com.mapbox.mapboxsdk.camera.CameraPosition Maven / Gradle / Ivy
package com.mapbox.mapboxsdk.camera;
import android.content.res.TypedArray;
import android.os.Parcel;
import android.os.Parcelable;
import com.mapbox.mapboxsdk.R;
import com.mapbox.mapboxsdk.constants.MapboxConstants;
import com.mapbox.mapboxsdk.geometry.LatLng;
import com.mapbox.mapboxsdk.utils.MathUtils;
import static com.mapbox.mapboxsdk.utils.MathUtils.convertNativeBearing;
/**
* Resembles the position, angle, zoom and tilt of the user's viewpoint.
*/
public final class CameraPosition implements Parcelable {
public static final Parcelable.Creator CREATOR
= new Parcelable.Creator() {
public CameraPosition createFromParcel(Parcel in) {
double bearing = in.readDouble();
LatLng target = in.readParcelable(LatLng.class.getClassLoader());
double tilt = in.readDouble();
double zoom = in.readDouble();
return new CameraPosition(target, zoom, tilt, bearing);
}
public CameraPosition[] newArray(int size) {
return new CameraPosition[size];
}
};
/**
* Direction that the camera is pointing in, in degrees clockwise from north.
*/
public final double bearing;
/**
* The location that the camera is pointing at.
*/
public final LatLng target;
/**
* The angle, in degrees, of the camera angle from the nadir (directly facing the Earth).
* See tilt(float) for details of restrictions on the range of values.
*/
public final double tilt;
/**
* Zoom level near the center of the screen. See zoom(float) for the definition of the camera's
* zoom level.
*/
public final double zoom;
/**
* Constructs a CameraPosition.
*
* @param target The target location to align with the center of the screen.
* @param zoom Zoom level at target. See zoom(float) for details of restrictions.
* @param tilt The camera angle, in degrees, from the nadir (directly down). See tilt(float)
* for details of restrictions.
* @param bearing Direction that the camera is pointing in, in degrees clockwise from north.
* This value will be normalized to be within 0 degrees inclusive and 360 degrees
* exclusive.
* @throws NullPointerException if target is null
* @throws IllegalArgumentException if tilt is outside the range of 0 to 90 degrees inclusive.
*/
CameraPosition(LatLng target, double zoom, double tilt, double bearing) {
this.target = target;
this.bearing = bearing;
this.tilt = tilt;
this.zoom = zoom;
}
/**
* Describe the kinds of special objects contained in this Parcelable's
* marshalled representation.
*
* @return integer 0.
*/
@Override
public int describeContents() {
return 0;
}
/**
* Flatten this object in to a Parcel.
*
* @param out The Parcel in which the object should be written.
* @param flags Additional flags about how the object should be written. May be 0 or
* {@link #PARCELABLE_WRITE_RETURN_VALUE}.
*/
@Override
public void writeToParcel(Parcel out, int flags) {
out.writeDouble(bearing);
out.writeParcelable(target, flags);
out.writeDouble(tilt);
out.writeDouble(zoom);
}
/**
* Returns a String with the camera target, zoom, bearing and tilt.
*
* @return A String with CameraPosition information.
*/
@Override
public String toString() {
return "Target: " + target + ", Zoom:" + zoom + ", Bearing:" + bearing + ", Tilt:" + tilt;
}
/**
* Compares this {@link CameraPosition} object with another {@link CameraPosition} and
* determines if their target, zoom, tilt, and bearing match.
*
* @param o Another {@link CameraPosition} to compare with this object.
* @return True if target, zoom, tilt, and bearing match this {@link CameraPosition} object.
* Else, false.
*/
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
CameraPosition cameraPosition = (CameraPosition) o;
if (target != null && !target.equals(cameraPosition.target)) {
return false;
} else if (zoom != cameraPosition.zoom) {
return false;
} else if (tilt != cameraPosition.tilt) {
return false;
} else if (bearing != cameraPosition.bearing) {
return false;
}
return true;
}
/**
* Gives an integer which can be used as the bucket number for storing elements of the set/map.
