java - 带有换行符和制表符的 TextLayout

Question

我有一个JComponent，它使用Textlayout绘制多行属性字符串，运行得很好:

public static float drawMultiAttributedString(Graphics2D g2d, AttributedString str, String plainString, int maxWidth, int startX, float startY){

    FontRenderContext fontRenderCtx = g2d.getFontRenderContext();

    AttributedCharacterIterator attrCharIter = str.getIterator();
    LineBreakMeasurer lineBreakMeasurer = new LineBreakMeasurer(attrCharIter, fontRenderCtx);
    float x = startX;
    float y = startY;

    int next; 
    int limit; //länge bis zum nächsten umbruch
    int charat; 
    String tested = plainString;

    while (lineBreakMeasurer.getPosition() < attrCharIter.getEndIndex()) { 

          next = lineBreakMeasurer.nextOffset(maxWidth);
          limit = next;
          charat = tested.indexOf("\n", lineBreakMeasurer.getPosition()+1);
          if(next > (charat - lineBreakMeasurer.getPosition()) && charat != -1){
             limit = charat - lineBreakMeasurer.getPosition();
          }
          TextLayout layout = lineBreakMeasurer.nextLayout(maxWidth, lineBreakMeasurer.getPosition() + limit, false);

              y += layout.getAscent(); //höhe des haupttextes

          layout.draw(g2d, x, y);

          y += layout.getDescent() + layout.getLeading(); 
    }

    return y - startY;
}

问题是，Textlayout 不渲染我需要的制表符。有谁知道我如何也可以包括制表符？有什么想法吗？

非常感谢!

Answer 1

一个JTable使用一个或多个自定义渲染器可能是一种更简单的选择。 DefaultTableCellRenderer 扩展了 JLabel，它承认 HTML和特定于区域的 formatting .