How to add onBeginCursorOver to all components of an Actor (Blueprint) ?

[siska]

I’m working on a point&click puzzle game. This means the game has many Actors that can be interacted with (mouse over, mouse out, left mouse button click). Each Actor has a variable number of components (collision shapes or static mesh). The player interacts with an Actor at the level of the component.

If I have to set this up manually for every actor in the game, it will be a huge job. For instance, a box that needs to be unlocked with a key before it opens and the content inside the box can be picked up. For the keyhole alone, I would need to set up 3 events (mouse over/out, click).
I would like to set up the 2 mouse events for all components in onBeginPlay, since they are the same for all components. However, I can’t figure out how to do it.
I can get an array of sceneComponents for the Actor … but then what ? How do I tell each one of them to respond to eg. onCursorOver ?

Can anybody point me in the right direction ? Thanks !

[ClockworkOcean]

This is where blueprint inheritance comes in handy…

You can make a master blueprint, which contains the code for whether components are interactable or not, and what can happen with them etc.

Then all the other blueprints inherit from this master

Unreal Engine - Inheritance Explained

[siska]

Thanks @ClockworkOcean ! That is exactly what I’m trying to set up : a generic interactable actor that can be inherited from. The problem I’m having specifically is that events (such as cursor over) are tied to 1 or several components of the actor ; not to the actor itself.
Would you have any idea on how to set that up ?

[ClockworkOcean]

I will come back a bit later, not at a machine rn…

[ClockworkOcean]

Make an empty actor blueprint, and put this code in it

Then, you can create a child from this

Put some meshes in it, and, voila

If you want to try this behavior on one of your other blueprints, just reparent it

[siska]

Thanks ! I will read your explanation more carefully tomorrow morning & try it out. I’m too tired to think now

[siska]

I was looking at a bottom up approach using SceneComponent BPs, but your approach works perfectly. Thank you !