248 lines
10 KiB
C#
248 lines
10 KiB
C#
using Snake.Model;
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using Snake.Persistance;
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namespace view
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{
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public partial class Form1 : Form
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{
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#region Fields
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const int line_width = 2; // Width of the table lines
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SnakeLevel? CurrentLevel; // Current game state
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SnakeLevelLoader level_loader; // Level loader
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#endregion
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#region Constructor
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public Form1()
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{
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InitializeComponent();
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level_loader = new SnakeLevelLoader(Path.Combine(Directory.GetCurrentDirectory(), "levels.json"));
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}
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#endregion
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#region Draw Funciton
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/// <summary>
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/// Draws the current map to the canvas
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/// </summary>
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private void Draw()
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{
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if (CurrentLevel == null) return;
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using Graphics canvas_graphics = Canvas.CreateGraphics();
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using Bitmap bmp = new Bitmap(Canvas.Width, Canvas.Height, canvas_graphics);
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using Graphics graphics = Graphics.FromImage(bmp);
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graphics.Clear(Color.White);
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var canvas_size = Math.Min(Canvas.Width, Canvas.Height);
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double cell_size = (double)(canvas_size - (CurrentLevel.Size + 1) * line_width) / CurrentLevel.Size;
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// vertical lines
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for (int i = 0; i <= CurrentLevel.Size; i++)
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{
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int x = (int)(i * (cell_size + line_width));
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graphics.FillRectangle(Brushes.Black, x, 0, line_width, canvas_size);
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}
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// horizontal lines
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for (int i = 0; i <= CurrentLevel.Size; i++)
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{
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int y = (int)(i * (cell_size + line_width));
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graphics.FillRectangle(Brushes.Black, 0, y, canvas_size, line_width);
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}
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// Ssnake
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foreach (var pos in CurrentLevel.Snake)
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{
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int x = (int)(cell_size * pos.X + line_width * (pos.X + 1));
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int y = (int)(cell_size * pos.Y + line_width * (pos.Y + 1));
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graphics.FillRectangle(Brushes.Green, x, y, (int)cell_size, (int)cell_size);
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}
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// snake head
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int snake_head_x = (int)(cell_size * CurrentLevel.SnakeHead.X + line_width * (CurrentLevel.SnakeHead.X + 1));
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int snake_head_y = (int)(cell_size * CurrentLevel.SnakeHead.Y + line_width * (CurrentLevel.SnakeHead.Y + 1));
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graphics.FillRectangle(Brushes.Red, snake_head_x, snake_head_y, (int)cell_size, (int)cell_size);
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switch (CurrentLevel.SnakeHeadDirection)
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{
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case SnakeLevel.SnakeDirection.Up:
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graphics.DrawLine(Pens.Black, snake_head_x + (int)cell_size / 2, snake_head_y, snake_head_x + (int)cell_size / 2, snake_head_y + (int)cell_size);
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graphics.DrawLine(Pens.Black, snake_head_x + (int)cell_size / 2, snake_head_y, snake_head_x, snake_head_y + (int)cell_size / 2);
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graphics.DrawLine(Pens.Black, snake_head_x + (int)cell_size / 2, snake_head_y, snake_head_x + (int)cell_size, snake_head_y + (int)cell_size / 2);
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break;
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case SnakeLevel.SnakeDirection.Down:
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graphics.DrawLine(Pens.Black, snake_head_x + (int)cell_size / 2, snake_head_y, snake_head_x + (int)cell_size / 2, snake_head_y + (int)cell_size);
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graphics.DrawLine(Pens.Black, snake_head_x + (int)cell_size / 2, snake_head_y + (int)cell_size, snake_head_x, snake_head_y + (int)cell_size / 2);
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graphics.DrawLine(Pens.Black, snake_head_x + (int)cell_size / 2, snake_head_y + (int)cell_size, snake_head_x + (int)cell_size, snake_head_y + (int)cell_size / 2);
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break;
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case SnakeLevel.SnakeDirection.Left:
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graphics.DrawLine(Pens.Black, snake_head_x, snake_head_y + (int)cell_size / 2, snake_head_x + (int)cell_size, snake_head_y + (int)cell_size / 2);
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graphics.DrawLine(Pens.Black, snake_head_x, snake_head_y + (int)(cell_size / 2), snake_head_x + (int)(cell_size / 2), snake_head_y);
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graphics.DrawLine(Pens.Black, snake_head_x, snake_head_y + (int)(cell_size / 2), snake_head_x + (int)(cell_size / 2), snake_head_y + (int)cell_size);
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break;
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case SnakeLevel.SnakeDirection.Right:
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graphics.DrawLine(Pens.Black, snake_head_x, snake_head_y + (int)cell_size / 2, snake_head_x + (int)cell_size, snake_head_y + (int)cell_size / 2);
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graphics.DrawLine(Pens.Black, snake_head_x + (int)cell_size, snake_head_y + (int)(cell_size / 2), snake_head_x + (int)(cell_size / 2), snake_head_y);
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graphics.DrawLine(Pens.Black, snake_head_x + (int)cell_size, snake_head_y + (int)(cell_size / 2), snake_head_x + (int)(cell_size / 2), snake_head_y + (int)cell_size);
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break;
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}
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// obstacles
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foreach (var pos in CurrentLevel.Obstacles)
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{
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int x = (int)(cell_size * pos.X + line_width * (pos.X + 1));
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int y = (int)(cell_size * pos.Y + line_width * (pos.Y + 1));
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graphics.FillRectangle(Brushes.Black, x, y, (int)cell_size, (int)cell_size);
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}
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//eggs
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foreach (var pos in CurrentLevel.Eggs)
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{
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int x = (int)(cell_size * pos.X + line_width * (pos.X + 1));
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int y = (int)(cell_size * pos.Y + line_width * (pos.Y + 1));
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graphics.FillRectangle(Brushes.Pink, x, y, (int)cell_size, (int)cell_size);
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}
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canvas_graphics.DrawImage(bmp, 0, 0);
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}
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#endregion
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#region Form event handlers
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private void Form1_KeyDown(object sender, KeyEventArgs e)
