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Mastermind design walkthrough

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This is a design walk through of Mastermind game that we developed using java

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Mastermind design walkthrough

  1. 1. • The main menu has three options • New Game – Starts a new game • Rules – Shows instructions on how to play the game • Quit – Closes the application• This is the page where the user goes if he clicks “Main Menu” button which is available on the game board
  2. 2. • Number is disabled when clicked to have a code with non repeating digits• Enter will be enabled when all for digits in the code are ready to be entered
  3. 3. MVC architecture used for Mastermind
  4. 4. Controller• The Controller is responsible for the flow of the data transmission• It consists of the „main‟ method which is responsible for starting the game• It is responsible for creating the View classes and Model classes• It maintains instances of the Model classes and invokes various business methods in them; in response to user‟s actions which could be either inputting the data or controlling the Graphical User Interface (GUI) for displaying the data using View classesView• View classes handle the GUI for the user• The data to be represented will be received from Controller whenever the user inputs new information or performs specific actions.• The received data from Controller will be presented in different elements such as Textbox, Label, Button, Table etc. (Some of these widgets can accept input from the user)• The View is independent from the Model classes; thus, it does not maintain any information about the existing classes in the Model.
  5. 5. Model• The Model is the main component and the heart of the application• It has classes that will perform majority of the game functionality part• The contained objects will have different business methods which are related to different business events and scenarios that take place in the context of the application• The master class is the Game class which is a concrete class that will keep track of the player’s turn and the outcome of the game
  6. 6. • Display and Processing are separated• Future enhancements and other maintenance of the code base made very easy and reusable• Attach multiple views to a model to provide different presentations (view/model decoupling)• Change the way a view responds to user input without changing its visual presentation” (view/controller decoupling)• All this combined gives GREAT FLEXIBILITY
  7. 7. User enters his secret code
  8. 8. User guesses computer‟s secret code
  9. 9. Computer guesses user‟s secret code
  10. 10. • Used to have flexibility and maintainability• We can increase the difficulty level in the future by adding concrete classes that use a better version of the algorithm for guessing• New checker functionality can be added when we decide to have a different method of checking for feedback (Eg: Giving only feedback when the position as well as the number match and not for number only)
  11. 11. • The controller component handles the entire application and the game starts by running the main method in the controller component(singleton pattern)• Only instance of the controller should be used to handle the game application• Using a singleton pattern to control the creation of Controller class instances helps us in this case
  12. 12. • The algorithm used to play the computer‟s chance is based on the famous five-guess algorithm which was developed by Donald Knuth in 1977. The steps involved in guessing a code given by the user is as follows: 1. Create a set S of remaining possibilities (Which is initially 10*9*8*7). Select the first possibility from this set and use it as the first guess and get the feedback for this guess 2. Remove all possibilities from S that would not give the same score of black and white pegs in the feedback if they were the answer 3. Select the first possible code from S and use it as the next guess and get the feedback. 4. Go back to step 2 until you have got it right This is the only algorithm being used right now but we can add various difficulty levels, as we are using strategy pattern to implement the algorithm.
  13. 13. 1) MVC Pattern:http://msdn.microsoft.com/en-us/library/ff649643.aspx2) Mastermind algorithm:http://en.wikipedia.org/wiki/Mastermind_(board_game)

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