Re: Callback Question

[Roman Makurin <drolyk gmail com>]

Ð ÐÑÐ, 13/04/2008 Ð 15:46 -0300, MatÃÂas Alejandro Torres ÐÐÑÐÑ:
> Hi,
>
> Can I call GTK Functions that modifies the GUI inside a callback?
>
> Just an example:
>
>
> /*CALLBACK*/
> void text_to_upper_callback (GtkEntry *entry, gpointer data) {
>     /* I modify the GUI by setting the text of an entry */
>     gtk_entry_set_text (entry,
>                                      g_utf8_strup (gtk_entry_get_text 
> (entry), -1)));
> }
>
>
> void* init () {
>     [...]
>     g_signal_connect (entry, "activate", (GCallback) 
> text_to_upper_callback, NULL);
>     [...]
> }

#include <gtk/gtk.h>

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

static void convert(GtkButton *button, GtkEntry *entry) {
        gtk_entry_set_text(entry, 
                        g_utf8_strup(gtk_entry_get_text(entry), -1));
}

int main(int argc, char **argv) {
        GtkWidget *window, *entry, *button, *box;

        gtk_init(&argc, &argv);

        window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
        gtk_window_set_title(GTK_WINDOW(window), "Converter");
        gtk_container_set_border_width(GTK_CONTAINER(window), 10);
        gtk_window_set_resizable(GTK_WINDOW(window), FALSE);

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

        box = gtk_hbox_new(FALSE, 0);
        entry = gtk_entry_new();
        button = gtk_button_new_with_mnemonic("_Convert");

        gtk_box_pack_start(GTK_BOX(box), entry, TRUE, TRUE, 0);
        gtk_box_pack_start(GTK_BOX(box), button, FALSE, FALSE, 0);

        g_signal_connect(G_OBJECT(button), "clicked",
                        G_CALLBACK(convert), entry);
        
        gtk_container_add(GTK_CONTAINER(window), box);
        gtk_widget_show_all(window);
        gtk_main();

        return 0;
}

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