Exemple #1
0
  /**
   * Draw the line numbers
   *
   * @param g
   */
  @Override
  public void paintComponent(Graphics g) {
    super.paintComponent(g);

    ((Graphics2D) g)
        .setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    //	Determine the width of the space available to draw the line number

    FontMetrics fontMetrics = component.getFontMetrics(component.getFont());
    Insets insets = getInsets();
    int availableWidth = getSize().width - insets.left - insets.right;

    //  Determine the rows to draw within the clipped bounds.

    Rectangle clip = g.getClipBounds();
    int rowStartOffset = component.viewToModel(new Point(0, clip.y));
    int endOffset = component.viewToModel(new Point(0, clip.y + clip.height));

    while (rowStartOffset <= endOffset) {
      try {
        if (isCurrentLine(rowStartOffset)) g.setColor(getCurrentLineForeground());
        else g.setColor(getForeground());

        //  Get the line number as a string and then determine the
        //  "X" and "Y" offsets for drawing the string.

        String lineNumber = getTextLineNumber(rowStartOffset);
        int stringWidth = fontMetrics.stringWidth(lineNumber);
        int x = getOffsetX(availableWidth, stringWidth) + insets.left;
        int y = getOffsetY(rowStartOffset, fontMetrics);
        g.drawString(lineNumber, x, y);

        //  Move to the next row

        rowStartOffset = Utilities.getRowEnd(component, rowStartOffset) + 1;
      } catch (Exception e) {
        break;
      }
    }
  }
Exemple #2
0
 private int getTextWidth(String text) {
   return fmRef.stringWidth(text);
 }