Cet afficheur est utilisé pour obtenir un affichage personnalisé de n'importe quel image supportée avec JAI/JIIO 1.1. Il s'implémente aisément dans n'importe quelle application awt/swing. Il dispose d'une capacité de redimensionnement avanée grace aux "transforms" Java2D.
C'est un composant JCSP actif.
b23:production GNU/GPL package installer du projet sf3jswing.
http://sourceforge.net/projects/sf3jswing/
Source / Exemple :
package installer;/*
*
- Created on 24 novembre 2006, 05:37
*
- To change this template, choose Tools | Template Manager
- and open the template in the editor.
- /
import com.sun.media.imageio.stream.FileChannelImageInputStream;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.lang.ref.PhantomReference;
import java.lang.ref.Reference;
import java.lang.ref.ReferenceQueue;
import java.net.URISyntaxException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.JComponent;
import jcsp.lang.CSProcess;
import jcsp.lang.Parallel;
/**
- This class allows to display an Image in a component that can be added to any Container.
- Component will be scaled to Image size to fit it.
- It is synchronized on the component with the MediaTracker.
- @see #mt
- @see Image
- @see MediaTracker
- @author www.b23prodtm.com
- /
public class Display extends JComponent {
/** the MediaTracker to manage full loading of the image data */
private MediaTracker mt;
/** the image to display */
private Image display;
/** phantom ref to image */
private PhantomReference phantomImage;
/** Transform instance to scale the image */
private AffineTransform tx;
/** background color
- @default Color.LIGHT_GRAY */
private Color background = Color.LIGHT_GRAY;
/***/
private Rectangle originalBox;
/***/
private BufferedImage bgImg;
/***/
private ReferenceQueue<? extends Reference> refQueue = new ReferenceQueue<Reference>();
/***/
public Display(String filename, AffineTransform tx) throws IOException {
this(ImageIO.read(
new FileChannelImageInputStream(
new RandomAccessFile(filename, "rws").getChannel()
)), tx);
}
/***/
public Display(URL filename, AffineTransform tx) throws IOException, URISyntaxException {
this(ImageIO.read(
new FileChannelImageInputStream(
new RandomAccessFile(new File(filename.toURI()), "rws").getChannel()
)), tx);
}
/***/
public Display(String filename, AffineTransform tx, Dimension size) throws IOException {
this(ImageIO.read(
new FileChannelImageInputStream(
new RandomAccessFile(filename, "rws").getChannel()
)), tx, size);
}
/***/
public Display(URL filename, AffineTransform tx, Dimension size) throws IOException, URISyntaxException {
this(ImageIO.read(
new FileChannelImageInputStream(
new RandomAccessFile(new File(filename.toURI()), "rws").getChannel()
)), tx, size);
}
/** the constructor of one Display
- @param display the image to display
- @param tx the transform to apply to the Display. if null, the component will fit the image size */
public Display(Image display, AffineTransform tx) {
super();
phantomImage = new PhantomReference(display, refQueue);
try {
bgImg = ImageIO.read(getClass().getResourceAsStream("images/duke.gif"));
mt = new MediaTracker(this);
this.display = display;
if(tx != null) {
this.tx = tx;
} else
this.tx = AffineTransform.getScaleInstance(1.0, 1.0);
originalBox = new Rectangle(0, 0, display.getWidth(this), display.getHeight(this));
setPreferredSize(originalBox.getBounds().getSize());
setSize(getPreferredSize());
validate();
repaint();
} catch (IOException ex) {
ex.printStackTrace();
}
}
/** the constructor of one Display
- @param display the image to display
- @param tx the transform to apply to the Display. if null, the component will fit the image size */
public Display(Image display, AffineTransform tx, Dimension size) {
super();
phantomImage = new PhantomReference(display, refQueue);
try {
bgImg = ImageIO.read(getClass().getResourceAsStream("images/duke.gif"));
mt = new MediaTracker(this);
this.display = display;
if(tx != null) {
this.tx = tx;
} else
this.tx = AffineTransform.getScaleInstance(1.0, 1.0);
originalBox = new Rectangle(0, 0, display.getWidth(this), display.getHeight(this));
setPreferredSize(size);
setSize(getPreferredSize());
repaint();
} catch (IOException ex) {
ex.printStackTrace();
}
}
/***/
public void finalize() {
try {
super.finalize();
} catch (Throwable ex) {
ex.printStackTrace();
} finally {
Reference ref;
while((ref = refQueue.poll()) instanceof Reference) {
ref.clear();
}
}
}
/** sets the background color
- @param color the background color to use*/
public void setBGColor(Color color) {
background = color;
}
/** returns the image displayed in this component
- @return the displayed picture*/
public Image getPicture() {
return display;
}
/***/
public void setTX(AffineTransform tx) {
this.tx = tx;
}
/***/
public AffineTransform getTX() {
return tx;
}
/** overriden to draw the image on the component graphics
- @param g1 the Graphics instance*/
public void paintComponent(Graphics g1) {
Graphics2D g = (Graphics2D)g1;
originalBox = new Rectangle(0, 0, display.getWidth(this), display.getHeight(this));
Rectangle box = this.tx.createTransformedShape(new Rectangle(0, 0, getWidth(), getHeight())).getBounds();
AffineTransform resizeTX = AffineTransform.getScaleInstance(
((double)((float)box.width)/((float)originalBox.width)),
((double)((float)box.height)/((float)originalBox.height))
);
g.setClip(box);
g.setBackground(background);
g.clearRect(box.x, box.y, box.width, box.height);
Composite cps = g.getComposite();
AffineTransform tx = AffineTransform.getScaleInstance(
((double)((float)box.width)/((float)bgImg.getWidth(this))),
((double)((float)box.height)/((float)bgImg.getWidth(this)))
);
mt.addImage(bgImg, bgImg.hashCode(), box.width, box.height);
mt.addImage(display, hashCode(), box.width, box.height);
try {
mt.waitForAll();
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.33f));
g.drawImage(bgImg, tx, this);
g.setComposite(cps);
g.drawImage(display, resizeTX, this);
super.paintComponent(g);
} catch (InterruptedException ex) {
ex.printStackTrace();
}
}
}
Conclusion :
Il y a une image de fond nommée images/duke.gif pour obtenir un fond personnalisé avec votre logo. Attention! le package JCSP doit être ajouté aux librairies de l'application pour compiler.
Annexe: JCSPclasses.zip
L'application Image Multi-Converter Ant utilise cet afficheur dans le sélecteur de fichiers intégré.
http://broumbroum84mirror3.ifrance.com/jnlp/demos/imc.jnlp
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