Class CellHandler

Programs/Games/peg-solitaire/PegSolitaire.java:960–1068

Inner class CellHandler that implements ActionListener

	/** Inner class CellHandler that implements ActionListener */
	private class CellHandler implements ActionListener{
		int row;
		int col;
		boolean flag;
		
		/** 
		 * Constructor of inner class with row and column values. 
		 * Assign row, col to given parameters and flag to false.
		 */
		public CellHandler(int rowVal, int colVal){
			row = rowVal; col = colVal; flag = false;
		}
		
		/** 
		 * actionPerformed method, invoked when an action occurs.
		 * @param event Indicates an action.
		 */
		public void actionPerformed(ActionEvent event){
			//IF USER FIRST CLICK BLACK CELL
			//toggle becomes true, selected cell becomse yellow
			if (board[row][col].getBackground() == Color.BLACK && !toggle){
				toggle = true;
				board[row][col].setBackground(Color.YELLOW);
			}

			//IF USER CLICK ANY OTHER CELL AFTER CLICKING ONE BLACK CELL
			else if (toggle){
				//Finding user's first selected row
				int tempRow=0, tempCol=0;
				for (int i = 0; i < board.length; ++i)
					for (int j = 0; j < board.length; ++j)
						if (board[i][j].getBackground() == Color.YELLOW){tempRow = i; tempCol = j; break;}
				int yRow = tempRow, yCol = tempCol;

				//If user clicks another black cell, make it yellow, make former one black again
				if (board[row][col].getBackground() == Color.BLACK){ 
					board[row][col].setBackground(Color.YELLOW);
					board[yRow][yCol].setBackground(Color.BLACK);
				}
				
				//If user clicks yellow cell again, make it black and make toggle false.
				else if (board[row][col].getBackground() == Color.YELLOW){ board[row][col].setBackground(Color.BLACK); toggle = false; }
				
				//If user clicks gray cell (empty slot), check if move is valid
				else if (board[row][col].getBackground() == Color.GRAY) {
					//CHECK UP
					if (is_valid_up(yRow, yCol, row, col)){	//UP-RIGHT FOR BOARD 6
						board[yRow][yCol].setBackground(Color.GRAY);
						board[row+1][col].setBackground(Color.GRAY);
						board[row][col].setBackground(Color.BLACK);
						toggle = false;
						flag = true;
						moves.add(yRow*100+yCol*10+0);
					}
					//CHECK DOWN
					else if(is_valid_down(yRow, yCol, row, col)){ //DOWN-LEFT FOR BOARD 6
						board[yRow][yCol].setBackground(Color.GRAY);
						board[row-1][col].setBackground(Color.GRAY);