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package gjt.test;
import java.applet.Applet;
import java.awt.*;
import java.awt.image.FilteredImageSource;
import gjt.Util;
import gjt.image.ImageDissolver;
/**
* Initially displays an image. Subsequent mouse clicks in the
* canvas containing the image cause the image to fade in or
* fade out, depending upon it's current state.<p>
*
* @version 1.0, Apr 1 1996
* @author David Geary
* @see gjt.test.UnitTest
* @see gjt.image.DissolveFilter
* @see gjt.image.ImageDissolver
*/
public class ImageDissolverTest extends UnitTest {
public String title() {
return "ImageDissolver Test " +
"(Click Below to Fade Picture In/Out)";
}
public Panel centerPanel() {
return new ImageDissolverTestPanel(this);
}
}
class ImageDissolverTestPanel extends Panel {
ImageDissolverTestCanvas canvas;
public ImageDissolverTestPanel(Applet applet) {
add(canvas = new ImageDissolverTestCanvas(applet));
}
public boolean mouseDown(Event event, int x, int y) {
canvas.doFade();
return true;
}
}
class ImageDissolverTestCanvas extends Canvas {
private boolean isFaded = false;
private Image image;
private ImageDissolver dissolver;
public ImageDissolverTestCanvas(Applet applet) {
image =
applet.getImage(applet.getCodeBase(),"gifs/saint.gif");
Util.waitForImage(this, image);
dissolver = new ImageDissolver(this, image);
}
public void paint(Graphics g) {
if( ! isFaded)
g.drawImage(image, 0, 0, this);
}
public Dimension preferredSize() {
return new Dimension(image.getWidth(this),
image.getHeight(this));
}
public void doFade() {
if(isFaded) dissolver.fadeIn (0,0);
else dissolver.fadeOut(0,0);
isFaded = isFaded ? false : true;
}
}
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