jdraw.graphicalobjects
Class Ellipse

java.lang.Object
  |
  +--jdraw.graphicalobjects.GraphicalObject
        |
        +--jdraw.graphicalobjects.SizedGraphicalObject
              |
              +--jdraw.graphicalobjects.Ellipse

public class Ellipse

extends SizedGraphicalObject

A graphical ellipse.

Field Summary

private static Cursor	CURSOR The mouse cursor for this object.
static String	FRIENDLYNAME The friendly name of objects of this class.
private int	iXRadius The X-axis radius of this ellipse.
private int	iYRadius The Y-axis radius of this ellipse.
private Point	ptCenter The center of this ellipse.

Fields inherited from class jdraw.graphicalobjects.SizedGraphicalObject

iHeight, iWidth

Fields inherited from class jdraw.graphicalobjects.GraphicalObject

bDragInProgress, colColor, iX, iY, lstPropertyChangeListeners, ptDragAndDropStartPosition, ptInitialObjectPosition, rectInitialBoundingBox

Constructor Summary

Ellipse(int iX, int iY, Color colColor, int iWidth, int iHeight)
Creates a new Ellipse with specified position, color, width and height.

Method Summary

Point	getCenter() Returns the center of this ellipse.
Cursor	getCursor() Returns the mouse cursor for this object.
int	getDistanceSq(Point ptPoint) Returns the square of the minimal distance between this ellipse and the specified point.
String	getFriendlyName() Returns the friendly name of this ellipse.
int	getXRadius() Returns the X-axis radius of this ellipse.
int	getYRadius() Returns the Y-axis radius of this ellipse.
void	paint(Graphics g) Paints this ellipse.
protected void	updateCachedData() Invoked when cached data have to be updated.
protected void	updateCenter() Updates the center of this ellipse.
protected void	updateRadii() Updates the radii of this ellipse.

Methods inherited from class jdraw.graphicalobjects.SizedGraphicalObject

getBoundingBox, getHeight, getPropertyDialog, getWidth, setHeight, setWidth

Methods inherited from class jdraw.graphicalobjects.GraphicalObject

addPropertyChangeListener, commitDragAndDrop, drag, fireBoudingBoxChange, getColor, getDistance, getDistanceSq, getDistanceSq, getX, getY, isDragInProgress, moveTo_silent, moveTo, openPropertyDialog, prepareBoudingBoxEvent, removePropertyChangeListener, rollbackDragAndDrop, setColor_silent, setColor, setX_silent, setX, setY_silent, setY, startDragAndDrop, suspendDragAndDrop

Methods inherited from class java.lang.Object

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

Field Detail

FRIENDLYNAME

public static final String FRIENDLYNAME

The friendly name of objects of this class.

CURSOR

private static final Cursor CURSOR

The mouse cursor for this object.

ptCenter

private final Point ptCenter

The center of this ellipse.

iXRadius

private int iXRadius

The X-axis radius of this ellipse.

iYRadius

private int iYRadius

The Y-axis radius of this ellipse.

Constructor Detail

Ellipse

public Ellipse(int iX,
               int iY,
               Color colColor,
               int iWidth,
               int iHeight)

Creates a new Ellipse with specified position, color, width and height.

Method Detail

getCursor

public Cursor getCursor()

Returns the mouse cursor for this object.

Overrides:

getCursor in class GraphicalObject

getFriendlyName

public String getFriendlyName()

Returns the friendly name of this ellipse.

Overrides:

getFriendlyName in class GraphicalObject

paint

public void paint(Graphics g)

Paints this ellipse.

Overrides:

paint in class GraphicalObject

getDistanceSq

public int getDistanceSq(Point ptPoint)

Returns the square of the minimal distance between this ellipse and the specified point. Actually, this methods does not return the minimal distance (which is not easily computable), but the distance between the specified point and the intersection between this point and the center of this ellipse. This was found to be a sufficient approximation.

Overrides:

getDistanceSq in class GraphicalObject

updateCachedData

protected void updateCachedData()

Invoked when cached data have to be updated.

Overrides:

updateCachedData in class GraphicalObject

getCenter

public Point getCenter()

Returns the center of this ellipse.

updateCenter

protected void updateCenter()

Updates the center of this ellipse.

getXRadius

public int getXRadius()

Returns the X-axis radius of this ellipse.

getYRadius

public int getYRadius()

Returns the Y-axis radius of this ellipse.

updateRadii

protected void updateRadii()

Updates the radii of this ellipse.