com.jniwrapper.win32.gdi

Class Region

java.lang.Object

com.jniwrapper.Parameter

com.jniwrapper.Pointer.Void

com.jniwrapper.win32.Handle

com.jniwrapper.win32.gdi.GdiObject

com.jniwrapper.win32.gdi.Region

All Implemented Interfaces:

com.jniwrapper.IntegerParameter, com.jniwrapper.PointerParameter

public class Region
extends GdiObject

This class provides operations on region objects.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Region.CombineMode CombineMode class represents EnumItemeration of combined operations.

Nested classes/interfaces inherited from class com.jniwrapper.win32.gdi.GdiObject

GdiObject.ImageLoadParameters, GdiObject.ImageType, GdiObject.Type

Field Summary

Fields

Modifier and Type	Field and Description
static int	COMPLEXREGION The region consists of more than one rectangle.
static int	NULLREGION The region is empty.
static int	RGN_ERROR
static int	SIMPLEREGION The region consists of a single rectangle.

Fields inherited from class com.jniwrapper.win32.gdi.GdiObject

GDI_ERROR, HGDI_ERROR

Fields inherited from class com.jniwrapper.win32.Handle

INFINITE_TIMEOUT, INVALID_HANDLE_VALUE, STATUS_ABANDONED_WAIT_0, STATUS_TIMEOUT, STATUS_WAIT_0

Fields inherited from class com.jniwrapper.Parameter

LICENSE_TYPE, V

Constructor Summary

Constructors

Constructor and Description
Region()
Region(long value)

Method Summary

Modifier and Type	Method and Description
static Region	combineRgn(Region srcRgn1, Region srcRgn2, Region.CombineMode combineMode) Creates a combined region from two specified regions.
static Region	createElliptic(int left, int top, int right, int bottom) Factory method for creating elliptic regions.
static Region	createElliptic(Rect rect) Factory method for creating elliptic regions via bounding rectangle.
static Region	createFromImage(java.awt.Image image) Creates a region from the specified image.
static Region	createFromImage(java.awt.Image image, java.awt.Color transparent) Creates a region from the specified image.
static Region	createFromImage(java.awt.Image image, java.awt.Color transparent, java.awt.Color tolerance) Creates a region from specified image.
static Region	createPolygonRgn(Point[] points, int nPoints, PolyFillMode polyFillMode) Creates a polygonal region.
static Region	createPolyPolygonRgn(Point[] points, int[] polyCounts, int count, PolyFillMode polyFillMode) Creates a region consisting of a series of polygons.
static Region	createRectRegion(int left, int top, int right, int bottom) Creates a rectangular region.
static Region	createRectRegion(Rect rect) Creates a rectangular region.
static Region	createRoundRectRegion(int left, int top, int right, int bottom, int ellipseWidth, int ellipseHight)
boolean	equalRegion(Region region) Checks the two specified regions to determine whether they are identical.
int	getRagionData(com.jniwrapper.PrimitiveArray rgnData, int count) Fills the specified buffer with data describing a region.
Rect	getRegionBox() Retrieves the bounding rectangle of the region.
boolean	isPointInRegion(int x, int y) Determines whether the specified point is inside the specified region.
boolean	isPointInRegion(Point point) Determines whether the specified point is inside the specified region.
boolean	isRectInRegion(Rect rect) Determines whether any part of the specified rectangle is within the boundaries of a region.
void	offsetRegion(int xOffset, int yOffset) Moves a region by the specified offsets.
void	setRectRegion(int left, int top, int right, int bottom) Converts a region into a rectangular region with the specified coordinates.

Methods inherited from class com.jniwrapper.win32.gdi.GdiObject

deleteObject, getObject, getObjectType

Methods inherited from class com.jniwrapper.win32.Handle

clone, closeHandle, equals, waitFor, waitFor

Methods inherited from class com.jniwrapper.Pointer.Void

asFunction, asFunction, asTypedPointer, castTo, castTo, getDebugInfo, getLength, getValue, hashCode, isNull, read, setValue, toString, write

Methods inherited from class com.jniwrapper.Parameter

acceptIOPerformer, asReturnValue, dataBufferAssigned, getAlignedLength, getAlignmentRequirement, getDataBuffer, getDataBufferOffset, indent, pop, push, read, read, setDataBuffer, toByteArray, write

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

RGN_ERROR

public static final int RGN_ERROR

See Also:

Constant Field Values

NULLREGION

public static final int NULLREGION

The region is empty.

See Also:

Constant Field Values

SIMPLEREGION

public static final int SIMPLEREGION

The region consists of a single rectangle.

