The point Tom and Michael make is correct - TextArea is not virtualised,
which means that there is indeed a Text node internally containing all
text you've set on the TextArea - even if it is not visible. This is
clearly not efficient for large amounts of text - as Michael said you
want to virtualise the visuals so that you don't have all the text in a
Text node at once.
One way that people do this is with the ListView control (or its
underlying implementation). There exists a few options you should
explore, including Tom's implementation and RichTextFX [1] by Tomas Mikula.
[1] https://github.com/TomasMikula/RichTextFX
-- Jonathan
On 20/10/2014 9:01 a.m., Navdeep Singh Sidhu wrote:
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 <[email protected]>
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 <
[email protected]>:
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 <[email protected]>
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 <
[email protected]> 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
