Botão Animado em LWUIT - Ginga | Thiago Galbiatti Vespa

Atendendo a pedidos, segue o código do componente para animação de botões para LWUIT - Ginga-J.
package org.gvlabs.sbtvd.ui;
 
import com.sun.dtv.lwuit.Button;
import com.sun.dtv.lwuit.Graphics;
import com.sun.dtv.lwuit.Image;
 
/**
 * Animated Button
 *
 * @author Thiago Galbiatti Vespa
 * @version 1.0
 */
public class AnimatedButton extends Button {
    private int speed = 50;
 
    private Image[] animaImgs;
 
    private int currentImage = 0;
    private long lastInvoke;
    private boolean forward = true;
    private boolean backAndForth = true;
    private boolean loop = true;
    private boolean disableLoop = false;
 
    /**
     * Default constructor
     */
    public AnimatedButton() {
    }
 
    /**
     * Get array of images
     * @return array of images
     */
    public Image[] getAnimaImgs() {
        return animaImgs;
    }
 
    /**
     * Set array of images to be animated
     * @param animaImgs array of images
     */
    public void setAnimaImgs(Image[] animaImgs) {
        this.animaImgs = animaImgs;
        if (animaImgs != null && animaImgs.length > 0) {
            this.setIcon(animaImgs[0]);
        }
    }
 
    /**
     * Get animation speed is ms
     * @return animation speed
     */
    public int getSpeed() {
        return speed;
    }
 
    /**
     * Set animation speed in ms
     * @param speed animation speed
     */
    public void setSpeed(int speed) {
        this.speed = speed;
    }
 
    /**
     * Back and Forth animation
     * @return true if is a back and forth animation
     */
    public boolean isBackAndForth() {
        return backAndForth;
    }
 
    /**
     * Set back and forth animation value
     * @param backAndForth
     */
    public void setBackAndForth(boolean backAndForth) {
        this.backAndForth = backAndForth;
    }
 
    /**
     * Is loop?
     * @return true if is a loop animation
     */
    public boolean isLoop() {
        return loop;
    }
 
    /**
     * true = loop, false = one animation
     * @param loop
     */
    public void setLoop(boolean loop) {
        this.loop = loop;
    }
 
    public boolean animate() {
        if (disableLoop)
            return false;
        long current = System.currentTimeMillis();
        if (current - lastInvoke > speed) {
            lastInvoke = current;
            if (forward) {
                currentImage++;
            } else {
                currentImage--;
            }
            if (currentImage >= animaImgs.length) {
                if (!loop) {
                    disableLoop = true;
                    return false;
                } else if (!backAndForth) {
                    forward = true;
                    currentImage = 0;
                } else {
                    forward = false;
                    currentImage = animaImgs.length - 1;
                }
            } else if (currentImage < 0) {
                forward = true;
                currentImage = 0;
            }
            return true;
        }
        return false;
    }
 
    /* (non-Javadoc)
     * @see com.sun.dtv.lwuit.Button#paint(com.sun.dtv.lwuit.Graphics)
     */
    public void paint(Graphics g) {
        g.drawImage(animaImgs[currentImage], getX(), getY());
    }
 
}
Para utilizar é só atribuir o conjunto de imagens para o método setAnimaImgs e registrar a animação no formulário, por exemplo: form.registerAnimation(animatedButton);
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Sobre: Thiago Galbiatti Vespa

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