hu.kazocsaba.imageviewer

Class PixelModel

java.lang.Object

hu.kazocsaba.imageviewer.PixelModel

public class PixelModel
extends Object

Stores the x and y coordinate of a pixel. Either both coordinate is positive or zero, indicating a valid pixel, or both are -1, indicating no pixel is selected or should be shown.

Author:

Kazó Csaba

Constructor Summary

Constructors

Constructor and Description
PixelModel()

Method Summary

Methods

Modifier and Type	Method and Description
void	addChangeListener(ChangeListener listener) Adds a ChangeListener to the model.
protected void	fireChange() Notifies the registered listeners that the model has changed.
int	getX() Returns the current x coordinate.
int	getY() Returns the current y coordinate.
boolean	isInvalid() Returns whether the pixel is marked as invalid by setting one of the coordinates to -1.
void	removeChangeListener(ChangeListener listener) Removes a ChangeListener from the model.
void	set(int x, int y) Changes the pixel stored in this model.

Methods inherited from class java.lang.Object

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

Constructor Detail

PixelModel

public PixelModel()

Method Detail

addChangeListener

public void addChangeListener(ChangeListener listener)

Adds a ChangeListener to the model.

Parameters:

listener - the listener to add

removeChangeListener

public void removeChangeListener(ChangeListener listener)

Removes a ChangeListener from the model.

Parameters:

listener - the listener to remove

fireChange

protected void fireChange()

Notifies the registered listeners that the model has changed.

set

public void set(int x,
       int y)

Changes the pixel stored in this model. If either coordinate is negative, the new value of the model will be (-1, -1).

Parameters:

x - the new x coordinate

y - the new y coordinate

getX

public int getX()

Returns the current x coordinate.

Returns:

the x coordinate

getY

public int getY()

Returns the current y coordinate.

Returns:

the y coordinate

isInvalid

public boolean isInvalid()

Returns whether the pixel is marked as invalid by setting one of the coordinates to -1.

Returns:

true if the model does not have a valid pixel