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EqualPolygon (Tab Control) - NetBeans API Javadoc (Current Development Version)

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org.netbeans.swing.tabcontrol.plaf
Class EqualPolygon

java.lang.Object
  java.awt.Polygon
      org.netbeans.swing.tabcontrol.plaf.EqualPolygon

All Implemented Interfaces:

Shape, Serializable

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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

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Field Summary

 

Fields inherited from class java.awt.Polygon
bounds, npoints, xpoints, ypoints

 

Constructor Summary
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
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

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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.

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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 -

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EqualPolygon

public EqualPolygon(Rectangle r)

Convenience constructor which takes a Rectangle

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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

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lineTo

public void lineTo(int x,
                   int y)

Delegates to Polygon.addPoint().

Parameters:

x - x coordinate

y - y coordinate

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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

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toString

public String toString()

Overridden to produce a meaningful result.

Overrides:

toString in class Object

Returns:

A string representation of the EqualPolygon

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hashCode

public int hashCode()

Computes a hashCode based on the points arrays.

Overrides:

hashCode in class Object

Returns:

The hash code

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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

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