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package com.mapbox.mapboxsdk.location;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.TypeEvaluator;
import android.animation.ValueAnimator;
import androidx.annotation.IntDef;
import androidx.annotation.NonNull;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
/**
* Abstract class for all of the location component animators.
*
* @param <K> Data type that will be animated.
*/
abstract class MapboxAnimator<K> extends ValueAnimator implements ValueAnimator.AnimatorUpdateListener {
@Retention(RetentionPolicy.SOURCE)
@IntDef( {
ANIMATOR_LAYER_LATLNG,
ANIMATOR_CAMERA_LATLNG,
ANIMATOR_LAYER_GPS_BEARING,
ANIMATOR_LAYER_COMPASS_BEARING,
ANIMATOR_CAMERA_GPS_BEARING,
ANIMATOR_CAMERA_COMPASS_BEARING,
ANIMATOR_LAYER_ACCURACY,
ANIMATOR_ZOOM,
ANIMATOR_TILT
})
@interface Type {
}
static final int ANIMATOR_LAYER_LATLNG = 0;
static final int ANIMATOR_CAMERA_LATLNG = 1;
static final int ANIMATOR_LAYER_GPS_BEARING = 2;
static final int ANIMATOR_LAYER_COMPASS_BEARING = 3;
static final int ANIMATOR_CAMERA_GPS_BEARING = 4;
static final int ANIMATOR_CAMERA_COMPASS_BEARING = 5;
static final int ANIMATOR_LAYER_ACCURACY = 6;
static final int ANIMATOR_ZOOM = 7;
static final int ANIMATOR_TILT = 8;
private final AnimationsValueChangeListener<K> updateListener;
private final K target;
private K animatedValue;
private final double minUpdateInterval;
private long timeElapsed;
MapboxAnimator(@NonNull K previous, @NonNull K target, @NonNull AnimationsValueChangeListener<K> updateListener,
int maxAnimationFps) {
minUpdateInterval = 1E9 / maxAnimationFps;
setObjectValues(previous, target);
setEvaluator(provideEvaluator());
this.updateListener = updateListener;
this.target = target;
addUpdateListener(this);
addListener(new AnimatorListener());
}
@Override
public void onAnimationUpdate(ValueAnimator animation) {
animatedValue = (K) animation.getAnimatedValue();
long currentTime = System.nanoTime();
if ((currentTime - timeElapsed) < minUpdateInterval) {
return;
}
postUpdates();
timeElapsed = currentTime;
}
private class AnimatorListener extends AnimatorListenerAdapter {
@Override
public void onAnimationEnd(Animator animation) {
postUpdates();
}
}
private void postUpdates() {
updateListener.onNewAnimationValue(animatedValue);
}
K getTarget() {
return target;
}
abstract TypeEvaluator provideEvaluator();
interface AnimationsValueChangeListener<K> {
void onNewAnimationValue(K value);
}
}
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