Custom HelpUrl Attribute

Unity Engine
1

Hey all,

i am struggeling to find out how the HelpURL attribute works.
I want to make my own class attributes that add those small buttons on the top right corner of a monobehaviour.
7009819--829201--upload_2021-4-6_10-9-31.png

For Example: We work with confluence and I want to make it easy to add confluence pages without the full url or even Jira Task links. At some point I would love to make ingame help tools that open when you click on the button. For that I need to make my own version of HelpURL.

Is that possible to do without coding my own custom editor?

Thanks for your help.

2

you don’t need an editor script.
put the HelpURL attribute above your class declaration:

[HelpURL("https://my-website.help")]
public class MyClass : MonoBehaviour
{
    // ...
}
3

No I want to make a custom attribute that has a similar functionality like HelpUL.

4

Ah, I see…
The HelpURLAttribute has an attribute by itself: UsedByNativeCodeAttribute.
I guess the attribute is handled by the native side of unity which probably also renders the headers of components in the inspector.
So, I guess it is not possible to extend this. But I am not sure.

Edit:
what you can extend is the context menu of that header (which appears when clicking the three dots):
Put this attribute on top of a static method (in editor assembly):
[MenuItem("CONTEXT/<MyComponentTypeName>/Do Something")]
(replace <MyComponentTypeName>)

Edit #2:
You could also try to create a custom decorator drawer and draw it in a rect with negative y-value. The downside is that you probably cannot put the attribute above the class but you have to put it as first statement inside the class…