GTK+ 2.0 Tutorial
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# Table Packing Example

Here we make a window with three buttons in a 2x2 table. The first two buttons will be placed in the upper row. A third, quit button, is placed in the lower row, spanning both columns. Which means it should look something like this:

Here's the source code:

    #include <gtk/gtk.h>

    /* Our callback.
     * The data passed to this function is printed to stdout */
    void callback( GtkWidget *widget,
                   gpointer   data )
    {
        g_print ("Hello again - %s was pressed\n", (char *) data);
    }

    /* This callback quits the program */
    gint delete_event( GtkWidget *widget,
                       GdkEvent  *event,
                       gpointer   data )
    {
        gtk_main_quit ();
        return FALSE;
    }

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

        gtk_init (&argc, &argv);

        /* Create a new window */
        window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

        /* Set the window title */
        gtk_window_set_title (GTK_WINDOW (window), "Table");

        /* Set a handler for delete_event that immediately
         * exits GTK. */
        g_signal_connect (G_OBJECT (window), "delete_event",
                          G_CALLBACK (delete_event), NULL);

        /* Sets the border width of the window. */
        gtk_container_set_border_width (GTK_CONTAINER (window), 20);

        /* Create a 2x2 table */
        table = gtk_table_new (2, 2, TRUE);

        /* Put the table in the main window */
        gtk_container_add (GTK_CONTAINER (window), table);

        /* Create first button */
        button = gtk_button_new_with_label ("button 1");

        /* When the button is clicked, we call the "callback" function
         * with a pointer to "button 1" as its argument */
        g_signal_connect (G_OBJECT (button), "clicked",
    	              G_CALLBACK (callback), (gpointer) "button 1");

        /* Insert button 1 into the upper left quadrant of the table */
        gtk_table_attach_defaults (GTK_TABLE (table), button, 0, 1, 0, 1);

        gtk_widget_show (button);

        /* Create second button */

        button = gtk_button_new_with_label ("button 2");

        /* When the button is clicked, we call the "callback" function
         * with a pointer to "button 2" as its argument */
        g_signal_connect (G_OBJECT (button), "clicked",
                          G_CALLBACK (callback), (gpointer) "button 2");
        /* Insert button 2 into the upper right quadrant of the table */
        gtk_table_attach_defaults (GTK_TABLE (table), button, 1, 2, 0, 1);

        gtk_widget_show (button);

        /* Create "Quit" button */
        button = gtk_button_new_with_label ("Quit");

        /* When the button is clicked, we call the "delete_event" function
         * and the program exits */
        g_signal_connect (G_OBJECT (button), "clicked",
                          G_CALLBACK (delete_event), NULL);

        /* Insert the quit button into the both
         * lower quadrants of the table */
        gtk_table_attach_defaults (GTK_TABLE (table), button, 0, 2, 1, 2);

        gtk_widget_show (button);

        gtk_widget_show (table);
        gtk_widget_show (window);

        gtk_main ();

        return 0;
    }

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