/// <summary>
/// Create a drawing template from given drawing with the given path/title
/// </summary>
/// <param name="title"></param>
/// <param name="drawing"></param>
public TemplateDrawingModel(string title, Drawing drawing)
{
if (drawing == null)
{
throw new ArgumentNullException("d");
}
_path = title;
//clone the drawing so subsequent changes effect only one copy
_originalDrawing = drawing.Clone() as Drawing;
//same here, clone the working copy. Shallow copy ok as all members are value or immutable reference types.
_drawing = _originalDrawing.Clone() as Drawing;
}
/// <summary>
/// Create a new drawing template from the persisted/serialized drawing
/// </summary>
/// <param name="path"></param>
public TemplateDrawingModel(string path)
{
StreamReader sr = new StreamReader(path);
XmlSerializer xml = new XmlSerializer(typeof(Drawing));
Drawing d = xml.Deserialize(sr) as Drawing;
if (d != null)
{
_path = path;
_originalDrawing = d;
_drawing = _originalDrawing.Clone() as Drawing;
}
}