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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.BleachImageFilter;
/**
* Initially displays an unbleached image. Subsequent mouse
* clicks in the canvas containing the image toggle between
* a bleached version of the image and an unbleached version.<p>
*
* @version 1.0, Apr 1 1996
* @author David Geary
* @see gjt.test.UnitTest
* @see gjt.image.BleachImageFilter
*/
public class BleachImageFilterTest extends UnitTest {
public String title() {
return "BleachImageFilter Test " +
"(Click below to Bleach/Unbleach Picture)";
}
public Panel centerPanel() {
return new BleachImageFilterTestPanel(this);
}
}
class BleachImageFilterTestPanel extends Panel {
BleachImageFilterTestCanvas canvas;
public BleachImageFilterTestPanel(Applet applet) {
add(canvas = new BleachImageFilterTestCanvas(applet));
}
public boolean mouseDown(Event event, int x, int y) {
canvas.toggleBleaching();
canvas.repaint();
return true;
}
}
class BleachImageFilterTestCanvas extends Canvas {
private Image im;
private Image bleached;
private boolean showingBleached = false;
public BleachImageFilterTestCanvas(Applet applet) {
int bp;
String bleachPercent =
applet.getParameter("bleachPercent");
if(bleachPercent != null)
bp = new Integer(bleachPercent).intValue();
else
bp = 50;
im = applet.getImage(applet.getCodeBase(),
"gifs/saint.gif");
Util.waitForImage(this, im);
FilteredImageSource source =
new FilteredImageSource(im.getSource(),
new BleachImageFilter(bp));
bleached = createImage(source);
Util.waitForImage(this, bleached);
showImageSize();
}
public Dimension preferredSize() {
return new Dimension(im.getWidth(this),
im.getHeight(this));
}
public void paint(Graphics g) {
if(showingBleached) g.drawImage(bleached,0,0,this);
else g.drawImage(im, 0,0,this);
}
public void toggleBleaching() {
showingBleached = showingBleached ? false : true;
}
private void showImageSize() {
System.out.print ("Image width=" + im.getWidth(this));
System.out.println(" height=" + im.getHeight(this));
}
}
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