kotlinlang #tornadofx

I typed up some notes and posted the code for the Polling App I wrote last week. I'll be tweeting this out as part of the "weekly tornadofx article" series when everyone's in front of the computer for the work week.

carlw

01/28/2018, 9:02 PM

https://courses.bekwam.net/public_tutorials/bkcourse_tornadofx_polling.html

Carlton Whitehead

01/28/2018, 10:04 PM

I noticed while updating my tornadofx version from 1.7.12 to 1.7.14 that my tests broke. Things seem to go off the rails when a

runAsyncWithProgress

in the view under test is rejected by a ThreadPoolExecutor with status Terminated. I see in the release notes for 1.7.13 there was a change "internal thread pools are shut down on app exit". Setting the tfx version to 1.7.13 results in the same failure. Has anyone dealt with this?

Carlton Whitehead

01/28/2018, 10:04 PM

I suspect there's an issue with the way my tests are handling the TestFX / TornadoFX app lifecycles

Carlton Whitehead

01/29/2018, 3:16 AM

The affected test is at https://github.com/caeos/coner-worker/blob/core-service-connection-details-tests/src/test/kotlin/org/coner/worker/page/EstablishConnectionTest.kt#L121

hestad

01/29/2018, 9:37 AM

When using children.bind(create-new-list-here), the bind function doesn't store a reference of the list and it will be garbage collected. Do you agree? And if so; should I make an issue of that?

carlw

01/29/2018, 2:45 PM

This is one of the reasons I've been pushing MVVM in my projects. A lot of the dependency problems are resolved by factoring common lifecycle objects out to where they can be shared.

carlw

01/29/2018, 2:46 PM

I would code the UI the way you want with bind(). Do a code review to see if there are any bi-directional problems. If you see any problems after that, then profile with VisualVM and count the object instances to find the leak.

➕ 1

mariofelesdossantosjr

01/29/2018, 7:20 PM

it's possible to put a button inside the row of the tableview

mariofelesdossantosjr

01/29/2018, 7:20 PM

amanda.hinchman-dominguez

01/29/2018, 11:36 PM

Is there a way to make a copy of a Kotlin variable? I am getting this behavior where when I drag a Tile, the image in the tile gets passed to the next placement, as opposed to making a copy of that image so the image is not removed from the original tile

amanda.hinchman-dominguez

01/29/2018, 11:39 PM

I saw an interesting article on apply v copy here, but I'm not successful in copying a tile yet: http://www.preslav.me/2016/06/26/kotlin-basics-apply-and-copy/

amanda.hinchman-dominguez

01/29/2018, 11:41 PM

@amanda.hinchman-dominguez uploaded a file: attempt at copying values:

attempt_at_copying_values_.kt

amanda.hinchman-dominguez

01/29/2018, 11:42 PM

it was my belief originally that simply grabbing the values and then applying them to build a new tile would prevent the issue of "stealing" elements from another tile, but it appears that the image has not been spared.

abhinay

01/30/2018, 12:52 AM

In JavaFX, you can use a node just once in the scene-graph. When you do:

val image = tileTarget.graphicProperty()!!.value as ImageView

you are just storing the reference of the ImageView in a variable

image

instead of "copying" 🙂

abhinay

01/30/2018, 12:53 AM

@amanda.hinchman-dominguez There is a simple way to overcome your problem.

amanda.hinchman-dominguez

01/30/2018, 12:54 AM

@abhinay I suspected as much

abhinay

01/30/2018, 12:55 AM

Do you understand the problem?

amanda.hinchman-dominguez

01/30/2018, 12:56 AM

I do, I'm figuring out a way to make a copy using a dataclass, which uses

copy()

abhinay

01/30/2018, 12:56 AM

not required 🙂

abhinay

01/30/2018, 12:57 AM

The problem is that you cannot use the same "node" twice