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Home » Eclipse Projects » Remote Application Platform (RAP) » ScrollBar and SelectionListener + a general question
ScrollBar and SelectionListener + a general question [message #39509] Wed, 18 July 2007 08:55 Go to next message
Eclipse UserFriend
Originally posted by:

Hello again,

I'd like to detect when the thumb of a (vertical) scrollbar reaches its
(lower) end. Unfortunately it seems that SelectionListener is currently
not supported for ScrollBar (at least not for the changes initiated by
the user). Hence I have two questions:

1. Will it be supported in future, and if so, when can we expect that?

2. In general, when a RAP widget supports some kind of listener, are the
corresponding events sent to the server always or only when at least one
such listener is registered with a particular widget? I ask because
while the latter would improve performance, it would also let you
implement listeners which send many, many events (such as the one for
scrollbar) without the fear that it will slow down applications which
don't use them.

Best Regards

Re: ScrollBar and SelectionListener + a general question [message #40073 is a reply to message #39509] Mon, 23 July 2007 09:05 Go to previous message
Eclipse UserFriend
Originally posted by:


1.) I don't think that we will find the time to include the
SelectionListener implementation of the ScrollBar in the 1.0 release.
Unfortunately there is no schedule yet for the time after 1.0 so I can't do
any estimations from my current point of view about when this feature will
be available.

2.) The latter is already the case. Only events that are of server-side
interest (in your example: at least one listener was registered at the
widget by the application programmer) are submitted to the server.


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