horstmann.ch08_umleditor

Class SegmentedLineEdge

java.lang.Object

horstmann.ch08_umleditor.AbstractEdge

horstmann.ch08_umleditor.ShapeEdge

horstmann.ch08_umleditor.SegmentedLineEdge

All Implemented Interfaces:

Edge, java.io.Serializable, java.lang.Cloneable

Direct Known Subclasses:

ClassRelationshipEdge

public abstract class SegmentedLineEdge
extends ShapeEdge

An edge that is composed of multiple line segments

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private ArrowHead	endArrowHead
private java.lang.String	endLabel
private static javax.swing.JLabel	label
private LineStyle	lineStyle
private java.lang.String	middleLabel
private ArrowHead	startArrowHead
private java.lang.String	startLabel

Constructor Summary

Constructors

Constructor and Description
SegmentedLineEdge() Costructs an edge with no adornments.

Method Summary

Modifier and Type	Method and Description
void	draw(java.awt.Graphics2D g2) Draws the edge.
private static void	drawString(java.awt.Graphics2D g2, java.awt.geom.Point2D p, java.awt.geom.Point2D q, ArrowHead arrow, java.lang.String s, boolean center) Draws a string.
private static java.awt.geom.Point2D	getAttachmentPoint(java.awt.Graphics2D g2, java.awt.geom.Point2D p, java.awt.geom.Point2D q, ArrowHead arrow, java.awt.Dimension d, boolean center) Computes the attachment point for drawing a string.
java.awt.geom.Rectangle2D	getBounds(java.awt.Graphics2D g2) Gets the smallest rectangle that bounds this edge.
java.awt.geom.Line2D	getConnectionPoints() Gets the points at which this edge is connected to its nodes.
ArrowHead	getEndArrowHead() Gets the end arrow head property
java.lang.String	getEndLabel() Gets the end label property
LineStyle	getLineStyle() Gets the line style property.
java.lang.String	getMiddleLabel() Gets the middle label property
abstract java.util.ArrayList	getPoints() Gets the corner points of this segmented line edge
private java.awt.geom.GeneralPath	getSegmentPath()
java.awt.Shape	getShape() Returns the path that should be stroked to draw this edge.
ArrowHead	getStartArrowHead() Gets the start arrow head property
java.lang.String	getStartLabel() Gets the start label property
private static java.awt.geom.Rectangle2D	getStringBounds(java.awt.Graphics2D g2, java.awt.geom.Point2D p, java.awt.geom.Point2D q, ArrowHead arrow, java.lang.String s, boolean center) Computes the extent of a string that is drawn along a line segment.
void	setEndArrowHead(ArrowHead newValue) Sets the end arrow head property
void	setEndLabel(java.lang.String newValue) Sets the end label property
void	setLineStyle(LineStyle newValue) Sets the line style property.
void	setMiddleLabel(java.lang.String newValue) Sets the middle label property
void	setStartArrowHead(ArrowHead newValue) Sets the start arrow head property
void	setStartLabel(java.lang.String newValue) Sets the start label property

Methods inherited from class horstmann.ch08_umleditor.ShapeEdge

contains

Methods inherited from class horstmann.ch08_umleditor.AbstractEdge

clone, connect, getEnd, getStart

Methods inherited from class java.lang.Object

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

Field Detail

lineStyle

private LineStyle lineStyle

startArrowHead

private ArrowHead startArrowHead

endArrowHead

private ArrowHead endArrowHead

startLabel

private java.lang.String startLabel

middleLabel

private java.lang.String middleLabel

endLabel

private java.lang.String endLabel

label

private static javax.swing.JLabel label

Constructor Detail

SegmentedLineEdge

public SegmentedLineEdge()

Costructs an edge with no adornments.

Method Detail

setLineStyle

public void setLineStyle(LineStyle newValue)

Sets the line style property.

Parameters:

newValue - the new value

getLineStyle

public LineStyle getLineStyle()

Gets the line style property.

