org.jdesktop.swingx.geom
Class Morphing2D

java.lang.Object
  org.jdesktop.swingx.geom.Morphing2D

All Implemented Interfaces:

Shape

public class Morphing2D
extends Object
implements Shape

A morphing shape is a shape which geometry is constructed from two other shapes: a start shape and an end shape.

The morphing property of a morphing shape defines the amount of transformation applied to the start shape to turn it into the end shape.

Both shapes must have the same winding rule.

Constructor Summary

Morphing2D(Shape startShape, Shape endShape)
Creates a new morphing shape.

Method Summary

boolean	contains(double x, double y) Tests if the specified coordinates are inside the boundary of the Shape.
boolean	contains(double x, double y, double w, double h) Tests if the interior of the Shape entirely contains the specified rectangular area.
boolean	contains(Point2D p) Tests if a specified Point2D is inside the boundary of the Shape.
boolean	contains(Rectangle2D r) Tests if the interior of the Shape entirely contains the specified Rectangle2D.
Rectangle	getBounds() Returns an integer Rectangle that completely encloses the Shape.
Rectangle2D	getBounds2D() Returns a high precision and more accurate bounding box of the Shape than the getBounds method.
double	getMorphing() Returns the morphing value between the two shapes.
PathIterator	getPathIterator(AffineTransform at) Returns an iterator object that iterates along the Shape boundary and provides access to the geometry of the Shape outline.
PathIterator	getPathIterator(AffineTransform at, double flatness) Returns an iterator object that iterates along the Shape boundary and provides access to a flattened view of the Shape outline geometry.
boolean	intersects(double x, double y, double w, double h) Tests if the interior of the Shape intersects the interior of a specified rectangular area.
boolean	intersects(Rectangle2D r) Tests if the interior of the Shape intersects the interior of a specified Rectangle2D.
void	setMorphing(double morph) Sets the morphing value between the two shapes.

Methods inherited from class java.lang.Object

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

Constructor Detail

Morphing2D

public Morphing2D(Shape startShape,
                  Shape endShape)

Creates a new morphing shape. A morphing shape can be used to turn one shape into another one. The transformation can be controlled by the morph property.

Parameters:

startShape - the shape to morph from

endShape - the shape to morph to

Throws:

IllegalPathStateException - if the shapes do not have the same winding rule

See Also:

getMorphing(), setMorphing(double)

Method Detail

getMorphing

public double getMorphing()

Returns the morphing value between the two shapes.

Returns:

the morphing value between the two shapes

See Also:

setMorphing(double)

setMorphing

public void setMorphing(double morph)

Sets the morphing value between the two shapes. This value controls the transformation from the start shape to the end shape. A value of 0.0 is the start shape. A value of 1.0 is the end shape. A value of 0.5 is a new shape, morphed half way from the start shape to the end shape.

The specified value should be between 0.0 and 1.0. If not, the value is clamped in the appropriate range.

Parameters:

morph - the morphing value between the two shapes

See Also:

getMorphing()

getBounds

public Rectangle getBounds()

Returns an integer Rectangle that completely encloses the Shape. Note that there is no guarantee that the returned Rectangle is the smallest bounding box that encloses the Shape, only that the Shape lies entirely within the indicated Rectangle. The returned Rectangle might also fail to completely enclose the Shape if the Shape overflows the limited range of the integer data type. The getBounds2D method generally returns a tighter bounding box due to its greater flexibility in representation.

Specified by:

getBounds in interface Shape

Returns:

an integer Rectangle that completely encloses the Shape.

See Also:

Shape.getBounds2D()

getBounds2D

public Rectangle2D getBounds2D()

Returns a high precision and more accurate bounding box of the Shape than the getBounds method. Note that there is no guarantee that the returned Rectangle2D is the smallest bounding box that encloses the Shape, only that the Shape lies entirely within the indicated Rectangle2D. The bounding box returned by this method is usually tighter than that returned by the getBounds method and never fails due to overflow problems since the return value can be an instance of the Rectangle2D that uses double precision values to store the dimensions.

Specified by:

getBounds2D in interface Shape

Returns:

an instance of Rectangle2D that is a high-precision bounding box of the Shape.

See Also:

Shape.getBounds()

contains

public boolean contains(double x,
                        double y)

Tests if the specified coordinates are inside the boundary of the Shape.

Specified by:

contains in interface Shape

Parameters:

x - the specified x coordinate

y - the specified y coordinate

Returns:

true if the specified coordinates are inside the Shape boundary; false otherwise.

contains

public boolean contains(Point2D p)

Tests if a specified Point2D is inside the boundary of the Shape.

Specified by:

contains in interface Shape

Parameters:

p - a specified Point2D

Returns:

true if the specified Point2D is inside the boundary of the Shape; false otherwise.

intersects

public boolean intersects(double x,
                          double y,
                          double w,
                          double h)

Tests if the interior of the Shape intersects the interior of a specified rectangular area. The rectangular area is considered to intersect the Shape if any point is contained in both the interior of the Shape and the specified rectangular area.

This method might conservatively return true when:

• there is a high probability that the rectangular area and the Shape intersect, but
• the calculations to accurately determine this intersection are prohibitively expensive.

This means that this method might return true even though the rectangular area does not intersect the Shape. The Area class can be used to perform more accurate computations of geometric intersection for any Shape object if a more precise answer is required.

