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Assets/Packages/com.unity.uiextensions/Runtime/Scripts/Utilities/PPIViewer.cs

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+/// Credit FireOApache 
+/// sourced from: http://answers.unity3d.com/questions/1149417/ui-button-onclick-sensitivity-for-high-dpi-devices.html#answer-1197307
+
+/*USAGE:
+Simply place the script on A Text control in the scene to display the current PPI / DPI of the screen*/
+
+namespace UnityEngine.UI.Extensions
+{
+#if UNITY_2022_1_OR_NEWER
+    [RequireComponent(typeof(TMPro.TMP_Text))]
+#else
+    [RequireComponent(typeof(Text))]
+#endif
+    [AddComponentMenu("UI/Extensions/PPIViewer")]
+    public class PPIViewer : MonoBehaviour
+    {
+#if UNITY_2022_1_OR_NEWER
+        private TMPro.TMP_Text label;
+#else
+        private Text label;
+#endif
+
+        void Awake()
+        {
+#if UNITY_2022_1_OR_NEWER
+            label = GetComponentInChildren<TMPro.TMP_Text>();
+#else
+            label = GetComponentInChildren<Text>();
+#endif
+        }
+
+        void Start()
+        {
+            if (label != null)
+            {
+                label.text = "PPI: " + Screen.dpi.ToString();
+            }
+        }
+    }
+}