gtk.orgThe GTK Project - A free and open-source cross-platform widget toolkit

GTK Features Docs Community Code Development Blog Create apps that users just love Offering a complete set of UI elements, GTK is suitable for projects ranging from small one-off tools to complete application suites. Learn GTK Downloads Linux Windows MacOS Latest stable v4.0.3 Work with the language of your choice Develop your GTK app with your language of choice by using Language Bindings or wrappers and take full advantage of the official GNOME bindings which guarantee API stability and time-based releases. C JavaScript Perl Python Rust Vala // Include gtk #include <gtk/gtk.h> static void on_activate ( GtkApplication * app ) { // Create a new window GtkWidget * window = gtk_application_window_new ( app ); // Create a new button GtkWidget * button = gtk_button_new_with_label ( "Hello, World!" ); // When the button is clicked, close the window passed as an argument g_signal_connect_swapped ( button , "clicked" , G_CALLBACK ( gtk_window_close ), window ); gtk_window_set_child ( GTK_WINDOW ( window ), button ); gtk_window_present ( GTK_WINDOW ( window )); } int main ( int argc , char * argv []) { // Create a new application GtkApplication * app = gtk_application_new ( "com.example.GtkApplication" , G_APPLICATION_FLAGS_NONE ); g_signal_connect ( app , "activate" , G_CALLBACK ( on_activate ), NULL ); return g_application_run ( G_APPLICATION ( app ), argc , argv ); } imports . gi . versions [ ' Gtk ' ] = ' 4.0 ' ; const Gtk = imports . gi . Gtk ; // Create a new application let app = new Gtk . Application ({ application_id : ' com.example.GtkApplication ' }); // When the application is launched… app . connect ( ' activate ' , () => { // … create a new window … let win = new Gtk . ApplicationWindow ({ application : app }); // … with a button in it … let btn = new Gtk . Button ({ label : ' Hello, World! ' }); // … which closes the window when clicked btn . connect ( ' clicked ' , () => { win . close (); }); win . set_child ( btn ); win . present (); }); // Run the application app . run ([]); #!/usr/bin/env perl use strict ; use warnings ; use utf8 ; use Glib:: IO ; use Gtk4 ; # Create a new application my $app = Gtk3:: Application -> new (' com.example.Gtk3Application ', ' G_APPLICATION_FLAGS_NONE '); # When the application is launched… $app -> signal_connect ( activate => sub { my $app = shift ; # … create a new window … my $win = Gtk3:: ApplicationWindow -> new ( $app ); # … with a button in it … my $btn = Gtk3:: Button -> new (' Hello World! '); # … which closes the window when clicked $btn -> signal_connect ( clicked => sub { $win -> close (); }); $win -> set_child ( $btn ); $win -> present (); } ); # Run the application $app -> run ( \ @ARGV ); # Load Gtk import gi gi . require_version ( 'Gtk' , '4.0' ) from gi.repository import Gtk # When the application is launched… def on_activate ( app ): # … create a new window… win = Gtk . ApplicationWindow ( application = app ) # … with a button in it… btn = Gtk . Button ( label = 'Hello, World!' ) # … which closes the window when clicked btn . connect ( 'clicked' , lambda x : win . close ()) win . set_child ( btn ) win . present () # Create a new application app = Gtk . Application ( application_id = 'com.example.GtkApplication' ) app . connect ( 'activate' , on_activate ) # Run the application app . run ( None ) use gio :: prelude :: * ; use glib :: clone ; use gtk :: prelude :: * ; // When the application is launched… fn on_activate ( application : & gtk :: Application ) { // … create a new window … let window = gtk :: ApplicationWindow :: new ( application ); // … with a button in it … let button = gtk :: Button :: new_with_label ( "Hello World!" ); // … which closes the window when clicked button .connect_clicked ( clone! ( @ weak window => move | _ | window .close ())); window .set_child ( & button ); window .present (); } fn main () { // Create a new application let app = gtk :: Application :: new ( Some ( "com.github.gtk-rs.examples.basic" ), Default :: default ()) .expect ( "Initialization failed..." ); app .connect_activate (| app | on_activate ( app )); // Run the application app .run ( & std :: env :: args () .collect :: < Vec < _ >> ()); } int main ( string [] argv ) { // Create a new application var app = new Gtk . Application ( "com.example.GtkApplication" , GLib . ApplicationFlags . FLAGS_NONE ); app . activate . connect (() => { // Create a new window var window = new Gtk . ApplicationWindow ( app ); // Create a new button var button = new Gtk . Button . with_label ( "Hello, World!" ); // When the button is clicked, close the window button . clicked . connect (() => { window . close (); }); window . set_child ( button ); window . present (); }); return app . run ( argv ); } Apps built with GTK Developers around the world have used GTK as a platform to create apps that solve problems faced by end-users. GIMP Fonts Calculator Dictionary Games Evolution Image Viewer Polari Key Sign Maps Transmission Password Safe Integrations for Rapid Application Development Glade is a RAD tool that enables quick and easy development of user interfaces for the GTK toolkit and the GNOME desktop environment. Check out this easy tutorial on how to create a toolbar using Glade. A feature-rich development tool GTK has all the features that a widget toolkit needs to have. These features make it the most trusted toolkit for developing Linux applications. Portability Projects built using GTK and its dependencies run on well known operating systems. Stability GTK delivers the enticing features and superb performance which adds to your applications. Language Bindings GTK is written in C but has been designed to support a wide range of languages such as Python, JavaScript, C++, Rust and many more . Interfaces GTK has a comprehensive collection of core widgets like Buttons, Windows, Toolbars for use in your application. Open Source GTK is a free and open-source project maintained by GNOME and an active community of contributors. GTK is released under the terms of the GNU Lesser General Public License . API GTK boasts of an easy to use API which helps in decreasing your development time and help you achieve better results. Accommodation GTK caters to many features like Native look and feel, theme support, Object-oriented approach that today’s developers look for in a toolkit. Foundations GTK is built on top of GLib. GLib provides the fundamental data types and system integration points to avoid duplicated code in applications. Develop with GTK By taking advantage of GTK being a cross-platform development tool and its easy to use API, you can develop amazing apps using the GTK. If you are interested in developing an app, get started now by developing this example application . Develop GTK GTK is a large project and relies on volunteers from around the world. To help us with the project development, hack away on the existing bugs and feature requests . Looking for Help? If you want to ask questions about GTK, whether it’s for developing applications with GTK or contributing to GTK itself, you can use the GNOME Discourse instance, under the Platform/Core category. You can use tags like gtk or glib to narrow down the topic of discussion to specific libraries. You can also ask questions on our IRC channel. News and Events Catch up with GTK development Get in touch with GTK developers through IRC . Get daily updates about GTK and its community from GTK blog or through its Twitter account. Meet the community As regularly as possible, GTK team meetings take place at conferences and hackfests to discuss the future of GTK and define a roadmap . Contribute to GTK If you are a developer and want to contribute to GTK, you are more than welcome to do so . GTK is hosted by GNOME. GTK is maintained by the GTK Team . © 1997-2021, The GTK Team. All Rights Reserved. GTK and the GTK logo are trademarks of the GNOME Foundation . PROJECT GTK Features Docs Downloads Lice...