Why Javafx UI hangs or become unresponsive on using Plarform.runLater() ?

[Navdeep Singh Sidhu]

Sorry Tom, didn't get you :) :P . TextArea is inefficient for code editing
or for printing output??

On Sun, Oct 19, 2014 at 11:48 PM, Tom Schindl <tom.schindl at bestsolution.at>
wrote:

> TextArea in JavaFx is very ineffecient because it is not virtual!
> Codeeditors like the styledtext one i wrote use virtualflow/Listview to
> perform with many lines.
>
> Tom
>
> Von meinem iPhone gesendet
>
> > Am 19.10.2014 um 20:11 schrieb Navdeep Singh Sidhu <
> navdeepsingh.sidhu95 at gmail.com>:
> >
> > Thanks sir, that is really a great suggestion. So i have to add a
> listener
> > to scroll bar. Am i right ??
> >
> > And there is not such thing like silly question :) . Not having knowledge
> > is not bad, but having no curiosity to pursue knowledge is bad. I'm
> working
> > on parallel computing framework and my target is to multiply matrices
> with
> > BigInt elements and dimensions, for any number of given matrices (that
> also
> > can be in BigInt). On Netbeans my sample problem gives me the output
> > without crashing it or making it unresponsive. So i'm trying to achieve
> > similar in JavaFX. The main target of my project is to implement problems
> > in parallel computing and i'm using JFX as front-end because it is good
> > looking and easy to implement than Swing. But this is my first project in
> > JFX and i am facing many problems while implementing, main problem is UI
> > lag bcz in back-end different threads collect data and those threads do
> the
> > computations concurrently and send result data to UI.
> >
> > And also is there anyway i can apply monokai like theme (or any other
> > coding style theme)  to my TextArea which i'm using in Code editor for
> JAVA
> > with suggestion popups like Netbeans or eclipse?
> >
> >> On Sun, Oct 19, 2014 at 9:59 PM, Michael Berry <mjrb5 at kent.ac.uk>
> wrote:
> >>
> >> Perhaps a silly question - but do you really need millions of lines in
> the
> >> text area? When you're displaying this much text then from my
> understanding
> >> things are bound to hang (simply because of the processing overload) and
> >> there's not really a great deal you can do about it. You can see if
> there's
> >> any extraneous delay by profiling and seeing if there's any GC
> bottlenecks
> >> (or suchlike) then tweak those options, but I doubt you'll ever get to
> no
> >> delay at all with dumping this much data in a textarea.
> >>
> >> I'm not aware of the details of your application, but can you just
> create
> >> the text in memory somewhere else, and create an FX component that acts
> >> like a text area, but dynamically reads the text in from memory as the
> user
> >> scrolls? This way you'll just be altering a relatively small amount of
> text
> >> much more continuously, and shouldn't notice much of a delay. (I took a
> >> similar approach with Swing a long while ago for a project, but sadly
> can't
> >> find the source for that now.)
> >>
> >> Michael
> >>
> >> On 19 October 2014 16:58, Navdeep Singh Sidhu <
> >> navdeepsingh.sidhu95 at gmail.com> wrote:
> >>
> >>> Hello,
> >>>
> >>> I know this mailing list is for OpenJFX developers and to discuss
> >>> development related issues. I don't know it is OK to post my query
> here or
> >>> not. But i assume if you people are developing the OpenJFX, so there
> will
> >>> be no other person better than you or have more knowledge related
> OpenJFX
> >>> than you guys :) .
> >>>
> >>> My query is that i'm trying to develop an IDE for parallel computing
> >>> integrated with framework and output from all nodes has to be
> represented
> >>> in TextArea. I am using multiple threads to collect Output from all the
> >>> nodes and appending that output on TextArea using Platform.runLater(),
> i
> >>> am
> >>> even using flags to reduce the flood on UI thread, that output will be
> >>> appended if the output is larger than 50000 lines then after each 50000
> >>> lines to TextArea else it will be appended as it is. Even submitting
> one
> >>> task in the system, UI hangs when trying to print millions of line
> output
> >>> on TextArea and i couldn't test it with multiple tasks. Can you
> suggest me
> >>> something to prevent UI thread from becoming unresponsive. I know i'm
> not
> >>> good programmer as you guys but i'm trying to learn JFX and new to
> this.
> >>>
> >>> BTW thank you guys for such a beautiful interface in JAVA. :)
> >>>
> >>> Regards
> >>> Navdeep Singh Sidhu
> >>
> >>
>