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Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class RoundRectangle2D - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.awt.geom
Class RoundRectangle2D

java.lang.Object
  |
  +--java.awt.geom.RectangularShape
        |
        +--java.awt.geom.RoundRectangle2D
Direct Known Subclasses:
RoundRectangle2D.Double, RoundRectangle2D.Float
public abstract class RoundRectangle2D
extends RectangularShape

The RoundRectangle2D class defines a rectangle with rounded corners defined by a location (x, y), a dimension (w x h), and the width and height of an arc with which to round the corners.

This class is the abstract superclass for all objects that store a 2D rounded rectangle. The actual storage representation of the coordinates is left to the subclass.

Inner Class Summary
static class RoundRectangle2D.Double
          The Double class defines a rectangle with rounded corners all specified in double coordinates.
static class RoundRectangle2D.Float
          The Float class defines a rectangle with rounded corners all specified in float coordinates.
 
Constructor Summary
protected RoundRectangle2D()
          This is an abstract class that cannot be instantiated directly.
 
Method Summary
 boolean contains(double x, double y)
          Tests if the specified coordinates are inside the boundary of this RoundRectangle2D.
 boolean contains(double x, double y, double w, double h)
          Tests if the interior of this RoundRectangle2D entirely contains the specified set of rectangular coordinates.
abstract  double getArcHeight()
          Gets the height of the arc that rounds off the corners.
abstract  double getArcWidth()
          Gets the width of the arc that rounds off the corners.
 PathIterator getPathIterator(AffineTransform at)
          Returns an iteration object that defines the boundary of this RoundRectangle2D.
 boolean intersects(double x, double y, double w, double h)
          Tests if the interior of this RoundRectangle2D intersects the interior of a specified set of rectangular coordinates.
 void setFrame(double x, double y, double w, double h)
          Sets the location and size of the outer bounds of this RoundRectangle2D to the specified rectangular values.
abstract  void setRoundRect(double x, double y, double w, double h, double arcWidth, double arcHeight)
          Sets the location, size, and corner radii of this RoundRectangle2D to the specified double values.
 void setRoundRect(RoundRectangle2D rr)
          Sets this RoundRectangle2D to be the same as the specified RoundRectangle2D.
 
Methods inherited from class java.awt.geom.RectangularShape
clone, contains, contains, getBounds, getCenterX, getCenterY, getFrame, getHeight, getMaxX, getMaxY, getMinX, getMinY, getPathIterator, getWidth, getX, getY, intersects, isEmpty, setFrame, setFrame, setFrameFromCenter, setFrameFromCenter, setFrameFromDiagonal, setFrameFromDiagonal
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

RoundRectangle2D

protected RoundRectangle2D()
This is an abstract class that cannot be instantiated directly. Type-specific implementation subclasses are available for instantiation and provide a number of formats for storing the information necessary to satisfy the various accessor methods below.
See Also:
RoundRectangle2D.Float, RoundRectangle2D.Double
Method Detail

getArcWidth

public abstract double getArcWidth()
Gets the width of the arc that rounds off the corners.
Returns:
the width of the arc that rounds off the corners of this RoundRectangle2D.

getArcHeight

public abstract double getArcHeight()
Gets the height of the arc that rounds off the corners.
Returns:
the height of the arc that rounds off the corners of this RoundRectangle2D.

setRoundRect

public abstract void setRoundRect(double x,
                                  double y,
                                  double w,
                                  double h,
                                  double arcWidth,
                                  double arcHeight)
Sets the location, size, and corner radii of this RoundRectangle2D to the specified double values.
Parameters:
x, y - the coordinates to which to set the location of this RoundRectangle2D
w - the width to which to set this RoundRectangle2D
h - the height to which to set this RoundRectangle2D
arcWidth - the width to which to set the arc of this RoundRectangle2D
arcHeight - the height to which to set the arc of this RoundRectangle2D

setRoundRect

public void setRoundRect(RoundRectangle2D rr)
Sets this RoundRectangle2D to be the same as the specified RoundRectangle2D.
Parameters:
rr - the specified RoundRectangle2D

setFrame

public void setFrame(double x,
                     double y,
                     double w,
                     double h)
Sets the location and size of the outer bounds of this RoundRectangle2D to the specified rectangular values.
Overrides:
setFrame in class RectangularShape
Parameters:
x, y - the coordinates to which to set the location of this RoundRectangle2D
w - the width to which to set this RoundRectangle2D
h - the height to which to set this RoundRectangle2D

contains

public boolean contains(double x,
                        double y)
Tests if the specified coordinates are inside the boundary of this RoundRectangle2D.
Parameters:
x, y - the coordinates to test
Returns:
true if the specified coordinates are inside the boundary of this RoundRectangle2D; false otherwise.

intersects

public boolean intersects(double x,
                          double y,
                          double w,
                          double h)
Tests if the interior of this RoundRectangle2D intersects the interior of a specified set of rectangular coordinates.
Parameters:
x, y - the coordinates of the upper left corner of the specified set of rectangular coordinates
w - the width of the specified set of rectangular coordinates
h - the height of the specified set of rectangular coordinates
Returns:
true if the interior of this RoundRectangle2D intersects the interior of the specified set of rectangular coordinates.

contains

public boolean contains(double x,
                        double y,
                        double w,
                        double h)
Tests if the interior of this RoundRectangle2D entirely contains the specified set of rectangular coordinates.
Parameters:
x, y - the coordinates of the specified set of rectangular coordinates
w - the width of the specified set of rectangular coordinates
h - the height of the specified set of rectangular coordinates
Returns:
true if the interior of this RoundRectangle2D entirely contains the specified set of rectangular coordinates; false otherwise.

getPathIterator

public PathIterator getPathIterator(AffineTransform at)
Returns an iteration object that defines the boundary of this RoundRectangle2D. The iterator for this class is multi-threaded safe, which means that this RoundRectangle2D class guarantees that modifications to the geometry of this RoundRectangle2D object do not affect any iterations of that geometry that are already in process.
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:
the PathIterator object that returns the geometry of the outline of this RoundRectangle2D, one segment at a time.
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