What would be the best way to simulate Radar in C#?

Question

I have a Picture box inside a Groupbox in my form with the Picture of a radar set as the background picture. My intention is to dynamically load tiny Jpeg images within the

Answer 1

As for actual example:

  // Among others
  using System.Collections.Generic;
  using System.Drawing;
  using System.IO;

  class TinyPic {
    public readonly Image Picture;
    public readonly Rectangle Bounds;

    public TinyPic(Image picture, int x, int y) {
      Picture = picture;
      Bounds = new Rectangle(x, y, picture.Width, picture.Height);
    }
  }

  class MyForm : Form {

    Dictionary tinyPics = new Dictionary();

    public MyForm(){
      InitializeComponent(); // assuming Panel myRadarBox
                             // with your background is there somewhere;
      myRadarBox.Paint += new PaintEventHandler(OnPaintRadar);
    }

    void OnPaintRadar(Object sender, PaintEventArgs e){
      foreach(var item in tinyPics){
        TinyPic tp = item.Value;
        e.Graphics.DrawImageUnscaled(tp.Picture, tp.Bounds.Location);
      }
    }

    void AddPic(String path, int x, int y){
      if ( File.Exists(path) ){
        var tp = new TinyPic(Image.FromFile(path), x, y);
        tinyPics[path] = tp;
        myRadarBox.Invalidate(tp.Bounds);
      }
    }

    void RemovePic(String path){
      TinyPic tp;
      if ( tinyPics.TryGetValue(path, out tp) ){
        tinyPics.Remove(path);
        tp.Picture.Dispose();
        myRadarBox.Invalidate(tp.Bounds);
      }
    }
  }

This of course is very basic, assumes image source is path and doesn't take care of many intricate things, but that's the quick and dirty jist of it which you can certainly build on.