Hi Stoyo

I have few items arranged using Tree Layout.
Once the nodes are arranged, user can move the individual nodes.

Also, if user want to move some node and all its childs he needs to select all those items (either programatically or individual node - multiple selection). Selecting all child items move all items relative to the first node.

How one can move all child nodes when parent node is moved (relative to the parent node) but the selection (adjustment handle) should not be visible for child nodes.

I tried to lock all child nodes and make selection in node modifing event. Locking the child still display the adjustment handle (when node is selected programatically ) but doesn't move the programatically selected nodes ( no matter whether node is locked or not ).

Regards
Rajesh

Regards
Rajesh

Hi Stoyo

Thanks for the reply. With the code provided when I try to reposition the nodes it works properly when node the moved horizontally. Also links of child nodes are moved relatived and the node for which move operation is triggered its incoming link changes.

Moving the node vertically ( up or down) nodes are moved properly but links of child nodes in hierachy also gets updated. Expected thing is only incoming link for top most node (which is assinged as a root in the code) gets updated.  For child node link displayed are going up from bottom anchor point and then coming again downside ( The behavior is tested with cascading lines).

-Rajesh

Hi Stoyo

Thanks. Its working now.

And another issue popup/observed -

First I moved some intermediate node from tree displayed which increase the default distance between parent and child node and then tried to moved the one of the parent node and that causes to arrange all child nodes.

How one can allow moving nodes but their relative distance user placed remain same.

With above, what I need to do is first move the parent and its child gets moved automatically and then move the child items one level down at a time (It is not possible that user selects any level item radomly for moving and moving that node re-position all child node relative to selected node ).

-Rajesh


-Rajesh

Hi Rajesh,

You should create new posts when you have something to add, edits don't appear in the 'most recent' list. Try this:

private Dictionary<DiagramNode, Rect> childRects;

private void OnNodeModifying(object sender, NodeValidationEventArgs e)
{
	if (childRects == null)
	{
		childRects = new Dictionary<DiagramNode, Rect>();
		var children = new List<DiagramNode>();
		GetChildren(e.Node, children);
		foreach (var node in children)
			childRects[node] = node.Bounds;
	}

	foreach (var node in childRects.Keys)
	{
		var rect = childRects[node];
		rect.X += diagram.Interaction.DeltaX;
		rect.Y += diagram.Interaction.DeltaY;
		node.Bounds = rect;
	}
}

private void OnNodeModified(object sender, NodeEventArgs e)
{
	childRects = null;
}

void GetChildren(DiagramNode root, List<DiagramNode> children)
{
	foreach (var link in root.OutgoingLinks)
	{
		children.Add(link.Destination);
		GetChildren(link.Destination, children);
	}
} 

You will have to extend the code to offset link control points if your links have more than one segment.

I hope that helps,
Stoyan