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

Navdeep Singh Sidhu navdeepsingh.sidhu95 at gmail.com
Sun Oct 19 18:11:30 UTC 2014

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

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