feat(all): Add rotate event

android/titanium/src/java/org/appcelerator/titanium/TiC.java

@@ -157,6 +157,7 @@ public class TiC
 	public static final String EVENT_RESUME = "resume";
 	public static final String EVENT_RESUMED = "resumed";
 	public static final String EVENT_RETURN = "return";
+	public static final String EVENT_ROTATE = "rotate";
 	public static final String EVENT_ROWS_SELECTED = "rowsselected";
 	public static final String EVENT_SCROLL = "scroll";
 	public static final String EVENT_SCROLLEND = "scrollend";

android/titanium/src/java/org/appcelerator/titanium/view/TiUIView.java

@@ -1803,6 +1803,22 @@ public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float ve
 			int pointersDown = 0;
 			int touchSlop;
 
+			private void doRotationEvent(MotionEvent event)
+			{
+				// Calculate the angle between the two fingers
+				float deltaX = event.getX(0) - event.getX(1);
+				float deltaY = event.getY(0) - event.getY(1);
+				double radians = Math.atan(deltaY / deltaX);
+				double degrees = Math.toDegrees(radians);
+
+				if (event.getActionMasked() == MotionEvent.ACTION_MOVE) {
+					KrollDict data = new KrollDict();
+					data.put(TiC.PROPERTY_ROTATE, degrees);
+					data.put(TiC.EVENT_PROPERTY_SOURCE, proxy);
+					fireEvent(TiC.EVENT_ROTATE, data);
+				}
+			}
+
 			@Override
 			public boolean onTouch(View view, MotionEvent event)
 			{
@@ -1820,6 +1836,10 @@ public boolean onTouch(View view, MotionEvent event)
 					lastUpEvent.put(TiC.EVENT_PROPERTY_OBSCURED, wasObscured(event));
 				}
 
+				if (proxy != null && proxy.hierarchyHasListener(TiC.EVENT_ROTATE) && event.getPointerCount() == 2) {
+					doRotationEvent(event);
+				}
+
 				// Do custom "longpress" event tracking. Store motion event data to be used by onLongClick() listener.
 				// Note: Can't use GestureDetector for this since we would have to handle onDown() to make it work,
 				//       which would prevent view's onClick() and onLongClick() listeners from being called.

apidoc/Titanium/UI/View.yml

@@ -471,6 +471,18 @@ events:
         may result in an endless loop.
     since: "2.0.0"
 
+  - name: rotate
+    summary: Fired when the device detects a two finger rotation.
+    description: |
+        This event is fired when doing a two finger rotation and returning the angle.
+        The event occurs continuously until a finger is lifted again.
+    platforms: [android, iphone, ipad, macos]
+    properties:
+      - name: rotate
+        summary: Rotation in degrees.
+        type: Number
+    since: "12.3.0"
+
   - name: singletap
     summary: Fired when the device detects a single tap against the view.
     properties:

iphone/TitaniumKit/TitaniumKit/Sources/API/TiUIView.h

@@ -82,6 +82,7 @@ void ModifyScrollViewForKeyboardHeightAndContentHeightWithResponderRect(UIScroll
   UITapGestureRecognizer *doubleTapRecognizer;
   UITapGestureRecognizer *twoFingerTapRecognizer;
   UIPinchGestureRecognizer *pinchRecognizer;
+  UIRotationGestureRecognizer *rotationRegognizer;
   UISwipeGestureRecognizer *leftSwipeRecognizer;
   UISwipeGestureRecognizer *rightSwipeRecognizer;
   UISwipeGestureRecognizer *upSwipeRecognizer;
@@ -105,13 +106,13 @@ void ModifyScrollViewForKeyboardHeightAndContentHeightWithResponderRect(UIScroll
 - (BOOL)animating;
 
 /**
- Provides access to a proxy object of the view. 
+ Provides access to a proxy object of the view.
  */
 @property (nonatomic, readwrite, assign) TiProxy *proxy;
 
 /**
  Provides access to touch delegate of the view.
- 
+
  Touch delegate is the control that receives all touch events.
  */
 @property (nonatomic, readwrite, assign) UIView *touchDelegate;
@@ -137,6 +138,7 @@ void ModifyScrollViewForKeyboardHeightAndContentHeightWithResponderRect(UIScroll
 @property (nonatomic, readonly) UITapGestureRecognizer *doubleTapRecognizer;
 @property (nonatomic, readonly) UITapGestureRecognizer *twoFingerTapRecognizer;
 @property (nonatomic, readonly) UIPinchGestureRecognizer *pinchRecognizer;
+@property (nonatomic, readonly) UIRotationGestureRecognizer *rotationRegognizer;
 @property (nonatomic, readonly) UISwipeGestureRecognizer *leftSwipeRecognizer;
 @property (nonatomic, readonly) UISwipeGestureRecognizer *rightSwipeRecognizer;
 @property (nonatomic, readonly) UILongPressGestureRecognizer *longPressRecognizer;
@@ -242,7 +244,7 @@ void ModifyScrollViewForKeyboardHeightAndContentHeightWithResponderRect(UIScroll
 
