kotlinlang #compose-desktop

with the same amount of items works just fine. It doesn't lag while scrolling but it takes ages to show up and update it's content. is this a known issue and dropdowns are simply not cut out for >100 items or is the problem rather in my code?

➕ 3

Landry Norris

04/24/2022, 9:09 PM

In one of my projects, I need to use 1.6.20 which is only supported on 1.2.0-alpha08 of the compose compiler. I know the Android dsl allows us to override the compose compiler version. Is there a way to override this on a desktop/web project? I'm not using Android with this project.

spierce7

04/25/2022, 8:20 AM

Using the Kotlin JVM plugin I can iterate over all the jar dependencies by doing something like this:

sourceSets.getByName("main").runtimeClasspath.filter { it.path.endsWith(".jar") }

How would I get the same data in the Multiplatform Plugin for the JVM source set? I'm trying to get a list of all jars so that I can run them through an obfuscator. Everyone else I've seen attempt this seems to be using the jvm plugin, not multiplatform

Alina Grebenkina

04/25/2022, 2:10 PM

Calling all Kotlin desktop developers! We are looking for new ways to make your experience more convenient, and we’d love to get your opinions about what is good and what can be improved. Take this survey to help us make Kotlin better: ➡️ https://surveys.jetbrains.com/s3/sl-kotlin-desktop-developers-survey

🤔 2

✅ 2

spierce7

04/25/2022, 9:15 PM

I’ve added r8 to my compose desktop build. My app runs, but the window doesn’t show for some reason. I don’t see any exceptions and no errors. What’s the correct way to go about debugging this? I’ve been stuck on this for about 8 hours.

ynsok

04/26/2022, 7:40 AM

I’ve configured Proguard to my liking based on the documentation which creates a nice obfuscated

min.jar

. The problem is that native distribution packages don’t want to use the obfuscated jar to create .dmg, even when I’ve clearly specified the location.

import com.netguru.extensions.desktopMain
import org.jetbrains.compose.compose
import org.jetbrains.compose.desktop.application.dsl.TargetFormat

buildscript {
    dependencies {
        classpath(libs.desktop.proguard)
    }
}

plugins {
    kotlin("multiplatform")
    alias(libs.plugins.compose)
}

group = libs.versions.project.group.get()
version = libs.versions.project.version.get()

kotlin {
    jvm("desktop")
    sourceSets {
        desktopMain {
            dependencies {
                implementation(compose.desktop.currentOs)
                implementation(project(":application"))
            }
        }
    }
}

compose.desktop {
    application {
        mainClass = "MainKt"

        nativeDistributions {
            targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
            packageName = libs.versions.desktop.packageName.get()
            packageVersion = libs.versions.desktop.packageVersion.get()
        }
        disableDefaultConfiguration()
        from(kotlin.targets["desktop"])
        val file: File? =
            fileTree("build/compose/jars").files.firstOrNull { file: File -> file.name.contains(".min.jar") }
        mainJar.set(file)
    }
}
tasks.register("createDesktopPackage") {
    group = "desktop package"
    dependsOn("obfuscate")
    dependsOn("package")
}

tasks.register<proguard.gradle.ProGuardTask>("obfuscate") {
    val packageUberJarForCurrentOS by tasks.getting
    dependsOn(packageUberJarForCurrentOS)
    val files = packageUberJarForCurrentOS.outputs.files
    injars(files)
    outjars(files.map { file -> File(file.parentFile, "${file.nameWithoutExtension}.min.jar") })

    val library = if (System.getProperty("java.version").startsWith("1.")) "lib/rt.jar" else "jmods"
    libraryjars("${System.getProperty("java.home")}/$library")

    configuration("<http://proguard-rules.pro|proguard-rules.pro>")
}

Slackbot

04/27/2022, 11:48 AM

This message was deleted.

