Question about controling node location

GoXam
1

Hi,

In ForceDirectedLayout, I want to control one node’s location. First I override IsFixed method to fix that node. Then I use the typical
go:Node.Location ="{Binding Data.Location, Mode=TwoWay}"
to bind the location to my model. I also set both HorizontalContentAlignment and
VerticalContentAlignment on the diagram to Stretch to avoid any auto adjustment.

So when I change the node’s location in code (say 0,0) , the diagram moves properly. So far so good. Now I enlarge the window and reset the node to (0,0). I expect that node will move the new center of the window. Instead, it stays where it was.

How can I accomplish that?

BTW, I don’t set HorizontalContentAlignment and VerticalContentAlignment to Center because I don’t like the sudden shift effect of the diagram after layout is finished. I implement my own animation to place the my model root at the center, which is not exactly the same as “Center” but it’s good enough for me.

Thanks.

2

You want (0,0) to be in the center of the viewport? You’ll need to set the myDiagram.Panel.Position appropriately to be the top-left corner point so that the center of the panel is (0,0) at the current scale.

In version 1.1 we will have added a DiagramPanel.CenterPart method to do exactly that. There’s a recent topic in this forum about that.

Depending on the size of the diagram contents, it might not be able to scroll that far – you may need to increase the DiagramPanel.Padding or increase the DiagramPanel.DiagramBounds.

3

Thanks, setting Panel’s Position works for me.