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package gjt;
import java.awt.Image;
/**
* An ImageButton that cycles through a series of images. The
* image advances to the next image in the series every time
* the button is activated.<p>
*
* Note that the cycling is actually performed by the buttons'
* controller - a StateButtonController.<p>
*
* @version 1.0, Apr 1 1996
* @author David Geary
* @see ImageButton
* @see StateButtonController
* @see gjt.test.StateButtonTest
*/
public class StateButton extends ImageButton {
private Image[] images;
private int state = 0;
private int numStates;
public StateButton(Image[] images) {
super(images[0]);
this.images = images;
numStates = images.length;
setController(new StateButtonController(this));
waitForImages();
}
public Image nextImage() {
if(state + 1 < numStates) state++;
else state = 0;
return images[state];
}
public int state() {
return state;
}
private void waitForImages() {
for(int i=0; i < images.length; ++i)
Util.waitForImage(this, images[i]);
}
}
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