gtk2 function notebookGetCurrentPagePassive

[keera-studios]

gtk2 function notebookGetCurrentPagePassive

[ivanperez-keera]

A passive reactive value is one that does not actively notify events or push notifications forward. That means if you write

somePassiveReactiveValue =:> someOtherReactiveValue

In principle, probably nothing would ever get executed.

They are used in two scenarios:

1. To pair them with events and turn them into active reactive values.
2. To pair them with active reactive values (governing).

For instance, you could do something like:

someButtonsButtonClick `governing` somePassiveReactiveValue=:> someOtherReactiveValue

And that will make the RV pass the data when the button is clicked.

Does that make sense?

As for the (-1), that means the notebook currently has no pages. The underlying function giving you the (-1) is https://developer.gnome.org/gtk3/stable/GtkNotebook.html#gtk-notebook-get-current-page

[ivanperez-keera]

If you want, paste a link to your code and I'll take a look.

[stewedFOSP]

I needed to clear all elements on a page, and was intended to delete the current page and create a new one. I thought this would be easier, but then found that it's faster to directly delete the elements on the page. So I managed to do it without notebookGetCurrentPagePassive.
https://gitlab.com/chupin/arpeggigon/commit/345509022c1a7eea311158361bcdbaa2fbc24c32