I need to create an ImageBitmap from raw ARGB pixels contained in an IntArray. On Android I do this like this

override fun imageBitmapFromArgb(rawArgbImageData: IntArray, width: Int, height: Int): ImageBitmap {
    val image = ImageBitmap(width, height, ImageBitmapConfig.Argb8888, true, ColorSpaces.Srgb)
    image.asAndroidBitmap().setPixels(rawArgbImageData, 0, width, 0, 0, width, height)
    return image
}

but there does not seem to be a suitable way to do the same on desktop. The Skia bitmap does not seem to have a

setPixels

method.

Hi, I'm starting with Compose for Desktop and I'm following https://github.com/JetBrains/compose-jb/blob/master/FEATURES.md#features-currently-available-in-compose-for-desktop Do you know if exist any book, Course etc … or if there is someone who is creating it for follow him.

Hi folks, there is any official compose desktop project sample that could be used as a Showcase of Compose on Desktop?

`checkIsDisplayed()`not implemented? I found this article on Desktop Compose layout testing which looks to provide the exact solution I need for testing with non-Android Desktop Compose. When I run the code (see below) it looks an awful lot like some needed code is not written yet. Can someone from JetBrains elaborate and answer the questions: 1. Is the code necessary for the test to work in fact not implemented, in which case, can I do anything to help get it implemented? 2. Perhaps I am using an invalid mix of versions; is my build.gradle.kts file correct? If not, which part did I get wrong? 3. @olonho is there a road map for Compose Desktop testing infrastructure available for public consumption? 4. I'm guessing that for Compose UI testing today, Android is the only game in town. Would that be a good guess?

Hi everyone, I’m trying to build a form to fill in project details which needs a datepicker. As suggested in the channel i tryed to use the LGoodDatePicker. I made some progress and i can now open the datepicker when the trailing icon of a textfield is clicked. I just need to figure out how to hook everything up correctly, but I’m also quite unsure if this is the right approach. Any feedback would be appreciated. Code in the thread

Hello @Igor Demin! How are you? Just wondering if you guys have had any success sorting the Object Touch Targets issue with the 3D transformation? Thanks! Cheers.

Hi. Does somebody have an experience with compose desktop being used from java? Writing new components is not an issue. We are interesting in creating desktop application with Java (educational course, java is required). Since we want to avoid Swing we are exploring other options.

with(LocalDensity.current) {
    window.minimumSize = Dimension(400.dp.roundToPx(), 250.dp.roundToPx())
}

Is there a way to subscribe to the local density as state so that if it changes it triggers a re-draw?

I built a little Snake game using Compose for Desktop. Thanks to @Sebastian Aigner for the excellent blog post about his Asteroid game. I couldn't have done without it. https://github.com/gnu11111/snake-compose-for-desktop https://dev.to/kotlin/how-i-built-an-asteroids-game-using-jetpack-compose-for-desktop-309l

Hey guys, I had a question. Does anybody knows why

TextField

has some sort of padding, that causes the content cut (Please look at attached image)? And how I can eliminate it? Just please consider I don’t want to decrease font size or increase the height of

TextField

or

OutlinedTextField

to match the content. I am looking for another way. I also tried

Modifier.padding

on the textField and didn’t matter. Thank you in advance.

Hi there, quick question. What's the best way to perform a async call in a Composable ? I used to call my repositories from ViewModels but I don't know the appropriate way to do so with Compose Desktop. Here is a quick example:

@Composable
fun RoomsScreen(
    onRoomClick: (Int) -> Unit,
    onBack: () -> Unit
) {
    val rooms = remember { mutableStateOf(emptyList<WSRoom>()) }
    rooms.value = runBlocking { RoomRepository.getAllRooms() }

    ...
}

Here I've noticed that the RoomRepository.getAllRooms gets called every recomposition. What are your recommandation to avoid that ?

Hello all, Is there a Status Bar component I can easily add to my CfD program, similar to the way MenuBar works? Or do I need to just create a custom area with text and icon objects etc? Thanks!

Hi, I got kind of a newbie question on how to properly hoist state when using a SwingPanel inside my Composable… When my application starts, the UI contains a few ui components. One of them is JFreeChart which is hosted inside a JPanel which I add inside a SwingPanel composable. Something like that:

var chartFrame: ChartPanel? = null

@Composable
private fun TheChart() {
    Card(elevation = 5.dp, shape = RoundedCornerShape(0.dp), modifier = Modifier.fillMaxSize()) {
        if (chartFrame == null) {
            val series = XYSeries("Sensors Reading")
            series.add(0, 3)
            series.add(1, 4)
            series.add(2, 5)
            series.add(3, 6)
            series.add(4, 7)
            series.add(5, 3)
            val dataset = XYSeriesCollection(series)
            val chart: JFreeChart = ChartFactory.createXYLineChart("Test", "Time (seconds)", "Sensors value", dataset)
            val frame = ChartPanel(chart)
            frame.isVisible = true
            chartFrame = frame
        }

        Box {
            SwingPanel(
                factory = {
                    JPanel().apply {
                        layout = BoxLayout(this, BoxLayout.Y_AXIS)
                        add(chartFrame)
                    }
                })
        }
    }
}

This renders great and looks as it should. Now, when I want to push in new data, I basically need to update the dataset, and I do that by adding x,y values to the series object. Now obviously this needs to be hoisted out of the Composable and get pushed into the function as a parameter. But I am not entirely sure on how to architect that properly in Compose. I also added a check for null to make sure not to recreate the chart object on each recomposition and I think this is not ideal here. Can any one assist?

