/// <summary>
/// Release all used memory
/// </summary>
public void Dispose()
{
if (_listViews != null)
{
while (_listViews.Count > 0)
{
IView view = _listViews[0];
_listViews.RemoveAt(0);
view.Dispose();
view = null;
}
_listViews.Clear();
_listViews = null;
}
if (_history != null)
{
_history.Clear();
_history = null;
}
if (_turtle != null)
{
_turtle.Dispose();
_turtle = null;
}
}
/// <summary>
/// Performs the provided action against the turtle
/// </summary>
/// <param name="action">IAction - The action instance with which to perform on the turtle</param>
public void Perform(IAction action)
{
if (action == null) return;
if (_turtle == null) _turtle = new Turtle();
bool success = action.Perform(_turtle);
if (success)
{
_history.Add(action);
for (int index = 0; index < _listViews.Count; index ++)
{
_listViews[index].Draw(_turtle);
_listViews[index].Print(action.ToString());
}
}
}
/// <summary>
/// Default constructor. Must always instantiate object without exception
/// </summary>
private Conductor()
{
_listViews = new List<IView>();
_turtle = null;
_history = new List<IAction>(25);
}
/// <summary>
/// Load an XML document from file
/// </summary>
/// <param name="filePath"></param>
public void Load(string filePath)
{
if (!File.Exists(filePath)) throw new FileNotFoundException("File not found!", filePath);
XmlDocument xmlDocument = null;
try
{
xmlDocument = new XmlDocument();
xmlDocument.Load(filePath);
}
catch (Exception ex)
{
throw new Exception("Failed to load XML document!");
}
XmlNode document = xmlDocument["Document"];
if (document == null) throw new Exception("Root document element not found in file!");
// clean up old memory if it exists
if (_turtle != null)
{
_turtle.Dispose();
_turtle = null;
}
if (_history != null)
{
_history.Clear();
_history = null;
}
// create new turtle instance
_turtle = new Turtle();
_turtle.Surface.ToString();
_turtle.Reset();
_history = new List<IAction>();
for (int index = 0; index < document.Attributes.Count; index++)
{
XmlAttribute attribute = document.Attributes[index];
switch (attribute.Name.ToLower())
{
case "backcolor":
_turtle.BackColor = Color.FromName(attribute.Value);
break;
case "forecolor":
_turtle.ForeColor = Color.FromName(attribute.Value);
break;
case "penwidth":
float penWidth = 0f;
if (float.TryParse(attribute.Value, out penWidth)) _turtle.PenWidth = penWidth;
break;
case "width":
int width = 0;
if (int.TryParse(attribute.Value, out width)) _turtle.Size = new Size(width, _turtle.Size.Height);
break;
case "height":
int height = 0;
if (int.TryParse(attribute.Value, out height)) _turtle.Size = new Size(_turtle.Size.Width, height);
break;
}
}
for (int index = 0; index < document.ChildNodes.Count; index++)
{
XmlNode child = document.ChildNodes[index];
// simply pass to ActionFactory and try perform the result...
IAction action = ActionFactory.Create(child);
if (action != null) Perform(action);
}
document = null;
xmlDocument = null;
}
