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java.awt.geom
Class RectangularShape

java.lang.Object
  |
  +--java.awt.geom.RectangularShape

Direct Known Subclasses:

Arc2D, Ellipse2D, Rectangle2D, RoundRectangle2D

public abstract class RectangularShape

extends Object

implements Shape, Cloneable

RectangularShape is the base class for a number of Shape objects whose geometry is defined by a rectangular frame. This class does not directly specify any specific geometry by itself, but merely provides manipulation methods inherited by a whole category of Shape objects. The manipulation methods provided by this class can be used to query and modify the rectangular frame, which provides a reference for the subclasses to define their geometry.

Constructor Summary

protected

RectangularShape() This is an abstract class that cannot be instantiated directly.

Method Summary

Object	clone() Creates a new object of the same class and with the same contents as this object.
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 the bounding box of the Shape.
double	getCenterX() Returns the X coordinate of the center of the framing rectangle of the Shape in double precision.
double	getCenterY() Returns the Y coordinate of the center of the framing rectangle of the Shape in double precision.
Rectangle2D	getFrame() Returns the framing Rectangle2D that defines the overall shape of this object.
abstract double	getHeight() Returns the height of the framing rectangle in double precision.
double	getMaxX() Returns the largest X coordinate of the framing rectangle of the Shape in double precision.
double	getMaxY() Returns the largest Y coordinate of the framing rectangle of the Shape in double precision.
double	getMinX() Returns the smallest X coordinate of the framing rectangle of the Shape in double precision.
double	getMinY() Returns the smallest Y coordinate of the framing rectangle of the Shape in double precision.
PathIterator	getPathIterator(AffineTransform at, double flatness) Returns an iterator object that iterates along the Shape object's boundary and provides access to a flattened view of the outline of the Shape object's geometry.
abstract double	getWidth() Returns the width of the framing rectangle in double precision.
abstract double	getX() Returns the X coordinate of the upper left corner of the framing rectangle in double precision.
abstract double	getY() Returns the Y coordinate of the upper left corner of the framing rectangle in double precision.
boolean	intersects(Rectangle2D r) Tests if the interior of theShape intersects the interior of a specified Rectangle2D.
abstract boolean	isEmpty() Determines whether the RectangularShape is empty.
abstract void	setFrame(double x, double y, double w, double h) Sets the location and size of the framing rectangle of this Shape to the specified rectangular values.
void	setFrame(Point2D loc, Dimension2D size) Sets the location and size of the framing rectangle of this Shape to the specified Point2D and Dimension2D, respectively.
void	setFrame(Rectangle2D r) Sets the framing rectangle of this Shape to be the specified Rectangle2D.
void	setFrameFromCenter(double centerX, double centerY, double cornerX, double cornerY) Sets the framing rectangle of this Shape based on the specified center point coordinates and corner point coordinates.
void	setFrameFromCenter(Point2D center, Point2D corner) Sets the framing rectangle of this Shape based on a specified center Point2D and corner Point2D.
void	setFrameFromDiagonal(double x1, double y1, double x2, double y2) Sets the diagonal of the framing rectangle of this Shape based on the two specified coordinates.
void	setFrameFromDiagonal(Point2D p1, Point2D p2) Sets the diagonal of the framing rectangle of this Shape based on two specified Point2D objects.

Methods inherited from class java.lang.Object

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

Constructor Detail

RectangularShape

protected RectangularShape()

This is an abstract class that cannot be instantiated directly.

See Also:

Arc2D, Ellipse2D, Rectangle2D, RoundRectangle2D

Method Detail

getX

public abstract double getX()

Returns the X coordinate of the upper left corner of the framing rectangle in double precision.

Returns:

the x coordinate of the upper left corner of the framing rectangle.

getY

public abstract double getY()

Returns the Y coordinate of the upper left corner of the framing rectangle in double precision.

Returns:

the y coordinate of the upper left corner of the framing rectangle.

getWidth

public abstract double getWidth()

Returns the width of the framing rectangle in double precision.

Returns:

the width of the framing rectangle.

getHeight

public abstract double getHeight()

Returns the height of the framing rectangle in double precision.

Returns:

the height of the framing rectangle.

getMinX

public double getMinX()

Returns the smallest X coordinate of the framing rectangle of the Shape in double precision.

Returns:

the smallest x coordinate of the framing rectangle of the Shape.

getMinY

public double getMinY()

Returns the smallest Y coordinate of the framing rectangle of the Shape in double precision.

