All this threading talk has made me wonder something:
Let's say there are two threads, the FX thread and Thread 1. I do the
following:
- On thread 1: create Label
- On thread 1: set Label text to "xyz"
I now attach this label to an active Scene graph. This should be done on
the FX thread as we're going to be manipulating an active Scene graph, so:
- On FX thread: attach Label to active scene graph
There is no synchronization in place on the Label's text field. What
guarantees do I have that when the label is shown on screen it will show
"xyz" ?
IMHO, there is no such guarantee, and so any creation or manipulation of
Nodes that will later be part of an active scene graph (and thus
accessed by the FX thread) **must** be done on the FX thread. Involving
any other thread in their creation or manipulation runs the risk of
seeing an object in the incorrect state (or even an "impossible" state
when multiple fields are involved that normally change together).
Effectively, assuming that when you create Nodes you always have the
intention of showing them at some point, you can never construct Nodes
on any other thread than the FX thread...
Am I missing something?
--John
