To MPP

components/App/demo/build.gradle.kts

@@ -7,9 +7,9 @@ plugins {
 }
 
 kotlin {
-    jvm {}
+    jvm("desktop") {}
     sourceSets {
-        named("jvmMain") {
+        named("desktopMain") {
             dependencies {
                 implementation(compose.desktop.currentOs)
                 implementation(project(":App:library"))

components/App/demo/src/desktopMain/kotlin/org/jetbrains/compose/app/demo/Main.kt

@@ -1,9 +1,9 @@
 package org.jetbrains.compose.app.demo
 
 import androidx.compose.material.Text
-import org.jetbrains.compose.app.application
+import org.jetbrains.compose.app.app
 
-fun main() = application(
+fun main() = app(
     title = "App demo"
 ) {
     Text("Hi")

components/App/library/src/commonMain/kotlin/org/jetbrains/compose/app/App.kt

@@ -0,0 +1,14 @@
+package org.jetbrains.compose.app
+
+import androidx.compose.runtime.Composable
+
+fun app(name: String = "application", title: String = "Compose Application", body: @Composable () -> Unit) {
+    appImpl(name, title, body)
+}
+
+internal expect fun appImpl(name: String, title: String, body: @Composable () -> Unit)
+
+// TODO: not sure if having abstract here is a good idea
+expect abstract class EmbedderContext
+
+expect fun embed(context: EmbedderContext,  body: @Composable () -> Unit)

components/App/library/src/desktopMain/kotlin/org/jetbrains/compose/app/App.desktop.kt

@@ -0,0 +1,16 @@
+package org.jetbrains.compose.app
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.window.singleWindowApplication
+import javax.swing.JComponent
+
+actual fun appImpl(name: String, title: String, body: @Composable () -> Unit) {
+    singleWindowApplication {
+        body()
+    }
+}
+
+actual typealias EmbedderContext = JComponent
+actual fun embed(context: EmbedderContext,  body: @Composable () -> Unit) {
+    TODO("implement me")
+}

components/App/library/src/desktopMain/kotlin/org/jetbrains/compose/app/App.kt

@@ -1,10 +0,0 @@
-package org.jetbrains.compose.app
-
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.window.singleWindowApplication
-
-fun application(name: String = "application", title: String = "Compose Application", body: @Composable () -> Unit) {
-    singleWindowApplication {
-        body()
-    }
-}