Returns:

the line style

setStartArrowHead

public void setStartArrowHead(ArrowHead newValue)

Sets the start arrow head property

Parameters:

newValue - the new value

getStartArrowHead

public ArrowHead getStartArrowHead()

Gets the start arrow head property

Returns:

the start arrow head style

setEndArrowHead

public void setEndArrowHead(ArrowHead newValue)

Sets the end arrow head property

Parameters:

newValue - the new value

getEndArrowHead

public ArrowHead getEndArrowHead()

Gets the end arrow head property

Returns:

the end arrow head style

setStartLabel

public void setStartLabel(java.lang.String newValue)

Sets the start label property

Parameters:

newValue - the new value

getStartLabel

public java.lang.String getStartLabel()

Gets the start label property

Returns:

the label at the start of the edge

setMiddleLabel

public void setMiddleLabel(java.lang.String newValue)

Sets the middle label property

Parameters:

newValue - the new value

getMiddleLabel

public java.lang.String getMiddleLabel()

Gets the middle label property

Returns:

the label at the middle of the edge

setEndLabel

public void setEndLabel(java.lang.String newValue)

Sets the end label property

Parameters:

newValue - the new value

getEndLabel

public java.lang.String getEndLabel()

Gets the end label property

Returns:

the label at the end of the edge

draw

public void draw(java.awt.Graphics2D g2)

Draws the edge.

Parameters:

g2 - the graphics context

drawString

private static void drawString(java.awt.Graphics2D g2,
                               java.awt.geom.Point2D p,
                               java.awt.geom.Point2D q,
                               ArrowHead arrow,
                               java.lang.String s,
                               boolean center)

Draws a string.

Parameters:

g2 - the graphics context

p - an endpoint of the segment along which to draw the string

q - the other endpoint of the segment along which to draw the string

s - the string to draw

center - true if the string should be centered along the segment

getAttachmentPoint

private static java.awt.geom.Point2D getAttachmentPoint(java.awt.Graphics2D g2,
                                                        java.awt.geom.Point2D p,
                                                        java.awt.geom.Point2D q,
                                                        ArrowHead arrow,
                                                        java.awt.Dimension d,
                                                        boolean center)

Computes the attachment point for drawing a string.

Parameters:

g2 - the graphics context

p - an endpoint of the segment along which to draw the string

q - the other endpoint of the segment along which to draw the string

d - the bounds of the string to draw

center - true if the string should be centered along the segment

Returns:

the point at which to draw the string

getStringBounds

private static java.awt.geom.Rectangle2D getStringBounds(java.awt.Graphics2D g2,
                                                         java.awt.geom.Point2D p,
                                                         java.awt.geom.Point2D q,
                                                         ArrowHead arrow,
                                                         java.lang.String s,
                                                         boolean center)

Computes the extent of a string that is drawn along a line segment.

Parameters:

g2 - the graphics context

p - an endpoint of the segment along which to draw the string

q - the other endpoint of the segment along which to draw the string

s - the string to draw

center - true if the string should be centered along the segment

Returns:

the rectangle enclosing the string

getBounds

public java.awt.geom.Rectangle2D getBounds(java.awt.Graphics2D g2)

Description copied from interface: Edge

Gets the smallest rectangle that bounds this edge. The bounding rectangle contains all labels.

Specified by:

getBounds in interface Edge

Overrides:

getBounds in class ShapeEdge

Returns:

the bounding rectangle

getShape

public java.awt.Shape getShape()

Description copied from class: ShapeEdge

Returns the path that should be stroked to draw this edge. The path does not include arrow tips or labels.

Specified by:

getShape in class ShapeEdge

Returns:

a path along the edge

getSegmentPath

private java.awt.geom.GeneralPath getSegmentPath()

getConnectionPoints

public java.awt.geom.Line2D getConnectionPoints()

Description copied from interface: Edge

Gets the points at which this edge is connected to its nodes.

Specified by:

getConnectionPoints in interface Edge

Overrides:

getConnectionPoints in class AbstractEdge

Returns:

a line joining the two connection points

getPoints

public abstract java.util.ArrayList getPoints()

Gets the corner points of this segmented line edge

Returns:

an array list of Point2D objects, containing the corner points