org.geotools.styling

Class GraphicImpl

Object

GraphicImpl

All Implemented Interfaces:

Cloneable, Graphic, GraphicFill, GraphicLegend, GraphicStroke

public class GraphicImpl
extends Object
implements Graphic, Cloneable

Direct implementation of Graphic.

Author:

Ian Turton, CCG, Johann Sorel (Geomatys)

Field Summary

Fields inherited from interface Graphic

DEFAULT, NULL

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	GraphicImpl() Creates a new instance of DefaultGraphic
	GraphicImpl(FilterFactory factory)
	GraphicImpl(FilterFactory factory, AnchorPoint anchor, Expression gap, Expression initialGap)

Method Summary

Modifier and Type	Method and Description
void	accept(StyleVisitor visitor) accepts a StyleVisitor - used by xmlencoder and other packages which need to walk the style tree
Object	accept(StyleVisitor visitor, Object data) calls the visit method of a StyleVisitor
Object	clone() Creates a deep copy clone.
boolean	equals(Object oth) Compares this GraphicImpl with another for equality.
AnchorPointImpl	getAnchorPoint() Location inside of the Graphic (or Label) to position the main-geometry point.
DisplacementImpl	getDisplacement() The Displacement gives the X and Y displacements from the "hot-spot" point.
Expression	getGap() Gap gives the distance between two graphics.
Expression	getInitialGap() InitialGap specifies how far away the first graphic will be drawn relative to the start of the rendering line
Expression	getOpacity() This specifies the level of translucency to use when rendering the graphic.
Expression	getRotation() This parameter defines the rotation of a graphic in the clockwise direction about its centre point in decimal degrees.
Expression	getSize() This paramteter gives the absolute size of the graphic in pixels encoded as a floating point number.
List<GraphicalSymbol>	graphicalSymbols() List of all symbols used to represent this graphic.
int	hashCode() Override of hashcode
void	setAnchorPoint(AnchorPoint anchor)
void	setAnchorPoint(AnchorPoint anchorPoint) Anchor point (expressed as an x/y percentage of the graphic size).
void	setDisplacement(Displacement offset)
void	setGap(Expression gap)
void	setInitialGap(Expression initialGap)
void	setOpacity(Expression opacity) Graphic opacity.
void	setRotation(Expression rotation) Setter for property rotation.
void	setSize(Expression size) Setter for property size.

Methods inherited from class Object

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

Constructor Detail

GraphicImpl

protected GraphicImpl()

Creates a new instance of DefaultGraphic

GraphicImpl

public GraphicImpl(FilterFactory factory)

GraphicImpl

public GraphicImpl(FilterFactory factory,
                   AnchorPoint anchor,
                   Expression gap,
                   Expression initialGap)

Method Detail

graphicalSymbols

public List<GraphicalSymbol> graphicalSymbols()

Description copied from interface: Graphic

List of all symbols used to represent this graphic.

Specified by:

graphicalSymbols in interface Graphic

Returns:

List of ExternalGraphic or Mark in the order provided.

getAnchorPoint

public AnchorPointImpl getAnchorPoint()

Description copied from interface: Graphic

Location inside of the Graphic (or Label) to position the main-geometry point.

The coordinates are provided as 0.0 to 1.0 range amounting to a percentage of the graphic width/height. So the default of 0.5/0.5 indicates that the graphic would be centered.

Please keep in mind that a system may shuffle things around a bit in order to prevent graphics from overlapping (so this AnchorPoint is only a hint about how things should be if there is enough room).

Specified by:

getAnchorPoint in interface Graphic

Returns:

AnchorPoint , if null should use a default point X=0.5 Y=0.5

setAnchorPoint

public void setAnchorPoint(AnchorPoint anchor)

setAnchorPoint

public void setAnchorPoint(AnchorPoint anchorPoint)

Description copied from interface: Graphic

Anchor point (expressed as an x/y percentage of the graphic size).

getOpacity

public Expression getOpacity()

This specifies the level of translucency to use when rendering the graphic.
The value is encoded as a floating-point value between 0.0 and 1.0 with 0.0 representing totally transparent and 1.0 representing totally opaque, with a linear scale of translucency for intermediate values.
For example, "0.65" would represent 65% opacity. The default value is 1.0 (opaque).

