how to declare a custom propertydrawer of a ClassName

Question

Hi Everyone,

I can create customPropertyDrawer attributes for a regular class, but I am not about the syntax for when the class is declaring generic type:

so if I have

 [Serializable]
 public class Owner<T> where T : Component{
  }

how can I create the related custom property drawer? the code below doesn't work...

 [CustomPropertyDrawer (typeof (Owner<T>))]
 public class PlayMakerPropertyDrawerBaseClass : PropertyDrawer {
  // and then I guess the following hurdle would be how to access T ?
 }

Thanks :)

Bye,

Jean

Answer 1

Best Answer

Answer by Adam-Mechtley · May 17, 2017 at 01:02 PM

You can't specify an open generic type as the type for the PropertyDrawer. It's up to you how you go about it, but I usually do something like this:

 public abstract class OwnerBase {}
 
 // made this abstract because Unity will only serialize if it's a concrete type anyway
 public abstract class Owner<T> : OwnerBase where T : Component {}
 
 // add Serializable to your concrete implementations
 [Serializable]
 public class TransformOwner : Owner<Transform>
 
 // specify the base type and that children should use the drawer
 [CustomPropertyDrawer(typeof(OwnerBase), true)]
 public class OwnerPropertyDrawer : PropertyDrawer {}

Add comment · Share

Answer 2

Answer by Jean-Fabre · May 17, 2017 at 01:05 PM

Hi,

I was worried I would not be able too.

neverMind I'll be using an attribute to define the type I need for the class, I need this for public variables inside components.

Thanks for your insight :)

Bye,

Jean

Add comment · Share

how to declare a custom propertydrawer of a ClassName

2 Replies

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions