protected override void OnNodeAdded(Node node)
{
base.OnNodeAdded(node);
MyNodeData data = node.Data as MyNodeData;
if (data == null)
{
return;
}
// look at the node's Figure
switch (data.Figure)
{
case NodeFigure.Input:
case NodeFigure.Output:
case NodeFigure.ManualOperation: {
FrameworkElement leftport = node.FindPort("2", false);
if (leftport != null)
{
SpotPanel.SetSpot(leftport, new Spot(0.05, 0.5, 1, 0));
}
FrameworkElement rightport = node.FindPort("3", false);
if (rightport != null)
{
SpotPanel.SetSpot(rightport, new Spot(0.95, 0.5, -1, 0));
}
break;
}
default: break;
}
}
public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
Link link = value as Link;
if (link != null && link.FromNode != null)
{
MyNodeData d = link.FromNode.Data as MyNodeData;
if (d != null && d.Key.StartsWith("Conditional"))
{
return(Visibility.Visible);
}
}
return(Visibility.Collapsed);
}
public override bool IsValidLink(Node fromnode, FrameworkElement fromport, Node tonode, FrameworkElement toport)
{
if (!base.IsValidLink(fromnode, fromport, tonode, toport))
{
return(false);
}
// don't allow a link directly from Start to End
MyNodeData fromnodedata = fromnode.Data as MyNodeData;
MyNodeData tonodedata = tonode.Data as MyNodeData;
if (fromnodedata != null && fromnodedata.Category == "Start" &&
tonodedata != null && tonodedata.Category == "End")
{
return(false);
}
return(true);
}