Gtk2::TrayManager - Perl bindings for EggTrayManager


        use Gtk2 -init;
        use Gtk2::TrayManager;

        my $screen = Gtk2::Gdk::Screen->get_default;

        if (Gtk2::TrayManager->check_running($screen)) {
                print STDERR "A tray manager is already running, sorry!\n";
                exit 256;

        my $tray = Gtk2::TrayManager->new;

        $tray->signal_connect('tray_icon_added', sub {
                # $_[1] is a Gtk2::Socket

        $tray->signal_connect('tray_icon_removed', sub {
                # $_[1] is a Gtk2::Socket


The EggTrayManager library is used internally by GNOME to implement the server-side of the Notification Area (or system tray) protocol. Gtk2::TrayManager allows you to create notification area applications using Gtk2-Perl.


        $running = Gtk2::TrayManager->check_running($screen);

This method returns a boolean value indicating whether another program is already managing notifications for the given Gtk2::Gdk::Screen. If this method returns a false value, then you should give way to the application that is already running.

        $tray = Gtk2::TrayManager->new;

This creates a tray manager object.


This tells the tray to manage notifications for the Gtk2::Gdk::Screen referenced by $screen.


This method tells the tray whether icons are to be arranged vertically or horizontally. $orientation may be either 'vertical' or 'horizontal'.

        $title = $tray->get_child_title($child);

This method returns a string containing the title of the icon defined by $child.



Emitted when a client plug (eg one created by Gtk2::TrayIcon) wants to connect. For callbacks connected to this signal, @_ will have the form

        @_ = (
                bless( {}, 'Gtk2::TrayManager' ),
                bless( {}, 'Gtk2::Socket' )

Emitted when a client plug has disconnected. For callbacks connected to this signal, @_ will have the form

        @_ = (
                bless( {}, 'Gtk2::TrayManager' ),
                bless( {}, 'Gtk2::Socket' )
message_sent, message_removed

The specification includes support for "balloon messages", but these are not currently implemented in EggTrayManager.


As a rule, compliant applications should check to for an already running manager, and give way to it if it finds one. However, it is possible that your application might have its X selection forcibly removed; this signal is emitted if this should happen.


Glib, Gtk, Gtk2::TrayIcon and the System Tray spec at


Christian Borup <borup at cpan dot org>. Nagging and documentation by Gavin Brown <>


Copyright 2004 by the gtk2-perl team.

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 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details.

You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 USA.