Added undo button.

Board.cpp

@@ -547,6 +547,7 @@ void Board::interpret(string input, Board& tablero){
 	input = myToUpper(input);
 	
 	if (input == "UNDO"){
+		cout << "TEST";
 		undo(tablero);
 	}
 	

Client.java

@@ -33,6 +33,7 @@ public class Client {
 	public static final int BLACK = 0, WHITE = 1;
 	public static String boardoutput = "";
 	public String oldBoard = "";
+	public static String undoString = "";
 	
 	public Client() {
 		initializeGui();
@@ -109,7 +110,18 @@ public class Client {
 		}
 		
 		// fill the board.
-		boardPanel.add(new JLabel(""));
+		Action undoMove = new AbstractAction("") {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				undoMoveSend();
+			}
+		};
+		ImageIcon icon = new ImageIcon( new BufferedImage(64, 64, BufferedImage.TYPE_INT_ARGB));
+		JButton undo = new JButton("UNDO", icon);
+		undo.setMargin(buttonMargin);
+		undo.setAction(undoMove);
+		undo.setBackground(new Color(150, 150, 150));
+		boardPanel.add(undo);
 		// fill the top row
 		for(int c = 0; c < 8; c++) {
 			boardPanel.add(new JLabel(Columns.substring(c, c + 1), SwingConstants.CENTER));
@@ -223,6 +235,10 @@ public class Client {
 		}
 		oldBoard = board;
 	}
+
+	public final void undoMoveSend() {
+		undoString = "UNDO";
+	}
 	
 	public void sendLocation(int r, int c) {
 		//debugging.
@@ -296,6 +312,12 @@ public class Client {
 				window.updateBoard(String.valueOf(buffer).trim());
 				while(!end && boardoutput.length() < 4) {
 					Thread.sleep(100);
+					if(!undoString.equals("")) {
+						System.out.println(undoString);
+						output.println(undoString);
+						output.flush();
+						undoString = "";
+					}
 				}
 				System.out.println(boardoutput);
 				output.println(boardoutput);

Server.cpp

@@ -31,6 +31,9 @@ string tempParse(string move) {
 	for(int c = 0; c < 4; c++) {
 		if(!isdigit(move[c])) {
 			//cout << "\nfjdkjfjd\n";
+			if(move.substr(0, 4) == "UNDO") {
+				return "UNDO";
+			}
 			return move;
 		}
 	}
@@ -145,7 +148,6 @@ int main(int argc, char *argv[])
 				bzero(buffer,256);
 				//cout << move << "\n\n";
 				move = tempParse(move);
-				//cout << move << "\n\n";
 				e.getBoard()->interpret(move,(*e.getBoard()));
 				
 				if(e.getBoard()->isValid()) {