I've released a new version of ScalaFXML, which now supports both ScalaFX 8 with JavaFX 8 on Java 8, and ScalaFX 2.2 with JavaFX 2.x on Java 7.

The two branches are separated by the sfx2 and sfx8 postfixes, and both are available for Scala 2.10.x and 2.11.x.

To use it with sbt on Java 7:

addCompilerPlugin("org.scalamacros" % "paradise" % "2.0.1" cross CrossVersion.full)

libraryDependencies += "org.scalafx" %% "scalafx" % "2.2.67-R10"

libraryDependencies += "org.scalafx" %% "scalafxml-core-sfx2" % "0.2.2"

And on Java 8:

addCompilerPlugin("org.scalamacros" % "paradise" % "2.0.1" cross CrossVersion.full)

libraryDependencies += "org.scalafx" %% "scalafx" % "8.0.20-R6"

libraryDependencies += "org.scalafx" %% "scalafxml-core-sfx8" % "0.2.2"