https://kotlinlang.org logo
Channels
100daysofcode
100daysofkotlin
100daysofkotlin-2021
advent-of-code
aem
ai
alexa
algeria
algolialibraries
amsterdam
android
android-architecture
android-databinding
android-studio
androidgithubprojects
androidthings
androidx
androidx-xprocessing
anime
anko
announcements
apollo-kotlin
appintro
arabic
argentina
arkenv
arksemdevteam
armenia
arrow
arrow-contributors
arrow-meta
ass
atlanta
atm17
atrium
austin
australia
austria
awesome-kotlin
ballast
bangladesh
barcelona
bayarea
bazel
beepiz-libraries
belgium
benchmarks
berlin
big-data
books
boston
brazil
brikk
budapest
build
build-tools
bulgaria
bydgoszcz
cambodia
canada
carrat
carrat-dev
carrat-feed
chicago
chile
china
chucker
cincinnati-user-group
cli
clikt
cloudfoundry
cn
cobalt
code-coverage
codeforces
codemash-precompiler
codereview
codingame
codingconventions
coimbatore
collaborations
colombia
colorado
communities
competitive-programming
competitivecoding
compiler
compose
compose-android
compose-desktop
compose-hiring
compose-ios
compose-mp
compose-ui-showcase
compose-wear
compose-web
confetti
connect-audit-events
corda
cork
coroutines
couchbase
coursera
croatia
cryptography
cscenter-course-2016
cucumber-bdd
cyprus
czech
dagger
data2viz
databinding
datascience
dckotlin
debugging
decompose
decouple
denmark
deprecated
detekt
detekt-hint
dev-core
dfw
docs-revamped
dokka
domain-driven-design
doodle
dsl
dublin
dutch
eap
eclipse
ecuador
edinburgh
education
effective-kotlin
effectivekotlin
emacs
embedded-kotlin
estatik
event21-community-content
events
exposed
failgood
fb-internal-demo
feed
firebase
flow
fluid-libraries
forkhandles
forum
fosdem
fp-in-kotlin
framework-elide
freenode
french
fritz2
fuchsia
functional
funktionale
gamedev
ge-kotlin
general-advice
georgia
geospatial
german-lang
getting-started
github-workflows-kt
glance
godot-kotlin
google-io
gradle
graphic
graphkool
graphql
graphql-kotlin
graviton-browser
greece
grpc
gsoc
gui
hackathons
hacktoberfest
hamburg
hamkrest
helios
helsinki
hexagon
hibernate
hikari-cp
hire-me
hiring
hiring-french
hongkong
hoplite
http4k
hungary
hyderabad
image-processing
india
indonesia
inkremental
intellij
intellij-plugins
intellij-tricks
internships
introduce-yourself
io
ios
iran
israel
istanbulcoders
italian
jackson-kotlin
jadx
japanese
jasync-sql
java-to-kotlin-refactoring
javadevelopers
javafx
javalin
javascript
jdbi
jhipster-kotlin
jobsworldwide
jpa
jshdq
juul-libraries
jvm-ir-backend-feedback
jxadapter
k2-early-adopters
kaal
kafka
kakao
kalasim
kapt
karachi
karg
karlsruhe
kash_shell
kaskade
kbuild
kdbc
kgen-doc-tools
kgraphql
kinta
klaxon
klock
kloudformation
kmdc
kmm-espaƱol
kmongo
knbt
knote
koalaql
koans
kobalt
kobweb
kodein
kodex
kohesive
koin
koin-dev
komapper
kondor-json
kong
kontent
kontributors
korau
korean
korge
korim
korio
korlibs
korte
kotest
kotest-contributors
