edu.kzoo.grid.display

Class ScaledImageDisplay

java.lang.Object

edu.kzoo.grid.display.ScaledDisplay

edu.kzoo.grid.display.ScaledImageDisplay

All Implemented Interfaces:

GridObjectDisplay

Direct Known Subclasses:

PictureBlockDisplay

public class ScaledImageDisplay
extends ScaledDisplay

Grid Display Package:
A ScaledImageDisplay uses an image read from a file to represent an object in a location in a grid. Images can be rotated or tinted using appropriate decorators. ScaledImageDisplay provides a tint method that can be used by a tint decorator.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ScaledImageDisplay() Internal constructor that does not initialize the icon instance variable; subclasses must be sure to set the icon using the setIcon method (e.g., at the beginning of a redefined draw method).
	ScaledImageDisplay(java.lang.String imageFilename) Constructs an object that knows how to display a GridObject object as an image.

Method Summary

Modifier and Type	Method and Description
void	draw(GridObject obj, java.awt.Component comp, java.awt.Graphics2D g2) Draws a unit-length object using an image.
protected javax.swing.ImageIcon	getIcon() Returns the image to use for display purposes.
boolean	imageLoadedOK() Returns true if the image loaded OK; false otherwise.
protected void	setIcon(javax.swing.ImageIcon icon) Defines the image to use for display purposes.

Methods inherited from class edu.kzoo.grid.display.ScaledDisplay

addDecorator, adjust, draw, removeDecorator

Methods inherited from class java.lang.Object

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

Constructor Detail

ScaledImageDisplay

protected ScaledImageDisplay()

Internal constructor that does not initialize the icon instance variable; subclasses must be sure to set the icon using the setIcon method (e.g., at the beginning of a redefined draw method).

ScaledImageDisplay

public ScaledImageDisplay(java.lang.String imageFilename)

Constructs an object that knows how to display a GridObject object as an image. The imageFilename parameter may name a file in the jar file, may be the absolute name of a file in the current file system, or may be the name of a file in the current directory.

Parameters:

imageFilename - name of file containing image

Method Detail

imageLoadedOK

public boolean imageLoadedOK()

Returns true if the image loaded OK; false otherwise.

setIcon

protected void setIcon(javax.swing.ImageIcon icon)

Defines the image to use for display purposes.

getIcon

protected javax.swing.ImageIcon getIcon()

Returns the image to use for display purposes.

draw

public void draw(GridObject obj,
                 java.awt.Component comp,
                 java.awt.Graphics2D g2)

Draws a unit-length object using an image. This implementation draws the object by scaling the image provided to the constructor. If the named file is not found or the file is malformed, the display will fall back to the DefaultDisplay class.

Specified by:

draw in class ScaledDisplay

Parameters:

obj - object we want to draw

comp - the component we're drawing on

g2 - drawing surface