Dragos Rachieru

04/27/2022, 2:13 PM

Hello, I want to start adding support for

js

and

ios

in my app using the dev builds, but they don't support

material3

yet. Going through the code here I have found that in the

build.gradle

these platforms are not defined. Can you add

js

and

darwin

in the next version? I saw that there's only one file to create an actual which is just something that returns some hardcoded strings and can be copied from desktop.

eygraber

04/28/2022, 10:32 PM

I updated compose from

1.2.0-alpha01-dev620

1.2.0-alpha01-dev675

and it isn't getting found. The latest version on maven central is `dev620`:

Could not find org.jetbrains.compose.material:material:1.2.0-alpha01-dev675.
     Searched in the following locations:
       - <https://repo.maven.apache.org/maven2/org/jetbrains/compose/material/material/1.2.0-alpha01-dev675/material-1.2.0-alpha01-dev675.pom>
       - <https://oss.sonatype.org/content/repositories/snapshots/org/jetbrains/compose/material/material/1.2.0-alpha01-dev675/material-1.2.0-alpha01-dev675.pom>
       - <https://s01.oss.sonatype.org/content/repositories/snapshots/org/jetbrains/compose/material/material/1.2.0-alpha01-dev675/material-1.2.0-alpha01-dev675.pom>

lazt omen

04/29/2022, 6:37 AM

Hi, I'm new to compose. I wanted to know if there is an existing opinionated frameworks established around of compose that provides a standard structure for things like routing, state management and internationalization.

galex

04/29/2022, 10:08 AM

Crossposting here :)

Cody Mikol

05/01/2022, 12:32 AM

just like a . folder under the home dir?

Cody Mikol

05/01/2022, 3:53 PM

What is the proper way to do something like absolutely positioned elements? I'm trying to make a selection drop down. Another window element seems like it could work, but doesn't seem like the right choice.

David Herman

05/01/2022, 8:25 PM

I have some code where I need to handle the

onKeyEvent

for a

Window

, and it's giving me a

KeyEvent

, but I'm not sure how to tell if that event represents a typeable character or not without simply creating a huge mapping of Key to chars myself.

Sean Proctor

05/01/2022, 8:50 PM

I'm currently porting an application from Jetpack Navigation to Decompose. I'm stuck on trying to pass a value from a child screen to the parent screen. With Jetpack Navigation I could observe some LiveData associated with the backstack entry and pass data to the parent backstack from the child. I would like to do this in a way that the parent and child are not coupled. Does anyone have a suggestion? My first thought was to maintain the state in the root component, but I don't see how to do that in a way that only the parent can observe it.

David Herman

05/02/2022, 6:24 AM

I have a window in which I will render a bunch of text with monospace font. What I'd like to do is initially size the window to some width by height as decided by the font, e.g. 80x50 means a window that can fit 80 characters wide and 50 lines tall. Is there any trivial way to check with size of text rendering without first creating a window?

Guilherme Delgado

05/02/2022, 9:01 PM

Is there any android.graphics.Camera
equivalent (for 3D operations) so we can perform code like this:

val matrix = android.graphics.Matrix() //we have androidx.compose.ui.graphics.Matrix
val camera = Camera()
    
drawScope.drawIntoCanvas { canvas ->
        //camera transformations like camera.rotateZ, etc..
        camera.getMatrix(matrix)
        matrix.preTranslate(-x, -y)
        matrix.postTranslate(x, y)

        canvas.save()
        canvas.nativeCanvas.concat(matrix)
        drawScope.draw...
        canvas.restore()
}

Thanks.

David Herman

05/02/2022, 10:36 PM

Using the middle mouse to scroll a scrollbar doesn't seem to emit interactions (unlike manually dragging, which does). Is this intentional? I can see this being a mistake since Android doesn't have to handle middle mouse scroll as far as I understand?

xxfast

05/03/2022, 5:10 AM

Are you guys using any libraries for image loading? Looking for something like Coil, but can target desktop

👀 1

Grégory Lureau

05/03/2022, 6:54 AM

Hello! I'd want to draw a word cloud with Compose. Is there a project already available in the community or some tips to do one?

