Entt: listeners in EnTT 2.5.0

[dbacchet]

Hi, this is not an issue but just a question.

I'm still using a decently old (considering the frequency at which you add new features) of EnTT; can you point me to a snippet of code that shows how to associate listeners/callbacks on component creation/destruction?
Is it possible at all in version 2.5.0?
There are listeners in registry.hpp, but was not able to find references to them in the documentation or in the unit tests.

thanks!

[skypjack]

Hi @dbacchet !!

Is it possible at all in version 2.5.0?

Unfortunately no, support for listeners has been introduced with version 2.6.0, I'm sorry.

can you point me to a snippet of code that shows how to associate listeners/callbacks on component creation/destruction?

Do you still need this? I can provide you with an example if you decide to move to v2.6.0, it's not a problem.

[dbacchet]

I will try to move to 2.6 or the most recent then. A snippet would be very appreciated!
thanks!

[skypjack]

Sure, not a problem. Just let me know if you move to version 2.6/2.7.3 or to the v3 branch, because API are different.

[dbacchet]

I’ll try with the latest stable 2.7.x to minimize changes for now.
Would you recommend to give v3 a try?

On Sep 19, 2018, at 07:15, Michele Caini [e-mail] wrote:

Sure, not a problem. Just let me know if you move to version 2.6/2.7.3 or to the v3 branch, because API are different.

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[skypjack]

v3 is a porting of v2.7.3 to C++17, it's stable enough and going to be the next major release. On the other side, you got it: moving to v3 won't minimize the changes! :-)
I'll merge on v3 also the reflection system, probably by the end of the month. Then I'll create a v3.0.0 if everything is ok. You can plan to move the next month if you prefer a smooth change.

[skypjack]

Btw have you already seen this? It's part of the crash course on the ecs stuff and it contains some details signals and listeners.

[dbacchet]

looks great thanks!

[skypjack]

You're welcome! :-)
If you need something else, let me know. Otherwise feel free to close the issue.

[dbacchet]

bumped to 2.7.3 and it works like a charm.

is there a way to have the same notifications also when an _entity_ is created/destroyed?

[skypjack]

I'm glad to know v2.7.3 works fine!!

is there a way to have the same notifications also when an entity is created/destroyed?

Unfortunately no. I think I'll add it in future, because I see sometimes it can be useful.

[dbacchet]

ok, thanks.
For the entity handlers, no pressure, it's easy enough to add that functionality on top of EnTT on my side.
Closing the issue.