Gtk Notebook“更改当前页面”不起作用

Question

i am using gtk notebook. I need to if user change current page, some button should be active. But current-page-change doesn't work, so nothing happens. I tried "switch-page" signal but it gives me previous page number when i asked "notebook.page". But i need to if user change current page, i should know which page is selected.

Answer 1

The switch-page signal sends the new page number as argument to the handler, so you can get it without asking the notebook.

The reason the notebook doesn't answer correctly is that when switch-page is handled, the switch did not yet complete. (This allows your handler to cancel the switch or switch to a different page.) To connect to the signal after the switch has been performed, call connect_after , in which case you'll get the new page number from the notebook.