ComputeMove Method

This method computes the new location for a node, given a new desired location and a dictionary of dragged parts.

Syntax

protected virtual Point ComputeMove( 
   Node n,
   Point newloc,
   Dictionary<Part,DraggingTool.Info> draggedparts
)

Parameters

n: the Northwoods.GoXam.Node being moved
newloc: the proposed new Northwoods.GoXam.Node.Location for the node n, in model coordinates
draggedparts: a Dictionary of Northwoods.GoXam.Parts being dragged

Return Value

a new location for the node, in model coordinates

Remarks

If DragOverSnapArea includes nodes, this finds a Northwoods.GoXam.Node that acts as a drag-snapping controller, typically a grid-like node, at the newloc point, using ConsiderSnapTo as the predicate to find a qualified drag-snapping node. If it finds such a drag-snapper node, it calls SnapTo to get the adjusted new location.

If DragOverSnapArea includes the diagram, and if the diagram's Northwoods.GoXam.Diagram.GridSnapEnabled property is true, this calls SnapTo with a null value for the moving node, allowing that method to consider the "GridSnap..." properties of the Northwoods.GoXam.Diagram in computing the new location for the node n.

It then limits the new location using the Northwoods.GoXam.Node.MinLocation and Northwoods.GoXam.Node.MaxLocation properties.

Reference

DraggingTool Class
DraggingTool Members