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Assets/Editor/com.unity.uiextensions/FancyScrollView/ScrollerEditor.cs

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+/// Credit setchi (https://github.com/setchi)
+/// Sourced from - https://github.com/setchi/FancyScrollView
+
+using UnityEditor;
+using UnityEditor.AnimatedValues;
+
+namespace UnityEngine.UI.Extensions
+{
+    [CustomEditor(typeof(Scroller))]
+    [CanEditMultipleObjects]
+    public class ScrollerEditor : Editor
+    {
+        SerializedProperty viewport;
+        SerializedProperty scrollDirection;
+        SerializedProperty movementType;
+        SerializedProperty elasticity;
+        SerializedProperty scrollSensitivity;
+        SerializedProperty inertia;
+        SerializedProperty decelerationRate;
+        SerializedProperty snap;
+        SerializedProperty draggable;
+        SerializedProperty scrollbar;
+
+        AnimBool showElasticity;
+        AnimBool showInertiaRelatedValues;
+
+        void OnEnable()
+        {
+            viewport = serializedObject.FindProperty("viewport");
+            scrollDirection = serializedObject.FindProperty("scrollDirection");
+            movementType = serializedObject.FindProperty("movementType");
+            elasticity = serializedObject.FindProperty("elasticity");
+            scrollSensitivity = serializedObject.FindProperty("scrollSensitivity");
+            inertia = serializedObject.FindProperty("inertia");
+            decelerationRate = serializedObject.FindProperty("decelerationRate");
+            snap = serializedObject.FindProperty("snap");
+            draggable = serializedObject.FindProperty("draggable");
+            scrollbar = serializedObject.FindProperty("scrollbar");
+
+            showElasticity = new AnimBool(Repaint);
+            showInertiaRelatedValues = new AnimBool(Repaint);
+            SetAnimBools(true);
+        }
+
+        void OnDisable()
+        {
+            showElasticity.valueChanged.RemoveListener(Repaint);
+            showInertiaRelatedValues.valueChanged.RemoveListener(Repaint);
+        }
+
+        void SetAnimBools(bool instant)
+        {
+            SetAnimBool(showElasticity, !movementType.hasMultipleDifferentValues && movementType.enumValueIndex == (int)MovementType.Elastic, instant);
+            SetAnimBool(showInertiaRelatedValues, !inertia.hasMultipleDifferentValues && inertia.boolValue, instant);
+        }
+
+        void SetAnimBool(AnimBool a, bool value, bool instant)
+        {
+            if (instant)
+            {
+                a.value = value;
+            }
+            else
+            {
+                a.target = value;
+            }
+        }
+
+        public override void OnInspectorGUI()
+        {
+            SetAnimBools(false);
+
+            serializedObject.Update();
+            EditorGUILayout.PropertyField(viewport);
+            EditorGUILayout.PropertyField(scrollDirection);
+            EditorGUILayout.PropertyField(movementType);
+            DrawMovementTypeRelatedValue();
+            EditorGUILayout.PropertyField(scrollSensitivity);
+            EditorGUILayout.PropertyField(inertia);
+            DrawInertiaRelatedValues();
+            EditorGUILayout.PropertyField(draggable);
+            EditorGUILayout.PropertyField(scrollbar);
+            serializedObject.ApplyModifiedProperties();
+        }
+
+        void DrawMovementTypeRelatedValue()
+        {
+            using (var group = new EditorGUILayout.FadeGroupScope(showElasticity.faded))
+            {
+                if (!group.visible)
+                {
+                    return;
+                }
+
+                using (new EditorGUI.IndentLevelScope())
+                {
+                    EditorGUILayout.PropertyField(elasticity);
+                }
+            }
+        }
+
+        void DrawInertiaRelatedValues()
+        {
+            using (var group = new EditorGUILayout.FadeGroupScope(showInertiaRelatedValues.faded))
+            {
+                if (!group.visible)
+                {
+                    return;
+                }
+
+                using (new EditorGUI.IndentLevelScope())
+                {
+                    EditorGUILayout.PropertyField(decelerationRate);
+                    EditorGUILayout.PropertyField(snap);
+                }
+            }
+        }
+    }
+}