Specified by:

getOpacity in interface Graphic

Returns:

The opacity of the Graphic, where 0.0 is completely transparent and 1.0 is completely opaque.

getRotation

public Expression getRotation()

This parameter defines the rotation of a graphic in the clockwise direction about its centre point in decimal degrees. The value encoded as a floating point number.

Specified by:

getRotation in interface Graphic

Returns:

The angle of rotation in decimal degrees. Negative values represent counter-clockwise rotation. The default is 0.0 (no rotation).

getSize

public Expression getSize()

This paramteter gives the absolute size of the graphic in pixels encoded as a floating point number.

The default size of an image format (such as GIFD) is the inherent size of the image. The default size of a format without an inherent size (such as SVG) is defined to be 16 pixels in height and the corresponding aspect in width. If a size is specified, the height of the graphic will be scaled to that size and the corresponding aspect will be used for the width.

Specified by:

getSize in interface Graphic

Returns:

The size of the graphic, the default is context specific. Negative values are not possible.

getDisplacement

public DisplacementImpl getDisplacement()

Description copied from interface: Graphic

The Displacement gives the X and Y displacements from the "hot-spot" point. This element may be used to avoid over-plotting of multiple graphic symbols used as part of the same point symbol. The displacements are in units of measure above and to the right of the point. The default displacement is X=0, Y=0.

If Displacement is used in conjunction with Size and/or Rotation then the graphic symbol shall be scaled and/or rotated before it is displaced.s

Specified by:

getDisplacement in interface Graphic

Returns:

Offset of graphic

getInitialGap

public Expression getInitialGap()

Description copied from interface: GraphicStroke

InitialGap specifies how far away the first graphic will be drawn relative to the start of the rendering line

Specified by:

getInitialGap in interface GraphicStroke

Returns:

Expression

setInitialGap

public void setInitialGap(Expression initialGap)

getGap

public Expression getGap()

Description copied from interface: GraphicStroke

Gap gives the distance between two graphics.

Specified by:

getGap in interface GraphicStroke

Returns:

Expression

setGap

public void setGap(Expression gap)

setDisplacement

public void setDisplacement(Displacement offset)

Parameters:

offset - Amount to offset graphic

setOpacity

public void setOpacity(Expression opacity)

Description copied from interface: GraphicLegend

Graphic opacity.

Parameters:

opacity - opacity between 0 and 1

setRotation

public void setRotation(Expression rotation)

Setter for property rotation.

Parameters:

rotation - New value of property rotation.

setSize

public void setSize(Expression size)

Setter for property size.

Parameters:

size - New value of property size.

accept

public Object accept(StyleVisitor visitor,
                     Object data)

Description copied from interface: GraphicLegend

calls the visit method of a StyleVisitor

Specified by:

accept in interface Graphic

Specified by:

accept in interface GraphicFill

Specified by:

accept in interface GraphicLegend

Specified by:

accept in interface GraphicStroke

Parameters:

visitor - the style visitor

accept

public void accept(StyleVisitor visitor)

Description copied from interface: Graphic

accepts a StyleVisitor - used by xmlencoder and other packages which need to walk the style tree

Parameters:

visitor - - the visitor object

clone

public Object clone()

Creates a deep copy clone.

Overrides:

clone in class Object

Returns:

The deep copy clone.

See Also:

Object.clone()

hashCode

public int hashCode()

Override of hashcode

Overrides:

hashCode in class Object

Returns:

The hashcode.

equals

public boolean equals(Object oth)

Compares this GraphicImpl with another for equality.

Two graphics are equal if and only if they both have the same geometry property name and the same list of symbols and the same rotation, size and opacity.

Overrides:

equals in class Object

Parameters:

oth - The other GraphicsImpl to compare with.

Returns:

True if this is equal to oth according to the above conditions.