See Also:

Constant Field Values

COMPLEXREGION

public static final int COMPLEXREGION

The region consists of more than one rectangle.

See Also:

Constant Field Values

Constructor Detail

Region

public Region()

Region

public Region(long value)

Method Detail

createElliptic

public static Region createElliptic(int left,
                                    int top,
                                    int right,
                                    int bottom)

Factory method for creating elliptic regions.

Returns:

a created region, which can hold NULL value in case of error.

createElliptic

public static Region createElliptic(Rect rect)

Factory method for creating elliptic regions via bounding rectangle.

Parameters:

rect - bounding rectangle for an elliptic region to be created.

Returns:

a created region, which can hold NULL value in case of error.

createRoundRectRegion

public static Region createRoundRectRegion(int left,
                                           int top,
                                           int right,
                                           int bottom,
                                           int ellipseWidth,
                                           int ellipseHight)

combineRgn

public static Region combineRgn(Region srcRgn1,
                                Region srcRgn2,
                                Region.CombineMode combineMode)

Creates a combined region from two specified regions.

Parameters:

srcRgn1 - the first region.

srcRgn2 - the second region.

combineMode - combine method.

Returns:

a combined region.

createPolygonRgn

public static Region createPolygonRgn(Point[] points,
                                      int nPoints,
                                      PolyFillMode polyFillMode)

Creates a polygonal region.

Parameters:

points -

polyFillMode -

Returns:

polygon region.

createPolyPolygonRgn

public static Region createPolyPolygonRgn(Point[] points,
                                          int[] polyCounts,
                                          int count,
                                          PolyFillMode polyFillMode)

Creates a region consisting of a series of polygons.

Parameters:

points -

polyCounts -

count -

polyFillMode -

Returns:

poly polygon region.

createRectRegion

public static Region createRectRegion(int left,
                                      int top,
                                      int right,
                                      int bottom)

Creates a rectangular region.

Parameters:

left -

top -

right -

bottom -

Returns:

rectangular region.

createRectRegion

public static Region createRectRegion(Rect rect)

Creates a rectangular region.

Parameters:

rect -

Returns:

rectangular region.

equalRegion

public boolean equalRegion(Region region)

Checks the two specified regions to determine whether they are identical.

Parameters:

region -

Returns:

true if the regions are equal, false if otherwise.

getRagionData

public int getRagionData(com.jniwrapper.PrimitiveArray rgnData,
                         int count)

Fills the specified buffer with data describing a region. This data includes the dimensions of the rectangles that make up the region.

Parameters:

rgnData - is a region data buffer.

count - is the size of the region data buffer.

Returns:

count if the function succeeds and count specifies an adequate number of bytes. If count is too small or the function fails, the return value is 0.

getRegionBox

public Rect getRegionBox()

Retrieves the bounding rectangle of the region.

Returns:

the bounding rectangle of the specified region.

offsetRegion

public void offsetRegion(int xOffset,
                         int yOffset)

Moves a region by the specified offsets.

Parameters:

xOffset -

yOffset -

isPointInRegion

public boolean isPointInRegion(int x,
                               int y)

Determines whether the specified point is inside the specified region.

Parameters:

x -

y -

Returns:

true if the point is inside the specified region; false if otherwise.

isPointInRegion

public boolean isPointInRegion(Point point)

Determines whether the specified point is inside the specified region.

Parameters:

point -

Returns:

true if the point is inside the specified region; false if otherwise.

isRectInRegion

public boolean isRectInRegion(Rect rect)

Determines whether any part of the specified rectangle is within the boundaries of a region.

Parameters:

rect -

Returns:

true if any part of the specified rectangle is within the boundaries of a region.; false if otherwise.

setRectRegion

public void setRectRegion(int left,
                          int top,
                          int right,
                          int bottom)

Converts a region into a rectangular region with the specified coordinates.

Parameters:

left -

top -

right -

bottom -

createFromImage

public static Region createFromImage(java.awt.Image image,
                                     java.awt.Color transparent)

Creates a region from the specified image.

Parameters:

image - is a source image.

transparent - is a transparent color of the image.

Returns:

a region created from the image.

createFromImage

public static Region createFromImage(java.awt.Image image,
                                     java.awt.Color transparent,
                                     java.awt.Color tolerance)

Creates a region from specified image.

Parameters:

image - is a source image.

transparent - is a transparent color of the image.

tolerance - is a color tolerance for the transparent color.

Returns:

a region created from the image.

createFromImage

public static Region createFromImage(java.awt.Image image)

Creates a region from the specified image. The image should be transparent so there is no need to specify transparency color.

Parameters:

image - is a source image.

Returns:

a region created from the image.