Canvas/Scrollbar question: I was looking at the Scrollbar tutorial in the compose-jb repository and came up with

val stateVertical = rememberScrollState(0)
        val stateHorizontal = rememberScrollState(0)
        Box(modifier = Modifier.verticalScroll(stateVertical).padding(end = 12.dp, bottom = 12.dp).horizontalScroll(stateHorizontal)) {
            Canvas(modifier = Modifier.size(width.dp, height.dp) {
                drawIntoCanvas { canvas ->
					// draw things
                }
            }
        }
        VerticalScrollbar(modifier = Modifier.fillMaxHeight(), adapter = rememberScrollbarAdapter(stateVertical))
        HorizontalScrollbar(modifier = Modifier.fillMaxWidth().padding(end = 12.dp), adapter = rememberScrollbarAdapter(stateHorizontal))

I'm not sure if this is the proper way to implement a scrollable canvas, because while it does seem to scroll across the canvas fine, there don't appear to be any visual scrollbars, just empty space on the bottom and right sides of the global canvas, rather than relative to the window. The other issue I was having was that I was putting a

pointerMoveFilter

modifier on the canvas modifier to get x, y coordinates in the canvas, which apparently isn't the proper way to do it because when adding scroll bars the coordinates of the top-left position are always 0, 0 regardless of where that actually might be on the canvas. I feel like I'm definitely misunderstanding something about scrollbars here. Are they only meant for scrolling through a list, and not across an image? How would I correctly implement it for a canvas, and is there a proper method of getting the relative-to-Canvas x, y coordinates?

not getting

KEY_PRESSED

(but getting

KEY_RELEASED

) for the first key event. 🤔 Is this expected ?

Using latest IJ 2021.1 that came out today. I select JDK 14 and then advance through the wizard and it only gives me option to go up to 13. Is that a bug?

Hey everyone, I'm trying to show a notification in Windows and official example is giving me

The os does not support: 'Taskbar.setIconImage'

error. What could be the problem?

🚨 If i add 

fillMaxSize

 ,the 

onKeyEvent

 not getting called. Is this expected?

definitely file a bug (and please include a minimal repro) for that one!

For those who use MVVM as architecture for CfD, what do you usually use to replace the livedata to observe changes in state at the viewmodel properties?

Does the template that the IJ wizard generates live on github? 1. It generates a crashing android build on launch of the app 2. The root build file looks different (and simpler) than https://github.com/JetBrains/compose-jb/blob/master/templates/multiplatform-template/build.gradle.kts I suppose asking "which one is right" is a dumb question? I guess I would prefer trying to adopt the simpler one.

does idea support

@Preview

now?

When creating a compose desktop app using the wizard and selecting "Multiplatform" I was actually really surprised that android/build.gradle.kts and common/build.gradle.kts both have android deps in them. android has

dependencies {
    implementation(project(":common"))
    implementation("androidx.activity:activity-compose:1.3.0-alpha03")
}

Which makes sense. android module depends on common module. and also activity compose lib. cool. But then common has

val androidMain by getting {
            dependencies {
                api("androidx.appcompat:appcompat:1.2.0")
                api("androidx.core:core-ktx:1.3.1")
            }
        }

That seems... wrong? Should appcompat and core be directly in android build file? As an experiment I just commented out those /common android deps and placed them in /android build file and everything works. again... leaving me confused as to why have the android deps in two places?

How do you 'remember' something which could be null (and probably will be initially?). I.E. can you remember a class, but not an instance of it?

var something = remember { mutableStateOf<MyClass>(_* can't construct here because it's currently null *_) }

?

How can I hide the scrollbar automatically, seems no config now. Or should i use LazyScroll?

This could be a dumb question 😬. How do I

drawImage

(

Canvas

) with "pixelated" output?

If we ask

Canvas

to draw beyond visible area, would it draw that OR skip it? For example. let's say my window size is 100x100, and I ask

Canvas

to

drawImage

at

1000x1000

, so would it draw that OR ignore that call since its outside the window size?

Would it be better If I move

IntOffset

or

IntSize

(object creation) to outside the

DrawScope

? I mean, will there any notable performance difference if I move these measurement classes outside the

DrawScope

drawImage(
    image = R.graphics.brickPng,
    dstOffset = IntOffset(floorBrick.x, floorBrick.y), // or should I call `floorBrick.intOffset?` (where intOffset created only one time)
)

I have created multiplatform compose project using the project wizard but the produced project seems to be not runnable on desktop (It runs on Android). The desktop target has a "runtime exception" when trying to run it using the gradle task "run" of the desktop module Here is the error shown in logs

Process 'command 'C:\Program Files\JetBrains\IntelliJ IDEA 2019.3.1\jbr\bin\java.exe'' finished with non-zero exit value 1

and a log file is generated inside the module directory which contains some crap which is not quite readable (for me) I have IntelliJ IDEA 2020.3.3 (Ultimate Edition) Build #IU-203.7717.56 installed and I am working on Windows 10 machine Any ideas whether this is a local issue or the project produced by the wizard is not configured correctly Thanks in advance

For whatever it's worth. Don't move to gradle 7 yet. Android builds with jb compose seem to work, but desktop fails (using the MP template from github)

I think I'd pay for a code-review service...

Today I released version 0.1.0 of my hobby project Grim Locations. It is a tool for the game Grim Dawn that uses compose for desktop, coroutines, and exposed with Sqlite. I'd like to say thank you to you all. I have asked many questions in this channel and without you all's help this release wouldn't have been possible. Demo video: https://imgur.com/RUcxB0U Source Code: https://github.com/recursivelftr/Grim-Locations

Is there an API to play audio using compose desktop? I got an mp3 file that I'd like to play on the background when a button click occurs.

Is there a way support @Composable function green icon in IDEA , just like in android studio?

👷 I am trying to build super mario bros using compose desktop 🥼 Twitter : https://twitter.com/theapache64/status/1380809842114265088 (for updates) GitHub : https://github.com/theapache64/compose-mario 🚧

Has anyone tried to get hot reload working with desktop compose?

please do not migrate to

0.4.0-build181

, as due to upstream changes it isn’t usable

GraalVM native-images apparently supports Swing applications with the java 16 variant in dev builds. I’m curious, has anyone tried it yet for compose-desktop?

how would a mobile/desktop multiplatform app work with Kotlin + Jetpack Compose? Say, targeting iOS/Android/Windows/Mac? Business logic in Kotlin, Compose for everything except iOS, and then write the iOS view layer with Swift UI or whatever?

More daringly, has anyone attempted this?

But more importantly

Is there any webview library for the compose for desktop?