gtk_hello_world.c

#include <gtk/gtk.h>

static
void destroy(GtkWidget *widget, gpointer data)
{
	gtk_main_quit() ;
} ;

static
gboolean delete_event(GtkWidget *widget, GdkEvent *event, gpointer data)
{
	return FALSE ;
}

static
gboolean keypress_event(GtkWidget *widget, GdkEvent *event, gpointer data)
{
	GtkWidget **items = (GtkWidget **)data ;
	gtk_window_set_title(GTK_WINDOW(items[0]), "Bing!") ;
	gtk_label_set_text(GTK_LABEL(items[1]), "Bang") ;
	return FALSE ;
}


int main(int argc, char *argv[])
{
	GtkWidget *window, *label ;

	gtk_init(&argc, &argv) ;

	window = gtk_window_new(GTK_WINDOW_TOPLEVEL) ;
	gtk_window_set_title(GTK_WINDOW(window), "Hello, world!") ;
	gtk_container_set_border_width(GTK_CONTAINER(window), 10) ;
	gtk_widget_set_size_request(window, 300, 100) ;
	g_object_set(G_OBJECT(window), "resizable", FALSE, NULL) ;

	g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK(destroy), NULL) ;
	g_signal_connect(G_OBJECT(window), "delete_event", G_CALLBACK(delete_event), NULL) ;

	label = gtk_label_new("Hello world") ;
	gtk_label_set_selectable(GTK_LABEL(label), TRUE) ;

	const GtkWidget *items[2] = {
		window, 
		label
	} ;

	g_signal_connect(G_OBJECT(window), "key_press_event", G_CALLBACK(keypress_event), items) ;


	gtk_container_add(GTK_CONTAINER(window), label) ;
	gtk_widget_show_all(window) ;

	gtk_main() ;

	return 0 ;
}