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 >> >>
