The Flag renderer example is deliberately kept simple.
You could make various enhancements, for example:
Visibility
If
a node changes its visibility, the flag remains visible. This may
seem to be what is wanted at first sight, because the flag is raised
even if the node is not present. However, a dangling flag seems strange.
Therefore, a better implementation is to listen to the
IlvManager. property changes on its objects, and then set the
visibility of the flag according to the visibility of the node.
Position
You
can position the flag somewhere other than the top-left corner. For
example, you can set the flag location as an offset when you create
it, and use another graphic property, FlagAnchor,
to set the position of the corner of the node to which the flag is
to be attached.
Several flags
You
can add several flags to the same node. Make sure that you control
the layout of the flags so that they operate in a coherent way.