GTK v1.2 Tutorial(英文)

gtk_init (&argc, &argv);

window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_show (window);

/* example-start helloworld helloworld.c */
#include <gtk/gtk.h>
/* This is a callback function. The data arguments are ignored
 * in this example. More on callbacks below. */
void hello( GtkWidget *widget,
gpointer data )
{
g_print ("Hello World
");
}
gint delete_event( GtkWidget *widget,
 GdkEvent*event,
 gpointer data )
{
/* If you return FALSE in the "delete_event" signal handler,
 * GTK will emit the "destroy" signal. Returning TRUE means
 * you don't want the window to be destroyed.
 * This is useful for popping up 'are you sure you want to quit?'
 * type dialogs. */
g_print ("delete event occurred
");
/* Change TRUE to FALSE and the main window will be destroyed with
 * a "delete_event". */
return(TRUE);
}
/* Another callback */
void destroy( GtkWidget *widget,
gpointer data )
{
gtk_main_quit();
}
int main( int argc,
char *argv[] )
{
/* GtkWidget is the storage type for widgets */
GtkWidget *window;
GtkWidget *button;
/* This is called in all GTK applications. Arguments are parsed
 * from the command line and are returned to the application. */
gtk_init(&argc, &argv);
/* create a new window */
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
/* When the window is given the "delete_event" signal (this is given
 * by the window manager, usually by the "close" option, or on the
 * titlebar), we ask it to call the delete_event () function
 * as defined above. The data passed to the callback
 * function is NULL and is ignored in the callback function. */
gtk_signal_connect (GTK_OBJECT (window), "delete_event",
GTK_SIGNAL_FUNC (delete_event), NULL);
/* Here we connect the "destroy" event to a signal handler.
 * This event occurs when we call gtk_widget_destroy() on the window,
 * or if we return FALSE in the "delete_event" callback. */
gtk_signal_connect (GTK_OBJECT (window), "destroy",
GTK_SIGNAL_FUNC (destroy), NULL);
/* Sets the border width of the window. */
gtk_container_set_border_width (GTK_CONTAINER (window), 10);
/* Creates a new button with the label "Hello World". */
button = gtk_button_new_with_label ("Hello World");
/* When the button receives the "clicked" signal, it will call the
 * function hello() passing it NULL as its argument.The hello()
 * function is defined above. */
gtk_signal_connect (GTK_OBJECT (button), "clicked",
GTK_SIGNAL_FUNC (hello), NULL);
/* This will cause the window to be destroyed by calling
 * gtk_widget_destroy(window) when "clicked".Again, the destroy
 * signal could come from here, or the window manager. */
gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
 GTK_SIGNAL_FUNC (gtk_widget_destroy),
 GTK_OBJECT (window));
/* This packs the button into the window (a gtk container). */
gtk_container_add (GTK_CONTAINER (window), button);
/* The final step is to display this newly created widget. */
gtk_widget_show (button);
/* and the window */
gtk_widget_show (window);
/* All GTK applications must have a gtk_main(). Control ends here
 * and waits for an event to occur (like a key press or
 * mouse event). */
gtk_main ();
return(0);
}
/* example-end */