[HELP] Examples to use block_signal and unblock_signal

[Doublonmousse]

The two fonctions block_signal and unblock_signal don't have examples and I can't seem to find any way to use them because of SignalHandlerId not implementing Clone.

I'd want to setup a spinbutton with a connect_value_changed signal handler and block/unblock this signal when changing the value programmatically to distinguish this from user input (and makind it easier to not have issues related to additional signals being triggered).

But adding custom methods (like a block and unblock)in my template won't work even using a RefCell from this lack of Clone.
I failed to do the "take the Signal handler id -> convert to c_ulong -> reconstruct the signal handler ID" as well. But at this point it's more of a hacky workaround than anything else.

[bilelmoussaoui]

You should store the signal handler in a RefCell<Option> so you can take the value and leave None there.

[bilelmoussaoui]

also use the forum for discussions.

[Doublonmousse]

Well the thing is that this is a operation done once right ?
I need to block/unblock multiple times

[bilelmoussaoui]

Then instead of using .take() you should use borrow().

if let Some(handler) = self.handler.borrow() {}...

[bilelmoussaoui]

The handler is on purpose not Clone, so you don't do unsafe things with it.