[FIXED] Use JavaFX in Kotlin multiplatform

Issue

The JavaFX gradle plugin works well for a JVM-only project, but I can't figure out how to add JavaFX as a dependency to a multiplatform project's source set. I tried to use the plugin globally, without success. I aslo tried declaring the dependency in this way

  val jvmMain by getting {
      dependencies {
          dependsOn(commonMain)
          implementation("org.openjfx:javafx:18.0.2")
      }
  }

but it does not work.

So how can I use JavaFX in a multiplatform source set ? Thank you in advance !

Solution

After searching the JavaFX gradle plugin, it turns out that I have to use different JARs depending on the platform, as JavaFX has native components. So I wrote this code that works to compile the library, I will look at the packaging later.

kotlin {
    targets {
        jvm()
        // Other targets...
    }

    sourceSets {
        commonMain {
            dependencies {
                // Common dependencies
            }
        }

        // Other source sets

        val jvmMain by getting {
            dependencies {
                // As JavaFX have platform-specific dependencies, we need to add them manually
                val fxSuffix = when (osdetector.classifier) {
                    "linux-x86_64" -> "linux"
                    "linux-aarch_64" -> "linux-aarch64"
                    "windows-x86_64" -> "win"
                    "osx-x86_64" -> "mac"
                    "osx-aarch_64" -> "mac-aarch64"
                    else -> throw IllegalStateException("Unknown OS: ${osdetector.classifier}")
                }
    
                // Replace "compileOnly" with "implementation" for a non-library project
                compileOnly("org.openjfx:javafx-base:18.0.2:${fxSuffix}")
                compileOnly("org.openjfx:javafx-graphics:18.0.2:${fxSuffix}")
                compileOnly("org.openjfx:javafx-controls:18.0.2:${fxSuffix}")
            }
        }
    }
}

This code replaces the plugin entirely.

Answered By - Delikic
Answer Checked By - Mildred Charles (JavaFixing Admin)