* This bucket number is the address of the element inside the set/map. There's no guarantee
* that this hash value will be consistent between different Java implementations, or even
* between different execution runs of the same program.
*
* @return integer value you can use for storing element.
*/
@Override
public int hashCode() {
int result = 1;
result = 31 * result + (target != null ? target.hashCode() : 0);
return result;
}
/**
* Builder for composing {@link CameraPosition} objects.
*/
public static final class Builder {
private double bearing = -1;
private LatLng target = null;
private double tilt = -1;
private double zoom = -1;
/**
* Creates an empty builder.
*/
public Builder() {
super();
}
/**
* Create Builder with an existing CameraPosition data.
*
* @param previous Existing CameraPosition values to use
*/
public Builder(CameraPosition previous) {
super();
if (previous != null) {
this.bearing = previous.bearing;
this.target = previous.target;
this.tilt = previous.tilt;
this.zoom = previous.zoom;
}
}
/**
* Create Builder with an existing CameraPosition data.
*
* @param typedArray TypedArray containgin attribute values
*/
public Builder(TypedArray typedArray) {
super();
if (typedArray != null) {
this.bearing = typedArray.getFloat(R.styleable.MapView_direction, 0.0f);
double lat = typedArray.getFloat(R.styleable.MapView_center_latitude, 0.0f);
double lng = typedArray.getFloat(R.styleable.MapView_center_longitude, 0.0f);
this.target = new LatLng(lat, lng);
this.tilt = typedArray.getFloat(R.styleable.MapView_tilt, 0.0f);
this.zoom = typedArray.getFloat(R.styleable.MapView_zoom, 0.0f);
}
}
/**
* Create Builder from an existing CameraPositionUpdate update.
*
* @param update Update containing camera options
*/
public Builder(CameraUpdateFactory.CameraPositionUpdate update) {
super();
if (update != null) {
bearing = update.getBearing();
target = update.getTarget();
tilt = update.getTilt();
zoom = update.getZoom();
}
}
/**
* Create Builder from an existing CameraPositionUpdate update.
*
* @param update Update containing camera options
*/
public Builder(CameraUpdateFactory.ZoomUpdate update) {
super();
if (update != null) {
this.zoom = update.getZoom();
}
}
/**
* Create Builder from an existing array of doubles.
*
* These values conform to map.ccp representation of a camera position.
*
*
* @param nativeCameraValues Values containing target, bearing, tilt and zoom
*/
public Builder(double[] nativeCameraValues) {
super();
if (nativeCameraValues != null && nativeCameraValues.length == 5) {
target(new LatLng(nativeCameraValues[0], nativeCameraValues[1]));
bearing(convertNativeBearing(nativeCameraValues[2]));
tilt(nativeCameraValues[3]);
zoom((float) nativeCameraValues[4]);
}
}
/**
* Sets the direction that the camera is pointing in, in degrees clockwise from north.
*
* @param bearing Bearing
* @return Builder
*/
public Builder bearing(double bearing) {
double direction = bearing;
while (direction >= 360) {
direction -= 360;
}
while (direction < 0) {
direction += 360;
}
this.bearing = direction;
return this;
}
/**
* Builds a CameraPosition.
*
* @return CameraPosition
*/
public CameraPosition build() {
return new CameraPosition(target, zoom, tilt, bearing);
}
/**
* Sets the location that the camera is pointing at.
*
* @param location Location
* @return Builder
*/
public Builder target(LatLng location) {
this.target = location;
return this;
}
/**
* Set the tilt in degrees
*
* value is clamped to 0 and 60.
*
*
* @param tilt Tilt value
* @return Builder
*/
public Builder tilt(double tilt) {
this.tilt = (float) MathUtils.clamp(tilt, MapboxConstants.MINIMUM_TILT, MapboxConstants.MAXIMUM_TILT);
return this;
}
/**
* Set the zoom
*
* @param zoom Zoom value
* @return Builder
*/
public Builder zoom(double zoom) {
this.zoom = zoom;
return this;
}
}
}
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