Pixel Box

/* Made by Lonami Exo * (C) LonamiWebs * Made the 20-02-2015 */ using System; using System.Collections.Generic; using System.Drawing; using System.Linq; using System.Windows.Forms; public class PixelBox : PictureBox { public bool PaintMode; bool _ShowGrid; public bool ShowGrid { get { return _ShowGrid; } set { _ShowGrid = value; Invalidate(); } } public int CanvasSize { get { return Pixels.Size; } set { Pixels.Size = value; } } PixelMap Pixels = new PixelMap(); public Color CurrentColor = Color.Black; public PixelBox() { Pixels.Size = CanvasSize; MouseDown += PixelBox_MouseDown; MouseMove += PixelBox_MouseMove; SizeChanged += (sender, e) => Size = new Size(Size.Width, Size.Width); Pixels.PixelsChanged += Invalidate; } protected override void OnPaint(PaintEventArgs pe) { log("on paint"); var g = pe.Graphics; g.Clear(BackColor); double s = (double)Width / (double)Pixels.Size; // Size of the pixel in the PixelBox var pixels = Pixels.GetPixels(); foreach (var pixel in Pixels.GetPixels()) g.FillRectangle(new SolidBrush(pixel.PixelColor), GetRectangleF(pixel.Location.X, pixel.Location.Y, s)); if (ShowGrid) { var pen = new Pen(ForeColor); for (double x = 0; x <= Width; x += s) g.DrawLine(pen, (float)x, 0, (float)x, Width); for (double y = 0; y <= Width; y += s) g.DrawLine(pen, 0, (float)y, Width, (float)y); } base.OnPaint(pe); log("done paint"); } RectangleF GetRectangleF(int pixelX, int pixelY, double s) { double x = (double)(pixelX - 1) * s; // I don't know exactly why, this needs to be lowered by 1 double y = (double)pixelY * s; float vx = (float)x; float vy = Width - (float)y; // Y axis needs to be inverted return new RectangleF(vx, vy, (float)s, (float)s); } void PixelBox_MouseDown(object sender, MouseEventArgs e) { if (!PaintMode) return; Pixels.SetPixel(GetPoint(e.Location), CurrentColor); } void PixelBox_MouseMove(object sender, MouseEventArgs e) { if (!PaintMode || e.Button != MouseButtons.Left) return; Pixels.SetPixel(GetPoint(e.Location), CurrentColor); } Point GetPoint(Point location) { int mx = location.X; // The current location int my = Height - location.Y; // Y axis needs to be inverted int vx, vy; // Valid X and Y vx = vy = 0; double s = (double)Width / (double)Pixels.Size; // Size of the pixel in the PixelBox for (double x = 0; x <= Width; x += s) for (double y = 0; y <= Width; y += s) if (mx > x - s && mx < x && my > y - s && my < y) { vx = (int)(x / s); vy = (int)(y / s); break; } return new Point(vx, vy); } public static void log(params object[] msgs) { System.Diagnostics.Debug.WriteLine(String.Join(", ", msgs)); } } public class PixelMap { #region Delegates and events public delegate void PixelsChangedDelegate(); public event PixelsChangedDelegate PixelsChanged; #endregion #region Variables and properties public class Pixel { public readonly Point Location; public readonly Color PixelColor; public Pixel(Point location, Color color) { Location = location; PixelColor = color; } } int _Size = 16; public int Size { get { return _Size; } set { _Size = value; CheckPixels(); } } List<Pixel> Pixels = new List<Pixel>(); #endregion #region Public methods public void Clear() { Pixels.Clear(); TellPixelsChanged(); } public List<Pixel> GetPixels() { return Pixels; } public void SetPixel(int x, int y, Color color) { SetPixel(new Point(x, y), color); } public void SetPixel(Point point, Color color) { if (!IsValidPoint(point)) return; var found = Pixels.Where(p => p.Location.X == point.X && p.Location.Y == point.Y).ToList(); if (found.Count > 0) Pixels.Remove(found[0]); Pixels.Add(new Pixel(point, color)); TellPixelsChanged(); } #endregion #region Private methods void CheckPixels() { Pixels = Pixels.Where(p => IsValidPoint(p.Location)).ToList(); TellPixelsChanged(); } void TellPixelsChanged() { if (PixelsChanged != null) PixelsChanged(); } bool IsValidPoint(Point point) { return point.X > 0 && point.X <= Size && point.Y > 0 && point.Y <= Size; } #endregion }