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/*
* SIP Communicator, the OpenSource Java VoIP and Instant Messaging client.
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package net.java.sip.communicator.service.protocol;
/**
* A point representing a location in {@code (x,y)} coordinate space,
* specified in integer precision.
* <p>
* This class has been inspired by the java.awt.Point class.
* <p>
* @author Julien Waechter
* @author Emil Ivov
*/
public class WhiteboardPoint implements Cloneable
{
/**
* The X coordinate of this WhiteboadPoint.
*/
private double x;
/**
* The Y coordinate of this <code>Point</code>.
*/
private double y;
/**
* Constructs and initializes a point with the same location as
* the specified <tt>Point</tt> object.
* @param p a point
*/
public WhiteboardPoint(WhiteboardPoint p)
{
this(p.x, p.y);
}
/**
* Constructs and initializes a point at the specified <tt>(x,y)</tt>
* location in the coordinate space.
*
* @param x the X coordinate of the newly constructed <code>Point</code>
* @param y the Y coordinate of the newly constructed <code>Point</code>
* @since 1.0
*/
public WhiteboardPoint(double x, double y)
{
this.x = x;
this.y = y;
}
/**
* Returns the X coordinate of this <tt>WhiteboardPoint</tt>.
*
* @return the x coordinate of this <tt>WhiteboardPoint</tt>.
*/
public double getX()
{
return x;
}
/**
* Returns the Y coordinate of this <tt>WhiteboardPoint</tt>.
*
* @return the y coordinate of this <tt>WhiteboardPoint</tt>.
*/
public double getY()
{
return y;
}
/**
* Sets a new value to the x coordinate.
*
* @param x the new value of the x coordinate
*/
public void setX(double x)
{
this.x = x;
}
/**
* Sets a new value to the y coordinate.
*
* @param y the new value of the y coordinate
*/
public void setY(double y)
{
this.y = y;
}
/**
* Determines whether or not two points are equal. Two instances of
* <tt>WhiteboardPoint</tt> are equal if the values of their
* <tt>x</tt> and <tt>y</tt> member fields, representing
* their position in the coordinate space, are the same.
*
* @param obj an object to be compared with this <tt>WhiteboardPoint</tt>
*
* @return <tt>true</tt> if the object to be compared is an instance of
* <tt>WhiteboardPoint</tt> and has the same values; <tt>false</tt>
* otherwise.
*/
public boolean equals(Object obj)
{
if (obj instanceof WhiteboardPoint)
{
WhiteboardPoint pt = (WhiteboardPoint)obj;
return (x == pt.x) && (y == pt.y);
}
return false;
}
/**
* Returns a string representation of this point and its location
* in the {@code (x,y)} coordinate space. This method is intended to be
* used only for debugging purposes, and the content and format of the
* returned string may vary between implementations.
*
* The returned string may be empty but may not be <code>null</code>.
*
* @return a string representation of this point
*/
public String toString()
{
return getClass().getName() + "[x=" + x + ",y=" + y + "]";
}
/**
* Creates and returns a copy of this <tt>WhiteboardPoint</tt>.
*
* @return a clone of this <tt>WhiteboardPoint</tt> instance.
*/
protected Object clone()
{
return new WhiteboardPoint(this);
}
/**
* Calculates the distance from this point the given point.
*
* @param p the point to which to calculate the distance
* @return the distance between this point and the given point
*/
public double distance(WhiteboardPoint p)
{
double PX = p.getX() - this.getX();
double PY = p.getY() - this.getY();
return Math.sqrt(PX * PX + PY * PY);
}
}
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