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{
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if (CurrentLevel == null) return;
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switch (e.KeyCode)
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{
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case Keys.Up:
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CurrentLevel.SnakeHeadDirection = SnakeLevel.SnakeDirection.Up;
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break;
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case Keys.Down:
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CurrentLevel.SnakeHeadDirection = SnakeLevel.SnakeDirection.Down;
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break;
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case Keys.Left:
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CurrentLevel.SnakeHeadDirection = SnakeLevel.SnakeDirection.Left;
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break;
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case Keys.Right:
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CurrentLevel.SnakeHeadDirection = SnakeLevel.SnakeDirection.Right;
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break;
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case Keys.Escape:
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if (CurrentLevel.State == SnakeLevel.GameState.Running)
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CurrentLevel.Pause();
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break;
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}
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}
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private void btnStart_Click(object sender, EventArgs e)
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{
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if (CurrentLevel is null || CurrentLevel.State == SnakeLevel.GameState.Dead)
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{
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var MapChooser = new MapChooser(this.level_loader);
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MapChooser.ShowDialog();
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if (MapChooser.SelectedLevel != null)
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{
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CurrentLevel = level_loader.LoadLevel(MapChooser.SelectedLevel);
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CurrentLevel.GameStateUpdate += CurrentLevel_GameStateUpdate;
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CurrentLevel.GameUpdate += CurrentLevel_GameUpdate;
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}
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else
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{
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CurrentLevel = null;
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}
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}
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if (CurrentLevel != null)
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{
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CurrentLevel.Start();
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this.Focus();
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}
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}
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private void Form1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
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{
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if (CurrentLevel?.State is SnakeLevel.GameState.Running)
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{
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e.IsInputKey = true;
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}
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}
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private void Form1_Shown(object sender, EventArgs e)
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{
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btnEndGame.Visible = false; // It will trigger a whole repaint the first time it is shown unless this is done
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level_loader.ReadAllDataAsync().ContinueWith((task) =>
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{
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if (!this.IsDisposed) // The form can be closed before the file is loaded
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{
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this.Invoke(() =>
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{
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if (task.IsCompletedSuccessfully)
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{
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lblLoading.Visible = false;
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btnStart.Enabled = true;
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btnStart.Focus();
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}
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else
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{
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MessageBox.Show("Failed to read data");
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}
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});
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}
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});
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}
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private void button1_Click(object sender, EventArgs e)
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{
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CurrentLevel = null;
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btnEndGame.Visible = false;
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Canvas.Refresh();
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txtScore.Text = "";
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}
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private void Form1_FormClosing(object sender, FormClosingEventArgs e)
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{
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if (CurrentLevel != null)
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{
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if (CurrentLevel.State == SnakeLevel.GameState.Running)
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{
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CurrentLevel.Pause();
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}
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CurrentLevel = null;
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}
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}
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#endregion
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#region Game event handlers
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private void CurrentLevel_GameUpdate(object? sender, EventArgs e)
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{
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if (CurrentLevel == null) return;
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this.Invoke(() =>
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{
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Draw();
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txtScore.Text = CurrentLevel.Score.ToString();
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});
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}
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private void CurrentLevel_GameStateUpdate(object? sender, SnakeLevel.GameState e)
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{
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if (CurrentLevel == null) return;
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this.Invoke(() =>
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{
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switch (e)
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{
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case SnakeLevel.GameState.Running:
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btnStart.Visible = false;
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btnEndGame.Visible = false;
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Draw();
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break;
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case SnakeLevel.GameState.Paused:
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btnStart.Visible = true;
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btnEndGame.Visible = true;
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break;
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case SnakeLevel.GameState.Dead:
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btnStart.Visible = true;
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MessageBox.Show($"Skill issue.\nScore: {CurrentLevel.Score}", "Snake", MessageBoxButtons.OK, MessageBoxIcon.Information);
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break;
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}
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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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