Add replace shortcut to convert built-in Scroll Rect to Pinchable one

README.md

@@ -11,6 +11,9 @@ Pinchable ScrollRect allows users to zoom in and out on the ScrollRect with both
 
 ## Getting Started
 * Use it same as the way you use the Unity ScrollRect component.
+* Add a UI/ScrollView from the GameObject Menu
+* Select the ScrollRect added, click on the context dropdown menu
+* Select "Replace as Pinchable"
 
 ## Important Remarks
 * PinchInputDetector component must have a higher execution order than PinchableScrollRect component or any IPinchHandler component in order to consume the original OnDrag pointer event beforehand.

README_ZH.md

@@ -11,6 +11,9 @@
 
 ## 入門
 * 使用方式與Unity 滾動矩形(ScrollRect) 的方式相同。
+* 從 GameObject 選單中創建 UI/ScrollView
+* 選擇新創建的的 ScrollRect，點擊其右上選單
+* 點選 "Replace as Pinchable"
 
 ## 備注
 * PinchInputDetector 組件必須具有比 PinchableScrollRect 組件或任何 IPinchHandler 組件更高的執行順序，以先消耗OnDrag 指針事件。

Runtime/PinchInputDetector.cs

@@ -2,19 +2,19 @@
 	[DisallowMultipleComponent]
 	public class PinchInputDetector : UIBehaviour, IDragHandler, IBeginDragHandler, IEndDragHandler {
 		/* Calling Order: OnBeginDrag -> OnDrag -> OnEndDrag */
-		
+
 		private IPinchStartHandler[] pinchStartHandlers;
 		private IPinchEndHandler[] pinchEndHandlers;
 		private IPinchZoomHandler[] pinchZoomHandlers;
-		
+
 		private int touchCount = 0;
 		private bool pinching = false;
 
 		private PointerEventData firstPointer;
 		private PointerEventData secondPointer;
 		private float previousDistance = 0f;
 		private float delta = 0f;
-		
+
 		protected override void Awake() {
 			base.Awake();
 			pinchStartHandlers = GetComponents<IPinchStartHandler>();
@@ -43,7 +43,7 @@ protected virtual void RegisterPointer(PointerEventData eventData) {
 		// Similar behaviour as OnPointerUp but we are using OnEndDrag to avoid compication
 		protected virtual void UnregisterPointer(PointerEventData eventData) {
 			touchCount--;
-			if(touchCount < 0) Debug.LogError("PinchInputDetector - Touch Count Mismatch");
+			if (touchCount < 0) Debug.LogError("PinchInputDetector - Touch Count Mismatch");
 			if (IsEqualPointer(firstPointer, eventData)) {
 				// first touch removed
 				if (pinching) {
@@ -67,7 +67,7 @@ protected virtual void UnregisterPointer(PointerEventData eventData) {
 				secondPointer = null;
 			}
 		}
-		
+
 		public virtual void OnBeginDrag(PointerEventData eventData) {
 			RegisterPointer(eventData);
 			if (touchCount == 1) return; // default behaviour
@@ -94,15 +94,15 @@ public virtual void OnDrag(PointerEventData eventData) {
 			if (IsEqualPointer(firstPointer, eventData)) {
 				// first touch dragging
 				firstPointer = eventData;
-				if(secondPointer != null) CalculateDistanceDelta();
+				if (secondPointer != null) CalculateDistanceDelta();
 				if (pinching) {
 					eventData.Use();
 					FireOnPinchZoom(new PinchEventData(firstPointer, secondPointer, delta));
 				}
 			} else if (IsEqualPointer(secondPointer, eventData)) {
 				// second touch dragging
 				secondPointer = eventData;
-				if(firstPointer != null) CalculateDistanceDelta();
+				if (firstPointer != null) CalculateDistanceDelta();
 				if (pinching) {
 					eventData.Use();
 					FireOnPinchZoom(new PinchEventData(secondPointer, firstPointer, delta));
@@ -118,7 +118,7 @@ private bool IsEqualPointer(PointerEventData a, PointerEventData b) {
 			if (b == null) return false;
 			return a.pointerId == b.pointerId;
 		}
-		
+
 		protected virtual void CalculateDistanceDelta() {
 			float newDistance = Vector2.Distance(firstPointer.position, secondPointer.position);
 			delta = newDistance - previousDistance;
@@ -131,14 +131,14 @@ protected virtual void FireOnPinchStart(PinchEventData data) {
 				pinchStartHandlers[i].OnPinchStart(data);
 			}
 		}
-		
+
 		protected virtual void FireOnPinchEnd(PinchEventData data) {
 			if (pinchEndHandlers == null) return;
 			for (int i = 0; i < pinchEndHandlers.Length; i++) {
 				pinchEndHandlers[i].OnPinchEnd(data);
 			}
 		}
-		
+
 		protected virtual void FireOnPinchZoom(PinchEventData data) {
 			if (pinchZoomHandlers == null) return;
 			for (int i = 0; i < pinchZoomHandlers.Length; i++) {