Listing 1.  Creating a QCanvas and a QCanvasView

// This is the constructor for Snake.
SnakeGame::SnakeGame(QWidget* parent,

  QMainWindow(parent,name,f),
  canvas(232, 258)
{
  // create a canvas view
  cv = new QCanvasView(&canvas, this);
  // create a toolbar and put a new game button on it
  QToolBar* toolbar = new QToolBar( this);
  QToolButton* newgame = new QToolButton(newicon,
  
        SLOT(newGame()), toolbar,"New Game");
  // set the canvasview to appear in the center of
  // the window
  setCentralWidget(cv);
}