Region_B

package csc143.sudoku;

import javax.swing.*;
import csc143.sudoku.*;
import java.awt.*;
import java.awt.event.*;

/**
 * @author Vita Wiebe
 * @version Feb. 24, 2019
 */

/**
 * Designs a JPanel-type object representing a "region" of the Sudoku board.
 * Is used to regulate the shading schemata of the final SudokuBoard object.
 */
public class Region extends JPanel {

   // A field to hold a Cell instance while populating Region.
   private Cell cell;

   // Our class fields.
   private int rows;
   private int columns;
   private int size;

   private SudokuBase b;

   /** Our class constructor.  Designs a Region object of Cells, which will in turn be
    * added to the board to make the overarching schemata of our SudokuBoard.
    * @param Cell cell.
    */
   public Region(SudokuStub b) {

      // Gets the number of rows and columns from the SudokuBase/Stub object.
      rows = b.getRows();
      columns = b.getColumns();
      size = b.getSize();

      // Instantiate b, our SudokuStub/Base/Core object.
      this.b = new SudokuStub(rows, columns);
      GridLayout myLayout = new GridLayout(this.rows, this.columns, 0, 0);
      setLayout(myLayout);

      for (int row = 0; row < rows; row++) {

         for (int col = 0; col < columns; col++) {

            this.add(createCell(row, col), row, col);
         }
      }
   }

   private Cell createCell(int row, int col) {

      // make new cell, add to region/board.
      // (row, col) passed to (row, column) give each Cell instance its own "address" on the board.
      Cell cell = new Cell(row, col);
      cell.addMouseListener(new MouseAdapter()
      {
         @Override
         public void mouseClicked(MouseEvent click) {
            cell.setOpaque(!cell.isOpaque());
            cell.setBackground(Color.YELLOW);
            //Cell selected = cell.setSelected(row, col);
            repaint();
         }
         @Override
         public void mouseEntered(MouseEvent entered) {
            setBackground(Color.CYAN);
            repaint();
         }
         @Override
         public void mouseExited(MouseEvent exited) {
            setBackground(null);
            //repaint();
         }
      });
      return cell;
    }
}