每次选择某个选项卡时，Gtk Notebook调用功能

Question

I want a tab on my notebook that pretty much does the same like a button. Every time I select this tab it should execute a certain job (for example print('something') ).

How do I get it to execute every time I open it? Right now it just executes once on startup and that's it.

If someone has some advice on this subject I'd really apreciate some help!

Answer 1

You're looking for the switch-page signal :

def callback(notebook, tab, index):
    if index == index_of_the_tab:
        print('selected')

    # alternatively:
    # if tab is the_tab:
    #     print('selected')

notebook.connect('switch-page', callback)

Answer 2

You can use the switch-page signal.

The callback prototype includes the page number id so that you can figure out to which page you are switching.

void user_function (GtkNotebook *notebook, GtkWidget *page, guint page_num, gpointer user_data)