UE4-21 UNDO in realtime

[Supremative]

The object is only used to store data. You can process this data anywhere.

[Supremative]

Here is one way how to implement it:

1. Create Blueprint Interface:
   

2. Add a request function to it:
   

   

3. Add to your controlling blueprint this interface:
   

4. Add the Source variable to the BP_ActionTransform and pass data to the Source using the blueprint interface function.
   

   

5. Set the Source variable when constructing the object.
   

   

6. Handle blueprint interface event:
   

   
   
   
   

[Supremative]

Also, It can be done more straightforwardly without a blueprint interface by passing data directly to the Source event. However, this method is less flexible.