Swing/AnimeIcon のバックアップの現在との差分(No.7)

解説

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class AnimeIcon2 implements Icon, Serializable {
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  private static final long serialVersionUID = 1L;
  private static final Color ELLIPSE_COLOR = new Color(.5f, .8f, .5f);
  private final List<Shape> list = new ArrayList<>();
  private final Dimension dim;
  private boolean isRunning = false;
  public AnimeIcon() {
  private boolean isRunning;
  public AnimeIcon2() {
    super();
    double r  = 2.0d;
    double sx = 1.0d;
    double sy = 1.0d;
    list.addElement(new Ellipse2D.Double(sx+3*r, sy+0*r, 2*r, 2*r));
    list.addElement(new Ellipse2D.Double(sx+5*r, sy+1*r, 2*r, 2*r));
    list.addElement(new Ellipse2D.Double(sx+6*r, sy+3*r, 2*r, 2*r));
    list.addElement(new Ellipse2D.Double(sx+5*r, sy+5*r, 2*r, 2*r));
    list.addElement(new Ellipse2D.Double(sx+3*r, sy+6*r, 2*r, 2*r));
    list.addElement(new Ellipse2D.Double(sx+1*r, sy+5*r, 2*r, 2*r));
    list.addElement(new Ellipse2D.Double(sx+0*r, sy+3*r, 2*r, 2*r));
    list.addElement(new Ellipse2D.Double(sx+1*r, sy+1*r, 2*r, 2*r));
    dim = new Dimension((int)(r*8+sx*2), (int)(r*8+sy*2));
    int r = 4;
    Shape s = new Ellipse2D.Float(0, 0, 2 * r, 2 * r);
    for (int i = 0; i < 8; i++) {
      AffineTransform at = AffineTransform.getRotateInstance(
          i * 2 * Math.PI / 8);
      at.concatenate(AffineTransform.getTranslateInstance(r, r));
      list.add(at.createTransformedShape(s));
    }
    // int d = (int) (r * 2*(1 + 2 * Math.sqrt(2)));
    int d = (int) r * 2 * (1 + 3); // 2 * Math.sqrt(2) is nearly equal to 3.
    dim = new Dimension(d, d);
  }
  public int getIconWidth() {
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  @Override public int getIconWidth() {
    return dim.width;
  }
  public int getIconHeight() {
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  @Override public int getIconHeight() {
    return dim.height;
  }
  public void paintIcon(Component c, Graphics g, int x, int y) {
    Graphics2D g2d = (Graphics2D) g;
    g2d.setPaint((c!=null)?c.getBackground():Color.WHITE);
    g2d.fillRect(x, y, getIconWidth(), getIconHeight());
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                         RenderingHints.VALUE_ANTIALIAS_ON);
    g2d.setColor(cColor);
    float alpha = 0.0f;
    g2d.translate(x, y);
    for(Shape s: list) {
      alpha = isRunning?alpha+0.1f:0.5f;
      g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha));
      g2d.fill(s);
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  @Override public void paintIcon(Component c, Graphics g, int x, int y) {
    Graphics2D g2 = (Graphics2D) g.create();
    g2.setPaint(c == null ? Color.WHITE : c.getBackground());
    g2.fillRect(x, y, getIconWidth(), getIconHeight());
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);
    g2.setColor(ELLIPSE_COLOR);
    int xx = x + dim.width / 2;
    int yy = y + dim.height / 2;
    g2.translate(xx, yy);
    int size = list.size();
    for (int i = 0; i < size; i++) {
      float alpha = isRunning ? (i + 1) / (float) size : .5f;
      g2.setComposite(AlphaComposite.getInstance(
          AlphaComposite.SRC_OVER, alpha));
      g2.fill(list.get(i));
    }
    g2d.translate(-x, -y);
    // g2.translate(-xx, -yy);
    g2.dispose();
  }
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  public void next() {
    if(isRunning) list.addElement(list.remove(0));
    if (isRunning) {
      list.add(list.remove(0));
    }
  }
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  public void setRunning(boolean isRunning) {
    this.isRunning = isRunning;
  }
}

• &jnlp;
• &jar;
• &zip;

• Icon (Java Platform SE 8)

• アイコンの生成
  • リスト(Vector)に、座標の異なる円(Ellipse2D.Double)を8個生成して追加します。
• インデックスの変更
  • Timerを使って、リストの先頭にある円を最後に移動します。
• 異なるアルファ値で円を描画
  • インデックスに応じたアルファ値でそれぞれの円を描画します。

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