When both JavaFX and Swing dispatchers are on the classpath the following exception is thrown:
java.lang.IllegalStateException: Method setCurrentState must be called on the main thread
at androidx.lifecycle.LifecycleRegistry.enforceMainThreadIfNeeded(LifecycleRegistry.jvm.kt:302)
at androidx.lifecycle.LifecycleRegistry.setCurrentState(LifecycleRegistry.jvm.kt:106)
at androidx.compose.ui.scene.ComposeContainer.updateLifecycleState(ComposeContainer.desktop.kt:463)
at androidx.compose.ui.scene.ComposeContainer.onWindowFocusChanged(ComposeContainer.desktop.kt:225)
at androidx.compose.ui.scene.ComposeContainer.setWindow(ComposeContainer.desktop.kt:317)
at androidx.compose.ui.scene.ComposeContainer.(ComposeContainer.desktop.kt:185)
at androidx.compose.ui.scene.ComposeContainer.(ComposeContainer.desktop.kt:84)
at androidx.compose.ui.awt.ComposeWindowPanel.(ComposeWindowPanel.desktop.kt:52)
at androidx.compose.ui.awt.ComposeWindow.(ComposeWindow.desktop.kt:66)
at androidx.compose.ui.awt.ComposeWindow.(ComposeWindow.desktop.kt:64)
at androidx.compose.ui.window.Window_desktopKt$Window$3$1.invoke(Window.desktop.kt:183)
at androidx.compose.ui.window.Window_desktopKt$Window$3$1.invoke(Window.desktop.kt:181)
at androidx.compose.ui.window.Window_desktopKt$Window$13$1.invoke(Window.desktop.kt:605)
at androidx.compose.ui.window.Window_desktopKt$Window$13$1.invoke(Window.desktop.kt:604)
at androidx.compose.ui.window.AwtWindow_desktopKt$AwtWindow$2$1.invoke(AwtWindow.desktop.kt:70)
at androidx.compose.ui.window.AwtWindow_desktopKt$AwtWindow$2$1.invoke(AwtWindow.desktop.kt:69)
at androidx.compose.runtime.DisposableEffectImpl.onRemembered(Effects.kt:82)
at androidx.compose.runtime.CompositionImpl$RememberEventDispatcher.dispatchRememberObservers(Composition.kt:1364)
at androidx.compose.runtime.CompositionImpl.applyChangesInLocked(Composition.kt:992)
at androidx.compose.runtime.CompositionImpl.applyChanges(Composition.kt:1013)
at androidx.compose.runtime.Recomposer.composeInitial$runtime(Recomposer.kt:1150)
at androidx.compose.runtime.CompositionImpl.composeInitial(Composition.kt:649)
at androidx.compose.runtime.CompositionImpl.setContent(Composition.kt:635)
at androidx.compose.ui.window.Application_desktopKt$awaitApplication$2$1$2.invokeSuspend(Application.desktop.kt:221)
Affected Platforms
Desktop
Versions
Compose Multiplatform 1.7.0
Kotlin 2.1-RC
Windows 11 64-bit
JDK 21
Reproduction Steps
Run any Compose Desktop application when JavaFX coroutine dispatcher is also on the classpath.
Additional Information
Function awaitApplication in package androidx.compose.ui.window explicitly uses the Swing dispatcher.
However, androidx.lifecycle.MainDispatcherChecker will consider the JavaFX dispatcher as Main when available on the classpath and incorrectly report the error.
Current Workaround
Provide custom implementation of kotlinx.coroutines.internal.MainDispatcherFactory that loads the Swing dispatcher with higher priority than JavaFX.
Description
Re-posting from Compose Multiplatformhttps://youtrack.jetbrains.com/issue/CMP-7054
Bug Description
When both JavaFX and Swing dispatchers are on the classpath the following exception is thrown:
Affected Platforms
Desktop
Versions
Reproduction Steps
Run any Compose Desktop application when JavaFX coroutine dispatcher is also on the classpath.
Additional Information
Function
awaitApplicationin packageandroidx.compose.ui.windowexplicitly uses the Swing dispatcher. However,androidx.lifecycle.MainDispatcherCheckerwill consider the JavaFX dispatcher as Main when available on the classpath and incorrectly report the error.Current Workaround
Provide custom implementation of
kotlinx.coroutines.internal.MainDispatcherFactorythat loads the Swing dispatcher with higher priority than JavaFX.