Splitting GUI from Code

Question

Hi, I created a Tetris game and I didn't split GUI from code.
but since I'm trying to learn from this I would like to split it.
so I created 3 JPanels a controller and a JFrame in different classes.
I think this is the best solution?
now I have for example this piece of code in my Canvas TetrisBoard .paint method
wich draws a TetrisBoard on the screen.
  public void paint(Graphics2D g) {
    Color color;
    for(int row = 0 ; row < rows ; row++)
      for(int col = 0 ; col < cols ; col++) {
        /* Get The Color for the current Position */
        switch(board[ row ][ col ]) {
          case Block.T_Block: color = Block.T_COLOR; break;
          case Block.I_Block: color = Block.I_COLOR; break;
          case Block.J_Block: color = Block.J_COLOR; break;
          case Block.L_Block: color = Block.L_COLOR; break;
          case Block.O_Block: color = Block.O_COLOR; break;
          case Block.S_Block: color = Block.S_COLOR; break;
          case Block.Z_Block: color = Block.Z_COLOR; break;
          default:color = Color.GRAY;
        g.setColor(color);
        /* Fill & Draw the rectangle with the given color from above. */
        g.fillRect(col*Block.TILE_SIZE, row*Block.TILE_SIZE, Block.TILE_SIZE,Block.TILE_SIZE);
        g.setColor(g.getColor().darker());
        g.drawRect(col*Block.TILE_SIZE, row*Block.TILE_SIZE, Block.TILE_SIZE,Block.TILE_SIZE);
}How do I transfer this to my JPanel, controller class?
The JPanel classes should they know about the board, or should they only containt the g.drawRect method. or something like this drawBoard(color, board, tile_size)
so in general should the JPanel, controller classes contain any code not related to drawing. (KeyListeners, looping arrays...)
Message was edited by:
stef569

Answer 1

You might want to have a look at implementations of the Model-view-controller (MVC) pattern as this may be a decent way to separate things out. Some reference sources include:
http://en.wikipedia.org/wiki/Model-view-controller
http://www.cs.cmu.edu/~pattis/15-1XX/15-200/lectures/modelinmvc/index.html
http://www.stanford.edu/class/cs106a/handouts/43-mvc-example.pdf
Also, I'm not sure about how to answer your specific question without looking at your code. It'd be great if you could post it, but this may not be feasible if it is large.