fdda.graphics.java2d
Class Point

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

All Implemented Interfaces:

Cloneable, Component

public class Point

extends Component

Represents a point on a line. The point appears as a small black rectangle; the coordinates are the middle point of this rectangle.

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

Point(double x, double y)
Default constructor.

Point(double x, double y, boolean selected)
Constructor

Method Summary

protected void	calcShape() Recalculates the shape.
void	draw(Graphics2D graphContext) Draws the component, using the given graphics.
Line	getLine() Returns the line that contains the point.
boolean	isMovable() Returns true.
void	move(double x, double y) Move the component (or its most prominent point).
int	selectableWith() Returns SEL_ALL.
void	setLine(Line line) Sets the line that contains the point.
Object	visit(ComponentVisitor visitor) Calls visitPoint according to visitor pattern.

Methods inherited from class fdda.graphics.java2d.Component

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

Methods inherited from class java.lang.Object

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

Constructor Detail

Point

public Point(double x,
             double y)

Default constructor. Point is not selected.

Parameters:

x - the x coordinate

y - the y coordinate

Point

public Point(double x,
             double y,
             boolean selected)

Constructor

Parameters:

x - the x coordinate

y - the y coordinate

selected - whether the point shall be selected

Method Detail

getLine

public Line getLine()

Returns the line that contains the point.

Returns:

the line

setLine

public void setLine(Line line)

Sets the line that contains the point.

Parameters:

line - the line

move

public void move(double x,
                 double y)

Description copied from interface: Component

Move the component (or its most prominent point).

Parameters:

x - offset for move in x direction

y - offset for move in y direction

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

isMovable

public boolean isMovable()

Returns true.

Returns:

true, iff the user can move the component

See Also:

Component.isMovable()

selectableWith

public int selectableWith()

Returns SEL_ALL.

Returns:

constant indicating the selection class

See Also:

Component.selectableWith()

visit

public Object visit(ComponentVisitor visitor)

Calls visitPoint according to visitor pattern.

Parameters:

visitor - the visitor

Returns:

specific to subclass

See Also:

Component.visit(fdda.graphics.ComponentVisitor)

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