com.sun.jimi.core.util
Class AreaCoverage

java.lang.Object
  |
  +--com.sun.jimi.core.util.AreaCoverage

public class AreaCoverage

extends java.lang.Object

This class is used to track the area of coverage of a given area (width x height) of a cartesian coordinate system. A single point may be represented as a coordinate with a width of 1 and a height of 1 though this class is not likely to be efficient for point tracking of area coverage No concurrency of access issues are dealt with in this class.

Constructor Summary

AreaCoverage(int w, int h)

Method Summary

void	add(int row)
void	add(int x, int y, int width, int height) Add coverage for specified region.
boolean	contains(int row)
boolean	contains(int x, int y, int w, int h)
java.awt.Rectangle	getBounds()
protected void	mergeRecords(int idx) Process the covered rectangles collection and merge records where it is possible to.
void	reset() Reset the area covered to none.

Methods inherited from class java.lang.Object

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

Constructor Detail

AreaCoverage

public AreaCoverage(int w,
                    int h)

Parameters:

w - width of area to track coverage on

h - height of area to track coverage on

Method Detail

reset

public void reset()

Reset the area covered to none.

add

public void add(int x,
                int y,
                int width,
                int height)

Add coverage for specified region.

Parameters:

x - horizontal coordinate for area to cover

y - vertical coordinate for area to cover

width - width of area to cover

height - height of area to cover

add

public void add(int row)

Parameters:

row - the row that is being covered

contains

public boolean contains(int row)

Parameters:

the - row to check for coverage on

Returns:

True if row is covered

contains

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

Parameters:

x - horizontal coordinate for area to check for coverage

y - vertical coordinate for area to check for coverage

width - width of area to check for coverage

height - height of area to check for coverage

Returns:

True if area specified is allready covered by rectangles

mergeRecords

protected void mergeRecords(int idx)

Process the covered rectangles collection and merge records where it is possible to.

Parameters:

idx - is the record that has changed and is the only rectangle that might be merged with adjacent rectangles.

getBounds

public java.awt.Rectangle getBounds()

Returns:

the bounding rectangle representing the area that has been covered.