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  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Data;
  5. using System.Drawing;
  6. using System.Linq;
  7. using System.Text;
  8. using System.Windows.Forms;
  9. using System.Drawing.Drawing2D;
  10. using System.Drawing.Imaging;
  11.  
  12. namespace WindowsFormsApplication1
  13. {
  14.     public partial class Form1 : Form
  15.     {
  16.         public Form1()
  17.         {
  18.             InitializeComponent();
  19.         }
  20.         #region サンプルコード用
  21.         Color[] _color = new Color[]
  22.         {
  23.             Color.Black,
  24.             Color.Blue,
  25.             Color.Red,
  26.             Color.Green,
  27.             Color.Gold,
  28.             Color.Purple
  29.         };
  30.         LineCap[] _cap = new LineCap[]
  31.         {
  32.             LineCap.Flat,
  33.             LineCap.Round,
  34.             LineCap.Triangle,
  35.         };
  36.         DashStyle[] _style = new DashStyle[]
  37.         {
  38.             DashStyle.Solid,
  39.             DashStyle.Dot,
  40.             DashStyle.Dash,
  41.             DashStyle.DashDot,
  42.             DashStyle.DashDotDot
  43.         };
  44.         Random rnd = new Random();
  45.         #endregion
  46.  
  47.         const int cw = 640;
  48.         const int ch = 480;
  49.         Bitmap[] bmp = new Bitmap[2];
  50.         int screen = 0;
  51.         Layer _Layer = new Layer();
  52.         PictureBox pictureBox1 = new PictureBox();
  53.         ToolStrip toolStrip1 = new ToolStrip();
  54.         ToolStripButton toolStripButton1 = new ToolStripButton();
  55.         private void Form1_Load(object sender, EventArgs e)
  56.         {
  57.             this.Controls.Add(toolStrip1);
  58.             this.Controls.Add(pictureBox1);
  59.             pictureBox1.Dock = DockStyle.Fill;
  60.             //toolStrip1.SendToBack();
  61.             toolStrip1.Items.Add(toolStripButton1);
  62.             toolStripButton1.Text = "Line";
  63.             toolStripButton1.Click += new EventHandler(toolStripButton1_Click);
  64.             bmp[0] = new Bitmap(cw, ch, PixelFormat.Format32bppArgb);
  65.             bmp[1] = new Bitmap(cw, ch, PixelFormat.Format32bppArgb);
  66.             this.ScreenUpdate();
  67.         }
  68.         private void toolStripButton1_Click(object sender, EventArgs e)
  69.         {
  70.             Pen p = new Pen(_color[rnd.Next(0,_color.Length-1)]);
  71.             p.Width = (float)rnd.Next(1, 20);
  72.             p.StartCap = _cap[rnd.Next(0,_cap.Length-1)];
  73.             p.EndCap = _cap[rnd.Next(0,_cap.Length-1)];
  74.             p.DashStyle = _style[rnd.Next(0,_style.Length-1)];
  75.             _Layer.AddLine(p,
  76.                 new PointF(
  77.                     (float)rnd.Next(20, cw-20),
  78.                     (float)rnd.Next(20, ch-20)),
  79.                 new PointF(
  80.                     (float)rnd.Next(20, cw-20),
  81.                     (float)rnd.Next(20, ch-20))
  82.                     );
  83.             this.ScreenUpdate();
  84.         }
  85.         void ScreenUpdate()
  86.         {
  87.             using (Graphics g = Graphics.FromImage(bmp[screen]))
  88.             {
  89.                 g.SmoothingMode = SmoothingMode.AntiAlias;
  90.                 g.FillRectangle(Brushes.White, 0, 0, cw, ch);
  91.                 _Layer.Draw(g);
  92.             }
  93.             pictureBox1.Image = bmp[screen];
  94.             screen ^= 1;
  95.         }
  96.     }
  97.     public class Layer
  98.     {
  99.         List<Shape> _Shapes = new List<Shape>();
  100.         public Layer()
  101.         {
  102.         }
  103.         public void AddLine(Pen p,PointF p1,PointF p2)
  104.         {
  105.             Shape s = new Shape();
  106.             s.Pen = p;
  107.             s.StartPoint = p1;
  108.             s.EndPoint = p2;
  109.             _Shapes.Add(s);
  110.         }
  111.         public void Draw(Graphics g)
  112.         {
  113.             foreach (Shape s in _Shapes)
  114.             {
  115.                 switch (s.Type)
  116.                 {
  117.                     case 0:
  118.                         g.DrawLine(s.Pen, s.StartPoint, s.EndPoint);
  119.                         break;
  120.                     default:
  121.                         break;
  122.                 }
  123.             }
  124.         }
  125.     }
  126.     public class Shape
  127.     {
  128.         public int Type = 0;
  129.         public Pen Pen;
  130.         public PointF StartPoint;
  131.         public PointF EndPoint;
  132.         public Shape()
  133.         {
  134.         }
  135.     }
  136. }
  137.  
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https://ideone.com/TUgUt
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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