org.netbeans.swing.tabcontrol.plaf

Class EqualPolygon

java.lang.Object

java.awt.Polygon

org.netbeans.swing.tabcontrol.plaf.EqualPolygon

All Implemented Interfaces:

Shape, Serializable

public final class EqualPolygon
extends Polygon

A Polygon which implements a proper equals/hashcode contract. In order to optimize drag and drop repainting, it is necessary that the Shape objects returned by getTabIndication() be able to be compared properly.

To ease migration of older code, this class also implements a couple methods of GeneralPath, which was used before. These methods just delegate to addPoint(), so the full functionality of GeneralPath is not replicated (specifically, a polygon must be contiguous and closed).

See Also:

Serialized Form

Field Summary

Fields inherited from class java.awt.Polygon

bounds, npoints, xpoints, ypoints

Constructor Summary

Constructors

Constructor and Description
EqualPolygon() Creates a new instance of EqualGeneralPath
EqualPolygon(int[] x, int[] y) Non copy constructor based on fixed arrays.
EqualPolygon(int[] x, int[] y, int n) Copy constructor will copy the xpoints/ypoints arrays so the caller can later modify them without changing the polygon constructor here.
EqualPolygon(Polygon p) Copy constructor - takes either another EqualPolygon or a Polygon.
EqualPolygon(Rectangle r) Convenience constructor which takes a Rectangle

Method Summary

Modifier and Type	Method and Description
Object	clone() Creates a new EqualPolygon using the copy constructor - the resulting polygon may be modified without affecting the original.
boolean	equals(Object o) Returns true if the argument is a Polygon (does not need to be EqualPolygon) and its point arrays and number of points matches.
int	hashCode() Computes a hashCode based on the points arrays.
void	lineTo(int x, int y) Delegates to Polygon.addPoint().
void	moveTo(int x, int y) Delegates to Polygon.addPoint().
String	toString() Overridden to produce a meaningful result.

Methods inherited from class java.awt.Polygon

addPoint, contains, contains, contains, contains, contains, contains, getBoundingBox, getBounds, getBounds2D, getPathIterator, getPathIterator, inside, intersects, intersects, invalidate, reset, translate

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

EqualPolygon

public EqualPolygon()

Creates a new instance of EqualGeneralPath

EqualPolygon

public EqualPolygon(int[] x,
                    int[] y,
                    int n)

Copy constructor will copy the xpoints/ypoints arrays so the caller can later modify them without changing the polygon constructor here.

EqualPolygon

public EqualPolygon(Polygon p)

Copy constructor - takes either another EqualPolygon or a Polygon. Copies the points arrays of the original polygon, so the passed polygon may be modified without affecting the instance constructed here.

Parameters:

p -

EqualPolygon

public EqualPolygon(Rectangle r)

Convenience constructor which takes a Rectangle

EqualPolygon

public EqualPolygon(int[] x,
                    int[] y)

Non copy constructor based on fixed arrays. Takes the point count parameter fromx.length.

Method Detail

moveTo

public void moveTo(int x,
                   int y)

Delegates to Polygon.addPoint().

Parameters:

x - x coordinate

y - y coordinate

lineTo

public void lineTo(int x,
                   int y)

Delegates to Polygon.addPoint().

Parameters:

x - x coordinate

y - y coordinate

clone

public Object clone()

Creates a new EqualPolygon using the copy constructor - the resulting polygon may be modified without affecting the original.

Overrides:

clone in class Object

Returns:

A new instance of EqualPolygon with the same point values

toString

public String toString()

Overridden to produce a meaningful result.

Overrides:

toString in class Object

Returns:

A string representation of the EqualPolygon

hashCode

public int hashCode()

Computes a hashCode based on the points arrays.

Overrides:

hashCode in class Object

Returns:

The hash code

equals

public boolean equals(Object o)

Returns true if the argument is a Polygon (does not need to be EqualPolygon) and its point arrays and number of points matches.

Overrides:

equals in class Object

Parameters:

o - Another polygon

Returns:

whether or not they are equal