TouchesHelper

```
public class TouchesHelper

                    
```
Class responsible for generating catalyst touch events based on android MotionEvent.

Field Summary

Fields
Modifier and Type	Field	Description
`public final static String`	`TARGET_SURFACE_KEY`
`public final static String`	`TARGET_KEY`
`public final static String`	`CHANGED_TOUCHES_KEY`
`public final static String`	`TOUCHES_KEY`

Method Summary

Modifier and Type	Method	Description
`static void`	`sendTouchesLegacy(RCTEventEmitter rctEventEmitter, TouchEvent touchEvent)`	Generate and send touch event to RCTEventEmitter JS module associated with the given {@param * context} for legacy renderer.
`static void`	`sendTouchEvent(RCTModernEventEmitter eventEmitter, TouchEvent event)`	Generate touch event data to match JS expectations.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - sendTouchesLegacy
```
 static void sendTouchesLegacy(RCTEventEmitter rctEventEmitter, TouchEvent touchEvent)
```
    Generate and send touch event to RCTEventEmitter JS module associated with the given {@param * context} for legacy renderer. Touch event can encode multiple concurrent touches (pointers).
    
    Parameters:
    
    rctEventEmitter - Event emitter used to execute JS module call
    
    touchEvent - native touch event to read pointers count and coordinates from
  - sendTouchEvent
```
 static void sendTouchEvent(RCTModernEventEmitter eventEmitter, TouchEvent event)
```
    Generate touch event data to match JS expectations. Combines logic in sendTouchEvent and FabricEventEmitter to create the same data structure in a more efficient manner.
    Touches have to be dispatched as separate events for each changed pointer to make JS processthem correctly. To avoid allocations, we preprocess touch events in Java world and then convertthem to native before dispatch.
    
    Parameters:
    
    eventEmitter - emitter to dispatch event to
    
    event - the touch event to extract data from