gtk liste perche' non va ?

[x110]

il programmino funziona,,,
ma quando dovrebbe aggiungere elementi dalla lista o fare altre azioni
le gtk in consolle mi danno strani errori.....

/* example-start clist clist.c */

#include <gtk/gtk.h>
#include <glib.h>

/* These are just the prototypes of the various callbacks */
void button_add_clicked( GtkWidget *button, gpointer data);
void button_clear_clicked( GtkWidget *button, gpointer data);
void button_hide_show_clicked( GtkWidget *button, gpointer data);
void selection_made( GtkWidget *clist, gint row, gint column,
                     GdkEventButton *event, gpointer data);

gint main (int argc, gchar *argv[])
{
    GtkWidget       *window;
    GtkWidget       *vbox, *hbox;
    GtkWidget       *clist;
    GtkWidget       *button_add, *button_clear, *button_hide_show;
    gchar           *titles[2] = {"Ingredients","Amount"};

    gtk_init(&argc, &argv);


    window=gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_widget_set_usize(GTK_WIDGET(window), 300, 150);

    gtk_window_set_title(GTK_WINDOW(window), "GtkCList Example");
    gtk_signal_connect(GTK_OBJECT(window),
                       "destroy",
                       GTK_SIGNAL_FUNC(gtk_main_quit),
                       NULL);

    vbox=gtk_vbox_new(FALSE, 5);
    gtk_container_border_width(GTK_CONTAINER(vbox), 5);
    gtk_container_add(GTK_CONTAINER(window), vbox);
    gtk_widget_show(vbox);

    /* Create the GtkCList. For this example we use 2 columns */
    clist = gtk_clist_new_with_titles( 2, titles);

    /* When a selection is made, we want to know about it. The callback
     * used is selection_made, and its code can be found further down */
    gtk_signal_connect(GTK_OBJECT(clist), "select_row",
                       GTK_SIGNAL_FUNC(selection_made),
                       NULL);

    /* It isn't necessary to shadow the border, but it looks nice :) */
    //gtk_clist_set_border(GTK_CLIST(clist), GTK_SHADOW_OUT);

    /* What however is important, is that we set the column widths as
     * they will never be right otherwise. Note that the columns are
     * numbered from 0 and up (to 1 in this case).
     */
    gtk_clist_set_column_width (GTK_CLIST(clist), 0, 150);

    /* Scollbars _only when needed_ */
    //gtk_clist_set_policy(GTK_CLIST(clist), GTK_POLICY_AUTOMATIC,
    //                                       GTK_POLICY_AUTOMATIC);

    /* Add the GtkCList widget to the vertical box and show it. */
    gtk_box_pack_start(GTK_BOX(vbox), clist, TRUE, TRUE, 0);
    gtk_widget_show(clist);

    /* Create the buttons and add them to the window. See the button
     * tutorial for more examples and comments on this.
     */
    hbox = gtk_hbox_new(FALSE, 0);
    gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, TRUE, 0);
    gtk_widget_show(hbox);

    button_add = gtk_button_new_with_label("Add List");
    button_clear = gtk_button_new_with_label("Clear List");
    button_hide_show = gtk_button_new_with_label("Hide/Show titles");

    gtk_box_pack_start(GTK_BOX(hbox), button_add, TRUE, TRUE, 0);
    gtk_box_pack_start(GTK_BOX(hbox), button_clear, TRUE, TRUE, 0);
    gtk_box_pack_start(GTK_BOX(hbox), button_hide_show, TRUE, TRUE, 0);

    /* Connect our callbacks to the three buttons */
    gtk_signal_connect_object(GTK_OBJECT(button_add), "clicked",
                              GTK_SIGNAL_FUNC(button_add_clicked),
                              (gpointer) clist);
    gtk_signal_connect_object(GTK_OBJECT(button_clear), "clicked",
                              GTK_SIGNAL_FUNC(button_clear_clicked),
                              (gpointer) clist);
    gtk_signal_connect_object(GTK_OBJECT(button_hide_show), "clicked",
                              GTK_SIGNAL_FUNC(button_hide_show_clicked),
                              (gpointer) clist);

    gtk_widget_show(button_add);
    gtk_widget_show(button_clear);
    gtk_widget_show(button_hide_show);

