When a grapher is collapsed, the graphic
objects that it contains are no longer visible on the screen. The
nodes that are the destination and origin of an intergraph link are
not visible on the screen, and thus such intergraph links cannot
visually point to their end nodes. These intergraph links will
instead point to the collapsed representation of the grapher on the
screen.
The following figures show an example of
intergraph links to a grapher when it is expanded and then when it
is collapsed.
Intergraph links to an expanded Grapher
Intergraph links to a collapsed grapher
Although the links point visually to the collapsed representation
of the manager once the manager is collapsed, the real origin and
destination of the links do not change. The methods getFrom and getTo of the link ( IlvLinkImage) still return the same object.
Only the graphical representation changes. The link visually points
to the first expanded parent manager.
You could consider that the methods
getFrom
and
getTo
of the link return the real end nodes of the link. The nodes that
appear visually as end nodes on the screen can also be obtained by
using the methods getVisibleFrom and getVisibleTo of the link. If there are no
collapsed managers, the visible end nodes and the real end nodes
are always the same
For a given node, all links that have the
node as visible end node can be obtained by the methods:
IlvGrapher.getLinksVisibleFrom(IlvGraphic node)
IlvGrapher.getLinksVisibleTo(IlvGraphic node)
The links that have it as real end node are
obtained by the methods:
IlvGrapher.getLinksFrom(IlvGraphic node)
IlvGrapher.getLinksTo(IlvGraphic node)
In Intergraph links to a collapsed grapher, two
links have the visible destination node
pay for supplies
, but their real destination node is the inner node of
pay for supplies
, which is not visible in Intergraph links to a collapsed grapher, but
can be seen in Intergraph links to an expanded Grapher.
If a manager is collapsed, the position of
the connection point of the link is determined by the link
connector installed on the collapsed manager and not by the ones
installed on the real end nodes.