Class Ellipse

java.lang.Object
  |
  +--java.awt.geom.RectangularShape
        |
        +--java.awt.geom.Ellipse2D
              |
              +--java.awt.geom.Ellipse2D.Double
                    |
                    +--Ellipse

class Ellipse

extends java.awt.geom.Ellipse2D.Double

implements GeometricObject

This class represents an Ellipse described by its upper_left, corner width and height of the encapsulating rectangle.

Inner classes inherited from class java.awt.geom.Ellipse2D

java.awt.geom.Ellipse2D.Double, java.awt.geom.Ellipse2D.Float

Field Summary

java.awt.Graphics	graphics Graphics context for this Geometric object.
private Polygon	points The original data points
long	time_stamp Time stamp of this object.

Fields inherited from class java.awt.geom.Ellipse2D.Double

height, width, x, y

Fields inherited from interface GeometricObject

CIRCLE, ELLIPSE, LINE, POINT, POLYGON, RECTANGLE, SQUARE

Constructor Summary

(package private)	Ellipse() The constructor.
(package private)	Ellipse(double x, double y, double width, double height) The constructor.
(package private)	Ellipse(Point upper_left, java.awt.Dimension d) The constructor.
(package private)	Ellipse(Point upper_left, int width, int height) The constructor.

Method Summary

boolean	containsGeometricObject(GeometricObject object) Returns false if the argument is not completely inside this object.
boolean	containsGeometricObjects(GeometricObject[] objects) Returns false if the objects in the input array are completely inside this object.
Polygon	getDataPoints() This method is used to get the original data points that forms this GeometricObject
Polygon	getPolygonalBounds() This method should return a polygon that corresponds to this object.
Rectangle	getRectangularBounds() Supplied for completeness.
long	getTimeStamp() Returns the time stamp of the current Terminal
java.lang.String	getType() Implement GeometricObject
java.lang.String	getTypeWithTolerance(double tolerance) This returns "circle" if the width/height ratio is within tolerance neighborhood of 1.
void	paint() Draw the object
void	paint(java.awt.Graphics g) Draw the object
void	paintOriginal(java.awt.Graphics g) This method is used to paint the original data points that forms this GeometricObject
boolean	pointIsOn(Point p, int radius) Returns true if the point is within +-radius distance from the curve defining the object.
boolean	pointIsOnOriginal(Point p, int radius) Returns true if the point is within +-radius distance from the original curve defining the object.
void	setDataPoints(Polygon points) This method is used to set the original data points that forms this GeometricObject
void	setGraphicsContext(java.awt.Graphics g) Set graphics context for this Geometric object.
void	setTimeStamp(long time_stamp) Sets the time stamp of the current Terminal
int	spatialRelation(GeometricObject object) This method should return the spatial relation of the input parameter with respect to this object.
java.lang.String	toString() Override toString
boolean	touches(GeometricObject object) This method should return true if the input objects touch.

Methods inherited from class java.awt.geom.Ellipse2D.Double

getBounds2D, getHeight, getWidth, getX, getY, isEmpty, setFrame

Methods inherited from class java.awt.geom.Ellipse2D

contains, contains, getPathIterator, intersects

Methods inherited from class java.awt.geom.RectangularShape

clone, contains, contains, getBounds, getCenterX, getCenterY, getFrame, getMaxX, getMaxY, getMinX, getMinY, getPathIterator, intersects, setFrame, setFrame, setFrameFromCenter, setFrameFromCenter, setFrameFromDiagonal, setFrameFromDiagonal

Methods inherited from class java.lang.Object

, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, wait, wait, wait

Field Detail

points

private Polygon points

The original data points

time_stamp

public long time_stamp

Time stamp of this object.

graphics

public java.awt.Graphics graphics

Graphics context for this Geometric object.

Constructor Detail

Ellipse

Ellipse()

The constructor.

Ellipse

Ellipse(double x,
        double y,
        double width,
        double height)

The constructor.

Ellipse

Ellipse(Point upper_left,
        int width,
        int height)

The constructor.

Ellipse

Ellipse(Point upper_left,
        java.awt.Dimension d)

The constructor.

Method Detail

getType

public java.lang.String getType()

Implement GeometricObject

getTypeWithTolerance

public java.lang.String getTypeWithTolerance(double tolerance)

This returns "circle" if the width/height ratio is within tolerance neighborhood of 1.

toString

public java.lang.String toString()

Override toString

Overrides:

toString in class java.lang.Object

paint

public void paint()

Draw the object

paint

public void paint(java.awt.Graphics g)

Draw the object

paintOriginal

public void paintOriginal(java.awt.Graphics g)

This method is used to paint the original data points that forms this GeometricObject

pointIsOn

public boolean pointIsOn(Point p,
                         int radius)

Returns true if the point is within +-radius distance from the curve defining the object. Returns false o/w.

Specified by:

pointIsOn in interface GeometricObject

pointIsOnOriginal

public boolean pointIsOnOriginal(Point p,
                                 int radius)

Returns true if the point is within +-radius distance from the original curve defining the object. Returns false o/w.

Specified by:

pointIsOnOriginal in interface GeometricObject

setGraphicsContext

public void setGraphicsContext(java.awt.Graphics g)

Set graphics context for this Geometric object. Must be set at least once before doing any drawing.

touches

public boolean touches(GeometricObject object)

This method should return true if the input objects touch. It should be optimized making use of the object type information.

Specified by:

touches in interface GeometricObject

getRectangularBounds

public Rectangle getRectangularBounds()

Supplied for completeness.

Specified by:

getRectangularBounds in interface GeometricObject

containsGeometricObject

public boolean containsGeometricObject(GeometricObject object)

Returns false if the argument is not completely inside this object. Return true O/W.

Specified by:

containsGeometricObject in interface GeometricObject

getPolygonalBounds

public Polygon getPolygonalBounds()

This method should return a polygon that corresponds to this object. The polygon is implicity closed and the last point doesn't necessarily have to be the same as the first (zeroth) point. The returned polygon is a liberal approximation to the real shape of the object. Known eksik: This should be refined to return a more conservative result.

Specified by:

getPolygonalBounds in interface GeometricObject

spatialRelation

public int spatialRelation(GeometricObject object)

This method should return the spatial relation of the input parameter with respect to this object. see the SpatialRelation class for a detailed list of possible spatial relations. Another version of this method should be implemented for handling spatial relations where a rotated coordinate system is to be used.

Specified by:

spatialRelation in interface GeometricObject

setTimeStamp

public void setTimeStamp(long time_stamp)

Sets the time stamp of the current Terminal

getTimeStamp

public long getTimeStamp()

Returns the time stamp of the current Terminal

setDataPoints

public void setDataPoints(Polygon points)

This method is used to set the original data points that forms this GeometricObject

Specified by:

setDataPoints in interface GeometricObject

getDataPoints

public Polygon getDataPoints()

This method is used to get the original data points that forms this GeometricObject

Specified by:

getDataPoints in interface GeometricObject

containsGeometricObjects

public boolean containsGeometricObjects(GeometricObject[] objects)

Returns false if the objects in the input array are completely inside this object. Return true O/W.

Specified by:

containsGeometricObjects in interface GeometricObject