Package org.jungrapht.visualization.renderers

Class DefaultEdgeArrowRenderingSupport<V,E>

java.lang.Object

org.jungrapht.visualization.renderers.DefaultEdgeArrowRenderingSupport<V,E>

Type Parameters:

V - vertex type

E - edge type

All Implemented Interfaces:

EdgeArrowRenderingSupport<V,E>

public class DefaultEdgeArrowRenderingSupport<V,E>
extends Object
implements EdgeArrowRenderingSupport<V,E>

Constructor Summary

Constructors

Constructor	Description
DefaultEdgeArrowRenderingSupport()

Method Summary

Modifier and Type	Method	Description
AffineTransform	getArrowTransform(RenderContext<V,E> rc, Line2D edgeShape, Shape vertexShape)	Returns a transform to position the arrowhead on this edge shape at the point where it intersects the passed vertex shape.
AffineTransform	getArrowTransform(RenderContext<V,E> rc, Shape edgeShape, Shape vertexShape)	Returns a transform to position the arrowhead on this edge shape at the point where it intersects the passed vertex shape.
protected Line2D	getFirstOutsideSegment(Line2D line, Shape shape)	Returns a line that intersects shape's boundary.
protected Line2D	getLastOutsideSegment(Line2D line, Shape shape)	Returns a line that intersects shape's boundary.
protected AffineTransform	getReverseArrowTransform(RenderContext<V,E> rc, Line2D edgeShape, Shape vertexShape)
AffineTransform	getReverseArrowTransform(RenderContext<V,E> rc, Shape edgeShape, Shape vertexShape)	Returns a transform to position the arrowhead on this edge shape at the point where it intersects the passed vertex shape.
AffineTransform	getReverseArrowTransform(RenderContext<V,E> rc, Shape edgeShape, Shape vertexShape, boolean passedGo)	Returns a transform to position the arrowhead on this edge shape at the point where it intersects the passed vertex shape.
protected void	subdivide(Line2D src, Line2D left, Line2D right)	divide a Line2D into 2 new Line2Ds that are returned in the passed left and right instances, if non-null

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultEdgeArrowRenderingSupport

public DefaultEdgeArrowRenderingSupport()

Method Detail

getArrowTransform

public AffineTransform getArrowTransform(RenderContext<V,E> rc,
                                         Shape edgeShape,
                                         Shape vertexShape)

Description copied from interface: EdgeArrowRenderingSupport

Returns a transform to position the arrowhead on this edge shape at the point where it intersects the passed vertex shape.

Specified by:

getArrowTransform in interface EdgeArrowRenderingSupport<V,E>

Parameters:

rc - the rendering context used for rendering the arrow

edgeShape - the shape used to draw the edge

vertexShape - the shape used to draw the vertex

Returns:

a transform used for positioning the arrowhead for this vertex and edge

getReverseArrowTransform

public AffineTransform getReverseArrowTransform(RenderContext<V,E> rc,
                                                Shape edgeShape,
                                                Shape vertexShape)

Description copied from interface: EdgeArrowRenderingSupport

Returns a transform to position the arrowhead on this edge shape at the point where it intersects the passed vertex shape.

Specified by:

getReverseArrowTransform in interface EdgeArrowRenderingSupport<V,E>

Parameters:

rc - the rendering context used for rendering the arrow

edgeShape - the shape used to draw the edge

vertexShape - the shape used to draw the vertex

Returns:

a transform used for positioning the arrowhead for this vertex and edge

getReverseArrowTransform

public AffineTransform getReverseArrowTransform(RenderContext<V,E> rc,
                                                Shape edgeShape,
                                                Shape vertexShape,
                                                boolean passedGo)

Description copied from interface: EdgeArrowRenderingSupport

Returns a transform to position the arrowhead on this edge shape at the point where it intersects the passed vertex shape.

The Loop edge is a special case because its starting point is not inside the vertex. The passedGo flag handles this case.

Specified by:

getReverseArrowTransform in interface EdgeArrowRenderingSupport<V,E>

Parameters:

rc - the rendering context used for rendering the arrow

edgeShape - the shape used to draw the edge

vertexShape - the shape used to draw the vertex

passedGo - used for rendering loop edges

Returns:

a transform used for positioning the arrowhead for this vertex and edge

getArrowTransform

public AffineTransform getArrowTransform(RenderContext<V,E> rc,
                                         Line2D edgeShape,
                                         Shape vertexShape)

Description copied from interface: EdgeArrowRenderingSupport

Returns a transform to position the arrowhead on this edge shape at the point where it intersects the passed vertex shape.

Specified by:

getArrowTransform in interface EdgeArrowRenderingSupport<V,E>

Parameters:

rc - the rendering context used for rendering the arrow

edgeShape - the shape used to draw the edge

vertexShape - the shape used to draw the vertex

Returns:

a transform used for positioning the arrowhead for this vertex and edge

getReverseArrowTransform

protected AffineTransform getReverseArrowTransform(RenderContext<V,E> rc,
                                                   Line2D edgeShape,
                                                   Shape vertexShape)

getLastOutsideSegment

protected Line2D getLastOutsideSegment(Line2D line,
                                       Shape shape)

Returns a line that intersects shape's boundary.

Parameters:

line - line to subdivide

shape - shape to compare with line

Returns:

a line that intersects the shape boundary

Throws:

IllegalArgumentException - if the passed line's point2 is not inside the shape

getFirstOutsideSegment

protected Line2D getFirstOutsideSegment(Line2D line,
                                        Shape shape)

Returns a line that intersects shape's boundary.

Parameters:

line - line to subdivide

shape - shape to compare with line

Returns:

a line that intersects the shape boundary

Throws:

IllegalArgumentException - if the passed line's point1 is not inside the shape

subdivide

protected void subdivide(Line2D src,
                         Line2D left,
                         Line2D right)

divide a Line2D into 2 new Line2Ds that are returned in the passed left and right instances, if non-null

Parameters:

src - the line to divide

left - the left side, or null

right - the right side, or null