@olonho @Igor Demin In this context menu Tutorial, is the code linked below a simple copy of the code above it by mistake? I was looking for info about adding a context menu to an arbitrary window area. https://github.com/JetBrains/compose-jb/blob/master/tutorials/Context_Menu/README.md#context-menu-for-an-arbitrary-area Thanks!

Hi, I'm using

collectAsState()

with a flow that emits new values very frequently, about 10 times a second. The problem is that the

SnapshotStateObserver.applyMaps

property keeps growing and consumes more and more memory over time. This can be reproduced with the code below. A heap dump shows that after 50,000 iterations there is a single instance of

androidx.compose.runtime.snapshots.SnapshotStateObserver$ApplyMap[]

that consumes about 100 MB. As it seems to be by design that

applyMaps

can only grow, is there a fundamental issue with my code, or is there another approach I could use for frequent updates without eventually running out of memory?

class TestState {
    private val scope = CoroutineScope(Dispatchers.Default)
    val value = MutableStateFlow(0)

    init {
        scope.launch {
            while (true) {
                value.value = value.value + 1
                delay(100)
            }
        }
    }
}

@Composable
fun App() {
    val state = remember { TestState() }
    val value = state.value.collectAsState()
    Text("value = ${value.value}")
}

At the end of my wits debugging a bizarre issue. My CfD application launches another third-party Java application. That application fails to load some crucial .dll files and crashes, but only when my application is started using

runDistributable

. It runs fine when launched from my application if it's launched via

run

; it only fails to load the dlls and crashes when built for dist. Code here: <https://github.com/davidwhitman/SMOL/blob/dev/App/main/kotlin/smol_app/toolbar/Toolbar.kt#L148> and here <https://github.com/davidwhitman/SMOL/blob/dev/Utilities/main/kotlin/utilities/Utils.kt#L43> Screenshots and stacktrace: <https://github.com/davidwhitman/SMOL/issues/73> Things I've tried: • ProcessBuilder and Runtime exec, same results. • Copied the dll file to System32, which fixed the problem, I don't know why. • Many various usages of ProcessBuilder and Runtime exe, same results. •

includeAllModules = true

same results • Viewed in VisualVM, noted that the java program I'm launching doesn't show up, presumably because it's a subprocess, but that's true even when it works correctly so not sure if relevant. The other, crashing java program is given the dll path in env variable, but it successfully loads other dlls in the same path (and fails to load them if I rename them). This is probably too complex/unique for anyone to want to dive deep into, but I'll take any suggestions. One thing I'd like to try is launching the other java program as a standalone process, not a subprocess, but I haven't found a way to do this at all.

cmd /C

doesn't do it. I should maybe mention that the reason I consider this Compose-related is the difference between it working using

run

and not working using

runDistributable

. There's something about the Compose build that's changing things. update: Setting

-Djava.library.path

to an absolute path instead of relative seems to fix it. Doesn't make much sense to me, since it loads other .dlls from that folder without issue. Now I just need to figure out how to get java path variables to allow spaces... update: Just had to remove the

cmd /C

, probably the

/C

switch can't handle spaces in paths since it hands it all as a string. My problem is solved, although I couldn't say why this solution works. It's probably a unique case, but I'll leave this post anyway because you never know.

Good morning everybody 🙂 Seeking for a little help here! I am supposed to upgrade a framework (&some demo applications) based on Compose v0.4 to v1.1. While upgrading, I’ve stumbled upon some classes which are not existing anymore, e.g.

LocalAppWindow

or

AppManager

Concret, I’m talking about this function, which should add some default key behaviour when pressing

ctrl

+ `q`:

@OptIn(ExperimentalComposeUiApi::class)
@Composable
private fun add addDefaultKeyBehaviour(){
    val key: Key = if(System.getProperty("os.name") == "Mac OS X") Key.MetaLeft else Key.CtrlLeft
    LocalAppWindow.current.keyboard.setShortcut(KeysSet(setOf(key, Key.Q))){
        AppManager.focusedWindow?.close()
    }
}

As I could not find any migration tutorial, I would appreciate some advice on this 🙂 Thanks in advance!

Hi everybody, I'm new to Compose for desktop. Currently working on the Kiosk app on Windows OS I would like to know if there are any libraries for the virtual keyboard? or can I create a virtual keyboard inside the Compose for Desktop app? Here is my question on StackOverflow https://stackoverflow.com/q/71379870/3024962 🙇 🙏

Two questions: 1. Can I set a minimum size for a window? 2. How can I make draggable change the cursor to the resize icon whenever it's on the border of something?

Is it possible to keep the "scroll-state" of two LazyColumns in sync? I would like to have a "table" consisting of LazyColumns. See current code in thread.

Hello, How do I open a new Window in the middle of a @Composable function, and pause the execution while keeping the Window open until it is manually closed?? See thread for code. Thanks!

I have a project that uses ktorm for database access. I am looking to start using compose desktop as the UI, but I am a little confused on how to handle the ViewModel portion that I previously had used in tornadofx. What is the best paradigm to use with compose and is there any solid implementations that I could use as a reference? Google leaves me with more questions than answers atm

For whatever reason, I have to move the launched window around directly after building to be able to get things like the context menu to work and DropTarget to work. Is there a fix for this?

