Created
May 3, 2017 17:41
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OnGestureEvent implimentations for use with GestureDetectorCompat. Makes it easer to use lambdas.
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| import android.view.GestureDetector; | |
| import android.view.MotionEvent; | |
| import com.fernandocejas.arrow.functions.Function; | |
| import com.fernandocejas.arrow.functions.Predicate; | |
| public class GestureDetectors { | |
| public static class OnDown implements GestureDetector.OnGestureListener { | |
| private final Predicate<MotionEvent> predicate; | |
| public OnDown(Predicate<MotionEvent> predicate) { | |
| this.predicate = predicate; | |
| } | |
| @Override | |
| public boolean onDown(MotionEvent e) { | |
| return predicate != null && predicate.apply(e); | |
| } | |
| @Override | |
| public void onShowPress(MotionEvent e) { | |
| } | |
| @Override | |
| public boolean onSingleTapUp(MotionEvent e) { | |
| return false; | |
| } | |
| @Override | |
| public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { | |
| return false; | |
| } | |
| @Override | |
| public void onLongPress(MotionEvent e) { | |
| } | |
| @Override | |
| public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { | |
| return false; | |
| } | |
| } | |
| public static class OnShowPress implements GestureDetector.OnGestureListener { | |
| private final Function<MotionEvent, Void> function; | |
| public OnShowPress(Function<MotionEvent, Void> function) { | |
| this.function = function; | |
| } | |
| @Override | |
| public boolean onDown(MotionEvent e) { | |
| return false; | |
| } | |
| @Override | |
| public void onShowPress(MotionEvent e) { | |
| function.apply(e); | |
| } | |
| @Override | |
| public boolean onSingleTapUp(MotionEvent e) { | |
| return false; | |
| } | |
| @Override | |
| public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { | |
| return false; | |
| } | |
| @Override | |
| public void onLongPress(MotionEvent e) { | |
| } | |
| @Override | |
| public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { | |
| return false; | |
| } | |
| } | |
| public static class OnSingleTapUp implements GestureDetector.OnGestureListener { | |
| private final Predicate<MotionEvent> predicate; | |
| public OnSingleTapUp(Predicate<MotionEvent> predicate) { | |
| this.predicate = predicate; | |
| } | |
| @Override | |
| public boolean onDown(MotionEvent e) { | |
| return false; | |
| } | |
| @Override | |
| public void onShowPress(MotionEvent e) { | |
| } | |
| @Override | |
| public boolean onSingleTapUp(MotionEvent e) { | |
| return predicate != null && predicate.apply(e); | |
| } | |
| @Override | |
| public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { | |
| return false; | |
| } | |
| @Override | |
| public void onLongPress(MotionEvent e) { | |
| } | |
| @Override | |
| public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { | |
| return false; | |
| } | |
| } | |
| public static class OnLongPress implements GestureDetector.OnGestureListener { | |
| private final Function<MotionEvent, Void> function; | |
| public OnLongPress(Function<MotionEvent, Void> function) { | |
| this.function = function; | |
| } | |
| @Override | |
| public boolean onDown(MotionEvent e) { | |
| return false; | |
| } | |
| @Override | |
| public void onShowPress(MotionEvent e) { | |
| } | |
| @Override | |
| public boolean onSingleTapUp(MotionEvent e) { | |
| return false; | |
| } | |
| @Override | |
| public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { | |
| return false; | |
| } | |
| @Override | |
| public void onLongPress(MotionEvent e) { | |
| function.apply(e); | |
| } | |
| @Override | |
| public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { | |
| return false; | |
| } | |
| } | |
| } |
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