Hi Stoyan,

my Templated Node has three AnchorPoints, two in and one out. When the user tries to create a DiagramLink to this node as destination it happens that the node connects the link beside one of these AnchorPoints. How can I get rid of this?

In TableNode I can set the property ConnectionStyle = TableConnectionStyle.Rows indicating that only the rows are allowed to connect links but not the node as an entity. Is there something similiar in DiagramNode?

Regards,
Werner

Hi,

I' sorry for not finding the CellFromPoint(point, bool, ref row, ref col) method. But my problem still exists.

The diagram has:
SnapToAnchor = OnCreateOrModify
AllowUnanchoredLinks  = false

The TableNode has:
ConnectionStyle = TableConnectionStyle.Rows

The ValidateAnchorPoint as follows:
private void diagram_ValidateAnchorPoint(object sender, LinkValidationEventArgs e)
{
if (e.Link == null) return;
if(e.Node == MyTableNode) e.Cancel=true;
}

And still the DiagramLink is connected to this very MyTableNode. Not at a given AnchorPoint but anywhere else at the border of the node.

Regards

I understand CellFromPoint now and do not have any more questions to that. Thanks.

Please check my code lines again. It shouldn't be possible to create the link at all:

private void diagram_ValidateAnchorPoint(object sender, LinkValidationEventArgs e)
{
if (e.Link == null) return;
if(e.Node == MyTableNode) e.Cancel=true;
}
  

But Diagramming for WPF creates the link!
The first line I have implemented to be able to start creating the link at the first node.
if (e.Link == null) return;

The second line I have implemented to supress connecting it to MyTableNode.
if(e.Node == MyTableNode) e.Cancel=true;

But still the link is created and connects to the surface of MyTableNode.

Without getting rid of this elemtary problem I don't need to count InComingLinks to supress connecting to occupied AnchorPoints because it cannot work at all.

Regards

Thanks Stoyan,

the following code works for me:

private void diagram_ValidateAnchorPoint(object sender, LinkValidationEventArgs e)
{
    if (e.Node == MyTableNode)
    {
        TableNode tn = e.Node as TableNode;
        int row = -1;
        int column = -1;

        if (tn.CellFromPoint(e.MousePosition, true, ref row, ref column))
        {
            if (tn.Rows[row].AnchorPattern == null)
            {
                e.Cancel = true;
            }
            else
            {
                e.Cancel = AnchorIsOccupied(tn.Rows[row].IncomingLinks, e.AnchorIndex, e.Link);
            }
        }
        else
        {
            e.Cancel = true;
        }
    }
    else
    {
        e.Cancel = AnchorIsOccupied(e.Node.IncomingLinks, e.AnchorIndex, e.Link);
    }
}

private bool AnchorIsOccupied(DiagramLinkCollection incomingLinks, int anchorIndex, DiagramLink skipThisLink)
{
    foreach (DiagramLink link in incomingLinks)
    {
        if (link == skipThisLink)
        {
            continue;
        }

        if (link.DestinationAnchor == anchorIndex)
        {
            return true;
        }
    }

    return false;
}
 

The probelm was that there might exists Rows that do not have an AnchorPattern but what they have is an existing Collection of IncomingLink with a count=0.

The only uncomely thing is still that I have to ask for
if(e.Node == MyTableNode)
instead of doing it in inherited manner with virtual methods for TableNode, or TemplatedNode.

Regards and thanks for your patience with me.
Pontius

Hi,

It seems we have not implemented cell tooltips. We'll try to do that for the next release.

Stoyan

Hi,

We released v2.6 a couple of weeks ago so I suppose there's no new release coming for at least 2-3 months. If you are a client and need this urgently, contact my coworkers at support@mindfusion.eu and they will arrange sending you an updated build asap.

Stoyan

Try the InitializeLink event.

Regards,
Stoyan