code: public Point getPanelPos(int structure, int pos) {
  		Point p = new Point();
  
  		int lineNr = pos / DEFAULT_LINE_LENGTH;
  		int linePos = pos % DEFAULT_LINE_LENGTH;
  
  		int x = linePos * DEFAULT_CHAR_SIZE + DEFAULT_X_SPACE +
  				DEFAULT_LEGEND_SIZE;
  		int y = lineNr * DEFAULT_Y_STEP + DEFAULT_Y_SPACE;
  
  		y += DEFAULT_LINE_SEPARATION * structure;
  
  		p.setLocation(x, y);
  		return p;
  	}
docs: Get the X position on the Panel of a particular sequence position.
  
  @param structure index of the structure for the sequence position.
  @param pos sequence position, the aligned position index
  @return the point on a panel for a sequence position