package com.sparshui.common.messages.events;
import com.sparshui.common.Event;
import com.sparshui.common.Location;
import com.sparshui.common.utils.Converter;
public class ZoomEvent implements Event {
private static final long serialVersionUID = -4658011539863774168L;
private float _scale;
private Location _center;
private long _time;
public ZoomEvent() {
_scale = 1;
_center = new Location();
}
public ZoomEvent(float scale, Location center, long time) {
_scale = scale;
_center = center;
_time = time;
//System.out.println("ZoomEvent Constructed, Scale = " + _scale);
}
public float getScale() {
return _scale;
}
public long getTime() {
return _time;
}
public Location getCenter() {
return _center;
}
public void setCenter(Location center) {
_center = center;
}
public float getX() {
return _center.getX();
}
public float getY() {
return _center.getY();
}
/**
* Constructs a ZoomEvent from a serialized version of ZoomEvent.
* - 4 bytes : scale
* - 4 bytes : center - x coordinate
* - 4 bytes : center - y coordinate
* - 12 bytes total
*
*
* @param data
*/
public ZoomEvent(byte[] data) {
if (data.length < 12) {
// TODO add error handling
System.err.println("Error constructing Zoom Event.");
_scale = 1;
_center = new Location(0, 0);
} else {
_scale = Converter.byteArrayToFloat(data, 0);
_center = new Location(Converter.byteArrayToFloat(data, 4),
Converter.byteArrayToFloat(data, 8));
}
}
//@override
public int getEventType() {
return EventType.ZOOM_EVENT;
}
/**
* Constructs the data packet with this event data. Message format for this
* event:
* - 4 bytes : event type
* - 4 bytes : scale
* - 4 bytes : center - x coordinate
* - 4 bytes : center - y coordinate
* - 16 bytes total
* @return serialized data
*/
public byte[] serialize() {
byte[] data = new byte[16];
Converter.intToByteArray(data, 0, getEventType());
Converter.floatToByteArray(data, 4, _scale);
Converter.floatToByteArray(data, 8, _center.getX());
Converter.floatToByteArray(data, 12, _center.getY());
return data;
}
//@override
public String toString() {
return ("ZOOM Scale: " + _scale + ", Center: " + _center.toString());
}
}