C# and WPF tutorial files
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C# Beginners/TicTacToe/MainWindow.xaml.cs
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247
C# Beginners/TicTacToe/MainWindow.xaml.cs
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using System;
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using System.Linq;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Media;
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namespace TicTacToe
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{
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/// <summary>
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/// Interaction logic for MainWindow.xaml
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/// </summary>
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public partial class MainWindow : Window
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{
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#region Private Members
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/// <summary>
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/// Holds the current results of cells in the active game
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/// </summary>
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private MarkType[] mResults;
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/// <summary>
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/// True if it is player 1's turn (X) or player 2's turn (O)
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/// </summary>
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private bool mPlayer1Turn;
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/// <summary>
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/// True if the game has ended
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/// </summary>
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private bool mGameEnded;
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#endregion
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#region Constructor
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/// <summary>
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/// Default constructor
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/// </summary>
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public MainWindow()
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{
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InitializeComponent();
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NewGame();
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}
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#endregion
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/// <summary>
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/// Starts a new game and clears all values back to the start
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/// </summary>
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private void NewGame()
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{
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// Create a new blank array of free cells
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mResults = new MarkType[9];
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for (var i = 0; i < mResults.Length; i++)
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mResults[i] = MarkType.Free;
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// Make sure Player 1 starts the game
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mPlayer1Turn = true;
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// Interate every button on the grid...
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Container.Children.Cast<Button>().ToList().ForEach(button =>
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{
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// Change background, foreground and content to default values
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button.Content = string.Empty;
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button.Background = Brushes.White;
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button.Foreground = Brushes.Blue;
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});
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// Make sure the game hasn't finished
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mGameEnded = false;
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}
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/// <summary>
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/// Handles a button click event
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/// </summary>
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/// <param name="sender">The button that was clicked</param>
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/// <param name="e">The events of the click</param>
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private void Button_Click(object sender, RoutedEventArgs e)
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{
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// Start a new game on the click after it finished
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if (mGameEnded)
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{
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NewGame();
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return;
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}
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// Cast the sender to a button
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var button = (Button)sender;
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// Find the buttons position in the array
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var column = Grid.GetColumn(button);
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var row = Grid.GetRow(button);
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var index = column + (row * 3);
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// Don't do anything if the cell already has a value in it
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if (mResults[index] != MarkType.Free)
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return;
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// Set the cell value based on which players turn it is
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mResults[index] = mPlayer1Turn ? MarkType.Cross : MarkType.Nought;
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// Set button text to the result
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button.Content = mPlayer1Turn ? "X" : "O";
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// Change noughts to green
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if (!mPlayer1Turn)
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button.Foreground = Brushes.Red;
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// Toggle the players turns
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mPlayer1Turn ^= true;
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// Check for a winner
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CheckForWinner();
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}
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/// <summary>
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/// Checks if there is a winner of a 3 line straight
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/// </summary>
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private void CheckForWinner()
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{
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#region Horizontal Wins
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// Check for horizontal wins
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//
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// - Row 0
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//
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if (mResults[0] != MarkType.Free && (mResults[0] & mResults[1] & mResults[2]) == mResults[0])
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{
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// Game ends
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mGameEnded = true;
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// Highlight winning cells in green
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Button0_0.Background = Button1_0.Background = Button2_0.Background = Brushes.Green;
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}
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//
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// - Row 1
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//
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if (mResults[3] != MarkType.Free && (mResults[3] & mResults[4] & mResults[5]) == mResults[3])
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{
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// Game ends
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mGameEnded = true;
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// Highlight winning cells in green
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Button0_1.Background = Button1_1.Background = Button2_1.Background = Brushes.Green;
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}
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//
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// - Row 2
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//
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if (mResults[6] != MarkType.Free && (mResults[6] & mResults[7] & mResults[8]) == mResults[6])
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{
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// Game ends
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mGameEnded = true;
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// Highlight winning cells in green
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Button0_2.Background = Button1_2.Background = Button2_2.Background = Brushes.Green;
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}
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#endregion
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#region Vertical Wins
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// Check for vertical wins
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//
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// - Column 0
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//
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if (mResults[0] != MarkType.Free && (mResults[0] & mResults[3] & mResults[6]) == mResults[0])
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{
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// Game ends
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mGameEnded = true;
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// Highlight winning cells in green
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Button0_0.Background = Button0_1.Background = Button0_2.Background = Brushes.Green;
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}
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//
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// - Column 1
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//
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if (mResults[1] != MarkType.Free && (mResults[1] & mResults[4] & mResults[7]) == mResults[1])
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{
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// Game ends
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mGameEnded = true;
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// Highlight winning cells in green
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Button1_0.Background = Button1_1.Background = Button1_2.Background = Brushes.Green;
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}
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//
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// - Column 2
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//
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if (mResults[2] != MarkType.Free && (mResults[2] & mResults[5] & mResults[8]) == mResults[2])
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{
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// Game ends
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mGameEnded = true;
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// Highlight winning cells in green
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Button2_0.Background = Button2_1.Background = Button2_2.Background = Brushes.Green;
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}
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#endregion
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#region Diagonal Wins
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// Check for diagonal wins
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//
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// - Top Left Bottom Right
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//
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if (mResults[0] != MarkType.Free && (mResults[0] & mResults[4] & mResults[8]) == mResults[0])
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{
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// Game ends
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mGameEnded = true;
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// Highlight winning cells in green
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Button0_0.Background = Button1_1.Background = Button2_2.Background = Brushes.Green;
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}
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//
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// - Top Right Bottom Left
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//
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if (mResults[2] != MarkType.Free && (mResults[2] & mResults[4] & mResults[6]) == mResults[2])
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{
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// Game ends
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mGameEnded = true;
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// Highlight winning cells in green
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Button2_0.Background = Button1_1.Background = Button0_2.Background = Brushes.Green;
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}
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#endregion
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#region No Winners
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// Check for no winner and full board
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if (!mResults.Any(f => f == MarkType.Free))
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{
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// Game ended
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mGameEnded = true;
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// Turn all cells orange
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Container.Children.Cast<Button>().ToList().ForEach(button =>
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{
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button.Background = Brushes.Orange;
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});
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}
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#endregion
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}
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}
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}
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