dynamic GTK+ programming

[tecknophreak]

howdy,

i'm trying to find some ways to do some dynamic programming in GTK+. I can change the data in text fields without a problem.

the problem i'm coming across is trying to "redraw" a vbox or hbox. say i have a window with two buttons in a vbox. when i click on the top one, the vbox will then have 3 buttons in it. would i have to use the canvas or can i do it somehow, all tricky-like?

[tecknophreak]

by using
gtk_container_remove(GtkContainer *, GtkWidget *)

to remove the widgets in the box, then putting new info in.

[megadave]

I'm a little lost on what u mean by dynamic programming. I assume u mean the screen updating when u make a change?

Apparently according to what I read, widgets are intelligent, ie the KNOW when to update themselves on teh screen.

Oh and don't forget about gtk_widget_show();

If u launch into a bunch of processing after a button press and u're app is not mutli-threaded,
the line while(g_main_iteration(FALSE));
is your friend. Just pop it in u're loop, and
it'll run any events that are qued up to be redrawn by Gtk+/Gnome.

That way u avoid the "screen freeze" while
your off calculating pi to 5^10000 digits.

Dave


[EDIT]

I think I just figured out what u meant.
U packed another button into a vbox, and it didn't show?

Oh, and if my suggestions didn't help, post
the code :)

[tecknophreak]

looks like you got what i was saying. the topic should actually programming dynamic windows in GTK+.

Anyway, here's what i did:

Setup:


button1 = gtk_button_new_with_label("button1");
button2 = gtk_button_new_with_label("button2");

g_signal_connect(G_OBJECT(button1), "clicked",
G_CALLBACK(redraw), (gpointer)"button1");

gtk_box_pack_start(GTK_BOX(dynamicHBox), button1, TRUE, TRUE, 0);
gtk_box_pack_start(GTK_BOX(dynamicHBox), button2, TRUE, TRUE, 0);

And the Change:

static void redraw(GtkWidget *widget, gpointer data) {
gtk_container_remove((GtkContainer *)dynamicHBox, button2);

button2 = gtk_button_new_with_label("button3");
gtk_box_pack_start(GTK_BOX(dynamicHBox), button2, TRUE, TRUE, 0);
gtk_widget_show_all(window);
}

of course there's more to it, it'd just take up too much room. thanks for the reply, it might come in handy later!