(), ITER_CHILDREN(), ITER_NTH_CHILD() and ITER_PARENT() must return an additional boolean value. ITER_NEXT() must modify the iter and return a boolean rather than return a new iter. GET_VALUE() must return the value wrapped with Glib::Object::Introspection::GValueWrapper->new.

  • Implementations of Gtk3::CellLayout: GET_CELLS() now needs to return an array ref instead of a list.

Note also that Gtk3::CHECK_VERSION will always fail when passed 2.y.z, so if you have any existing version checks in your code, you will most likely need to remove them.




Torsten Schönfeld <kaffeetisch@gmx.de>


Copyright (C) 2011-2013 by Torsten Schoenfeld <kaffeetisch@gmx.de>

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.