Added highlighting function

Author: Programmerryoki

src/controller/SudokuController.java

@@ -1,5 +1,6 @@
 package controller;
 
+import java.awt.Color;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 
@@ -26,14 +27,15 @@ public SudokuController(Sudoku model, MasterController master)
 		this.master = master;
 		this.setView(new SudokuView(this));
 		view.fixGridNumbers(model.getOriginal());
+		view.resetColor();
 	}
 
 	@Override
 	/**
-	 * If the action starts with grid, changes the grid at that position to 
+	 * If the action starts with "Grid", changes the grid at that position to 
 	 * selected number
 	 * 
-	 * If the action is Check, it will check if the grid is solved or not
+	 * If the action is "Check", it will check if the grid is solved or not
 	 */
 	public void actionPerformed(ActionEvent e)
 	{
@@ -43,7 +45,10 @@ public void actionPerformed(ActionEvent e)
 			int i = action.charAt(4) - '0';
 			int j = action.charAt(5) - '0';
 			if (view.getSelectedNumber() != 0)
+			{
 				view.setGridAt(i, j, "" + view.getSelectedNumber());
+				view.changeColor(Color.yellow, view.getSelectedNumber());
+			}
 			else
 				view.setGridAt(i, j, "");
 		}
@@ -55,6 +60,13 @@ else if (action.equals("Check"))
 			else
 				JOptionPane.showMessageDialog(null, "It is Wrong");
 		}
+		else if (action.substring(0, 5).equals("Radio"))
+		{
+			view.resetColor();
+			int val = action.charAt(6) - '0';
+			if (val != 0)
+				view.changeColor(Color.yellow, val);
+		}
 	}
 
 	/**

src/view/SudokuView.java

@@ -29,8 +29,10 @@ public SudokuView(ActionListener controller)
 	{
 		setLayout(new BorderLayout());
 
+		//************************
+		// Created the Sudoku grid
+		//************************
 		JPanel sudoGrids = new JPanel();
-//		sudoGrids.setPreferredSize(new Dimension(100,100));
 		sudoGrids.setLayout(new GridLayout(9,9,0,0));
 		sudoGrids.setBorder(BorderFactory.createTitledBorder("Sudoku"));
 
@@ -51,13 +53,13 @@ public SudokuView(ActionListener controller)
 				if (j == 8)
 					b[3] = 0;
 				if (i == 3 || i == 6)
-					b[0] = 2;
+					b[0] = 3;
 				if (j == 3 || j == 6)
-					b[1] = 2;
+					b[1] = 3;
 				if (i == 2 || i == 5)
-					b[2] = 2;
+					b[2] = 3;
 				if (j == 2 || j == 5)
-					b[3] = 2;
+					b[3] = 3;
 				grid.setBorder(BorderFactory.createMatteBorder(b[0], b[1], b[2], b[3], Color.black));
 				grid.setActionCommand("Grid"+i+j);
 				grid.addActionListener(controller);
@@ -69,6 +71,9 @@ public SudokuView(ActionListener controller)
 
 		add(sudoGrids, BorderLayout.CENTER);
 
+		//*********************
+		// Radio Button Created
+		//*********************
 		noBtn = new JRadioButton[10];
 		JPanel radios = new JPanel();
 		radios.setLayout(new GridLayout(10,1));
@@ -81,19 +86,19 @@ public SudokuView(ActionListener controller)
 				radioBtn.setText("Empty");
 				radioBtn.setSelected(true);
 			}
+			radioBtn.addActionListener(controller);
 			radioBtn.setMnemonic(KeyEvent.VK_0 + i);
+			radioBtn.setActionCommand("Radio " + i);
 			noBtnGroup.add(radioBtn);
 			radios.add(radioBtn);
 			noBtn[i] = radioBtn;
 		}
 		add(radios, BorderLayout.EAST);
 
+		//****************
+		// Button to Check
+		//****************
 		JPanel buttonsP = new JPanel();
-		JButton saveBtn = new JButton();
-		saveBtn.setText("Save");
-		saveBtn.setActionCommand("Save");
-		saveBtn.addActionListener(controller);
-		buttonsP.add(saveBtn);
 
 		JButton checkBtn = new JButton();
 		checkBtn.setText("Check");
@@ -210,6 +215,37 @@ public int getSelectedNumber()
 		return 0;
 	}
 
+	/**
+	 * Change the color of cell which has the given value
+	 * @param color The color of the cell
+	 * @param val The value to check
+	 */
+	public void changeColor(Color color, int val)
+	{
+		for (int i = 0; i < 9; i++)
+		{
+			for (int j = 0; j < 9; j++)
+			{
+				if (grids[i][j].getText().equals(""+val))
+					grids[i][j].setBackground(color);
+			}
+		}
+	}
+	
+	/**
+	 * Resets the color of cell to original
+	 */
+	public void resetColor()
+	{
+		for (int i = 0; i < 9; i++)
+		{
+			for (int j = 0; j < 9; j++)
+			{
+				grids[i][j].setBackground(Color.white);
+			}
+		}
+	}
+	
 	private JButton[][] grids;
 	private JRadioButton[] noBtn;
 	private ButtonGroup noBtnGroup;