How to recreate the object loader circle button?

In the inspector, when there is an object field, to the right of it, is a little circular button. When you click the button it loads a window to find objects matching the type of that field.

What is that button called, and can I recreate it? Either that, or I could add my own button, but I still need to know how to load object selection window, filtered to an asset type, and get the selected value.

Background:
I have a special property type that I can save a value as a float directly, or as an asset that is storing a float. If it is the float directly, that object is the only one with that value. if I set the reference to the asset, then multiple objects can share the same value.

I already have a property drawer for it, which keeps that down to one field. If I drag an object over it, it switches the property layout to show an object field. If the value is set to none, it goes back to the local data value.

The problem is that when it is showing the float value directly, there is no round object button. The only way to set it, is through dragging an existing asset on to it. I want that button to be there normally.

- Thanks.

 

Found step 1: It seems to be called "Object Picker Button" - which lead to "EditorGUIUtility.ShowObjectPicker" - This allows me to create a custom access method for it. even if there isn't an easy way to just add the Object Picker button.

 

The style for the object picker with the field:

Code (CSharp):

1. (GUIStyle)"ObjectField"

Just the icon:

Code (CSharp):

1. EditorGUIUtility.FindTexture( "IN ObjectField" )

Those all all icons I found:


Does this help you orare you already happy with your last solution?

 

Yes! this is helpful. Now I just need to figure out how to pop up the little finder window for particular asset types and I'm golden.

 

I think you can just get away with using this to pop it open from a call.

EditorGUIUtility.ShowObjectPicker

link

 

@Johannski I've got everything working, except the icon part. I could not get the texture from that.

Code (CSharp):

1. EditorGUIUtility.FindTexture("ObjectField"); // also "IN ObjectField"

always returns null. Is there something I'm missing?

(side note, I downloaded the script to see all the internal textures, and was able to pull up the same results, it just seems like I need some additional line, like setting a style. )

 

Got it, its not a texture I grab, but the style itself applied to a button:

Code (CSharp):

1. GUI.Button(dragRect, "", GUI.skin.GetStyle("IN ObjectField"));

 

Ah very nice! I actually wouln't have guessed that. Good job

 

I needed this as well and after a good hour of scratching my head, I found a way easier method!

Code (CSharp):

1. Rect myRect = new Rect(position);
2. myRect.x += myRect.width - 20f;
3. myRect.width = 20f;
4.  
5. if(GUI.Button(myRect, "", GUIStyle.none))
6. {
7.     EditorGUIUtility.ShowObjectPicker();
8. }
9. EditorGUI.ObjectField(position, property, fieldInfo.FieldType);

By drawing the button before drawing the object field, the object picker button is blocked and won't be called. Combined with GUIStyle.none, you have a button that is in front of the object picker button, but 'shows' the object picker button. From there it's just adding your own code to your button and you're golden.