fdda.graphics.java2d
Class LineSegment

java.lang.Object
  |
  +--fdda.graphics.java2d.Component
        |
        +--fdda.graphics.java2d.LineSegment

All Implemented Interfaces:

Cloneable, Component

public class LineSegment

extends Component

A LineSegment is a segment of a line, bordered either by a point or by a node. The coordinates are the coordinates of the start point.

Author:

Jörg Rüdenauer

Field Summary

Fields inherited from class fdda.graphics.java2d.Component

COLOR_NORMAL, COLOR_SELECTED, dirtyShape, selected, shape, x, y

Fields inherited from interface fdda.graphics.Component

SEL_ALL, SEL_EQUALS, SEL_MOVABLES, SEL_NOTHING

Constructor Summary

LineSegment(double startX, double startY, double endX, double endY)
Constructor

Method Summary

protected void	calcShape() Recalculates the shape.
Object	clone() Clones the component
void	draw(Graphics2D graphContext) Draws the component, using the given graphics.
double	getEndX() Returns the x coordinate of the end point
double	getEndY() Returns the y coordinate of the end point
double	getLength() Returns the length of the segment
boolean	isMovable() Returns false.
void	move(double x, double y) Moves both start and end point.
void	moveIn(double x, double y) Moves the start point.
void	moveOut(double x, double y) Moves the end point.
int	selectableWith() Returns SEL_EQUALS
void	setEndXY(double x, double y) Resets the end point.
void	setXY(double x, double y) Sets the coordinates of the component (or of its most prominent point).
Object	visit(ComponentVisitor visitor) Calls visitLineSegment according to visitor pattern.

Methods inherited from class fdda.graphics.java2d.Component

deselect, getGraphicalSystem, getShape, getX, getY, isSelected, recalculateShape, select, setGraphicalSystem

Methods inherited from class java.lang.Object

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

Constructor Detail

LineSegment

public LineSegment(double startX,
                   double startY,
                   double endX,
                   double endY)

Constructor

Parameters:

startX - x coordinate of start point

startY - y coordinate of start point

endX - x coordinate of end point

endY - y coordinate of end point

Method Detail

clone

public Object clone()

Description copied from interface: Component

Clones the component

Specified by:

clone in interface Component

Overrides:

clone in class Component

Returns:

the clone

draw

public void draw(Graphics2D graphContext)

Description copied from class: Component

Draws the component, using the given graphics. The graphics should have the same attributes (color, pen, etc.) after the call as before the call.

Specified by:

draw in class Component

Parameters:

graphContext - the graphics

getEndX

public double getEndX()

Returns the x coordinate of the end point

Returns:

the x coordinate of the end point

getEndY

public double getEndY()

Returns the y coordinate of the end point

Returns:

the y coordinate of the end point

getLength

public double getLength()

Returns the length of the segment

Returns:

the length of the segment

move

public void move(double x,
                 double y)

Moves both start and end point.

Parameters:

x - offset for move in x direction

y - offset for move in y direction

See Also:

Component.move(double, double)

moveIn

public void moveIn(double x,
                   double y)

Moves the start point.

Parameters:

x - offset for x coordinate

y - offset for y coordinate

moveOut

public void moveOut(double x,
                    double y)

Moves the end point.

Parameters:

x - offset for x coordinate

y - offset for y coordinate

setXY

public void setXY(double x,
                  double y)

Description copied from interface: Component

Sets the coordinates of the component (or of its most prominent point).

Specified by:

setXY in interface Component

Overrides:

setXY in class Component

Parameters:

x - the x coordinate

y - the y coordinate

setEndXY

public void setEndXY(double x,
                     double y)

Resets the end point.

Parameters:

x - the new x coordinate of the end point

y - the new y coordinate of the end point

calcShape

protected void calcShape()

Description copied from class: Component

Recalculates the shape. Is called by getShape if the flag dirtyShape is set. Must unset the flag after calculation.

Specified by:

calcShape in class Component

isMovable

public boolean isMovable()

Returns false.

Returns:

true, iff the user can move the component

See Also:

Component.isMovable()

selectableWith

public int selectableWith()

Returns SEL_EQUALS

Returns:

constant indicating the selection class

See Also:

Component.selectableWith()

visit

public Object visit(ComponentVisitor visitor)

Calls visitLineSegment according to visitor pattern.

Parameters:

visitor - the visitor

Returns:

specific to subclass

See Also:

Component.visit(fdda.graphics.ComponentVisitor)