Dragging Multiple Links

GoXam
1

It seems I’m unable to move multiple unconnected links if I don’t also have a node selected, and noticed the same in the draggable-link demo… Is there a tool/something I can override to implement this?

Thanks
Ryan

2

Normally the DraggingTool requires a Node that CanMove().
Maybe we should change that when DraggingTool.DraggableLinks is true.

[code] public class CustomDraggingTool : DraggingTool {
public CustomDraggingTool() {
this.DraggableLinks = true;
}

protected override bool MayMove() {
  Diagram diagram = this.Diagram;
  if (diagram == null || diagram.IsReadOnly || !diagram.AllowMove) return false;
  foreach (Part part in diagram.SelectedParts) {
    if (part.CanMove()) {  // normally this only checks Nodes for CanMove()
      return true;
    }
  }
  return false;
}

}[/code]
But note that only when there is one Link (the DraggingTool.DraggedLink) that it will be automatically hooked up to ports that either end is dragged over and dropped onto.

3

Where does the linking happen when a link is dropped onto an open port? We have some properties we want to be able to clear when an unconnected link is connected a node with the dragging tool.

Thanks
Ryan

4

You can check for a Model Changed event where ModelChangedEventArgs.Changed == ModelChange.ChangedLinkFromPort or .ChangedLinkToPort.