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re: Calculations.count notfies its listeners on each change of the list during a GlazedLists.replaceAllSorted

by Kevin Day-7 :: Rate this Message:

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I kind of like watching the counter go up and down :-)

Some random thoughts:

While dropping and adding the PCL would work, it doesn't feel like the right solution to me.

One way to do this would be to wrap the calculation in another calculation that incorporates a delayed firing mechanism, or one that fires the change from a different thread. If firing from a different thread, have the calculation grab a read lock on the source list to obtain the value. This should block until the list updates are all complete.

I'm kind of thinking of something along the lines of:

Calculations.waitUntilPipelineUnlocks(Calculation source, ReadLock lock)

something like that??

Any other thoughts out there in GL land?

- K

----------------------- Original Message -----------------------

From: philk phil.kursawe@...

To: users@...

Cc:

Date: Thu, 25 Jun 2009 06:25:31 -0700 (PDT)

Subject: Calculations.count notfies its listeners on each change of the list during a GlazedLists.replaceAllSorted

I have a count calclualtion on my source even list.
If I refill the list (in a Master/Details scenario) the counter is changed
for each addition. On change of the counter I refresh the number of items in
my title bar. The fact the the counters change event is called for each
change results in an ever increasing/decreasing counter which.
I was thinking about removing the listener during the adding process. Or is
there a more elegant way to do that?
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