Returns:

the smallest y coordinate of the framing rectangle of the Shape.

getMaxX

public double getMaxX()

Returns the largest X coordinate of the framing rectangle of the Shape in double precision.

Returns:

the largest x coordinate of the framing rectangle of the Shape.

getMaxY

public double getMaxY()

Returns the largest Y coordinate of the framing rectangle of the Shape in double precision.

Returns:

the largest y coordinate of the framing rectangle of the Shape.

getCenterX

public double getCenterX()

Returns the X coordinate of the center of the framing rectangle of the Shape in double precision.

Returns:

the x coordinate of the framing rectangle of the Shape object's center.

getCenterY

public double getCenterY()

Returns the Y coordinate of the center of the framing rectangle of the Shape in double precision.

Returns:

the y coordinate of the framing rectangle of the Shape object's center.

getFrame

public Rectangle2D getFrame()

Returns the framing Rectangle2D that defines the overall shape of this object.

Returns:

a Rectangle2D, specified in double coordinates.

isEmpty

public abstract boolean isEmpty()

Determines whether the RectangularShape is empty. When the RectangularShape is empty, it encloses no area.

Returns:

true if the RectangularShape is empty; false otherwise.

setFrame

public abstract void setFrame(double x,
                              double y,
                              double w,
                              double h)

Sets the location and size of the framing rectangle of this Shape to the specified rectangular values. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

Parameters:

x, y - the coordinates of the upper-left corner of the specified rectangular shape

w - the width of the specified rectangular shape

h - the height of the specified rectangular shape

setFrame

public void setFrame(Point2D loc,
                     Dimension2D size)

Sets the location and size of the framing rectangle of this Shape to the specified Point2D and Dimension2D, respectively. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

Parameters:

loc - the specified Point2D

size - the specified Dimension2D

setFrame

public void setFrame(Rectangle2D r)

Sets the framing rectangle of this Shape to be the specified Rectangle2D. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

Parameters:

r - the specified Rectangle2D

setFrameFromDiagonal

public void setFrameFromDiagonal(double x1,
                                 double y1,
                                 double x2,
                                 double y2)

Sets the diagonal of the framing rectangle of this Shape based on the two specified coordinates. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

Parameters:

x1, y1 - the first specified coordinates

x2, y2 - the second specified coordinates

setFrameFromDiagonal

public void setFrameFromDiagonal(Point2D p1,
                                 Point2D p2)

Sets the diagonal of the framing rectangle of this Shape based on two specified Point2D objects. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

Parameters:

p1, p2 - the two specified Point2D objects

setFrameFromCenter

public void setFrameFromCenter(double centerX,
                               double centerY,
                               double cornerX,
                               double cornerY)

Sets the framing rectangle of this Shape based on the specified center point coordinates and corner point coordinates. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

Parameters:

centerX, centerY - the center point coordinates

cornerX, cornerY - the corner point coordinates

setFrameFromCenter

public void setFrameFromCenter(Point2D center,
                               Point2D corner)

Sets the framing rectangle of this Shape based on a specified center Point2D and corner Point2D. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

Parameters:

center - the specified center Point2D

corner - the specified corner Point2D

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 - the specified Point2D

Returns:

true if the Point2D is inside the Shape object's boundary; false otherwise.

intersects

public boolean intersects(Rectangle2D r)

Tests if the interior of theShape intersects the interior of a specified Rectangle2D.

Specified by:

intersects in interface Shape

Parameters:

r - the specified Rectangle2D

Returns:

true if the Shape and the specified Rectangle2D intersect each other; false otherwise.

contains

public boolean contains(Rectangle2D r)

Tests if the interior of the Shape entirely contains the specified Rectangle2D.

Specified by:

contains in interface Shape

Parameters:

r - the specified Rectangle2D

Returns:

true if the Shape entirely contains the specified Rectangle2D; false otherwise.

getBounds

public Rectangle getBounds()

Returns the bounding box of the Shape.

Specified by:

getBounds in interface Shape

Returns:

a Rectangle object that bounds the Shape.

getPathIterator

public PathIterator getPathIterator(AffineTransform at,
                                    double flatness)

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

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

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. An optional AffineTransform can be specified so that the coordinates returned in the iteration are transformed accordingly.

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 PathIterator object that provides access to the Shape object's flattened geometry.

clone

public Object clone()

Creates a new object of the same class and with the same contents as this object.

Overrides:

clone in class Object

Returns:

a clone of this instance.

Throws:

OutOfMemoryError - if there is not enough memory.

Since:

JDK1.2

See Also:

Cloneable