Page Summary
-
The
GesturePointersUtilityclass manages pointer IDs to ensure each pointer is used in only one gesture at a time. -
It provides methods for converting touch coordinates between pixels and inches (
inchesToPixels,pixelsToInches). -
You can check if a pointer ID is currently retained using
isPointerIdRetained. -
The
motionEventToPositionmethod converts a MotionEvent and pointer ID into a 3D position vector. -
Pointer IDs can be retained and released using
retainPointerIdandreleasePointerId, respectively.
public class GesturePointersUtility
Retains/Releases pointer Ids so that each pointer can only be used in one gesture at a time. Provides helper functions for converting touch coordinates between pixels and inches.
Public Constructors
Public Methods
| float | inchesToPixels
(float inches)
|
| boolean | isPointerIdRetained
(int pointerId)
|
| static Vector3 | |
| float | pixelsToInches
(float pixels)
|
| void | releasePointerId
(int pointerId)
|
| void | retainPointerId
(int pointerId)
|
Inherited Methods
Public Constructors
public GesturePointersUtility ( DisplayMetrics displayMetrics)
Parameters
displayMetrics
Public Methods
public float inchesToPixels (float inches)
Parameters
inches
public boolean isPointerIdRetained (int pointerId)
Parameters
pointerId
public static Vector3 motionEventToPosition ( MotionEvent me, int pointerId)
Parameters
| me |
|---|
| pointerId |
public float pixelsToInches (float pixels)
Parameters
pixels
public void releasePointerId (int pointerId)
Parameters
pointerId
public void retainPointerId (int pointerId)
Parameters
pointerId