 /**
  Returns default enablement for interactions.
- 
+
  Subclasses may override.
  @return _YES_ if the control has interactions enabled by default, _NO_ otherwise.
  */

iphone/TitaniumKit/TitaniumKit/Sources/API/TiUIView.m

@@ -181,6 +181,7 @@ - (void)dealloc
   [doubleTapRecognizer release];
   [twoFingerTapRecognizer release];
   [pinchRecognizer release];
+  [rotationRegognizer release];
   [leftSwipeRecognizer release];
   [rightSwipeRecognizer release];
   [upSwipeRecognizer release];
@@ -241,6 +242,9 @@ - (void)ensureGestureListeners
   if ([(TiViewProxy *)proxy _hasListeners:@"pinch"]) {
     [[self gestureRecognizerForEvent:@"pinch"] setEnabled:YES];
   }
+  if ([(TiViewProxy *)proxy _hasListeners:@"rotate"]) {
+    [[self gestureRecognizerForEvent:@"rotate"] setEnabled:YES];
+  }
   if ([(TiViewProxy *)proxy _hasListeners:@"longpress"]) {
     [[self gestureRecognizerForEvent:@"longpress"] setEnabled:YES];
   }
@@ -253,6 +257,7 @@ - (BOOL)proxyHasGestureListeners
       [proxy _hasListeners:@"twofingertap"] ||
       [proxy _hasListeners:@"swipe"] ||
       [proxy _hasListeners:@"pinch"] ||
+      [proxy _hasListeners:@"rotate"] ||
       [proxy _hasListeners:@"longpress"];
 }
 
@@ -1355,6 +1360,17 @@ - (UIPinchGestureRecognizer *)pinchRecognizer
   return pinchRecognizer;
 }
 
+- (UIRotationGestureRecognizer *)rotationRegognizer
+{
+  if (rotationRegognizer == nil) {
+    rotationRegognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(recognizedRotation:)];
+    [self configureGestureRecognizer:rotationRegognizer];
+    [self addGestureRecognizer:rotationRegognizer];
+  }
+  rotationRegognizer.delegate = self;
+  return rotationRegognizer;
+}
+
 - (UISwipeGestureRecognizer *)leftSwipeRecognizer
 {
   if (leftSwipeRecognizer == nil) {
@@ -1433,6 +1449,14 @@ - (void)recognizedTap:(UITapGestureRecognizer *)recognizer
   }
 }
 
+- (void)recognizedRotation:(UIRotationGestureRecognizer *)recognizer
+{
+  NSDictionary *event = [NSDictionary dictionaryWithObjectsAndKeys:
+                                          NUMDOUBLE(radiansToDegrees(recognizer.rotation)), @"rotate",
+                                      nil];
+  [self.proxy fireEvent:@"rotate" withObject:event];
+}
+
 - (void)recognizedPinch:(UIPinchGestureRecognizer *)recognizer
 {
   NSDictionary *event = [NSDictionary dictionaryWithObjectsAndKeys:
@@ -1686,6 +1710,9 @@ - (UIGestureRecognizer *)gestureRecognizerForEvent:(NSString *)event
   if ([event isEqualToString:@"pinch"]) {
     return [self pinchRecognizer];
   }
+  if ([event isEqualToString:@"rotate"]) {
+    return [self rotationRegognizer];
+  }
   if ([event isEqualToString:@"longpress"]) {
     return [self longPressRecognizer];
   }
@@ -1741,7 +1768,7 @@ - (void)sanitycheckListeners //TODO: This can be optimized and unwound later.
 {
   if (listenerArray == nil) {
     listenerArray = [[NSArray alloc] initWithObjects:@"singletap",
-                                     @"doubletap", @"twofingertap", @"swipe", @"pinch", @"longpress", nil];
+                                     @"doubletap", @"twofingertap", @"swipe", @"rotate", @"pinch", @"longpress", nil];
   }
   for (NSString *eventName in listenerArray) {
     if ([proxy _hasListeners:eventName]) {