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GTK::Simple is a set of simple GTK 3 bindings using NativeCall. Only a few GTK widgets are currently implemented. However, these are enough to create a reasonable interactive GUI for an idiomatic Raku program. Widgets are gradually being added. These include the following:

ButtonA simple button with a label and a callback
ComboBoxTextA simple combo box
EntryAllows for text to be provided by the user
FileChooserButtonA button that opens a file chooser dialog
FrameA bin with a decorative frame and optional label
GridA table-like container for widgets for window design
LabelAdds a line of text
LevelBarA bar that can used as a level indicator
LinkButtonCreate buttons bound to a URL
MarkUpLabelAdds text with GTK mark up (e.g. color and font manipulation)
MenuA simple menu with a menu item label
MenuBarA simple menu bar that contain one or more menus
MenuItemA simple menu item that can have a sub menu
MenuToolButtonA menu tool button with a label or an icon
PlacesSidebarSidebar that displays frequently-used places in the file system
ScaleAllows for a number to be provided by the user
ScrolledWindowContainer for widgets needing scrolling, eg., multiline texts
RadioButtonA choice from multiple check buttons
SpinnerShowing that something is happening
TextViewAdds multiple lines of text
ToolbarA tool bar that can contain one or more menu tool buttons
VBox, HBoxWidget containers which enable window layout design


use GTK::Simple;
use GTK::Simple::App;

my $app = GTK::Simple::App.new( title => "Hello GTK!" );

        my $button = GTK::Simple::Button.new(label => "Hello World!"),
        my $second = GTK::Simple::Button.new(label => "Goodbye!")

$app.border-width = 20;
$second.sensitive = False;
$button.clicked.tap({ .sensitive = False; $second.sensitive = True });
$second.clicked.tap({ $app.exit; });

The first three or four examples were written as mini tutorials to show how the system works. For more examples, please see the examples folder.


The full functionality of GTK 3 is not available in this module.


This module requires the GTK3 library to be installed. Please follow the instructions below based on your platform:

Debian Linux

sudo apt-get install libgtk-3-dev

Mac OS X

brew update
brew install gtk+3


Precompiled GTK3 DLLs are installed automatically with module installation.


To install it using zef (a module management tool bundled with Rakudo Star):

$ zef install GTK::Simple


$ prove -e "perl6 -Ilib"
$ zef install Test::META
$ AUTHOR_TESTING=1 prove -e "perl6 -Ilib"


Jonathan Worthington, jnthn on #perl6, https://github.com/jnthn/


The Raku team


The Artistic License 2.0