MartinZikmund

private void NextGeneration()
{
    _gameState?.Tick();
    RedrawBoard();
}

MartinZikmund

public void Clear()
{
    for (int row = 0; row < Size; row++)
    {
        for (int column = 0; column < Size; column++)
        {
            Cells[row, column] = CellState.Dead;
        }
    }
}

MartinZikmund

private void Clear()
{
    _gameState?.Clear();
    RedrawBoard();
}

MartinZikmund

private BitmapImage _aliveBitmap = new BitmapImage(new Uri($"ms-appx:///Assets/Classic_alive.png"));
private BitmapImage _deadBitmap = new BitmapImage(new Uri($"ms-appx:///Assets/Classic_dead.png"));

private void RedrawBoard()
{
    for (var row = 0; row < _gameState.Size; row++)
    {
        for (var column = 0; column < _gameState.Size; column++)
        {
            var cell = GetCell(row, column);

MartinZikmund

private void LayoutGameBoard()
{
    var minDimension = Math.Min(GameCanvasContainer.ActualHeight, GameCanvasContainer.ActualWidth);
    var cellSize = (int)minDimension / _gameState.Size;
    // make cell size a multiple of 4 for proper scaling
    cellSize = (cellSize / 4) * 4;

    if (cellSize <= 0)
    {
        cellSize = 4;

MartinZikmund

private readonly List<Image> _cells = new List<Image>();

private void PrepareGrid()
{
    GameCanvas.Children.Clear();

    for (var row = 0; row < _gameState.Size; row++)
    {
        for (var column = 0; column < _gameState.Size; column++)
        {

MartinZikmund

private GameState _gameState;

private void StartNewGame()
{
    var boardSize = (int)BoardSizeNumberBox.Value;
    if (_gameState?.Size != boardSize)
    {
        _gameState = new GameState(boardSize);        
        PrepareGrid();
        LayoutGameBoard();

MartinZikmund

<Page
    ...
    xmlns:controls="using:Microsoft.UI.Xaml.Controls">

    <Grid
        Padding="12"
        Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
        RowSpacing="8">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />

MartinZikmund

<ComboBox
    x:Name="ThemeComboBox"
    Grid.Row="1"
    Grid.Column="1"
    HorizontalAlignment="Stretch"
    Header="Theme"
    ItemsSource="{x:Bind Themes}"
    SelectedItem="{x:Bind CurrentTheme, Mode=TwoWay}" />

MartinZikmund

private void UpdateBitmaps()
{
    _aliveBitmap = new BitmapImage(new Uri($"ms-appx:///Assets/{_currentTheme}_alive.png"));
    _deadBitmap = new BitmapImage(new Uri($"ms-appx:///Assets/{_currentTheme}_dead.png"));
}