👀 1

eygraber

05/03/2022, 9:22 AM

I'm getting a

NoSuchMethodError

when using 1.2.0-alpha01-dev679 with an Android app but not jvm. Is that expected?

java.lang.NoSuchMethodError: No static method isTraceInProgress()Z in class Landroidx/compose/runtime/ComposerKt; or its super classes

Sean Proctor

05/04/2022, 1:53 PM

Has anyone managed to successfully build Kamel? I was planning to try to fix the bug with image rotation, but I can't manage to get it to build successfully.

Arkadii Ivanov

05/04/2022, 11:08 PM

In a multiplatform module, I would like to use Compose for Android and Desktop in a shared source set (

javaMain

), but keep assembling a normal iOS framework (to be consumed from an XCode project with SwiftUI), and also use Kotlin/React for UI in

jsMain

. I managed to put the Compose code into

javaMain

and

android

and

desktop

target compile just fine. I also managed to disable the Compose plugin for JS by adding

compose.web.targets()

, and it also compiles just fine. But I can't find a way to disable the Compose plugin for iOS. My iOS build fails with:

Compilation failed: Cannot find the Composer class in the classpath

Is there any workaround? I'm using Compose

1.1.1

mcpiroman

05/05/2022, 9:41 AM

I have just disovered that adding `Modifier.graphicsLayer()`to an element that can be (de)selected improves performance a lot. Do I understand correctly that without using any

Modifier.graphicsLayer()

, every recomposition causes whole screen/everything to redraw, even when not everything is recomposed?

spierce7

05/06/2022, 2:47 PM

Is there a way to turn a skia Image into a PNG? The fastest way that I’ve found is to turn it into an AWT image like this

.toComposeImageBitmap().toAwtImage()

and then use

ImageIO

to write PNG to an output stream or file. I’m wondering if there is a way to do skia Image to PNG directly.

Paul Woitaschek

05/06/2022, 4:40 PM

Is there a way to use the regular compose API in a web app?

spierce7

05/06/2022, 4:47 PM

There isn’t a version of constraint layout that works on Compose Desktop right?

Thomas

05/06/2022, 5:46 PM

Could the 1.2.0 builds please be rebased on https://android-review.googlesource.com/c/platform/frameworks/support/+/2073730/? This is a huge issue in compose and starting from build 1.2.0-alpha01-dev675 compose jb is affected. Version 1.2.0-alpha01-dev667 is not affected but is a lot older.

👀 1

Cody Mikol

05/07/2022, 2:43 PM

Is there a simple way to make a ComposeWindow scale to the size of its contents?

Mitchell Syer

05/07/2022, 3:58 PM

I got a request for smooth-scrolling for my program. Is it possible for something like that to be implemented in a Compose Desktop program?

Title

Mitchell Syer

05/07/2022, 3:58 PM

I got a request for smooth-scrolling for my program. Is it possible for something like that to be implemented in a Compose Desktop program?

Michael Paus

05/07/2022, 6:50 PM

How do you define “smooth-scrolling”? That should be the default if you do not do something completely wrong.

Mitchell Syer

05/07/2022, 6:54 PM

Well, non-instant scroll to position. I have standard LazyColumns and they all scroll to the next position(using scroll wheel) instantly.

Michael Paus

05/07/2022, 7:23 PM

Ok, then you have a different definition of “smooth-scrolling” as I have. I’d rather call this animated scrolling or something like this.

Mitchell Syer

05/07/2022, 7:28 PM

Firefox and a few other applications have smooth scroll settings that do what I describe, so not sure what else would be called

smooth-scrolling

😄

Kirill Grouchnikov

05/08/2022, 4:06 AM

https://pavelfatin.com/scrolling-with-pleasure/ if you have a couple hours to kill

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