Is there a better way to move text to the vertical center of a

Row

? than

padding(top = 8.dp)

? I have tried

.wrapContentHeight(Alignment.CenterVertically)

in the modifier and it does not do anything, the text stays stuck at the top.

androidx.compose.ui.renderComposeScene

seems to have disappeared in

1.2.0-alpha01-dev620

(upgrading from

1.1.0-alpha04

). Where did it go?

hey all, are Tray icons a bit buggy on Gnome? I just get a black rectangle (and clicking on it to reveal the menu, pops the menu on the wrong screen, d'oh!)

The compose-jb issue #368 documents the difficulties users of Compose Multiplatform have been having trying to write non-Android GUI tests. It clearly identifies an example (ScrollBarTest) that actually works. But there are many operations, particularly

checkIsDisplayed()

, that are not currently implemented in the

ui-test-junit4

component thus causing a serious problem for those of us wanting to write GUI tests for our Compose Multiplatform apps. To address this problem, I have volunteered to work on implementing some of these not yet implemented functions. The first step is to set up a development environment for this work. That environment is the subject of this post, a Readers Digest version of material provided by @Igor Demin (for which I am so, so grateful). The basic work is described in https://android.googlesource.com/platform/frameworks/support.git/+/refs/heads/android-arch-work-release/README.md and essentially entails: 1. Getting the source code 2. Setting up java 3. Setting up Android Studio 4. Verifying the development setup by running a working test 5. Developing a fix, with test, for some unimplemented method 6. Getting the code reviewed by @olonho and/or @Igor Demin 7. Generating a PR to the JetBrains fork Getting the source code The source code is obtained using a Google tool, '`repo`', which is a layer on top of git. For work on Compose Multiplatform, the branch to use is "androidx-main". The download uses ~40G and takes a while. A gigabit network, or better, is highly recommended. The repo installation instructions can be found at https://source.android.com/setup/develop#installing-repo . I used homebrew (

brew install repo

) on a MacBook Pro. Once repo is installed, the branch (androidx-main) is initialized and downloaded using steps from https://source.android.com/setup/build/downloading : mkdir <path/for/androidx-main/code> cd <path/for/androidx-main/code> repo init -u https://android/googlesource.com/platform/manifest repo init -u https://android.googlesource.com/platform/manifest -b androidx-main repo sync -c -j8 Setting up Java The Compose Multiplatform team recommends using JDK15 but I have been using JDK11 successfully for ui-test-junit4 so far. Homebrew is an excellent way to manage multiple JDK versions simultaneously, particularly Open JDK. I am also told that JDK11 is provided by the

repo

download, but I seem to recall needing an installed JDK11 at one point. Setting up Android Studio At this point, when the script completes, we are ready to use Android Studio (Dolphin), which is included in the download of "androidx-main", as a source file editor by executing:

cd frameworks/support

./gradlew studio

Verifying the development setup by running a working test The next step is to verify that the ScrollBarTest can be run successfully. While this usually can be done using Android Studio or Gradle, a known bug in Dolphin generates a "Nothing here" message so we use Gradle with:

./gradlew cleanDesktopTest :compose:foundation:foundation:desktopTest --tests "androidx.compose.foundation.ScrollbarTest"

The remaining three steps will be performed in the coming days and I will edit this post accordingly. My hope is that others will find this documentation useful and enable them to contribute fixes also.

Hi all, I've just started "playing" with Compose and I have seen some tantalizing hints on the web regarding using icon packs within a desktop application. Can anyone point me at any examples or samples on how I can include icons into my application. Thx

how to make an element not handle mouse events? For example, as in css: pointer-events: none;

How can one stop a text field from expanding as you type something inside it that goes beyond its width? It would be nice for the text to scroll left as you type more into the text field.

Is there a YouTrack for Compose-JB? I can’t seem to find one from searching.

Hi! I've got a simple app that uses compose desktop. I'm trying to

./gradlew packageDeb

from a macOS in order to later deploy it on a raspberry pi. I've asked @theapache64 but seems like packaging needs to be done on the same platform. Does anybody know a workaround?

Can I access the parent window in a composition?

Has anyone got an article or a tutorial to share explaining how to integrate CfD with some OO framework like JavaFX?

getting the following error in a bazel build

Caused by: java.lang.AbstractMethodError: Receiver class androidx.compose.compiler.plugins.kotlin.ComposeComponentRegistrar does not define or inherit an implementation of the resolved method 'abstract void registerProjectComponents(com.intellij.mock.MockProject, org.jetbrains.kotlin.config.CompilerConfiguration)' of interface org.jetbrains.kotlin.compiler.plugin.ComponentRegistrar.
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment$Companion.registerExtensionsFromPlugins$cli(KotlinCoreEnvironment.kt:610)
	... 47 more

Quick question, our Kotlin / CfD code can be exported to Android and iOS apps? With all the right background config I haven't learnt yet, I guess, but possible or not?

Hi, I was trying to read the Android documentation about state holders, but I don't really get it, I think I need to read some more examples... Do you guys know any apps that use that design pattern that I can look at as an example?

Where is the repository for compose desktop? Is it Open Source? Can I contribute?

Where can I find an example of how Jetbrains Toolbox aligns the screen bellow the Menu Bar item? I looked into Compose Desktop samples but I did not find anything similar...