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package com.mapbox.mapboxsdk.maps;
import android.support.annotation.Nullable;
import android.support.annotation.UiThread;
import com.mapbox.mapboxsdk.camera.CameraPosition;
import com.mapbox.mapboxsdk.camera.CameraUpdate;
import java.util.concurrent.TimeUnit;
import static com.mapbox.mapboxsdk.maps.MapView.REGION_DID_CHANGE_ANIMATED;
/**
* Resembles the current Map transformation.
* <p>
* Responsible for synchronising {@link CameraPosition} state and notifying {@link com.mapbox.mapboxsdk.maps.MapboxMap.OnCameraChangeListener}.
* </p>
*/
class Transform {
private NativeMapView mapView;
private MapboxMap mapboxMap;
private CameraPosition cameraPosition;
private MapboxMap.CancelableCallback cameraCancelableCallback;
private MapboxMap.OnCameraChangeListener onCameraChangeListener;
Transform(NativeMapView mapView, MapboxMap mapboxMap) {
this.mapView = mapView;
this.mapboxMap = mapboxMap;
}
//
// Camera API
//
@UiThread
public final CameraPosition getCameraPosition() {
if (cameraPosition == null) {
cameraPosition = invalidateCameraPosition();
}
return cameraPosition;
}
@UiThread
final void moveCamera(CameraUpdate update, MapboxMap.CancelableCallback callback) {
cameraPosition = update.getCameraPosition(mapboxMap);
mapboxMap.getTrackingSettings().resetTrackingModesIfRequired(cameraPosition);
cancelTransitions();
mapView.jumpTo(cameraPosition.bearing, cameraPosition.target, cameraPosition.tilt, cameraPosition.zoom);
// MapChange.REGION_DID_CHANGE_ANIMATED is not called for `jumpTo`
// invalidate camera position to provide OnCameraChange event.
mapboxMap.invalidateCameraPosition();
if (callback != null) {
callback.onFinish();
}
}
@UiThread
final void easeCamera(CameraUpdate update, int durationMs, boolean easingInterpolator, boolean resetTrackingMode, final MapboxMap.CancelableCallback callback) {
cameraPosition = update.getCameraPosition(mapboxMap);
if (resetTrackingMode) {
mapboxMap.getTrackingSettings().resetTrackingModesIfRequired(cameraPosition);
}
cancelTransitions();
if (callback != null) {
cameraCancelableCallback = callback;
mapView.addOnMapChangedListener(new MapView.OnMapChangedListener() {
@Override
public void onMapChanged(@MapView.MapChange int change) {
if (change == REGION_DID_CHANGE_ANIMATED && cameraCancelableCallback != null) {
cameraCancelableCallback.onFinish();
cameraCancelableCallback = null;
mapView.removeOnMapChangedListener(this);
}
}
});
}
mapView.easeTo(cameraPosition.bearing, cameraPosition.target, getDurationNano(durationMs), cameraPosition.tilt, cameraPosition.zoom, easingInterpolator);
}
@UiThread
final void animateCamera(CameraUpdate update, int durationMs, final MapboxMap.CancelableCallback callback) {
cameraPosition = update.getCameraPosition(mapboxMap);
mapboxMap.getTrackingSettings().resetTrackingModesIfRequired(cameraPosition);
cancelTransitions();
if (callback != null) {
cameraCancelableCallback = callback;
mapView.addOnMapChangedListener(new MapView.OnMapChangedListener() {
@Override
public void onMapChanged(@MapView.MapChange int change) {
if (change == REGION_DID_CHANGE_ANIMATED && cameraCancelableCallback != null) {
cameraCancelableCallback.onFinish();
cameraCancelableCallback = null;
mapView.removeOnMapChangedListener(this);
}
}
});
}
mapView.flyTo(cameraPosition.bearing, cameraPosition.target, getDurationNano(durationMs), cameraPosition.tilt, cameraPosition.zoom);
}
@UiThread
@Nullable
CameraPosition invalidateCameraPosition() {
CameraPosition cameraPosition = null;
if (mapView != null) {
cameraPosition = new CameraPosition.Builder(mapView.getCameraValues()).build();
this.cameraPosition = cameraPosition;
if (onCameraChangeListener != null) {
onCameraChangeListener.onCameraChange(this.cameraPosition);
}
}
return cameraPosition;
}
void cancelTransitions() {
if (cameraCancelableCallback != null) {
cameraCancelableCallback.onCancel();
cameraCancelableCallback = null;
}
mapView.cancelTransitions();
}
@UiThread
void resetNorth() {
cancelTransitions();
mapView.resetNorth();
}
void setOnCameraChangeListener(@Nullable MapboxMap.OnCameraChangeListener listener) {
this.onCameraChangeListener = listener;
}
private long getDurationNano(long durationMs) {
return durationMs > 0 ? TimeUnit.NANOSECONDS.convert(durationMs, TimeUnit.MILLISECONDS) : 0;
}
}
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