Package com.bric.multislider

Class ShapeBounds

java.lang.Object

com.bric.multislider.ShapeBounds

public class ShapeBounds
extends Object

This class features an efficient and accurate getBounds() method. The java.awt.Shape API clearly states that the Shape.getBounds2D() method may return a rectangle larger than the bounds of the actual shape, so here I present a method to get the bounds without resorting to the very-accurate-but-very-slow java.awt.geom.Area class.

Constructor Summary

Constructors

Constructor	Description
ShapeBounds()

Method Summary

Modifier and Type	Method	Description
static Rectangle2D	getBounds(PathIterator i)	This calculates the precise bounds of a shape.
static Rectangle2D	getBounds(PathIterator i, Rectangle2D r)	This calculates the precise bounds of a shape.
static Rectangle2D	getBounds(Shape shape)	This calculates the precise bounds of a shape.
static Rectangle2D	getBounds(Shape[] shapes)
static Rectangle2D	getBounds(Shape shape, AffineTransform transform)	This calculates the precise bounds of a shape.
static Rectangle2D	getBounds(Shape shape, AffineTransform transform, Rectangle2D r)	This calculates the precise bounds of a shape.
static Rectangle2D	getBounds(Shape shape, Rectangle2D r)	This calculates the precise bounds of a shape.

Methods inherited from class java.lang.Object

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

Constructor Details

ShapeBounds

public ShapeBounds()

Method Details

getBounds

public static Rectangle2D getBounds(Shape shape)
                             throws EmptyPathException

This calculates the precise bounds of a shape.

Parameters:

shape - the shape you want the bounds of. This method throws a NullPointerException if this is null.

Returns:

the bounds of shape.

Throws:

EmptyPathException - if the shape argument is empty.

getBounds

public static Rectangle2D getBounds(Shape[] shapes)

getBounds

public static Rectangle2D getBounds(Shape shape,
 AffineTransform transform)
                             throws EmptyPathException

This calculates the precise bounds of a shape.

Parameters:

shape - the shape you want the bounds of. This method throws a NullPointerException if this is null.

transform - if this is non-null, then this method returns the bounds of shape as seen through t.

Returns:

the bounds of shape, as seen through transform.

Throws:

EmptyPathException - if the shape argument is empty.

getBounds

public static Rectangle2D getBounds(Shape shape,
 AffineTransform transform,
 Rectangle2D r)
                             throws EmptyPathException

This calculates the precise bounds of a shape.

Parameters:

shape - the shape you want the bounds of. This method throws a NullPointerException if this is null.

transform - if this is non-null, then this method returns the bounds of shape as seen through t.

r - if this is non-null, then the result is stored in this rectangle. This is useful when you need to call this method repeatedly without allocating a lot of memory.

Returns:

the bounds of shape, as seen through transform.

Throws:

EmptyPathException - if the shape argument is empty.

getBounds

public static Rectangle2D getBounds(Shape shape,
 Rectangle2D r)
                             throws EmptyPathException

This calculates the precise bounds of a shape.

Parameters:

shape - the shape you want the bounds of. This method throws a NullPointerException if this is null.

r - if this is non-null, then the result is stored in this rectangle. This is useful when you need to call this method repeatedly without allocating a lot of memory.

Returns:

the bounds of shape.

Throws:

EmptyPathException - if the shape argument is empty.

getBounds

public static Rectangle2D getBounds(PathIterator i)

This calculates the precise bounds of a shape.

Parameters:

i - the shape you want the bounds of. This method throws a NullPointerException if this is null.

Returns:

the bounds of i.

getBounds

public static Rectangle2D getBounds(PathIterator i,
 Rectangle2D r)

This calculates the precise bounds of a shape.

Parameters:

i - the shape you want the bounds of. This method throws a NullPointerException if this is null.

r - if this is non-null, then the result is stored in this rectangle. This is useful when you need to call this method repeatedly without allocating a lot of memory.

Returns:

the bounds of i.