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package com.mapbox.mapboxsdk.maps;
import android.content.Context;
import android.support.v4.content.ContextCompat;
import android.support.v4.view.ViewCompat;
import android.support.v4.view.ViewPropertyAnimatorCompat;
import android.support.v4.view.ViewPropertyAnimatorListenerAdapter;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import com.mapbox.mapboxsdk.R;
import java.lang.ref.WeakReference;
import java.util.Timer;
import java.util.TimerTask;
/**
* CompassView is a UI element overlaid on a map that shows 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.
*/
public class CompassView extends ImageView {
private Timer mNorthTimer;
private double mDirection = 0.0f;
private ViewPropertyAnimatorCompat mFadeAnimator;
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) {
// View configuration
setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.compass));
setContentDescription(getResources().getString(R.string.compassContentDescription));
setEnabled(false);
// Layout params
float mScreenDensity = context.getResources().getDisplayMetrics().density;
ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams((int) (48 * mScreenDensity), (int) (48 * mScreenDensity));
setLayoutParams(lp);
}
@Override
public void setEnabled(boolean enabled) {
super.setEnabled(enabled);
if (enabled) {
if (mDirection != 0.0) {
if (mNorthTimer != null){
mNorthTimer.cancel();
mNorthTimer = null;
}
if (mFadeAnimator != null) {
mFadeAnimator.cancel();
}
mFadeAnimator = null;
setAlpha(1.0f);
setVisibility(View.VISIBLE);
}
} else {
if (mNorthTimer != null){
mNorthTimer.cancel();
mNorthTimer = null;
}
if (mFadeAnimator != null) {
mFadeAnimator.cancel();
}
mFadeAnimator = null;
setVisibility(View.INVISIBLE);
}
}
public void update(double direction) {
mDirection = direction;
setRotation((float) direction);
if (!isEnabled()) {
return;
}
if (direction == 0.0) {
if (getVisibility() == View.INVISIBLE) {
return;
}
if (mNorthTimer == null) {
if (mFadeAnimator != null) {
mFadeAnimator.cancel();
}
mFadeAnimator = null;
mNorthTimer = new Timer("CompassView North timer");
mNorthTimer.schedule(new TimerTask() {
@Override
public void run() {
post(new Runnable() {
@Override
public void run() {
setAlpha(1.0f);
mFadeAnimator = ViewCompat.animate(CompassView.this).alpha(0.0f).setDuration(1000).withLayer();
mFadeAnimator.setListener(new ViewPropertyAnimatorListenerAdapter() {
@Override
public void onAnimationEnd(View view) {
setVisibility(View.INVISIBLE);
mNorthTimer = null;
}
});
}
});
}
}, 1000);
}
} else {
if (mNorthTimer != null){
mNorthTimer.cancel();
mNorthTimer = null;
}
if (mFadeAnimator != null) {
mFadeAnimator.cancel();
}
setAlpha(1.0f);
setVisibility(View.VISIBLE);
}
}
public static class CompassClickListener implements View.OnClickListener {
private WeakReference<MapView> mMapView;
public CompassClickListener(final MapView mapView) {
mMapView = new WeakReference<>(mapView);
}
@Override
public void onClick(View v) {
final MapView mapView = mMapView.get();
if (mapView != null) {
mapView.resetNorth();
}
}
}
}
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