kotless
kotlick
kotlin-asia
kotlin-beam
kotlin-by-example
kotlin-csv
kotlin-data-storage
kotlin-foundation
kotlin-fuel
kotlin-in-action
kotlin-inject
kotlin-latam
kotlin-logging
kotlin-multiplatform-contest
kotlin-mumbai
kotlin-native
kotlin-pakistan
kotlin-plugin
kotlin-pune
kotlin-roadmap
kotlin-samples
kotlin-sap
kotlin-serbia
kotlin-spark
kotlin-szeged
kotlin-website
kotlinacademy
kotlinbot
kotlinconf
kotlindl
kotlinforbeginners
kotlingforbeginners
kotlinlondon
kotlinmad
kotlinprogrammers
kotlinsu
kotlintest
kotlintest-devs
kotlintlv
kotlinultimatechallenge
kotlinx-datetime
kotlinx-files
kotlinx-html
kotrix
kotson
kovenant
kprompt
kraph
krawler
kroto-plus
ksp
ktcc
ktfmt
ktlint
ktor
ktp
kubed
kug-leads
kug-torino
kvision
kweb
lambdaworld_cadiz
lanark
language-evolution
language-proposals
latvia
leakcanary
leedskotlinusergroup
lets-have-fun
libgdx
libkgd
library-development
lincheck
linkeddata
lithuania
london
losangeles
lottie
love
lychee
macedonia
machinelearningbawas
madrid
malaysia
mathematics
meetkotlin
memes
meta
metro-detroit
mexico
miami
micronaut
minnesota
minutest
mirror
mockk
moko
moldova
monsterpuzzle
montreal
moonbean
morocco
motionlayout
mpapt
mu
multiplatform
mumbai
munich
mvikotlin
mvrx
myndocs-oauth2-server
naming
navigation-architecture-component
nepal
new-mexico
new-zealand
newname
nigeria
nodejs
norway
npm-publish
nyc
oceania
ohio-kotlin-users
oldenburg
oolong
opensource
orbit-mvi
osgi
otpisani
package-search
pakistan
panamĆ”
pattern-matching
pbandk
pdx
peru
philippines
phoenix
pinoy
pocketgitclient
polish
popkorn
portugal
practical-functional-programming
proguard
prozis-android-backup
pyhsikal
python
python-contributors
quasar
random
re
react
reaktive
realm
realworldkotlin
reductor
reduks
redux
redux-kotlin
refactoring-to-kotlin
reflect
refreshversions
reports
result
rethink
revolver
rhein-main
rocksdb
romania
room
rpi-pico
rsocket
russian
russian_feed
russian-kotlinasfirst
rx
rxjava
san-diego
science
scotland
scrcast
scrimage
script
scripting
seattle
serialization
server
sg-user-group
singapore
skia-wasm-interop-temp
skrape-it
slovak
snake
sofl-user-group
southafrica
spacemacs
spain
spanish
speaking
spek
spin
splitties
spotify-mobius
spring
spring-security
squarelibraries
stackoverflow
stacks
stayhungrystayfoolish
stdlib
stlouis
strife-discord-lib
strikt
students
stuttgart
sudan
swagger-gradle-codegen
swarm
sweden
swing
swiss-user-group
switzerland
talking-kotlin
tallinn
tampa
teamcity
tegal
tempe
tensorflow
terminal
test
testing
testtestest
texas
tgbotapi
thailand
tornadofx
touchlab-tools
training
tricity-kotlin-user-group
trójmiasto
truth
tunisia
turkey
turkiye
twitter-feed
uae
udacityindia
uk
ukrainian
uniflow
unkonf
uruguay
utah
uuid
vancouver
vankotlin
vertx
videos
vienna
vietnam
vim
vkug
vuejs
web-mpp
webassembly
webrtc
wimix_sentry
wwdc
zircon
Powered by
Title
y

