/// <summary>
/// Default constructor
/// </summary>
/// <param name="mSite"></param>
protected GraphLayout(IGraphSite mSite)
{
if (mSite == null)
{
throw new Exception("No mSite specified in graph layout constructor.");
}
;
this.mSite = mSite;
nnodes = mSite.Shapes.Count;
nedges = mSite.Connections.Count;
CanvasSize = mSite.Size;
nodes = mSite.Shapes;
edges = mSite.Connections;
extract = mSite.Abstract;
}
/// <summary>
/// Adds the shape to an GraphAbstract collection
/// </summary>
/// <param name="p"></param>
internal void Insert(GraphAbstract p)
{
Parent = p;
Parent.Shapes.Add(this);
Invalidate();
}
/// <summary>
/// Removes itself from an GraphAbstract. The connectors are deleted as part of this deletion process.
/// </summary>
protected internal override void Delete()
{
Invalidate();
// throw the connections away
ArrayList toDelete = new ArrayList();
// throw the connections away.
// Action is done in two steps because calling Delete() of a connection manipulates the connector
// collections. To Prevent an exception the connections are iterated and moved to a deletion list first.
foreach (Connector c in Connectors)
{
foreach (Connection cn in c.Connections)
{
toDelete.Add(cn);
}
}
foreach( Connection cn in toDelete )
{
cn.Delete();
}
if (Parent.Shapes.Contains(this))
Parent.Shapes.Remove(this);
Parent = null;
Invalidate();
}
/// <summary>
/// Adds the shape to an GraphAbstract collection
/// </summary>
/// <param name="p"></param>
internal void Insert(GraphAbstract p)
{
Site.Abstract.Shapes.Add(this);
Invalidate();
}
/// <summary>
/// Class constructor
/// </summary>
/// <remarks>
/// Notice the double buffering directives at the end
/// </remarks>
public GraphControl()
{
//Make sure the control repaints as it is resized
SetStyle(ControlStyles.ResizeRedraw, true);
//allow dragdrop
this.AllowDrop=true;
//instantiate the layout factory
layoutFactory=new LayoutFactory(this);
//instanciating an attached extract to the canvas
extract = new GraphAbstract();
extract.Site=this;
//init the transmission timer
transmissionTimer.Interval = AutomataPulse;
transmissionTimer.Tick += new EventHandler(OnTransmissionTimer); //attach of the handler
//enable double buffering of graphics
SetStyle(ControlStyles.DoubleBuffer, true);
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
//instantiate the library collection
mLibraries = new GraphObjectsLibraryCollection();
this.KeyDown+=new KeyEventHandler(OnKeyDown);
this.KeyPress+=new KeyPressEventHandler(OnKeyPress);
AddBaseMenu();
bag = new PropertyBag();
AddProperties();
this.AutoScroll=true;
this.HScroll=true;
this.VScroll=true;
try
{
Assembly ass= Assembly.GetExecutingAssembly();
MouseCursors.Add = new Cursor( ass.GetManifestResourceStream("Netron.GraphLib.Resources.Add.cur"));
MouseCursors.Cross = new Cursor( ass.GetManifestResourceStream("Netron.GraphLib.Resources.Cross.cur"));
MouseCursors.Grip = new Cursor( ass.GetManifestResourceStream("Netron.GraphLib.Resources.Grip.cur"));
MouseCursors.Move = new Cursor( ass.GetManifestResourceStream("Netron.GraphLib.Resources.Move.cur"));
MouseCursors.Select = new Cursor( ass.GetManifestResourceStream("Netron.GraphLib.Resources.Select.cur"));
}
catch(Exception exc)
{
Trace.WriteLine(exc.Message);
}
}
/// <summary>
/// Creates a blank new canvas
/// </summary>
public void New()
{
//save before new?
this.extract=new GraphAbstract();
this.mFileName=null;
}