    /* The interface is completely set up so we show the window and
     * enter the gtk_main loop.
     */
    gtk_widget_show(window);
    gtk_main();

    return 0;
};

/* User clicked the "Add List" button. */
void button_add_clicked( GtkWidget *button, gpointer data)
{
    int         indx;

    /* Something silly to add to the list. 4 rows of 2 columns each */
    gchar      *drink[4][2] = {{"Milk", "3 Oz"},
                               {"Water", "6 l"},
                               {"Carrots", "2"},
                               {"Snakes", "55"}};

    /* Here we do the actual adding of the text. It's done once for
     * each row.
     */
    for( indx=0; indx < 4; indx++)
        gtk_clist_append( (GtkCList*) data, drink[indx]);

    return;
};

/* User clicked the "Clear List" button. */
void button_clear_clicked( GtkWidget *button, gpointer data)
{
    /* Clear the list using gtk_clist_clear. This is much faster than
     * calling gtk_clist_remove once for each row.
     */
    gtk_clist_clear((GtkCList*) data);

    return;
};

/* The user clicked the "Hide/Show titles" button. */
void button_hide_show_clicked( GtkWidget *button, gpointer data)
{
    /* Just a flag to remember the status. 0 = currently visible */
    static short int flag = 0;

    if (flag == 0)
    {
        /* Hide the titles and set the flag to 1 */
        gtk_clist_column_titles_hide((GtkCList*) data);
        flag++;
    }
    else
    {
        /* Show the titles and reset flag to 0 */
        gtk_clist_column_titles_show((GtkCList*) data);
        flag--;
    }

    return;
};

/* If we come here, then the user has selected a row in the list. */
void selection_made( GtkWidget *clist, gint row, gint column,
                     GdkEventButton *event, gpointer data)
{
    gchar       *text;

    /* Get the text that is stored in the selected row and column
     * which was clicked in. We will receive it as a pointer in the
     * argument text.
     */
    gtk_clist_get_text(GTK_CLIST(clist), row, column, &text);

    /* Just prints some information about the selected row */
    g_print("You selected row %d. More specifically you clicked in column %d, and the text in this cell is %s\n\n", row, column, text);

    return;
}

[mjordan]

Sarebbe stato meglio elencare gli errori , tu che dici???

[mjordan]

A proposito, stai studiando sul libro che ti diedi io??? Donna O' Martins??

[x110]

non sto studiando su quel libro,,,sorry
ridammi il link dove lo si puo comprare per cortesia.

gli errori che mi da sono in fase di compilazione non mi riconosce 2 funzioni che ho
remmato,
a run time cliccando sul primo tasto mi dice:

(gtk:5518): Gtk-CRITICAL **: file gtkclist.c: line 2667 (gtk_clist_append): assertion `GTK_IS_CLIST (clist)' failed

(gtk:5518): Gtk-CRITICAL **: file gtkclist.c: line 2667 (gtk_clist_append): assertion `GTK_IS_CLIST (clist)' failed

(gtk:5518): Gtk-CRITICAL **: file gtkclist.c: line 2667 (gtk_clist_append): assertion `GTK_IS_CLIST (clist)' failed

(gtk:5518): Gtk-CRITICAL **: file gtkclist.c: line 2667 (gtk_clist_append): assertion `GTK_IS_CLIST (clist)' failed

il problema e' sicuramente nel modo in cui i parametri vengono passati
perche' se io lavoro sulla lista direttamente senza passare il puntatore della lista
ad un'altra funzione tutto va liscio, eccetto per

/* Scollbars _only when needed_ */
//gtk_clist_set_policy(GTK_CLIST(clist), GTK_POLICY_AUTOMATIC,
// GTK_POLICY_AUTOMATIC);

/* It isn't necessary to shadow the border, but it looks nice */
//gtk_clist_set_border(GTK_CLIST(clist), GTK_SHADOW_OUT);

grazie.