Swing/GlyphVector のバックアップの現在との差分(No.9)

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class WrappedLabel extends JLabel {
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  private GlyphVector gvtext;
  private int width = -1;
  public WrappedLabel() {
    this(null);
  }

-&jnlp;
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  public WrappedLabel(String str) {
    super(str);
  }

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  @Override public void doLayout() {
    Insets i = getInsets();
    int w = getWidth() - i.left - i.right;
    if (w != width) {
      Font font = getFont();
      FontMetrics fm = getFontMetrics(font);
      FontRenderContext frc = fm.getFontRenderContext();
      gvtext = getWrappedGlyphVector(getText(), w, font, frc);
      width = w;
    }
    super.doLayout();
  }

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**サンプルコード [#b14ee862]
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private GlyphVector getWrappedGlyphVector(String str,
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                                          float wrapping,
                                          Font font,
                                          FontRenderContext frc) {
  Point2D gmPos    = new Point2D.Double(0.0d, 0.0d);
  GlyphVector gv   = font.createGlyphVector(frc, str);
  float lineheight = (float) (gv.getLogicalBounds().getHeight());
  float xpos       = 0.0f;
  float advance    = 0.0f;
  int   lineCount  = 0;
  GlyphMetrics gm;
  for(int i=0;i<gv.getNumGlyphs();i++) {
    gm = gv.getGlyphMetrics(i);
    advance = gm.getAdvance();
    if(xpos<wrapping && wrapping<=xpos+advance) {
      lineCount++;
      xpos = 0.0f;
  @Override protected void paintComponent(Graphics g) {
    if (gvtext == null) {
      super.paintComponent(g);
    } else {
      Insets i = getInsets();
      Graphics2D g2 = (Graphics2D) g.create();
      g2.setPaint(Color.RED);
      g2.drawGlyphVector(gvtext, i.left, getFont().getSize() + i.top);
      g2.dispose();
    }
    gmPos.setLocation(xpos, lineheight*lineCount);
    gv.setGlyphPosition(i, gmPos);
    xpos = xpos + advance;
  }
  return gv;
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}
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lbl2 = new JLabel() {
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  protected void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D)g;
    if(flg) {
      int wrap = lbl2.getWidth()
                 -lbl2.getInsets().left
                 -lbl2.getInsets().right;
      FontRenderContext frc = g2.getFontRenderContext();
      gvtext = getWrappedGlyphVector(str, wrap, lbl2.getFont(), frc);
      flg    = false;
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  private GlyphVector getWrappedGlyphVector(
      String str, float width, Font font, FontRenderContext frc) {
    Point2D gmPos = new Point2D.Double(0d, 0d);
    GlyphVector gv = font.createGlyphVector(frc, str);
    float lineheight = (float) (gv.getLogicalBounds().getHeight());
    float xpos = 0f;
    float advance = 0f;
    int lineCount = 0;
    GlyphMetrics gm;
    for (int i = 0; i < gv.getNumGlyphs(); i++) {
      gm = gv.getGlyphMetrics(i);
      advance = gm.getAdvance();
      if (xpos < width && width <= xpos + advance) {
        lineCount++;
        xpos = 0f;
      }
      gmPos.setLocation(xpos, lineheight * lineCount);
      gv.setGlyphPosition(i, gmPos);
      xpos = xpos + advance;
    }
    g2.setPaint(Color.RED);
    g2.drawGlyphVector(gvtext,
                       lbl2.getInsets().left,
                       lbl2.getInsets().top+lbl2.getFont().getSize());
   }
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};
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lbl2.addComponentListener(new ComponentAdapter() {
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  public void componentResized(ComponentEvent e) {
    flg = true;
    lbl2.repaint();
    return gv;
  }
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});
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}
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