private void CreateLink(XPathNavigator childNav, int linkID, Dictionary<int, DiagramNode> docNodes, int fromID, int toID)
{
DiagramLink newLink;
DiagramNode toNode, fromNode;
String firstParam;
newLink = new DiagramLink(linkID);
newLink.ToArrow = true;
newLink.PenWidth = 2;
XPathNavigator pnav = childNav.SelectSingleNode("LinkParameters/Parameter/Parameter");
if (pnav != null)
{
firstParam = "[ " + pnav.GetAttribute("value", pnav.NamespaceURI) + " ]";
GoText label = new GoText();
label.Text = firstParam;
label.Selectable = false;
newLink.MidLabel = label;
}
if (docNodes.ContainsKey(toID) && docNodes.ContainsKey(fromID))
{
toNode = docNodes[toID];
fromNode = docNodes[fromID];
newLink.ToPort = toNode.Port;
newLink.FromPort = fromNode.Port;
this.Document.Add(newLink);
}
}
private void Diagram_LinkRelinked(object sender, GoSelectionEventArgs e)
{
myController.TurnViewUpdateOff();
DiagramLink link = (DiagramLink)e.GoObject;
this.Document.Remove(link);
DiagramNode to = (DiagramNode)link.ToNode;
DiagramNode from = (DiagramNode)link.FromNode;
if (this.Tool is GoToolRelinking)
{
GoToolRelinking castTool = (GoToolRelinking)this.Tool;
GoPort start, end;
if (castTool.Forwards)
{
start = (GoPort)castTool.OriginalStartPort;
end = (GoPort)castTool.OriginalEndPort;
}
else
{
//swap
start = (GoPort)castTool.OriginalEndPort;
end = (GoPort)castTool.OriginalStartPort;
}
DiagramNode startNode = (DiagramNode)start.Node;
DiagramNode endNode = (DiagramNode)end.Node;
try
{
// record the relink in the database
this.myController.Connect(this.RootID, from.NodeID, to.NodeID, DiagramName);
// and remove the old link
this.Controller.DeleteLink(link.LinkID);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Unable to create link", MessageBoxButtons.OK, MessageBoxIcon.Warning);
// the old link was removed from the display on the unsuccessful relink
// recreate it (it's still in the db, but this is more efficient)
DiagramLink newLink = new DiagramLink();
newLink.ToArrow = true;
newLink.FromPort = startNode.Port;
newLink.ToPort = endNode.Port;
this.Document.Add(newLink);
}
}
myController.TurnViewUpdateOn();
}