Provide examples for blocks with signals

[ghost]

I've tried writing a custom volume indicator in my configuration but in order for it to update I need to make use of the interval field set to 1 so that it reflects volume changes. Ideally, I'd raise a signal from dwl-guile bindings and then update the block upon this, but I haven't been able to find any example in dtao-guile's or dtao's documentation to guide me on how to write this.

[Frewacom]

Hi!

After having a closer look, I realized that I have actually forgotten to implement signals 😄

Once implemented, using signals will require you to set a signal number in the block configuration, and the block will automatically re-render upon receiving that signal (i.e. you send a signal to dtao-guile using e.g. pkill).