Additional information on mouseover in the inspector

Questions & Answers
1

Hey,

Some standard Unity scripts shows additional information when you mouseover the variable in the inspector. Does anyone know if there is a standard way of displaying this information on custom variables? (Both using public variables and/or Editor script)

See attached image on what i am trying to replicate.

Unity information box

5

As of Unity 4.5 or later just do this. The tooltip attribute is now built in.

public class SomeClass : MonoBehaviour
{
    [Tooltip("This is a great tooltip")]
    public int someVariable = 5;
}
3

GUIContent content = new GUIContent(“Text”, “Info Pop-up”);
int test = EditorGUILayout.IntField(content, test, GUILayout.Width(100f));

4

You can add tooltips easily with new Unity PropertyDrawers feature:

Assets/Scripts/TooltipAttribute.cs:

using UnityEngine;

public class TooltipAttribute : PropertyAttribute
{
    public readonly string text;

    public TooltipAttribute(string text)
    {
        this.text = text;
    }
}

Assets/Editor/TooltipDrawer.cs:

using UnityEditor;
using UnityEngine;

[CustomPropertyDrawer(typeof(TooltipAttribute))]
public class TooltipDrawer : PropertyDrawer
{
    public override void OnGUI(Rect position, SerializedProperty prop, GUIContent label)
    {
        var atr = (TooltipAttribute) attribute;
        var content = new GUIContent(label.text, atr.text);
        EditorGUI.PropertyField(position, prop, content);
    }
}

And use:

public class SomeClass : MonoBehaviour
{
    [Tooltip("This is a great tooltip")]
    public int someVariable = 5;
}
2

For that you would need to define a custom editor with a EditorGUILayout.PropertyField which is passed a GUIContent with the appropriate tooltip set.