Adds sample.

README.md

@@ -5,16 +5,16 @@ Custom labels for the Unity Hierarchy window:
 ![Example image of hierarchy labels](Documentation~/HierarchyExample.png)
 
 - [Hierarchy Labels](#hierarchy-labels)
-  * [Features](#features)
-  * [How to use](#how-to-use)
-  * [Built-in rules](#built-in-rules)
-  * [Custom Rules](#custom-rules)
-    + [How to add your own rule](#how-to-add-your-own-rule)
-    + [How to make your rule configurable](#how-to-make-your-rule-configurable)
-    + [Add name and description for your rule](#add-name-and-description-for-your-rule)
-    + [Tips for adding custom rules](#tips-for-adding-custom-rules)
-  * [Known limitations](#known-limitations)
-  * [Future Plans](#future-plans)
+  - [Features](#features)
+  - [How to use](#how-to-use)
+  - [Built-in rules](#built-in-rules)
+  - [Custom Rules](#custom-rules)
+    - [How to add your own rule](#how-to-add-your-own-rule)
+    - [How to make your rule configurable](#how-to-make-your-rule-configurable)
+    - [Add name and description for your rule](#add-name-and-description-for-your-rule)
+    - [Tips for adding custom rules](#tips-for-adding-custom-rules)
+  - [Known limitations](#known-limitations)
+  - [Future Plans](#future-plans)
 
 ## Features
 

Samples~/CanvasWithoutRaycastHierarchyLabelRule.cs

@@ -0,0 +1,33 @@
+using System;
+using System.ComponentModel;
+using HierarchyLabels;
+using UnityEngine;
+using UnityEngine.UI;
+using Component = UnityEngine.Component;
+
+[Serializable,
+DisplayName("Missing Raycaster on Canvas"),
+Description("Shows a label if a Canvas is attached but no GraphicalRaycaster is present or it is disabled.")]
+public class CanvasWithoutRaycastHierarchyLabelRule : HierarchyLabelRule
+{
+    [SerializeField] private bool _includeDisabled;
+
+    public override bool GetLabel(Component component, out string label)
+    {
+        label = string.Empty;
+
+        if (component is Canvas && IsRaycastDisabledOrMissing(component))
+        {
+            label = "Missing GraphicRaycaster!";
+            return true;
+        }
+
+        return false;
+    }
+
+    private bool IsRaycastDisabledOrMissing(Component component)
+    {
+        return !component.GetComponent<GraphicRaycaster>() ||
+               _includeDisabled && !component.GetComponent<GraphicRaycaster>().enabled;
+    }
+}

package.json

@@ -4,5 +4,13 @@
     "description": "Rule based labels for the Unity Editor hierarchy window.",
     "author": "Ruben Ohnmacht",
     "license": "MIT",
-    "displayName": "Hierarchy Labels"
+    "displayName": "Hierarchy Labels",
+    "documentationUrl": "https://github.com/shniqq/hierarchy-labels#readme",
+    "samples": [
+        {
+            "displayName": "Custom Rule Example",
+            "description": "Contains rule to show a label if a Canvas is missing a GraphicalRaycaster as example on how to create a custom rule.",
+            "path": "Samples~/"
+        }
+    ]
 }