Specified by:

intersects in interface Shape

Parameters:

x - the x coordinate of the specified rectangular area

y - the y coordinate of the specified rectangular area

w - the width of the specified rectangular area

h - the height of the specified rectangular area

Returns:

true if the interior of the Shape and the interior of the rectangular area intersect, or are both highly likely to intersect and intersection calculations would be too expensive to perform; false otherwise.

See Also:

Area

intersects

public boolean intersects(Rectangle2D r)

Tests if the interior of the Shape intersects the interior of a specified Rectangle2D. This method might conservatively return true when:

• there is a high probability that the Rectangle2D and the Shape intersect, but
• the calculations to accurately determine this intersection are prohibitively expensive.

This means that this method might return true even though the Rectangle2D does not intersect the Shape.

Specified by:

intersects in interface Shape

Parameters:

r - the specified Rectangle2D

Returns:

true if the interior of the Shape and the interior of the specified Rectangle2D intersect, or are both highly likely to intersect and intersection calculations would be too expensive to perform; false otherwise.

See Also:

Shape.intersects(double, double, double, double)

contains

public boolean contains(double x,
                        double y,
                        double w,
                        double h)

Tests if the interior of the Shape entirely contains the specified rectangular area. All coordinates that lie inside the rectangular area must lie within the Shape for the entire rectanglar area to be considered contained within the Shape.

This method might conservatively return false when:

• the intersect method returns true and
• the calculations to determine whether or not the Shape entirely contains the rectangular area are prohibitively expensive.

This means that this method might return false even though the Shape contains the rectangular area. The Area class can be used to perform more accurate computations of geometric intersection for any Shape object if a more precise answer is required.

Specified by:

contains in interface Shape

Parameters:

x - the x coordinate of the specified rectangular area

y - the y coordinate of the specified rectangular area

w - the width of the specified rectangular area

h - the height of the specified rectangular area

Returns:

true if the interior of the Shape entirely contains the specified rectangular area; false otherwise or, if the Shape contains the rectangular area and the intersects method returns true and the containment calculations would be too expensive to perform.

See Also:

Area, Shape.intersects(double, double, double, double)

contains

public boolean contains(Rectangle2D r)

Tests if the interior of the Shape entirely contains the specified Rectangle2D. This method might conservatively return false when:

• the intersect method returns true and
• the calculations to determine whether or not the Shape entirely contains the Rectangle2D are prohibitively expensive.

This means that this method might return false even though the Shape contains the Rectangle2D. The Area class can be used to perform more accurate computations of geometric intersection for any Shape object if a more precise answer is required.

Specified by:

contains in interface Shape

Parameters:

r - The specified Rectangle2D

Returns:

true if the interior of the Shape entirely contains the Rectangle2D; false otherwise or, if the Shape contains the Rectangle2D and the intersects method returns true and the containment calculations would be too expensive to perform.

See Also:

Shape.contains(double, double, double, double)

getPathIterator

public PathIterator getPathIterator(AffineTransform at)

Returns an iterator object that iterates along the Shape boundary and provides access to the geometry of the Shape outline. If an optional AffineTransform is specified, the coordinates returned in the iteration are transformed accordingly.

Each call to this method returns a fresh PathIterator object that traverses the geometry of the Shape object independently from any other PathIterator objects in use at the same time.

It is recommended, but not guaranteed, that objects implementing the Shape interface isolate iterations that are in process from any changes that might occur to the original object's geometry during such iterations.

Before using a particular implementation of the Shape interface in more than one thread simultaneously, refer to its documentation to verify that it guarantees that iterations are isolated from modifications.

Specified by:

getPathIterator in interface Shape

Parameters:

at - an optional AffineTransform to be applied to the coordinates as they are returned in the iteration, or null if untransformed coordinates are desired

Returns:

a new PathIterator object, which independently traverses the geometry of the Shape.

getPathIterator

public PathIterator getPathIterator(AffineTransform at,
                                    double flatness)

Returns an iterator object that iterates along the Shape boundary and provides access to a flattened view of the Shape outline geometry.

Only SEG_MOVETO, SEG_LINETO, and SEG_CLOSE point types are returned by the iterator.

If an optional AffineTransform is specified, the coordinates returned in the iteration are transformed accordingly.

The amount of subdivision of the curved segments is controlled by the flatness parameter, which specifies the maximum distance that any point on the unflattened transformed curve can deviate from the returned flattened path segments. Note that a limit on the accuracy of the flattened path might be silently imposed, causing very small flattening parameters to be treated as larger values. This limit, if there is one, is defined by the particular implementation that is used.

Each call to this method returns a fresh PathIterator object that traverses the Shape object geometry independently from any other PathIterator objects in use at the same time.

It is recommended, but not guaranteed, that objects implementing the Shape interface isolate iterations that are in process from any changes that might occur to the original object's geometry during such iterations.

Before using a particular implementation of this interface in more than one thread simultaneously, refer to its documentation to verify that it guarantees that iterations are isolated from modifications.

Specified by:

getPathIterator in interface Shape

Parameters:

at - an optional AffineTransform to be applied to the coordinates as they are returned in the iteration, or null if untransformed coordinates are desired

flatness - the maximum distance that the line segments used to approximate the curved segments are allowed to deviate from any point on the original curve

Returns:

a new PathIterator that independently traverses the Shape geometry.