hello.c
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#include <gtk/gtk.h>
static int counter = 0;
void greet( GtkWidget *widget, gpointer data )
{
// printf equivalent in GTK+
g_print ("Hello World! Welcome to GTK\n");
g_print ("%s clicked %d times\n",
(char*)data, ++counter);
}
void destroy( GtkWidget *widget,gpointer data )
{
gtk_main_quit ();
}
int main( int argc,char *argv[] )
{
GtkWidget *window;
GtkWidget *button;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
g_signal_connect (window, "destroy",
G_CALLBACK (destroy), NULL);
/* Let's set the border width of the window to 20.
* You may play with the value and see the
* difference. */
gtk_container_set_border_width
(GTK_CONTAINER (window), 20);
button = gtk_button_new_with_label ("Hello World!");
g_signal_connect (GTK_OBJECT(button),
"clicked",G_CALLBACK (greet),
"button");
gtk_container_add (GTK_CONTAINER (window), button);
gtk_widget_show_all(window);
gtk_main ();
return 0;
}
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./hello