/// <summary>Creates a screen shot of the canvas.</summary>
/// <param name="draw">The method containing the commands for drawing to the canvas.</param>
/// <returns>A screen-shot of the canvas.</returns>
public Bitmap CreateScreenshot(Controls.DrawEventHandler draw)
{
var oldScale = _scale;
var oldRect = canvasRect;
var oldGfx = Graphics;
var bmp = new Bitmap(Size.Width, Size.Height);
using (var g = Graphics.FromImage(bmp))
{
this._scale = 1;
this.Graphics = g;
this.canvasRect = new RectangleF(Point.Empty, this.Size);
draw.Invoke(this);
}
this._scale = oldScale;
this.Graphics = oldGfx;
this.canvasRect = oldRect;
return bmp;
}