Hello, Is there a way to add options to the windows installer to add desktop and start menu shortcuts? I have to manually find the app in program files to run it because it can't be found easily in the windows searchbar

Maybe someone here will have more info on https://kotlinlang.slack.com/archives/CJLTWPH7S/p1646626860089129 (didn't get any traction in #compose)

I don't see how I can react to the pinch-to-zoom gesture on an Notebook touchpad. On Mac going up and down with two fingers is scrolling like mouse wheel. But how can I detect pinch-to-zoom? I looked at the imageviewer sample which uses

detectTransformGestures

. That works on my Android tablet, but does nothing on my MacBooks touchpad.

is there a way to ask for an image file using compose desktop? my use case is letting users select a file from their computer as their profile photo in my app. for anyone doing android, this would be done using the OpenDocument contract (or ACTION_OPEN_DOCUMENT intent)

Why are

androidx.compose.ui.util.fastAny

and

androidx.compose.ui.util.fastForEach

not available?

Hello there, does anyone know if compose desktop has support for emojis?

I've read a lot about state managment and libraries that help like redux, flowredux, decompose, kotlin-bloc etc. But I can't seem to wrap my head around how composables are meant to relate to state and the one that seems to have the proper example, decompose, just seems overly complicated. Searching google is a crap shoot since jetpack is so popular. I'm primarily developing a desktop app, but the state is rather complicated so I'm concerned about state mgmt using just compose. What's the secret recipe that I am missing for someone relativly green?

what is a good navigation library for the compose desktop?

Hi everyone, does anyone know if any 3rd-party library out there supports Compose Desktop to run lotties?

Hi Guys, just started playing around with Compose, and was wonder what's the latest compose version right now

Hi all. I have been looking for an example of how to change the background of an

IconButton/Icon

when the mouse hovers over it. Much like what happens in Winddows, when you move the mouse over the window close button. I stumble on the

MutableInteractSource

but haven't found anything that allows me to et the background. Does anyone have any example I could leverage. Thanks

https://ibb.co/86f9dDq using the platform default, this shows how different the fonts look compare the compose text and the windows title text

[✅ SOLVED] Is it possible to hide the title bar entirely, but leave the traffic lights and the draggable zone? 🤔

has anyone had issues trying to get a Compose for Desktop application to get network access on Windows? is there some trick to enabling network connectivity? I'm building an app using a Windows machine for development, and there's nothing I can do with networking that doesn't result in an exception "Connection refused: no further information":

Hello, I'm trying to update a composable using mutableState inside a loop, but it only updates to the last value, after the loop finishes In Main.kt

@Composable
fun App() {
    var myClass = remember { MyClass() }
    MaterialTheme {
        Column() {
            Text(text="${myClass.myInt.value}")
            Button(onClick = myClass::run){ Text(text = "RUN") }
        }
    }
}

where

class MyClass {
    val myInt = mutableStateOf(0)
    fun run(){
        for (i in 0..10){
            myInt.value = i
            Thread.sleep(500)
        }
    }
}

what am I missing?

I have some code that behaves differently when run from a fresh template CfD project's

runDistributable

than when run from

run

, from a Java CLI jar, or from a Kotlin CLI jar. Here's the full code of the application (the rest is as generated from the CfD template)

fun main() = application {
    Window(onCloseRequest = ::exitApplication) {
        Button(onClick = {
            ProcessBuilder(
                "C:\\Program Files (x86)\\Fractal Softworks\\Starsector1.95.1-RC6\\starsector.exe"
            )
                .directory(File("C:\\Program Files (x86)\\Fractal Softworks\\Starsector1.95.1-RC6"))
                .start()

        }) {
            Text("Hello Madness")
        }
    }
}

The actual issue is hard to describe;

starsector.exe

launches a java-based game that runs on its own jre 7/8. The game crashes only when launched from CfD dist because it's unable to resolve some relative file paths that are passed to it from `starsector.exe`as jvm params. Mimicking the functionality of the

exe

with a custom

java -jar

thing fixes the issue if I use absolute paths for the game files, but this has other side effects (like any windows compat settings applied to the

exe

aren't used since I'm working around it. I don't want to work around the problem; the code works everywhere except as a CfD dist. I can take that

ProcessBuilder

code, put it into a pure java or kotlin CLI program, compile a jar, run it, and it'll run the game just fine. Literally it's only when run from

runDistributable

(or from the

.exe

built from

createDistributable

). Any ideas? What's being done differently by CfD's dist exe?

Hello, I am trying to recreate the viewmodel from android and I don't know how. I want to have a

viewModelScope

inside it and use that, so maybe using

rememberCoroutineScope()

with it, but I don't know how to do it properly.

Hi there Trying to open a dialog when pressing a button (e.g.

onClick

). Although, getting the compiler error

@Composable invocations can only happen from the context of a @Composable function

since

onClick

does not seem to accept a

Composable

function as argument. What would I need to change in my code to get this work? Code:

@Composable
private fun showDialogButton(){
    Button(onClick = {openDialog()}){
        Text("Hello Button")
    }
}

@Composable
private fun openDialog(){
    Dialog(onCloseRequest = {}, title = "Dialog"){
        Button(onClick = {}) {
            Text("Close Dialog")
        }
    }
}

Hi guys, I'm not sure how to play sound files in compose desktop. I tried Javax library but it has very limited features. I believe currently there is no support for playing sounds but any idea when we will get that feature ?!

I have finally managed to get ProGuard working with CfD, with native distribution and packaging 🚀 - check out a sample setup . (Bad news is that, at first sight, optimization step does not boost performance in any way. I guess it's just more relevant to Android rather than modern JVM).