Yofou

04/02/2021, 11:43 PM
So I'm almost 100% certain this ain't the correct place to ask. but I'm not really sure where else to ask, so here it goes. I'm using Jetpack compose for desktop and I'm using
decompose
for my navigation and to decouple my logic from my UI, however I'm little bit stumpped on this one problem, two pages I have need to share same state and I'm struggling to figure out how to pass it down to both of them, the closest I got was to put it in my NavComponent class and try to pass it down through the child
render
functions, I reckon if i tinckered abit more, I could maybe of got it too work, however this was getting really ugly and hard to maintain which makes me feel like I'm doing it wrong, so I reverted the changes back and I'm now asking for any examples or further advice on how to aproach something like this with
decompose
Also If you're confused about what decompose is, then checkout it here <https://github.com/arkivanov/Decompose>
c

Colton Idle

04/03/2021, 12:37 AM
I don't use decompose but just sharing my general thought on your problem because I feel like people hit this problem a lot on Android. Problem = I have screen a and screen b and I need them to share some state. Realistically the only thing you can do is to send this state back and forth and try to sync it up and try not to mess it up Or You can just put the state into the next highest shared scope by the two screens and use it that way.
j

jim

04/03/2021, 1:04 AM
Yes, the second approach is correct. Hoist the state up into the application level. Often, your application will have a database or some backend where you represent your application's data. Your data should be hoisted up to this level, not remembered by your composable functions.
šŸŽ‰ 2
y

Yofou

04/03/2021, 1:12 AM
@jim @Colton Idle Hey thank you both for your advice and yes both of your answers are what I was trying to achieve before and what I was trying to do, but I think I'll try to be more clear, hoisting the state on a (jetpack) composable is something I have done everywhere on this application, the problem I'm having is hoisting n passing down state between a (decompose) logic component. Hence my explaining me trying to work around this by passing it through the childrens render functions (which is where you place the jetapack compose composables). which I almost got to work, but felt like the wrong way of doing things
@Arkadii Ivanov hopefully you don't mind me mentioning you but I think you're the correct person to ask (not like I'm not open for others helping or anything)
a

Arkadii Ivanov

04/03/2021, 8:57 AM
Hi. Do you support any non-compose targets like iOS or JS?
y

Yofou

04/03/2021, 9:00 AM
Hi, no I'm currently only support compose for desktop only
(and plan to keep it dat way for the most part)
a

Arkadii Ivanov

04/03/2021, 9:05 AM
In this case you can pass shared state to children as follows:
class MyChild(val state: State<SharedState>) {}
If you need to put children in separate Gradle modules then I recommend to define separate state data class for each child, to avoid coupling. And pass it as
Value<State>
. In the parent you can map it as follows:
state.map { ... }
.
y

Yofou

04/03/2021, 8:10 PM
Ok, So this is intresting, I make a child class (
MyChild
) that I pass the state through it, but then how do I pass that class to both of my logic components (classes), or do you mean I pass the state through the logic components class constructor? and then pass it down through the componentFactory function I supply to the router?
I think it would help if there was also some code I could look at, seeing this be done
a

Arkadii Ivanov

04/03/2021, 8:30 PM
Yes, I mean pass it via constructors (dependency injection).
y

Yofou

04/03/2021, 9:21 PM
Yep, Awesome. I think I understand what's going on here, thank you for your help so far. šŸ™‚ I just have one more question, as I'm running into this error
Exception in thread "AWT-EventQueue-0" java.lang.NoSuchFieldError: Companion
I only started getting this error from when I updated (decompose) from v0.1.9 to v0.2.1. the stacktrace is pointing to this lines of code here...
fun main() = Window(
    title = "Cache Monkey",
    size = IntSize(1100, 635),
    undecorated = true,
    resizable = true,
) {
    MaterialTheme {
        Surface(
            color = Color(32, 32, 32),
            modifier = Modifier.fillMaxSize()
        ) {
            rememberRootComponent(factory = ::NavComponent).render()
        }
    }
}
what the current NavComponent Looks like <https://pastecord.com/ezyroqidih.kt> and what the full error is saying <https://pastecord.com/akimezuqof.apache>
a

Arkadii Ivanov

04/04/2021, 12:01 AM
Looks like binary compatibility in Compose was broken (again?). Decompose
0.2.1
is compiled against Compose
0.4.0-build177
. Please make sure you are using this version.
y

Yofou

04/04/2021, 2:55 AM
Yep that worked thank you so much ā¤ļø
šŸ‘ 1