// Include gtk#include <gtk/gtk.h>staticvoidon_activate(GtkApplication*app){// Create a new windowGtkWidget*window=gtk_application_window_new(app);// Create a new buttonGtkWidget*button=gtk_button_new_with_label("Hello, World!");// When the button is clicked, close the window passed as an argumentg_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));}intmain(intargc,char*argv[]){// Create a new applicationGtkApplication*app=gtk_application_new("com.example.GtkApplication",G_APPLICATION_FLAGS_NONE);g_signal_connect(app,"activate",G_CALLBACK(on_activate),NULL);returng_application_run(G_APPLICATION(app),argc,argv);}

imports.gi.versions['Gtk']='4.0';constGtk=imports.gi.Gtk;// Create a new applicationletapp=newGtk.Application({application_id:'com.example.GtkApplication'});// When the application is launched…app.connect('activate',()=>{// … create a new window …letwin=newGtk.ApplicationWindow({application:app});// … with a button in it …letbtn=newGtk.Button({label:'Hello, World!'});// … which closes the window when clickedbtn.connect('clicked',()=>{win.close();});win.set_child(btn);win.present();});// Run the applicationapp.run([]);

#!/usr/bin/env perlusestrict;usewarnings;useutf8;useGlib::IO;useGtk4;# Create a new applicationmy$app=Gtk3::Application->new('com.example.Gtk3Application','G_APPLICATION_FLAGS_NONE');# When the application is launched…$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 Gtkimportgigi.require_version('Gtk','4.0')fromgi.repositoryimportGtk# When the application is launched…defon_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 clickedbtn.connect('clicked',lambdax:win.close())win.set_child(btn)win.present()# Create a new applicationapp=Gtk.Application(application_id='com.example.GtkApplication')app.connect('activate',on_activate)# Run the applicationapp.run(None)

useglib::clone;// glib and other dependencies are re-exported by the gtk crateusegtk::glib;usegtk::prelude::*;// When the application is launched…fnon_activate(application:&gtk::Application){// … create a new window …letwindow=gtk::ApplicationWindow::new(application);// … with a button in it …letbutton=gtk::Button::with_label("Hello World!");// … which closes the window when clickedbutton.connect_clicked(clone!(@weakwindow=>move|_|window.close()));window.set_child(Some(&button));window.present();}fnmain(){// Create a new application with the builder patternletapp=gtk::Application::builder().application_id("com.github.gtk-rs.examples.basic").build();app.connect_activate(on_activate);// Run the applicationapp.run();}

intmain(string[]argv){// Create a new applicationvarapp=newGtk.Application("com.example.GtkApplication",GLib.ApplicationFlags.FLAGS_NONE);app.activate.connect(()=>{// Create a new windowvarwindow=newGtk.ApplicationWindow(app);// Create a new buttonvarbutton=newGtk.Button.with_label("Hello, World!");// When the button is clicked, close the windowbutton.clicked.connect(()=>{window.close();});window.set_child(button);window.present();});returnapp.run(argv);}