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package com.mapbox.mapboxsdk.maps.widgets;
import android.content.Context;
import android.graphics.PointF;
import android.graphics.drawable.Drawable;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.view.ViewCompat;
import android.support.v4.view.ViewPropertyAnimatorCompat;
import android.support.v4.view.ViewPropertyAnimatorListenerAdapter;
import android.support.v7.widget.AppCompatImageView;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import com.mapbox.mapboxsdk.maps.FocalPointChangeListener;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import java.lang.ref.WeakReference;
/**
* UI element overlaid on a map to show the map's bearing when it isn't true north (0.0). Tapping
* the compass resets the bearing to true north and hides the compass.
* <p>
* You can change the behaviour of this View during initialisation with
* {@link com.mapbox.mapboxsdk.maps.MapboxMapOptions}, and xml attributes. While running you can
* use {@link com.mapbox.mapboxsdk.maps.UiSettings}.
* </p>
*/
public final class CompassView extends AppCompatImageView implements Runnable, FocalPointChangeListener {
private static final long TIME_WAIT_IDLE = 500;
private static final long TIME_FADE_ANIMATION = TIME_WAIT_IDLE;
private static final long TIME_MAP_NORTH_ANIMATION = 150;
private float rotation = 0.0f;
private boolean fadeCompassViewFacingNorth = true;
private ViewPropertyAnimatorCompat fadeAnimator;
private PointF focalPoint;
public CompassView(Context context) {
super(context);
initialize(context);
}
public CompassView(Context context, AttributeSet attrs) {
super(context, attrs);
initialize(context);
}
public CompassView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initialize(context);
}
private void initialize(Context context) {
setEnabled(false);
// Layout params
float screenDensity = context.getResources().getDisplayMetrics().density;
ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams((int) (48 * screenDensity), (int) (48 * screenDensity));
setLayoutParams(lp);
}
// TODO refactor MapboxMap and replace with interface
public void setMapboxMap(@NonNull MapboxMap mapboxMap) {
setOnClickListener(new CompassClickListener(mapboxMap, this));
}
private void resetAnimation() {
if (fadeAnimator != null) {
fadeAnimator.cancel();
}
fadeAnimator = null;
}
public boolean isHidden() {
return fadeCompassViewFacingNorth && isFacingNorth();
}
public boolean isFacingNorth() {
// increase range of facing north to more than only 0.0
return Math.abs(rotation) >= 359.0 || Math.abs(rotation) <= 1.0;
}
@Override
public void setEnabled(boolean enabled) {
super.setEnabled(enabled);
if (enabled && !isHidden()) {
resetAnimation();
setAlpha(1.0f);
setVisibility(View.VISIBLE);
} else {
resetAnimation();
setAlpha(0.0f);
setVisibility(View.INVISIBLE);
}
}
@Nullable
PointF getFocalPoint() {
return focalPoint;
}
/**
* Updates the direction of the compass.
*
* @param bearing the direction value of the map
*/
public void update(final double bearing) {
rotation = (float) bearing;
if (!isEnabled()) {
return;
}
if (isHidden()) {
if (getVisibility() == View.INVISIBLE || fadeAnimator != null) {
return;
}
postDelayed(this, TIME_WAIT_IDLE);
return;
} else {
resetAnimation();
setAlpha(1.0f);
setVisibility(View.VISIBLE);
}
setRotation(rotation);
}
public void fadeCompassViewFacingNorth(boolean compassFadeFacingNorth) {
fadeCompassViewFacingNorth = compassFadeFacingNorth;
}
public boolean isFadeCompassViewFacingNorth() {
return fadeCompassViewFacingNorth;
}
/**
* Set the CompassView image.
*
* @param compass the drawable to use as compass image
*/
public void setCompassImage(Drawable compass) {
setImageDrawable(compass);
}
/**
* Get the current configured CompassView image.
*
* @return the drawable used as compass image
*/
public Drawable getCompassImage() {
return getDrawable();
}
@Override
public void run() {
if (isFacingNorth() && fadeCompassViewFacingNorth) {
resetAnimation();
setLayerType(View.LAYER_TYPE_HARDWARE, null);
fadeAnimator = ViewCompat.animate(CompassView.this).alpha(0.0f).setDuration(TIME_FADE_ANIMATION);
fadeAnimator.setListener(new ViewPropertyAnimatorListenerAdapter() {
@Override
public void onAnimationEnd(View view) {
setLayerType(LAYER_TYPE_NONE, null);
setVisibility(View.INVISIBLE);
resetAnimation();
}
});
}
}
@Override
public void onFocalPointChanged(PointF pointF) {
focalPoint = pointF;
}
static class CompassClickListener implements View.OnClickListener {
private WeakReference<MapboxMap> mapboxMap;
private WeakReference<CompassView> compassView;
CompassClickListener(final MapboxMap mapboxMap, CompassView compassView) {
this.mapboxMap = new WeakReference<>(mapboxMap);
this.compassView = new WeakReference<>(compassView);
}
@Override
public void onClick(View view) {
final MapboxMap mapboxMap = this.mapboxMap.get();
final CompassView compassView = this.compassView.get();
if (mapboxMap != null && compassView != null) {
PointF focalPoint = compassView.getFocalPoint();
if (focalPoint != null) {
mapboxMap.setFocalBearing(0, focalPoint.x, focalPoint.y, TIME_MAP_NORTH_ANIMATION);
} else {
mapboxMap.setFocalBearing(0, mapboxMap.getWidth() / 2, mapboxMap.getHeight() / 2, TIME_MAP_NORTH_ANIMATION);
}
compassView.postDelayed(compassView, TIME_WAIT_IDLE + TIME_MAP_NORTH_ANIMATION);
}
}
}
}
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