/**
  * Set the show solution variable.
  *
  * @param b True if the solution should be shown
  */
 public void setShowSolution(boolean b) {
   showSolution = b;
   wrapper.invalidate();
 }
 /**
  * Set the show map variable.
  *
  * @param b True if the map should be shown
  */
 public void setMapMode(boolean b) {
   mapMode = b;
   wrapper.invalidate();
 }
 /**
  * Set the show maze variable.
  *
  * @param b True if the Maze walls should be shown
  */
 public void setShowMaze(boolean b) {
   showMaze = b;
   wrapper.invalidate();
 }