User Input Handling

This section outlines the user input handling mechanism employed within the Pac-Man Blazor game.

Keyboard Controls

Keyboard controls are the primary means of controlling Pac-Man’s movement in the game. The following table maps keyboard keys to their corresponding game actions:

Key	Action
Arrow Up	Move Pac-Man Up
Arrow Down	Move Pac-Man Down
Arrow Left	Move Pac-Man Left
Arrow Right	Move Pac-Man Right

Code:

// ... (Inside the PacManGame component)
          
          private void OnKeyDown(KeyboardEventArgs e)
          {
              // ... (Handle specific key events)
          
              if (e.Key == "ArrowUp" || e.Key == "Up")
              {
                  _direction = Direction.Up;
              }
              else if (e.Key == "ArrowDown" || e.Key == "Down")
              {
                  _direction = Direction.Down;
              }
              else if (e.Key == "ArrowLeft" || e.Key == "Left")
              {
                  _direction = Direction.Left;
              }
              else if (e.Key == "ArrowRight" || e.Key == "Right")
              {
                  _direction = Direction.Right;
              }
          }
          
          // ... (Inside the PacManGame component)
          
          //  _direction variable is used to store the intended direction 
          // of movement for Pac-Man. It is updated based on the key presses. 
          

Reference: src/PacManBlazor/Pages/PacManGame.razor

Touch Input

Touch input allows for game control on touch-enabled devices. The game utilizes the Blazor OnPointerDown event to detect touch events.

Code:

// ... (Inside the PacManGame component)
          
          private void OnPointerDown(PointerEventArgs e)
          {
              // ... (Calculate touch position relative to the game board)
          
              // ... (Determine the closest direction to the touch point)
          }
          

Reference: src/PacManBlazor/Pages/PacManGame.razor

Swipe Input

Swipe input is supported for more intuitive navigation on touch devices. The game leverages the OnPointerMove event to capture swipe gestures.

Code:

// ... (Inside the PacManGame component)
          
          private void OnPointerMove(PointerEventArgs e)
          {
              // ... (Calculate the swipe distance and direction)
          
              // ... (Determine the swipe action and update the game state)
          }
          

Reference: src/PacManBlazor/Pages/PacManGame.razor

Game State Updates

User input triggers updates to the game state. These updates are reflected in the game’s rendering through the Blazor rendering pipeline.

Code:

// ... (Inside the PacManGame component)
          
          // Updates the Pac-Man position and direction based on the input.
          private void UpdateGameState()
          {
              // ... (Update the Pac-Man's position and direction)
          }
          

Reference: src/PacManBlazor/Pages/PacManGame.razor