and I'd like to display additional widgets when they click on an item

so I'd have to know which item is selected, and then display stuff in that list cell

and theres other elements on the form which are knowing if an item is selected or not

image.png

Selected item

so the Delete button should not show up on all items, but only when one is selected, and that selected item. as well, the update selected hosts button shouldn't be enalbed unless an item is selected

does that help?

I would love it if there's something simple that would enable the list cell fragment to know if it was the selected one, so I could have that one behave differently

Hey guys, I’m writing ChatApp using TornadoFX. On main view I have ChatListView and MessageListView(splitpane), for now the biggest problem is implementation of endless scroll. In android it would’ve taken a few strings but for PC solution is much worse. I’ve started a topic (available at https://stackoverflow.com/questions/51862577/endless-scroll-on-listview-with-kotlin-and-tornadofx) and one guy from here helped me with idea and snippet, cheers for him! But his solution works with cellFactory when I used to use cellFormat with its graphic settings for different kinds of “messages”, and my data class is completely different as well. I haven’t found any examples of use cellFactory with CustomUI fragments, can somebody help me with moving on?

hi. i think @edvin is putting in something more general and capable than what's on SO. It might be in the next release

Oh, are there any dates of next release and may be I could read about plans somewhere? I was trying to resolve this for two weeks and now it seems to be impossible, sadly

no, this is the best place for the release schedule. it's ad hoc

why is it important to use cellFormat instead of cellFactory?

Thats not mandatory actually, but I haven’t found any other way just yet

are you able to create the item you want in the updateItem() method?

updateItem___in_cell_factory.kt

"graphic" is available there too

Oh, didn’t try it yet. My cellformat looks like this, I’ll test it with updateitem now

i think that will get your program working. but you're right about this being missing in the desktop

i think we can correct this with my layoutY hack and an abstraction (pageable results, etc) that @edvin is coming up with

and I’ve found that sometimes an app uses extremely high amount of RAM, is that because of UI problems or something kotlin-based?

not sure app should be able to take 6gb

sounds high to me. don't think it's kotlin or javafx

does it seem related to the large # of records being pulled into the listview?

I though one row of data shouldn’t take more than 1 KB of ram, and I simply dont have more than 30k rows

have you used jvisualvm in the $JAVA_HOME/bin directory?

that can give you a search of objects that you're expecting to be reclaimed

sometimes --with all the binding and listeners -- a cycle develops. as you're running your app, the 30k never becomes freed and keeps gathering more and more data. this snowballs if they are being formed into Nodes that aren't able to free themselves

No, I haven’t. I’m running jdk on mac os x and my project doesnt have any heavy extensions/frameworks. And I’m not sure chatapp should have such amounts of data to work with. However, how the javafx is working with data? My idea is that it keeps data cached somewhere, but are there any limits upon using resources? I haven’t found any way of managing it, and when an app is running for a long time - it becomes laggy. No matter of free ram

Also, how to reverse listview so I start seeing rows from bottom to the top?